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Piyush Kumar Gupta¹, D. Karthik Kumar², M. Thaveena³, Soumya Pandit¹, Somya Sinha⁴, R. Ranjithkumar^2,* , Walaa F. Alsanie⁵, Vijay Kumar Thakur^6,7,8,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3093-3105, 2022, DOI:10.32604/jrm.2022.019335
Abstract Custard apple is a dry land fruit. Its leaves exhibit different pharmacological activities. In the present study, both silver (Ag) nanoparticles and chitosan-coated Ag (Chi-Ag) nanoparticles were fabricated using the aqueous leaf extract of the custard apple plant. During preliminary phytochemical analysis, various types of phytocompounds were found in the aqueous leaf extract of the same plant. Next, both nanoparticles were physiochemically characterized. FTIR analysis exhibited the fingerprint vibrational peaks of active bioactive compounds in plant extract, Ag nanoparticles, and Chi-Ag nanoparticles. UV/Visible spectral analysis revealed the highest absorbance peak at 419 nm, indicating the presence of Ag nanoparticles. XRD… More >

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Lujiang Xu, Geliang Xie, Xianjun Zhou, Yucheng Liu, Zhen Fang^*
Journal of Renewable Materials, Vol.10, No.12, pp. 3107-3118, 2022, DOI:10.32604/jrm.2022.020691
Abstract In this paper, CaO/bio-char was synthesized by directly co-pyrolysis of Ca(OH)₂ and rice straw, and used as catalyst to catalytic pyrolysis of soybean oil to produce high quality biofuel. In this co-pyrolysis process, CaO particles has been successfully embedded on the bio-char surface. During the catalytic pyrolysis process, CaO/bio-char showed a good catalytic performance on the deoxygenation of soybean oil. Pyrolysis temperature affected the pyrolysis reactions and pyrolytic products distributions dramatically, higher pyrolysis temperature lead to seriously cracking reactions, lower bio-oil yield and higher gases yield, and lower pyrolysis temperature lead to higher bio-oil yield with higher oxygenated compounds content… More >

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Yongming Chen^1,2,#, Shuai Huang^1,#, Han Zhao¹, Ru Yang², Yining He¹, Tianyu Zhao¹, Yunlong Zhang¹, Qinghong Kong^1,*, Shasha Sun^3,*, Junhao Zhang³
Journal of Renewable Materials, Vol.10, No.12, pp. 3119-3130, 2022, DOI:10.32604/jrm.2022.019576
（This article belongs to this Special Issue: Bio-based Halogen-free Flame Retardant Polymeric Materials)
Abstract To enhance the thermal stability and flame retardancy of epoxy resin (EP), beta-cyclodextrin (β-CD) is successfully introduced into the layered tin phenylphosphonate (SnPP), which is incorporated into EP matrix for preparing EP/β-CD@SnPP composites. The results indicate that the addition of β-CD@SnPP obviously improve the thermal stability and residual yield of EP composites at higher temperature. When the amount of β-CD@SnPP is only 4 wt%, EP/4β-CD@SnPP composites pass V-1 rating, and LOI value is up to 30.8%. Meanwhile, β- CD@SnPP effectively suppress the heat release and reduce the smoke production of EP/β-CD@SnPP composites in combustion, and the peak heat release rate… More >

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Xuesong Wang^1,#, Zhihong Wang^1,2,#, Qiuling Yang¹, Sheng Peng³, Mijun Peng^1,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3131-3145, 2022, DOI:10.32604/jrm.2022.020204
（This article belongs to this Special Issue: Renewable Biomass as a Platform for Preparing Green Chemistry)
Abstract To evaluate the potential anti-aging ability of Eucommia ulmoides, four characteristic components (chlorogenic acid, geniposidic acid, aucubin, quercetin) were selected to assess their effects on H2O2-induced oxidative damage model of human umbilical vein endothelial cell (HUVEC). Oxidative damage indexes, inflammatory factors, cell cycle, cell apoptosis, cell senescence, and their related proteins were analyzed by methyl thiazolyl tetrazolium (MTT) assay, enzyme-linked immunosorbent assay (ELISA), propidium iodide (PI) staining, annexin V-FITC/ PI double staining, SA β-galactosidase staining, and western blotting (WB). The results showed that H2O2- induced cell growth inhibition rate decreased as supplementation with characteristic components when compared to H2O2 group.… More >

