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  • Open Access

    ARTICLE

    Development of Gelatin-Based Active Packaging and Its Application in Bread Preservation

    Hui Zheng1,2, Xiaohan Chen2, Li Li2, Dawei Qi1, Jiale Wang1, Jiaying Lou1,*, Wenjun Wang1,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027748
    (This article belongs to this Special Issue: Active and Intelligent Food Packaging Films)
    Abstract The issue of plastic pollution has attracted widespread social attention. Gelatin is valued as a degradable bio-based material, especially as an edible active packaging material. However, the commonly used solution-casting filmforming technology limits the mass production of gelatin films. In order to improve the production efficiency and enhance the commercial value of gelatin films, in this study, fish gelatin (FG) particles were successfully blended with essential oils (EOs) to prepare active films by melt extrusion technique, a common method for commercial plastics, and applied to bread preservation. FG and EOs showed good compatibility with each other. The elongation at break… More >

  • Open Access

    ARTICLE

    Two-Step Preparation of Hierarchical Porous Carbon Materials Derived from Tannin for Use as an Electrode Material for Supercapacitors

    Jianping Deng1, Qianqian Zhang1, Yuling Lan1, Lingcong Luo1, Zimin Dai1, Zhonghang Lin1, Zhixin Lu1, Jiancheng Yuan1, Yiqi Fu1, Lu Luo2,*, Weigang Zhao1,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027163
    (This article belongs to this Special Issue: Advanced Renewable Energy Storage Materials and Their Composite: Preparation, Characterization and Applications)
    Abstract The development and utilization of biomass and agroforestry processing byproducts for high-value applications have been an important topic in the field of renewable materials research. Based on this, a two-step microwave hydrothermal pre-carbonization and KOH activation method was proposed to synthesize tannin-based activated carbons with a high specific surface area, hierarchical pore structure, and good electrochemical performance. The microstructure, texture properties, and physicochemical characteristics were investigated. The results show that the prepared tannin-based activated carbons presented a hierarchical pore structure (micro- and mesopores) with a specific surface area as high as 997.46 m3 g−1 . The electrochemical analysis shows that… More >

  • Open Access

    ARTICLE

    A Melamine–Dialdehyde Starch Wood Particleboard Surface Finish without Formaldehyde

    Bengang Zhang1,*, Antonio Pizzi2,*, Mathieu Petrissans1, Anelie Petrissans1, Baptiste Colin1
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.028888
    Abstract Melamine-dialdehyde starch resins used for wood surface finishes have been developed. The reaction of melamine with dialdehyde starch has been shown to occur by FTIR and MALDI ToF spectrometry, with several oligomer species due to the reaction of the two materials being identified, and the resin thermal stability was studied by thermogravimetric analysis. The resins were prepared by two different procedures when it was realized that dialdehyde starch is sensitive to too high a temperature for prolonged times. The melamine-dialdehyde starch resins were applied on particleboard supports as a direct liquid surface finish and a resin-impregnated paper. The surface finishes… More >

  • Open Access

    ARTICLE

    Numerical Study on the Behaviour of Hybrid FRPs Reinforced RC Slabs Subjected to Blast Loads

    Mahdi Hosseini1,2,*, Bingyu Jian1,2, Jian Zhang3, Haitao Li1,2,*, Rodolfo Lorenzo4, Ahmad Hosseini5, Pritam Ghosh5, Feng Shen6, Dong Yang1,2, Ziang Wang1,2
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.028164
    Abstract The safety of civilian and military infrastructure is a concern due to an increase in explosive risks, which has led to a demand for high-strength civil infrastructure with improved energy absorption capacity. In this study, a Finite Element (FE) numerical model was developed to determine the effect of hybrid Fibre Reinforced Polymer (FRP) as a strengthening material on full-scale Reinforced Concrete (RC) slabs. The reinforcing materials under consideration were Carbon (CFRP) and Glass (GFRP) fibres, which were subjected to blast loads to determine the structural response. A laminated composite fabric material model was utilized to model the failure of composite,… More >

