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This work provides a new way of siloxane modification to improve the water-resistance, hydrophobicity, and thermal stability of bio-based waterborne polyurethane for potential application in painting, adhesives and inks. The modified films show highly water resistance which 72 h water absorption can be reduced to 1.94 % and the contact angle is up to 99.34o.
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  • Open Access

    REVIEW

    A Review of Recent Advances in Hybrid Natural Fiber Reinforced Polymer Composites

    Jorge Neto, Henrique Queiroz, Ricardo Aguiar, Rosemere Lima, Daniel Cavalcanti, Mariana Doina Banea*
    Journal of Renewable Materials, Vol.10, No.3, pp. 561-589, 2022, DOI:10.32604/jrm.2022.017434
    Abstract Natural fiber reinforced polymer composites (NFRCs) have demonstrated great potential for many different applications in various industries due to their advantages compared to synthetic fiber-reinforced composites, such as low environmental impact and low cost. However, one of the drawbacks is that the NFRCs present relatively low mechanical properties and the absorption of humidity due to the hydrophilic characteristic of the natural fibre. One method to increase their performance is hybridization. Therefore, understanding the properties and potential of using multiple reinforcement’s materials to develop hybrid composites is of great interest. This paper provides an overview of the recent advances in hybrid… More >

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    A Review of Recent Advances in Hybrid Natural Fiber Reinforced Polymer Composites

  • Open Access

    ARTICLE

    Enhanced Water Resistance Performance of Castor Oil—Based Waterborne Polyurethane Modified by Methoxysilane Coupling Agents via Thiol-Ene Photo Click Reaction

    Zhipeng He1,2, Junqi Xue1,2, Yanzi Ke1,2, Ying Luo1,2,*, Qiming Lu1,2, Yuehua Xu1,2, Chaoqun Zhang1,2,*
    Journal of Renewable Materials, Vol.10, No.3, pp. 591-604, 2022, DOI:10.32604/jrm.2022.017790
    Abstract Nowadays, waterborne polyurethanes (WPUs) prepared from renewable resources has attracted more and more attention. However, due to its structure, the prepared films easily swells in water and greatly affects the application range of WPUs. Therefore, solving the problem of water resistance is a way to improve the application range of WPUs. In this study, a series of WPU dispersions were prepared using castor oil as the bio-based polyol. Besides, the thiol-ene photo click reaction was carried out on the WPU films for silane modification. The effect of the silane modification on the chemical structures of the WPU dispersions and the… More >

    Graphic Abstract

    Enhanced Water Resistance Performance of Castor Oil—Based Waterborne Polyurethane Modified by Methoxysilane Coupling Agents via Thiol-Ene Photo Click Reaction

  • Open Access

    REVIEW

    Properties and Applications of Bamboo Fiber–A Current-State-of-the Art

    Chen Chen1,2, Haitao Li1,2,*, Assima Dauletbek1,2, Feng Shen3, David Hui4, Milan Gaff5, Rodolfo Lorenzo6, Ileana Corbi7, Ottavia Corbi7, Mahmud Ashraf8
    Journal of Renewable Materials, Vol.10, No.3, pp. 605-624, 2022, DOI:10.32604/jrm.2022.018685
    (This article belongs to this Special Issue: Bio-Composite Materials and Structures-2021)
    Abstract Fibers are used in many forms in engineering applications–one of the most common being used as reinforcement. Due to its renewable short natural growth cycle and abundance of bamboo resources, bamboo fiber has attracted attention over other natural fibers. Bamboo fiber has a complex natural structure but offers excellent mechanical properties, which are utilized in the textile, papermaking, construction, and composites industry. However, bamboo fibers can easily absorb moisture and are prone to corrosion limiting their use in engineering applications. Therefore, a better understanding of bamboo fiber is particularly important. This paper reviews all existing research on the mechanical characterization… More >

  • Open Access

    ARTICLE

    The Use of as Natural Coagulant in Algerian Drinking Water Treatment Plant

    Abderrezzaq Benalia1,2, Kerroum Derbal2,*, Amel Khalfaoui1, Antonio Pizzi3, Ghouti Medjahdi4
    Journal of Renewable Materials, Vol.10, No.3, pp. 625-637, 2022, DOI:10.32604/jrm.2022.017848
    Abstract The purpose of this work is the study the ability of the plant material Aloe vera to act as natural coagulant using raw water obtained from a drinking water treatment plant (Mila, Algeria). Different solvents such as: NaCl; NaOH and HCl were used as chemical activators to extract the active components from the Aloe vera plant, and different coagulation-flocculation experiments were conducted in a jar test apparatus to evaluate the performance of the extracted coagulant. Also, the effect of coagulant dose on some water parameters such as turbidity, pH, total alkalinity and organic matter were investigated. The results showed that… More >

