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 >

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 > Graphic Abstract

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

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 >

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 > Graphic Abstract

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

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 >

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

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 >

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

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 >

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

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 > Graphic Abstract

Soliman Abdalla^1,2,*, Shiref Kandil²

Journal of Renewable Materials, Vol.10, No.11, pp. 2699-2716, 2022, DOI:10.32604/jrm.2022.022334

Abstract In order to obtain larger, clinical-scale and practical-scale bone grafts, we have designed both tailored scaffolds and tailored bio incubator with optimal bio-production characteristics. Using DIC files to Simpleware Scan-IP (Simple-ware-exeter United Kingdom), we have digitally reconstructed segmental additive bone-tissue in order to perform images processing. Both hydroxyapatite and tannin composites have been used in order to get the final bone modules combined for retexturing of segmental bone defect. We have found that sectioning of bone segment deficiency reorganizations into well disk-shaped design permits one to standardize the cell culture and seeding protocol, to get better products. The present study… More >

Shams B. Ali¹, Sarmad Fawzi Hamza Alhasan¹, Evan T. Salim^2,*, Forat H. Alsultany³, Omar S. Dahham^4,5

Journal of Renewable Materials, Vol.10, No.11, pp. 2819-2834, 2022, DOI:10.32604/jrm.2022.021609

Abstract The pulsed laser deposition (PLD) technology was used to effectively create conductive nano and micro hafnium oxide with great purity and transparency for (HfO₂) nanofilms. In many optoelectronics devices and their applications, the presence of a high dielectric substance like a nano HfO₂, between the metal contacts and the substrates was critical. We used the Pulsed Laser Deposition method to fabricate an Al/HfO₂/p-Si Schottky barrier diode where the nanostructured HfO₂ films as an intermediate layer and varied substrate temperatures. The optical result reveals a high degree of transparency (93%). The optical bandgap of deposited HfO₂ films was observed to vary… More >