  • Open Access

    SHORT COMMUNICATION

    Treating CsPbI3 Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells

    Qixian Zhang#, Yi Guo#, Huicong Liu, Weiping Li, Liqun Zhu, Haining Chen*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027730
    (This article belongs to this Special Issue: Perovskite Solar Cells)
    Abstract All-inorganic CsPbI3 perovskite has attracted wide attention due to its desirable optical bandgap (Eg: ∼1.7 eV) as well as high chemical stability. Nevertheless, the photovoltaic performance of CsPbI3 perovskite solar cells (PSCs) was limited by severe nonradiative charge recombination due to high defect density at the grain boundary and surface of perovskite films. To address this issue, a pyrrolidinium iodide (PyI) molecule was introduced to modify the surface and grain boundary of CsPbI3 perovskite films to passivate defects, which improves the quality of CsPbI3 perovskite films as well as induces the generation of a quasi-2D Py2CsPb2I7 capping layer between perovskite… More >

  • Open Access

    ARTICLE

    Novel Pectin/Chia-Mucilage Membranes: Human Serum Albumin Adsorption, Biocompatibility, and Physical-Chemical Properties

    S. E. Burruel-Ibarra1, R. A. Esquer-Osuna2, R. G. Valdez-Melchor2, D. A. Cuevas-Acuña2, L. QuihuiCota3, J. Juárez4, J. C. Campos-García2, E. Valbuena-Gregorio2, M. A. López-Mata2,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027372
    (This article belongs to this Special Issue: Advancement of Biopolymers in Biomedical Materials)
    Abstract This study aimed to characterize the physical-chemical and biological properties of pectin (PC)/chia seed mucilage (CM) membranes. PC/CM [100/0 (control), 80/20%, 60/40%, and 40/60% w/w] membranes were prepared using the casting method. The membranes (PC/CM) were thin, yellow, lightly opaque (≈10%) and capable of blocking light UVB (between 66 at 52%). SEM analysis showed the presence of aggregates in the shape of a sphere (≈13 µm) and ovoid (≈25 µm). The proportion of 80/20 showed an increase in tensile strength (29%) and elastic modulus (19%) when compared to the control. FTIR analysis exhibited intermolecular interactions between PCPC, PC-CM, and CM-CM… More >

  • Open Access

    ARTICLE

    Multifunctional Lubricant Additive Improves Lubrication and Antioxidation Properties of Tung Oil

    Na Yao1, Haiyang Ding1,2,*, Mei Li1, Shouhai Li1,2, Lina Xu1, Xiaohua Yang1
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026823
    Abstract It is of considerable significance to develop efficient and environmentally friendly machinery lubricant additives because of the increasing depletion of petrochemical resources and severe environmental problems. Herein, we proposed a facile strategy to synthesize a multifunctional vegetable oil-based lubricant via the lignin derivative vanillin coupled to amine and diethyl phosphite to produce a lubricating additive with both extreme pressure and antioxidant properties. Compared with pure tung oil, the lubricating and antioxidant performance of tung oil is significantly improved after adding additives. Adding the 1.0 wt% additive to the tung oil reduced the friction wear coefficient and the volume, and the… More >

  • Open Access

    REVIEW

    Biofuel Recovery from Plantain and Banana Plant Wastes: Integration of Biochemical and Thermochemical Approach

    Abdulmoseen Segun Giwa1,*, Mingqiang Sheng2, Ndungutse Jean Maurice3, Xinxin Liu1, Zelong Wang1, Chang Fengmin4, Bo Huang4, Kaijun Wang4
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026314
    Abstract Globally, fossil fuel dependence has created several environmental challenges and climate change. Hence, creating other alternative renewable and ecologically friendly bio-energy sources is necessary. Lignocellulosic biomass has gained significant attention recently as a renewable material for biofuel production. The large amounts of plantain and banana plant parts wasted after harvesting, as well as the peels generated daily by the fruit market and industries, demonstrate the potential of bioenergy resources. This review briefly assesses plantain and banana plant biomass (PBB) generated in the developing, developed, and underdeveloped countries, the consumable parts, and feasible products yield. It emphasized the advantages and disadvantages… More >