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Hua Jing¹, Shiyao Lu¹, Lili Ji^1,*, Shijie Li¹, Baikang Zhu², Jian Guo³, Jiaxing Sun¹, Lu Cai⁴, Yaning Wang¹
Journal of Renewable Materials, Vol.10, No.12, pp. 3147-3165, 2022, DOI:10.32604/jrm.2022.020215
（This article belongs to this Special Issue: Biochar Based Materials for a Green Future)
Abstract In this study, the magnetic wakame biochar/Ni composites were prepared with three activating reagents of H₃PO₄, ZnCl₂ and KOH by one-step pyrolysis activation, characterized by BET, SEM, TEM, FI-IR, XRD, Raman, and elemental analyzer, and their adsorption performance for diesel were also analyzed. The results showed that wakame biochar/Ni composites had larger specific surface area, abundant porous structure, and various reactive groups, rendering its enhancement of adsorption efficiency. The adsorption experiments indicated that the maximum adsorption capacities for diesel using WBPA 0.5, WBHZ 0.5 and WBPH 0.5 were 4.11, 8.83, and 13.47 g/g, respectively. The Langmuir model was more suitable… More >

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Jianan Wu¹, Ke Xue², Zhaowei Ding³, Lei Lang³, Kang Gu³, Xiaolin Li⁴, Mingli Zhang⁵, Desheng Li^3,6,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3167-3183, 2022, DOI:10.32604/jrm.2022.020265
Abstract Thermal insulation is an important indicator to evaluate the construction material in cold region engineering. As we know, adding the industrial waste as lightweight aggregate or creating the pore inside the cement-based composite could make the texture loose, and the thermal insulating capacity of the material would be improved with this texture. Using these methods, the industrial by-product and engineering waste could be cycled in an efficient way. Moreover, after service the fragmented cement composites paste could be used as aggregate in the thermal insulating concrete again. While the porous texture is not favorable for the mechanical strength and long-term… More >

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Qian Zhou¹, Yueyue Zhang¹, Juanhong Liu^1,2,3,*, Aixiang Wu^1,2, Hongjiang Wang^1,2
Journal of Renewable Materials, Vol.10, No.12, pp. 3185-3199, 2022, DOI:10.32604/jrm.2022.020316
（This article belongs to this Special Issue: Circular Economy in the Development of Eco-Friendly Materials for Construction)
Abstract To improve the economic and social benefits of mining and backfill, it is necessary to find the backfill materials suitable for mineral mining, improve the various properties of the filling materials, and develop low cost, high performance new filling materials. Portland cement is neither environmentally friendly nor economical. Currently, we have begun to study and apply some industrial waste, such as slag, fly ash, and other solid wastes, with certain activities as the primary component of cementing material that will not only meet the technical requirements of filling, but also comprehensively utilize industrial waste and possess a benign, sustainable lifecycle… More >

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Muzi Liao^1,2,#, Hui Tong^1,2,#, Xiangya Huang^1,2, Fang Liu³, Jingwei He^3,*, Sui Mai^1,2,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3201-3215, 2022, DOI:10.32604/jrm.2022.022090
（This article belongs to this Special Issue: Restorative and Regenerative Materials in Biomedical Applications)
Abstract Novel branched silicone methacrylate was developed. The mechanical and biological properties of the resin system were investigated to select the formula proportion with the best overall performance. The novel silicone-containing monomers were combined with an incremental sequence of glass filler concentrations in commonly used Bis-GMA/TEGDMA (50/50, wt./wt.) dental resin systems. Physicochemical properties, surface properties, antibacterial adhesion effect, anti-biofilm effect, protein adsorption, and cytotoxicity were evaluated. The results showed that BSMs did not affect the double bond conversion of dental resin, but could reduce volumetric shrinkage (p < 0.05). The BSM containing resins can resist protein and bacteria adhesion (S. Mutans)… More >