    Graphic Abstract

    The Use of  as Natural Coagulant in Algerian Drinking Water Treatment Plant

  • Open Access

    ARTICLE

    A Soy Protein-Based Composite Film with a Hierarchical Structure Inspired by Nacre

    Yecheng Xu1, Chaojie Xu1, Mingsong Chen1, Jianzhang Li1, Ling Zeng2, Jing Luo3, Qiang Gao1,*, Sheldon Q. Shi4,*
    Journal of Renewable Materials, Vol.10, No.3, pp. 639-652, 2022, DOI:10.32604/jrm.2022.018509
    Abstract Soy protein-based composite film is a potential replacement for petroleum-based film with multipurpose applications and cleaner production. It is difficult to improve both the tensile strength and toughness of a protein-based film without sacrificing its elongation. In this study, inspired by the hierarchical structure of nacre, a facile yet delicate strategy was developed to fabricate a novel bio-based film with excellent toughness and high strength. Triglycidylamine (TGA) crosslinked soy protein (SPI) as hard phase and thermoplastic polyurethane elastomer (TPU) as soft phase comprise an alternative lay-up hierarchical structure. The interface of these two phases is enhanced using triglycidylamine (TGA) surface-modified… More >

  • Open Access

    REVIEW

    g-C3N4 Derived Materials for Photocatalytic Hydrogen Production: A Mini Review on Design Strategies

    Kai Su1,*, Shaoqi Deng1, Linxiao Li1, Qirui Qin1, Jingyu Yang1, Yan Chen2,3, Shengli Zhang1, Junming Chen1
    Journal of Renewable Materials, Vol.10, No.3, pp. 653-663, 2022, DOI:10.32604/jrm.2022.018556
    Abstract Hydrogen production through solar energy is one of the most important pathways to meet the growing demand of renewable energy, and photocatalyst participation in solar hydrolytic hydrogen production has received great attention in recent years in terms of low cost, high efficiency, and flexible design. Particularly, g-C3N4 (Graphitic-like carbon nitride material), as a unique material, can catalyze the hydrogen production process by completing the separation and transmission of charge. The easily adjustable pore structure/surface area, dimension, band-gap modulation and defect have shown great potential for hydrogen production from water cracking. In this review, the most recent advance of g-C3N4 including… More >

    Graphic Abstract

    g-C<sub>3</sub>N<sub>4</sub> Derived Materials for Photocatalytic Hydrogen Production: A Mini Review on Design Strategies

  • Open Access

    REVIEW

    A Comprehensive Review on Oxygen Reduction Reaction in Microbial Fuel Cells

    Pooja Dange1,#, Nishit Savla1,#, Soumya Pandit2,*, Rambabu Bobba3, Sokhee P. Jung4, Piyush Kumar Gupta2, Mohit Sahni5, Ram Prasad6,*
    Journal of Renewable Materials, Vol.10, No.3, pp. 665-697, 2022, DOI:10.32604/jrm.2022.015806
    (This article belongs to this Special Issue: New Insights on Nanomaterials for Energy, Environmental and Agricultural Applications)
    Abstract The focus of microbial fuel cell research in recent years has been on the development of materials, microbes, and transfer of charges in the system, resulting in a substantial improvement in current density and improved power generation. The cathode is generally recognized as the limiting factor due to its high-distance proton transfer, slow oxygen reduction reaction (ORR), and expensive materials. The heterogeneous reaction determines power generation in MFC. This comprehensive review describes-recent advancements in the development of cathode materials and catalysts associated with ORR. The recent studies indicated the utilization of different metal oxides, the ferrite-based catalyst to overcome this… More >

  • Open Access

    ARTICLE

    Finite Element Analysis on the Uniaxial Compressive Behavior of Concrete with Large-Size Recycled Coarse Aggregate

    Tan Li, Jianzhuang Xiao*, Amardeep Singh
    Journal of Renewable Materials, Vol.10, No.3, pp. 699-720, 2022, DOI:10.32604/jrm.2022.016898
    (This article belongs to this Special Issue: Recycled Concrete Towards a Sustainable Society)
    Abstract To model the concrete with complex internal structure of concrete with large sized aggregates the effect of internal structure on uniaxial compression behavior are studied. Large-sized recycled aggregates behave differently in the concrete matrix. To understand the influence on concrete matrix, a finite element model was developed to model recycled aggregate concrete composed of multiple randomly distributed irregular aggregates and cement mortar. The model was used to calculate the effect of large-size recycled coarse aggregate (LRCA) on the strength of recycled aggregate concrete and simulate the compressive strength of cubes and prisms. The factors such as the strength of new… More >