  • Open Access

    REVIEW

    Synthesis of Metallic Nanoparticles Based on Green Chemistry and Their Medical Biochemical Applications: Synthesis of Metallic Nanoparticles

    Kakudji Kisimba1, Anand Krishnan2,*, Mbuso Faya1, Kahumba Byanga3, Kabange Kasumbwe4, Kaliyapillai Vijayakumar5, Ram Prasad6,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026159
    (This article belongs to this Special Issue: New Insights on Nanomaterials for Energy, Environmental and Agricultural Applications)
    Abstract Nanoparticles have distinct properties that make them potentially valuable in a variety of industries. As a result, emerging approaches for the manufacture of nanoparticles are gaining a lot of scientific interest. The biological pathway of nanoparticle synthesis has been suggested as an effective, affordable, and environmentally safe method. Synthesis of nanoparticles through physical and chemical processes uses unsafe materials, expensive equipment and adversely affects the environment. As a result, in order to support the increased utilization of nanoparticles across many sectors, nanotechnology research activities have shifted toward environmentally safe and cost-effective techniques that outperform chemical and/or biological procedures. The use… More >

  • Open Access

    ARTICLE

    Coordinate-Parametric Matrix Model Inspired Square-Conjoint Pattern in Cross Woven for Conventional Bamboo Mat

    Ye Fu1, Liwen Deng1,*, Jinbo Hu2,3,*, Ti Li3, Shanshan Chang2
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.028454
    (This article belongs to this Special Issue: Computational Tools for Renewable Materials)
    Abstract In the study, it is proposed that a coordinate-parametric matrix model is performed to a square-conjoint pattern of cross woven (SCPCW) in the bamboo mat. The patterns of SCPCW are firstly detected according to the perspective of configuration, which is divided into the basic-monomer shape and the basic combination shape. Secondly, the compositions of design patterns in SCPCW are analyzed to attain the trend of curve shape. Based on the coordinate-parametric matrix model, the specimens of SCPCW are subsequently accomplished to elaborate the woven logic of bamboo mats. The digital innovation of SCPCW, defined by a mathematical resolution, is implemented… More >

  • Open Access

    ARTICLE

    Experimental Study for the Cementation Effect of Dust Soil by Using Soybean Urease

    Jianwei Zhang1, Yue Yin1, Lei Shi1, Yi Han2, Mi Zhou3,*, Xihong Zhang4
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025436
    Abstract Dust is an environmental and health hazard. In this study, a new technology for dust suppressant is introduced using soybean urease with an optimal cementing solution. Calcium carbonate is produced by soybean urease and cementing solution, which bonds the soil particles towards a dust suppressant. A laboratory wind tunnel test is carried out to examine its effectiveness and discover possible optimization solutions. Several factors, including soybean meal concentration, cementing solution concentration, and volume of solution per unit area, are examined to quantify their influences on soil transport mass, evaporation ratio, evaporation rate, surface strength, water retention ratio, and infiltration rate… More >

  • Open Access

    ARTICLE

    Preliminary Study on the Treatment Efficiency of Pasteurized Lime Thermal Alkaline Hydrolysis for Excess Activated Sludge and Reduction of Tetracycline Resistance Genes