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Elham Azadeh¹, Xinyi Chen², Antonio Pizzi^2,*, Christine Gérardin¹, Philip Gérardin¹, Hisham Essawy³
Journal of Renewable Materials, Vol.10, No.12, pp. 3217-3227, 2022, DOI:10.32604/jrm.2022.022740
（This article belongs to this Special Issue: Renewable Foam Materials and Composites)
Abstract Non-isocyanate polyurethane (NIPU) foams using a hydrolysable tannin, also vulgarly called tannic acid, namely here commercial chestnut wood tannin extract was prepared. Compression strength did not appear to depend on the foam apparent density while the formulation composition of the NIPU foams has been shown to be more determinant. These NIPU foams appeared to be self-extinguishing once the high temperature flame is removed. The ignition time gave encouraging results but for improved fire resistance the foams may need some fire-retardant addition. FTIR spectrometry showed the formation of non-isocyanate urethane linkages. Thermogravimetric analysis indicated a good thermal resistance of these foams,… More >

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Shuangyan Zhang^*, Shun Yang, Chuangui Wang, Weiyi Su, Huangfei Lv, Yuanyuan Li
Journal of Renewable Materials, Vol.10, No.12, pp. 3229-3241, 2022, DOI:10.32604/jrm.2022.020489
Abstract Bamboo harvesting residues are wastes by-products of bamboo industries that contain holocellulose for about 63.14% to 70.71%, which often be discarded, incinerated or buried. In this study, carboxymethyl cellulose was prepared from bamboo harvesting residues (bamboo-branch and bamboo-tip) as raw materials. The chemical composition of bamboo harvesting residues, the viscosity and degree of substitution of carboxymethyl cellulose were determined. Carboxymethyl cellulose obtained was further characterized and compared by means of FTIR, SEM, XRD and TG. Results showed that under the optimized identical conditions, the viscosity and degree of substitution of carboxymethyl cellulose from bamboo-branch and bamboo-tip were 6.0 and 78.9… More >

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Mahdi Hosseini^1,2,*, Bingyu Jian^1,2, Haitao Li^1,2,*, Dong Yang^1,2, Ziang Wang^1,2, Zixian Feng^1,2, Feng Shen³, Jian Zhang⁴, Rodolfo Lorenzo⁵, Ileana Corbi⁶, Ottavia Corbi⁶
Journal of Renewable Materials, Vol.10, No.12, pp. 3243-3262, 2022, DOI:10.32604/jrm.2022.022171
（This article belongs to this Special Issue: Bio-Composite Materials and Structures-2021)
Abstract The use of fibre-reinforced polymer (FRP) to confine concrete columns improves the strength and ductility of the columns by reducing passive lateral confinement pressure. Many numerical and analytical formulations have been proposed in the literature to describe the compressive behaviour of FRP confined concrete under both monotonic and cyclic loads. However, the effect of a stress/strain level in the columns has not been well defined because of the lack of well-defined strategies of modelling and oversimplification of the model. This paper reviews the existing FRP combinations and the available numerical and analytical methods to determine the effectiveness of the adopted… More >

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Weixing Zhang, Chunxia He^*
Journal of Renewable Materials, Vol.10, No.12, pp. 3263-3283, 2022, DOI:10.32604/jrm.2022.020516
（This article belongs to this Special Issue: Renewable and Biosourced Adhesives-2021)
Abstract With the exponential growth of the computing power, machine learning techniques have been successfully used in various applications. This paper intended to predict and optimize the shear strength of single lap cassava starchbased adhesive joints for comparison with the application of artificial intelligence (AI) methods. The shear strength was firstly determined by the experiment with three independent experimental variables (starch content, NaOH concentration and reaction temperature). The analysis of range (ANORA) and analysis of variance (ANOVA) were applied to investigate the optimal combination and the significance of each factor for the shear strength based on the orthogonal experiment. The performance… More >