  • Open Access

    ARTICLE

    High Permeability of Boron along the Transverse Direction of Wood under High-Voltage Electrostatic Field (HVEF) Treatment

    Daiyuan Zhang1, Qian He2, Baocong Du2, Junbao Yu2,3, Xudong Zhu3, Dingyi Yang2, Shengcai Li2, Tianyi Zhan1, Liming Shen1,*, Zhiqiang Wang1,*, Xiaoning Lu1
    Journal of Renewable Materials, Vol.10, No.3, pp. 721-734, 2022, DOI:10.32604/jrm.2022.016793
    (This article belongs to this Special Issue: Advanced Wood Composites from Renewable Materials)
    Abstract Permeability of wood preservative is one of the most significant factors for protection of wood construction. Anisotropic flow permeability was involved in different directions of wood with higher flow resistance in the transverse and lower longitudinal directions. In this study, boron acid solution was brushed onto the tangential section of air-dried wood cubes and boron penetration along wood transverse direction was investigated under free diffusion, vacuum and HVEF treatments. Multi-scale boron distribution, FTIR measurement, leaching property, mechanical properties and fungistatic characteristic were investigated for free diffusion, vacuum and HVEF treated samples respectively. The results revealed that boron exhibited high permeability… More >

  • Open Access

    ARTICLE

    Development of Steel Slag-Based Solidification/Stabilization Materials for High Moisture Content Soil

    Yu Jia1, Sudong Hua1,*, Liying Qian2, Xiaojian Ren2, Jie Zuo3, Yanfang Zhang3
    Journal of Renewable Materials, Vol.10, No.3, pp. 735-749, 2022, DOI:10.32604/jrm.2022.016819
    (This article belongs to this Special Issue: New Trends in Sustainable Materials for Energy Conversion, CO2 Capture and Pollution Control)
    Abstract To solve the problems of high moisture content, high viscosity, and poor engineering mechanical properties of soil, this paper using with steel slag (SS) and desulfurization ash (DS) as initial raw materials, realizing the cooperative treatment of solid waste and solidification of silt soil. The synergistic utilization of SS and DS can reduce the production cost of curing agent and promote its own consumption. According to blended cement of various SS contents and inspected compressive strength performances, the most suitable raw materials ratio was selected. The best formula for this curing agent is cement:steel slag = 3:7 with 5% DS, and its… More >

  • Open Access

    ARTICLE

    Adsorption Properties and Cost of Dicarboxylic Nanocellulose on Copper Ions for Wastewater Treatment

    Xiaozheng Sun1,*, Yu Yang1, Qiang He2, Jianye Li1, Rui Li1, Haitao Chen1
    Journal of Renewable Materials, Vol.10, No.3, pp. 751-766, 2022, DOI:10.32604/jrm.2022.016933
    (This article belongs to this Special Issue: Nanocellulose and Nanocellulose-Derived Functional Materials-2021)
    Abstract The accumulation of Cu2+ in water is a potential threat to human health and environment. Dicarboxylic nanocellulose (DNC) with rich carboxyl groups was prepared through the NaIO4–NaClO2 sequential oxidation method to efficiently remove copper ions, and the Cu2+ adsorption properties and cost were studied. The maximum adsorption capacity reached 184.2 mg/g at pH 6 and an adsorbent dose of 5 g/L. Theoretically, the maximum adsorption capacities of monocarboxylic nanocellulose (MNC), DNC, and tricarboxylic nanocellulose (TNC) with carboxyl groups as the main adsorption sites were calculated to be 228.7, 261.3, and 148.1 mg/g, respectively. The Cu2+ adsorption costs of MNC, DNC, and TNC were… More >

    Graphic Abstract

    Adsorption Properties and Cost of Dicarboxylic Nanocellulose on Copper Ions for Wastewater Treatment

  • Open Access

    ARTICLE

    Lactoferrin-Conjugated Polylactic Acid Nanobubbles Encapsulated Perfluoropentane as a Contrast Agent for Ultrasound/Magnetic Resonance Dual-Modality Imaging