    Maoxia Chen1,2,*, Qixuan Zhou1, Jiayue Zhang1, Jiaoyang Li1, Wei Zhang1, Huan Liu1
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027826
    Abstract Thermal alkaline hydrolysis is a common pretreatment method for the utilization of excess activated sludge (EAS). Owing to strict environment laws and need for better energy utilization, new methods were developed in this study to improve the efficiency of pretreatment method. Direct thermal hydrolysis (TH), pasteurized thermal hydrolysis (PTH), and alkaline pasteurized thermal hydrolysis (PTH + CaO and PTH + NaOH) methods were used to treat EAS. Each method was compared and analyzed in terms of dissolution in ammonium nitrogen (NH4 + -N) and soluble COD (SCOD) in EAS. Furthermore, the removal of tetracycline resistance genes (TRGs) and class 1… More >

  • Open Access

    ARTICLE

    Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar

    Wenjing Xia1,*, JinHui Wang1, Tao Xu1, Nan Jiang2
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026971
    (This article belongs to this Special Issue: Environmentally Friendly and Renewable Civil Engineer Materials)
    Abstract To understand the effects of filler-asphalt ratio on different properties of lignin and polyester fiber reinforced shape memory polyurethane (SMPU)/styrene butadiene styrene (SBS) composite modified asphalt mortar (PSAM), as well as to reveal the reinforcing and toughening mechanisms of lignin and polyester fibers on PSAM, SMPU, SBS and mineral powder were first utilized to prepare PSAM. Then the conventional, rheological and anticracking properties of lignin fiber reinforced PSAM (LFAM) and polyester fiber reinforced PSAM (PFAM) at different filler-asphalt ratios were characterized. Test results indicate that the shear strength, deformation resistance and viscosity are increased after adding 0.8wt% lignin fiber or… More >

  • Open Access

    ARTICLE

    The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

    Jiahao Wang1, Jie Zhou2, Zhengping Zhao2,*, Feng Chen1, Mingqiang Zhong1
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027278
    Abstract Three-dimensional C/SiOx nanofiber anode was prepared by polydimethylsiloxane (PDMS) and polyacrylonitrile (PAN) as precursors via electrospinning and freeze-drying successfully. In contrast to conventional carbon covering Si-based anode materials, the C/SiOx structure is made up of PAN-C, a 3D carbon substance, and SiOx loading steadily on PAN-C. The PAN carbon nanofibers and loaded SiOx from pyrolyzed PDMS give increased conductivity and a stable complex structure. When employed as lithium-ion batteries (LIBs) anode materials, C/SiOx-1% composites were discovered to have an extremely high lithium storage capacity and good cycle performance. At a current density of 100 mA/g, its reversible capacity remained at… More >

  • Open Access

    ARTICLE

    Low-Temperature Synthesis of Nano-AlN Based on Solid Nitrogen Source by Plasma-Assisted Ball Milling

    Zhuoli Yang1, Xianbin Hou2, Leyang Dai2,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025723
    (This article belongs to this Special Issue: Carbon-Based Nanomaterials from Renewable Materials: Synthesis, Properties and Applications)
    Abstract Plasma-assisted ball milling was carried out on the Al+C3H6N6 system and Al+C4H4N4 system, respectively. The phase structure, functional groups and synthesis mechanism were analyzed by XRD and FT-IR, and the differences in the synthesis process of nano-AlN with different solid nitrogen sources were discussed. The results show that C3H6N6 has a stable triazine ring structure, and its chemical bond is firm and difficult to break, so AlN cannot be synthesized directly by solid-solid reaction at room temperature. However, there are a large number of nitrile groups (-CN) and amino groups (-NH2) in C4H4N4 molecules. Under the combined action of plasma… More >

  • Open Access

    ARTICLE

    Characterization of Formacell Lignin Derived from Black Liquor as a Potential Green Additive for Advanced Biocomposites