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Rui Wang, Lanlan Shi, Yurong Wang^*
Journal of Renewable Materials, Vol.10, No.12, pp. 3285-3302, 2022, DOI:10.32604/jrm.2022.020546
（This article belongs to this Special Issue: Functionalization of Wood and Bamboo-Based Materials)
Abstract Air-dry density, modulus of rupture (MOR), modulus of elasticity (MOE), compressive strength parallel to grain, and hardness of Catalpa bungei clones were investigated in this study with feasibility of predicting these properties by near-infrared (NIR) spectroscopy. The best candidate ‘Luoqiu 3’ has been selected from three clones based on wood physical and mechanical property indices. Lower values of wood physical and mechanical properties have been found in the corewood compared to the outerwood. There were significant positive correlations between the air-dry density and mechanical properties. Information from cross section for air-dry density, compressive strength parallel to grain, and hardness yielded… More >

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Yuhang He¹, Rongzhuo Zhang¹, Sarah Mohrmann², Zheng Wang^1,*, Jiujin Fang³
Journal of Renewable Materials, Vol.10, No.12, pp. 3303-3311, 2022, DOI:10.32604/jrm.2022.020681
（This article belongs to this Special Issue: Advanced Wood Composites from Renewable Materials)
Abstract In order to explore the characteristics of the three-dimensional surface morphology of sawn timber, a threedimensional wood surface morphology tester based on the scanning probe method and the principle of atomic force microscope was used to test the three-dimensional surface morphology of three kinds of sawn timber and calculate its surface roughness. This study also analyzed the reasonable plan for the value of wood surface roughness and the advantages of the three-dimensional shape tester, as well as the influence of tree species, three sections, air-dry density and other factors on the surface roughness of the specimen after mechanical processing. The… More >

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Xin Han^1,4, Zhichao Lou^1,3,4,*, Chenglong Yuan^1,4, Xinwu Wu^1,4, Jie Liu^1,4, Fujin Weng², Yanjun Li^1,4,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3313-3334, 2022, DOI:10.32604/jrm.2022.021066
Abstract With the aim of utilizing reconstituted bamboo as a carbon cycle-oriented material, the improvement of physical and mechanical properties has been actively studied to solve using problems. The saturated steam heat treatment process has been widely used in worldwide. With the development and exploration of this technology, two-step saturated steam heat treatment process appears in some practical production, that is, after a period of saturated steam heat treatment at a lower temperature, the bamboo bundles are taken out and seasoned for a period of time, and then put back into the heat tank again, and heated at a higher temperature… More >

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Xiaoling Qu, Xingshuo Yang, Siqi Li, Changan Tian, Zaibo Li, Zhiguang Zhao^*
Journal of Renewable Materials, Vol.10, No.12, pp. 3335-3350, 2022, DOI:10.32604/jrm.2022.020636
Abstract The associated MgO in limestone is believed to affect the volume stability of cementitious materials at room temperature, which limits the utilization of low-grade limestone. In this study, MgO was used as an alkali activator instead of partial CaO to prepare the aerated concrete under hydrothermal conditions. The expansion process was studied to evaluate the influence of the raw materials on the gas forming stability of the slurry. The pore structure (porosity, pore size and its distribution) was analyzed by the image method. The physic-mechanical properties (density, strength, thermal properties) of concrete with the addition of MgO were comprehensively investigated.… More >

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Min Huang, Zhirong Liu^*, Xiang Li
Journal of Renewable Materials, Vol.10, No.12, pp. 3351-3372, 2022, DOI:10.32604/jrm.2022.022393
（This article belongs to this Special Issue: Bio-based Composite/Hybrid Structures and Components)
Abstract In order to achieve the goal of circular economy and sustainable development of ecological environment, it is important to separate and recover associated elements from rare mineral resources. Compared with traditional physical and chemical remediation methods of contaminated soil, phytoremediation is regarded as the most promising green in-situ restoration technology. The purpose of this review is to effectively alleviate the environmental problems caused by rare tailings contaminated soil through phytoremediation and realize the recovery of uranium-thorium, rare earth elements (REEs) and tantalum-niobium. This review took rare tailings with uranium-thorium, REEs, tantalum-niobium in China as the research object, then the background,… More >

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Jianjun Guo^1,2, Lingling Jia³, Sandra Senyo Fometu⁴, Qiang Ma⁵, Jinjin Wang¹, Hang Li¹, Lei Jiang⁵, Guohua Wu^1,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3373-3389, 2022, DOI:10.32604/jrm.2022.021087
（This article belongs to this Special Issue: Natural Fibre Composites: Design, Materials Selection and Fabrication)
Abstract Traditionally, silkworm silk has been used to make high-quality textiles. Nevertheless, various wastes from silkworm silk textiles that are no longer used are increasing, which is also causing considerable waste and contamination. This issue is causing widespread concern in countries that use more silk. Regenerated silk fibroin (RSF) fibers have been shown to be fragile and tender, which prohibits RSF from being widely used as a structural component. Therefore, enriching the function of silk and enhancing the RSF mechanical properties are important directions to expand the comprehensive utilization of silk products. In the present research, wet spinning was used to… More >

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Xin Wan^1,2,#, Zhigang Xia^3,4,#, Xiaoli Yang^1,2, Chengfeng Zhou², Yuanming Zhang^1,2, Haoxi Ben^1,2, Guangting Han^1,2, Wei Jiang^1,2,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3391-3404, 2022, DOI:10.32604/jrm.2022.021102
（This article belongs to this Special Issue: Biochar Based Materials for a Green Future)
Abstract The toxic dyestuffs from printing and dyeing wastewater have caused serious damages to the ecological environment, thus exploring effective methods to remove them having become a key topic. Here, a series of biochar samples were synthesized form kenaf to adsorb methylene blue (MB), which was acted as the dye representative for the test of adsorption capacity due to the presence of abundant double bond and aromatic heterocyclic ring. By tuning the raw materials and pyrolysis temperature, a super adsorption capacity about 164.21 mg·g^–1 was obtained over the biochar that pyrolyzed at 700°C with the kenaf fiber as raw material. Through… More >

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Xiumei Zhong¹, Yuxin Liang^1,2,*, Qian Wang^1,*, Jinlian Ma¹, Shouyun Liang², Yan Wang¹, Xiaowei Xu¹
Journal of Renewable Materials, Vol.10, No.12, pp. 3405-3424, 2022, DOI:10.32604/jrm.2022.021120
Abstract The road subgrade and road surface in collapsible loess area are prone to many engineering diseases such as uneven subgrade settlement, insufficient bearing capacity of soaked foundation, collapse and instability of subgrade side slope due to the special properties of loess. As an environment-friendly, low-cost soil modifier with good adhesion and chelation properties, lignin has been considered to be used in highway subgrade construction. In order to explore the effect of lignin on loess, the compressive and collapsible properties of modified loess with different lignin contents were analyzed based on consolidation compression test. The improvement mechanism of lignin on loess… More >

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Huailin Li^1,2, Chan Zhang¹, Shisheng Zhou^1,2,*, Bin Du^1,2, Xue Li¹
Journal of Renewable Materials, Vol.10, No.12, pp. 3425-3438, 2022, DOI:10.32604/jrm.2022.021157
（This article belongs to this Special Issue: Green, Recycled and Intelligent Technologies in Printing and Packaging)
Abstract Printing quality evaluation is an important means to check whether prints are qualified. However, the current printing quality evaluation system for gravure decorative paper is not perfect. In order to solve this problem, a method for evaluating quality of decorative paper based on analytical hierarchy process (AHP) and the entropy weight method (EWM) model is proposed in this paper. So as to verify the proposed model, decorative paper of different grades was selected as the experimental objects. Firstly, the data about five indices reflecting printing quality were measured. Secondly, the evaluation model was used to assign weights to the indices,… More >

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Jiamao Li^1,2,*, Chuimin Zhang¹, Lin Li¹, Chuangang Fan^1,*, Zhaofang He³, Yuandi Qian³
Journal of Renewable Materials, Vol.10, No.12, pp. 3439-3458, 2022, DOI:10.32604/jrm.2022.021214
Abstract The purpose of this paper was to explore the possibility of using low-alkalinity cementitious materials as binders, in which ground blast furnace slag and fly ash acted as a partial replacement of ordinary Portland cement, and CaSO₄, Na₂SO₄, and CaO were used as a sulfate activator and alkali-activated additives, to solidify gold mine tailings for preparation of a green, inexpensive cemented paste backfill (CPB). For this target, the effects of cement/ tailings ratio, superplasticizer dosage, solid content, tailings fineness on the mechanical properties of the CPB were investigated. Additionally, the hydration mechanism of the CPB was analyzed based on X-ray… More >