    Sri Hidayati1,*, Eugenia Fonny Budiyanto1, Hadi Saputra1, Sutopo Hadi1, Apri Heri Iswanto2,3, Nissa Nurfajrin Solihat4, Petar Antov5, Lee Seng Hua6,7, Widya Fatriasari4,8, Mohd. Sapuan Salit9
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027579
    (This article belongs to this Special Issue: Advances in Eco-friendly Wood-Based Composites: Design, Manufacturing, Properties and Applications)
    Abstract Black liquor is obtained as a by-product of the pulping process, which is used to convert biomass into pulp by removing lignin, hemicelluloses and other extractives from wood to free cellulose fibers. Lignin represents a major constituent in black liquor, with quantities varying from 20% to 30%, of which a very low share is used for manufacturing value-added products, while the rest is mainly burned for energy purposes, thus underestimating its great potential as a raw material. Therefore, it is essential to establish new isolation and extraction methods to increase lignin valorization in the development of bio-based chemicals. The aim… More >

  • Open Access

    ARTICLE

    Comprehensive Assessment of the Safety of Eucommia ulmoides Leaf Extract for Consumption as a Traditional Chinese Health Food

    Huiling Fu1, Mijun Peng2, Qiuwen Tang2, Haojun Liang2, Yanli Liang2, Jiali Fang2,*, Xuesong Wang2,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026689
    (This article belongs to this Special Issue: Renewable Biomass as a Platform for Preparing Green Chemistry)
    Abstract To ensure the export quality of Eucommia ulmoides leaf extract (ELE) and facilitate E. ulmoides leaf inclusion in the directory of traditional Chinese health foods, an overall safety assessment of ELE was performed, including genotoxicity and long-term toxicity, according to the national food safety standards of China. No variations in the reverse mutation number of the nominal bacterial strains were observed under ELE treatment in comparison with the solvent control. Additionally, the micronucleus rates of in vivo mammalian erythrocytes and in vitro mammalian cells under ELE treatment were equivalent to or significantly lower than those of the solvent control. The… More >

  • Open Access

    REVIEW

    A Review of Experimental Research on the Mode I Fracture Behavior of Bamboo

    Yue Chen1,2, Haitao Li1,2,*, Lei Gao3,*, Wei Xu1,2, Rodolfo Lorenzo4, Milan Gaff5,6
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027634
    Abstract Bamboo is an eco-friendly material with light weight, high strength, short growth cycle and high sustainability, which is widely used in building structures. Engineered bamboo has further promoted the development of modern bamboo structures due to its unrestricted size and shape. However, as a fiber-reinforced material, fracture damage, especially Mode I fracture damage, becomes the most likely damage mode of its structure, so Mode I fracture characteristics are an important subject in the research of mechanical properties of bamboo. This paper summarizes the current status of experimental research on the Mode I fracture properties of bamboo based on the three-point… More >

  • Open Access

    ARTICLE

    Remediation of Cu Contaminated Soil by Fe78Si9B13AP Permeability Reaction Barrier Combined with Electrokinetic Method

    Liefei Pei1,2, Xiangyun Zhang1, Zizhou Yuan1,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025760
    Abstract Iron-based amorphous crystalline powder Fe78Si9B13AP is used as a permeability reaction barrier (PRB) combined with an electrokinetic method (EK-PRB) to study the removal rate of Cu in contaminated soil. After treating Cucontaminated soil for 5 days under different voltage gradients and soil water content, the soil pH is between 3.1 and 7.2. The increase of voltage gradient and soil water content can effectively promote the movement of Cu2+ to the cathode. The voltage gradient is 3 V/cm, and the water content of 40% is considered to be an optional experimental condition. Therefore, under this condition, the effects of Fe78Si9B13AP and… More >

  • Open Access

    ARTICLE

    Role of Calcination Temperature on Isosorbide Production from Sorbitol Dehydration over the Catalyst Derived from Ce(IV) Sulfate

    Medta Boupan1,2, Kanyapak Prompang1, Achiraya Chompunuch1, Piwat Boonma1, Arthit Neramittagapong1,2,3,4, Somnuk Theerakulpisut5, Sutasinee Neramittagapong1,2,3,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026397
    (This article belongs to this Special Issue: Value-Added Chemicals and Renewable Materials from Pyrolysis of Organic Solid Wastes: Mechanism, Production, Upgrading, and Application)
    Abstract Isosorbide is a multi-purpose chemical that can be produced from renewable resources. Specifically, it has been investigated as a replacement for toxic bisphenol A (BPA) in the production of polycarbonate (PC). In this study, the synthesis of isosorbide by sorbitol dehydration using a cerium-based catalyst derived from calcined cerium (IV) sulfate (300°C, 400°C, 450°C, 500°C, and 650°C) was investigated. The reaction occurred in a high-pressure reactor containing nitrogen gas. Advanced instrumental techniques were applied to analyze the characteristics of the calcined catalyst. The results showed that the calcined catalysts demonstrated different crystalline structures and sulfate species at different temperatures. However,… More >

  • Open Access

    REVIEW

    A Review of Graphene Oxide Crosslinking as Enhanced Corrosion Shield Application

    Nurul Anis Athirah Ab Aziz*, Chin Wei Lai*, Boon Hoong Ong
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025899
    (This article belongs to this Special Issue: Carbon-Based Nanomaterials from Renewable Materials: Synthesis, Properties and Applications)
    Abstract Nowadays, corrosion is not only undesirable, but it also has a significant influence on the industrial sectors and technical innovations that have demand for metals. The global economic damage is expected to reach $2.5 trillion, equivalent to more than 3.4% of the world’s GDP in 2013. It is linked with significant financial harm, manufacturing pollution, and safety issues. An electrochemical process primarily induces metal corrosion at the metalelectrolyte interface region, caused by steel oxidation and the reduction of oxygen, protons, and water. Therefore, organic and epoxy coatings can be applied as protective coatings. Additionally, it can prevent metal corrosion in… More >

  • Open Access

    ARTICLE

    Influence of Recycling Waste Glass as Fine Aggregate on the Concrete Properties

    Rafal A. Hadi1,*, Suhad M. Abd2, Hadee Mohammed Najm3, Shaker Qaidi4,5,*, Moutaz Mustafa A. Eldirderi6, Khaled Mohamed Khedher7,8
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025558
    (This article belongs to this Special Issue: Potential Materials Towards Sustainable Construction)
    Abstract Recent years have witnessed an increase in the quantity of waste glass (WG) across the globe. Replacing the fine aggregate with WG is one of the steps toward preserving the natural resources of the environment and creating low-cost concrete. The present study is concerned with replacing fine aggregates with glass powder (GP) at (0%, 15%, 30%, and 50%). It has studied the fresh and hardened properties (compressive strength, tensile strength, hardened density, and slump) for all the mentioned percent replacements. The findings have shown that all mixtures containing GP gave acceptable slump results within the design limits (2–5 cm) according… More >

  • Open Access

    ARTICLE

    The Adsorption of Pb(II) Using Silica Gel Synthesized from Chemical Bottle Waste: Optimization Using Box-Behnken Design

    Yatim Lailun Ni’mah*, Nabila Eka Yuningsih, Suprapto Suprapto
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025431
    Abstract The adsorption of Pb(II) on silica gel synthesized from chemical glass bottle waste has been studied. The effect of independent variables (adsorbent dose, initial concentration of Pb(II), contact time, and pH) on the Pb(II) removal from water was evaluated and optimized using the Response Surface Methodology (RSM). Under optimized conditions (adsorbent dose: 20 mg; contact time: 30 min; initial Pb(II) concentration: 120 mg. L−1 ; and pH: 8), the removal of Pb(II) was 99.77%. The adsorption equilibrium data obtained from the batch experiment were investigated using different isotherm models. The Langmuir isotherm model fits the experimental data. This shows that… More >

  • Open Access

    ARTICLE

    Hydrolysable Chestnut Tannin Extract Chemical Complexity in Its Reactions for Non-Isocyanate Polyurethanes (NIPU) Foams