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Yuhao Zhou, Yuhang He, Zhaoyu Shen, Zheng Wang^*
Journal of Renewable Materials, Vol.10, No.12, pp. 3459-3476, 2022, DOI:10.32604/jrm.2022.021251
（This article belongs to this Special Issue: Bio-Composite Materials and Structures-2021)
Abstract In this article, dynamic method and static method of testing Poisson’s ratio of OSB (Oriented Strand Board) were proposed. Through modal and static numerical analyses, the position where the transverse stress is equal to zero was determined. The binary linear regression method was applied to express the gluing position of the strain gauge as a relational expression that depended on the length-width ratio and width-thickness ratio of the cantilever plate. Then the longitudinal and transverse Poisson’s ratios of OSB were measured by the given dynamic and static methods. In addition, the test results of OSB Poisson’s ratio were analyzed with… More >

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Daguan Huang^1,*, Ditao Niu², Li Su^3,*, Hao Zheng², Qiang Fu², Yunhe Liu¹
Journal of Renewable Materials, Vol.10, No.12, pp. 3477-3489, 2022, DOI:10.32604/jrm.2022.021282
（This article belongs to this Special Issue: Potential Materials Towards Sustainable Construction)
Abstract Coral materials can replace concrete aggregates and achieve material self-sufficiency for reducing the construction costs of island projects. This paper studies the effects of different mineral admixtures on the properties of coral aggregate concrete (CAC). The chloride concentration of CAC after different erosion times is measured using the potentiometric method, and the porosity of the CAC is calculated using thermogravimetric and drying methods. The chloride concentration of the CAC presents a two-phases distribution. The peak chloride concentration followed a power function, increasing with the erosion time. The chloride diffusion coefficient of CAC is 7.9%– 37.5% larger than that of ordinary… More >

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Bo Chen¹, Bo Liu^2,*, Yong Chao³, Chao Zhong¹
Journal of Renewable Materials, Vol.10, No.12, pp. 3491-3504, 2022, DOI:10.32604/jrm.2022.021302
（This article belongs to this Special Issue: New Trends in Bio-oil Production, Conversion and Utilization )
Abstract The formation process of aromatic hydrocarbon tar during the pyrolysis process of biomass components of cellulose and lignin was carried out by quantum chemical calculation based on density functional theory method B3LYP/6-31G++(d, p). 5-Hydroxymethylfurfural was chosen as the model compound of cellulose and hemicellulose, and syringaldehyde was chosen as the model compound of lignin. The calculation results show that the formation process of cellulose monocyclic aromatic hydrocarbon tar is the conversion process of benzene ring from furan ring, and the highest reaction energy barrier appears in the process of decarbonylation, which is 370.8 kJ/mol. The formation of lignin monocyclic aromatic… More >

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Yangyang Hao, Yue Liu^*, Guorui Cao^*
Journal of Renewable Materials, Vol.10, No.12, pp. 3505-3519, 2022, DOI:10.32604/jrm.2022.023122
（This article belongs to this Special Issue: Perovskite Solar Cells)
Abstract Aiming to reduce the defects of perovskite film and improve carrier transport, an organic small molecule, benzo [d]isothiazol-3(2H)-one 1,1-dioxide (OBS), is introduced as an additive in the solution-processing of perovskite and prepare uniform perovskite films with a continuous distribution of OBS at grain boundaries. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy are conducted to reveal the interactions of hydrogen bonding and coordination bonding between OBS and perovskite. Various characterizations (including X-ray diffraction, UV-vis spectroscopy, electrochemical impedance spectroscopy, etc.) are conducted to uncover the effect of OBS on device performance. Consequently, high efficiency of 23.26% is obtained for the OBS-treated… More >