    Elham Azadeh1, Antonio Pizzi1,2,*, Christine Gerardin-Charbonnier1,*, Philippe Gerardin1
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.027651
    Abstract Non-isocyanate polyurethane (NIPU) foams from a commercial hydrolysable tannin extract, chestnut wood tannin extract, have been prepared to determine what chemical species and products are taking part in the reactions involved. This method is based on two main steps: the reaction with dimethyl carbonate and the formation of urethane bonds by further reaction of the carbonated tannin with a diamine-like hexamethylene diamine. The hydroxyl groups on the tannin polyphenols and on the carbohydrates intimately linked with it and part of a hydrolysable tannin are the groups involved in these reactions. The carbohydrate skeleton of the hydrolysable tannin is also able… More >

  • Open Access

    ARTICLE

    Preparation and Performance of Pueraria lobata Root Powder/Polylactic Acid Composite Films

    Shuang Zhao1, Shenglan Chen2, Shuan Ren1, Gang Li3, Ke Song1,4, Jie Guo1,4, Shima Liu1,4, Jian He1,4, Xianwu Zhou1,4,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026066
    (This article belongs to this Special Issue: Polylactide Based Biopolymeric Systems)
    Abstract Petroleum-based materials, such as plastic, are characterized by adverse environmental pollution; as a result, researchers have sought alternative degradable plastics that are environmentally friendly, such as polylactic acid (PLA). PLA has shown great potential to replace petroleum-based plastics. In this study, seven different samples of unmodified Pueraria lobata root powder (PRP) with different contents (i.e., 0, 5, 10, 15, 20, 25, and 30 wt%) and three different modified PRPs (i.e., treated with NaOH, NaOH-KH-550, and Formic) were used to reinforce polylactic acid (PLA) via solution casting process. These prepared PRP/PLA composite films were characterized using SEM, FTIR, UV-visible spectra analysis,… More >

  • Open Access

    ARTICLE

    The Study on Bamboo Microfibers Isolated by Steam Explosion and Their Comprehensive Properties

    Qiushi Li1,2,#, Ronggang Luo1,2,#, Yu Chen3, Jinhui Xiong3, Bei Qiao1, Xijuan Chai1,2, Linkun Xie1,2, Juan Wang3, Lianpeng Zhang1,2,*, Siqun Wang4, Guanben Du1,2, Kaimeng Xu1,2,*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.026184
    Abstract To overcome the shortage of wood resources as well as to develop novel natural fibers materials, the Chimonobambusa quadrangularis (CQ) and Qiongzhuea tumidinoda (QT) planted in Southwest China were effectively isolated by the steam explosion (SE). The fine and uniform bamboo microfibers derived from CQ and QT were obtained, and their smallest average widths were 12.62 μm and 16.05 μm, respectively. The effects of steam explosion on the micro-morphology, chemical composition, thermal stability, crystallinity, surface wettability, and mechanical properties of bamboo microfibers were comprehensively investigated. The results showed that the relative content of cellulose in bamboo microfibers increased but the… More >

  • Open Access

    ARTICLE

    Experimental Mode and Vibration Comfort Analysis of High-Rise Glulam Building Floor Structure

    Yuhang He, Rongzhuo Zhang, Yifan Zhang, Zheng Wang*
    Journal of Renewable Materials, DOI:10.32604/jrm.2023.025867
    (This article belongs to this Special Issue: Bio-Composite Materials and Structures-2021)
    Abstract In order to better meet the objective requirements of the use safety of the high-rise glulam building floor structure and the living comfort of the residents, the transient excitation, environmental excitation and frequency spectrum identification methods were used to carry out experimental modal test in-site on the three rooms numbered A, B and C of the same glulam structural building. The three rooms have different functions, different floor sizes and different floor supporting structures. The research results have shown that the first-order bending frequency of the floor structure of Room A is 27.50 Hz, the transverse second-order bending frequency is… More >