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Shun Kang¹, Xun Yuan¹, Changwu Liu^1,*, Yulin Chen¹, Xianliang Zhou¹, Haikuan Wu², Zhiguo Ma³
Journal of Renewable Materials, Vol.10, No.12, pp. 3521-3538, 2022, DOI:10.32604/jrm.2022.021694
（This article belongs to this Special Issue: Bio-Composite Materials and Structures-2021)
Abstract Part of the tunnel spoil can not be used for concrete due to alkali-aggregate reaction (AAR). Water is an indispensable condition for AAR, so separating the alkali-aggregate from water is of great benefit to controlling the AAR. This paper investigates the modification of concrete and aggregate by hydrophobic impregnation and organic coating and then evaluates their waterproof and mechanical properties by dynamic contact angle (DCA), ultrasonic wave velocity, scanning electron microscope (SEM), nuclear magnetic resonance (NMR), and so on. For waterproofness, hydrophobic impregnation and organic coating can both improve the waterproofness of concrete and aggregate. The organic coating is suitable… More >

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Bo Zhang^1,2, Keqing Li^1,2, Siqi Zhang^1,2, Yafei Hu^1,2, Bin Han^1,2,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3539-3558, 2022, DOI:10.32604/jrm.2022.021845
（This article belongs to this Special Issue: Circular Economy in the Development of Eco-Friendly Materials for Construction)
Abstract Cemented paste backfill (CPB) is a sustainable mining technology that is widely used in mines and helps to improve the mine environment. To investigate the relationship between aggregate grading and different affecting factors and the uniaxial compressive strength (UCS) of the cemented paste backfill (CPB), Talbol gradation theory and neural networks is used to evaluate aggregate gradation to determine the optimum aggregate ratio. The mixed aggregate ratio with the least amount of cement (waste stone content river sand content = 7:3) is obtained by using Talbol grading theory and pile compactness function and combined with experiments. In addition, the response… More >

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Nora Elizondo-Villarreal^1,*, Luz H. Verástegui-Dominguez¹, Jose J. Quijano-Briones¹, Francisco J. Vázquez-Rodríguez², Eden Rodríguez-Castellanos³, Enrique López-Cuellar³, Ernesto Torres-Lopez¹, Victor M. Castaño-Meneses^4,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3559-3572, 2022, DOI:10.32604/jrm.2022.021945
（This article belongs to this Special Issue: Restorative and Regenerative Materials in Biomedical Applications)
Abstract

Agave salmiana ash and poultry eggshell powder as CaO sources were used for obtaining nanostructured hydroxyapatite (HAP). The synthesis was carried out by the Green Chemistry Hydrothermal Biosynthesis at 180°C with a pH of 5, by reacting CaO from Agave Salmiana ash and Eggshell powder, with dibasic calcium phosphate (CaHPO₄•2H₂O) in an aqueous solution, with Aloe barbadensis extract. The product was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The size and shape of the hydroxyapatite particles changed dramatically in the presence of Aloe barbadensis. Large crystals of Hydroxyapatite were observed… More >

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Zhiguang Yang^1,*, Gaojun Yan^1,2, Xueping Liu¹, Zhengyuan Feng¹, Xinfeng Zhu¹, Yanli Mao¹, Songtao Chen¹, Zhisheng Yu², Ruimei Fan³, Linlin Shan^3,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3573-3585, 2022, DOI:10.32604/jrm.2022.022031
（This article belongs to this Special Issue: Biochar Based Materials for a Green Future)
Abstract Adsorption can be used to recover effectively the volatile organic gases (VOCs) in the exhaust gas from factories through using an appropriate adsorption bed. Due to form a physical or chemical bond, adsorption occurs between the porous solid medium and the liquid or gas multi-component fluid mixture. The regeneration capacity of the adsorbent is as important as the adsorption capacity and it determines the economics of the adsorption system. The regeneration of adsorbent can be realized through changing the pressure or temperature of the system. Here, activated carbon samples from coconut shell were prepared and characterized. Benzene or formaldehyde in… More >

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Xiaoxia Yang¹, Yisheng Gao^2,*, Shuhua Zhang¹, Zhedong Ge¹, Yucheng Zhou¹
Journal of Renewable Materials, Vol.10, No.12, pp. 3587-3598, 2022, DOI:10.32604/jrm.2022.022300
（This article belongs to this Special Issue: Functionalization of Wood and Bamboo-Based Materials)
Abstract Rosewood is a kind of high-quality and precious wood in China. The correct identification of rosewood species is of great significance to the import and export trade and species identification of furniture materials. In this paper, micro CT was used to obtain the micro images of cross sections, radial sections and tangential sections of 24 kinds of rosewood, and the data sets were constructed. PCA method was used to reduce the dimension of four features including logical binary pattern, local configuration pattern, rotation invariant LBP, uniform LBP. These four features and one feature not reducing dimension (rotation invariant uniform LBP)… More >

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Qingguo Ben¹, Congcong Zhang², Benkai Shi², Huifeng Yang^2,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3599-3610, 2022, DOI:10.32604/jrm.2022.022344
（This article belongs to this Special Issue: Bio-based Composite/Hybrid Structures and Components)
Abstract Stress laminated timber (SLT) deck is assembled using timber (lumber or glulam) components placed side by side and stressed together, which has the advantages of easy prefabrication and good cost performance. This work presented an experimental investigation of bending tests performed on SLT slabs. Several parameters, including prestress levels, distance of pre-stressing bars, and the existence of self-tapping screw (STS) reinforcement, were taken into consideration. To reinforce the compressive property of timber perpendicular to the grain, the STSs were placed under the anchor plate of the pre-stressed bars. The experimental results were analyzed and discussed in terms of failure modes,… More >

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Kangze Yuan¹, Kui Liu^1,2,*, Guoyang Yi³, Bowen Yang²
Journal of Renewable Materials, Vol.10, No.12, pp. 3611-3627, 2022, DOI:10.32604/jrm.2022.022458
Abstract Cement Stabilized Loess (CSL) sample has a long history as a method of improving building foundations. In this paper, the main physical (specific gravity, consistency limit, optimum moisture content, and maximum dry density) and mechanical properties (Unconfined Compressive Strength (UCS) and shear strength parameters) of CSL samples with different cement content were investigated, and the change reasons were explored by mean of SEM test. Meanwhile, quantitative analysis software Image-Pro Plus (IPP) 6.0 was used to characterize the microstructural evolution of pores in compacted loess and CSL sample. As the cement content increased, the specific gravity and optimum water content in… More >

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Usama Sayed^1,2, Assima Dauletbek^1,2, Xue Xin^1,2, Rodolfo Lorenzo³, Haitao Li^1,2,*
Journal of Renewable Materials, Vol.10, No.12, pp. 3629-3657, 2022, DOI:10.32604/jrm.2022.022624
Abstract In light of the increasing demand for sustainable building materials, the effectiveness of bamboo utilization in various fields has become the object of scientists’ close attention. The increased interest in bamboo is explained by its sustainable characteristics, which make it the most preferred material for environmentally friendly and costeffective construction compared to conventional ones. Applicability of bamboo is vast and diverse: from decoration and furniture to structural members and reinforcement. Due to the low price, rich resources, and high elasticity, bamboo culms have also been used as an alternative to steel reinforcement in concrete structures. Extensive research has been done… More >

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Sumari Sumari^*, Mega Murti, Aman Santoso, Muhammad Roy Asrori
Journal of Renewable Materials, Vol.10, No.12, pp. 3659-3670, 2022, DOI:10.32604/jrm.2022.022995
Abstract Kapok seed oil is an environmentally friendly biodiesel feedstock. The problem of the best catalyst for transesterification of Kapok seed oil still continues today. The research developed a base-heterogeneous catalyst with the effect of ultrasonic waves during transesterification. So, the study aims: (1) to determine the type of natural zeolite used, (2) to determine the characteristics of the synthesized CaO:BaO/ANZ catalyst, and (3) to determine the effectiveness of the CaO:BaO/ANZ catalyst in the biodiesel production process through sono-transesterification of kapok seed oil. The research stages consisted of: (1) activation of natural zeolite and its characterization, (2) preparation of CaO:BaO/ANZ catalyst,… More >

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