    Liqiong Ding1, Pingsheng Li2, Liu He1, Fengnan Xu1, Jieqiong Ding3,*, Binhua Luo1,*
    Journal of Renewable Materials, Vol.10, No.3, pp. 767-780, 2022, DOI:10.32604/jrm.2022.016903
    (This article belongs to this Special Issue: Polylactide Based Biopolymeric Systems)
    Abstract The development of contrast agents that can be activated by multiple modes is of great significance for tumor diagnosis. In this study, the lactoferrin (Lf)-conjugated polylactic acid (PLLA) nanobubbles (Lf-PLLA NBs) were used to encapsulate liquid perfluoropentane (PFP) with the double emulsion method, creating PFP loaded (PFP/Lf-PLLA) NBs for the ultrasound/magnetic resonance dual-modality imaging of subcutaneous tumor. The particle diameter and stability of nanobubbles were investigated by photon correlation spectroscopy. The biocompatibility of nanobubbles was preliminarily evaluated by cell proliferation and migration assay, hemolysis rate, and blood biochemistry analysis. A B-mode clinical ultrasound real-time imaging system was used to perform… More >

  • Open Access

    ARTICLE

    Drag Reduction Characteristics of Microstructure Inspired by the Cross Section of Barchan Dunes under High Speed Flow Condition

    Jiawei Jiang, Yizhou Shen*, Jie Tao*, Zhenfeng Jia, Xinyu Xie, Chaojiao Zeng
    Journal of Renewable Materials, Vol.10, No.3, pp. 781-797, 2022, DOI:10.32604/jrm.2022.017230
    (This article belongs to this Special Issue: Computational Tools for Renewable Materials)
    Abstract A new type of microstructure inspired by the cross section of barchan dunes was proposed to reduce windage, which was considered as a passive drag reduction technology in aerospace manufacturing field. Computational fluid dynamics method was carried out to discuss the effect of the microstructure on the skin friction reduction under high velocity flow condition. Different microstructure heights were employed to survey the reduction of drag. The results illustrated that the appearance of microstructure led to a generation of pressure drag in non-smooth model (with microstructures inspired by cross section of barchan dune) in contrast to smooth model. However, the… More >

    Graphic Abstract

    Drag Reduction Characteristics of Microstructure Inspired by the Cross Section of Barchan Dunes under High Speed Flow Condition

  • Open Access

    ARTICLE

    Recycled Aggregate Pervious Concrete: Analysis of Influence of Water-Cement Ratio and Fly Ash under Single Action and Optimal Design of Mix Proportion

    Shoukai Chen1,4,5, Chunpeng Xing1, Mengdie Zhao2,*, Junfeng Zhang3, Lunyan Wang1,4,5,*, Qidong He6
    Journal of Renewable Materials, Vol.10, No.3, pp. 799-819, 2022, DOI:10.32604/jrm.2022.017285
    (This article belongs to this Special Issue: Recycled Concrete Towards a Sustainable Society)
    Abstract

    Pervious concrete is recommended, which is of great benefit to the ecological environment and human living environment. In this paper, the influences of five water-cement ratios and four fly ash contents to replace the cement by mass with a water-cement ratio of 0.30 on the properties of Recycled Aggregate Pervious Concrete (RAPC) were studied. Following this, based on the Grey relational-Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) optimization method, the strength, permeability, abrasion loss rate, and material costs of RAPC were adopted as evaluation indices to establish a mix proportion optimization model. The results show that… More >

  • Open Access

    ARTICLE

    Conductive Polymer Composites Fabricated by Disposable Face Masks and Multi-Walled Carbon Nanotubes: Crystalline Structure and Enhancement Effect

    Meng Xiang1, Zhou Yang1, Jingjing Yang1, Tong Lu1, Danqi Wu1, Zhijun Liu1, Rongjie Xue1, Shuang Dong2,*
    Journal of Renewable Materials, Vol.10, No.3, pp. 821-831, 2022, DOI:10.32604/jrm.2022.017347
    (This article belongs to this Special Issue: Plastic waste management towards a sustainable future)
    Abstract Influenced by recent COVID-19, wearing face masks to block the spread of the epidemic has become the simplest and most effective way. However, after the people wear masks, thousands of tons of medical waste by used disposable masks will be generated every day in the world, causing great pressure on the environment. Herein, conductive polymer composites are fabricated by simple melt blending of mask fragments (mask polypropylene, short for mPP) and multi-walled carbon nanotubes (MWNTs). MWNTs were used as modifiers for composites because of their high strength and high conductivity. The crystalline structure, mechanical, electrical and thermal enhancement effect of… More >

  • Open Access

    ARTICLE

    Green Method, Optical and Structural Characterization of ZnO Nanoparticles Synthesized Using Leaves Extract of M. oleifera

    José Vulfrano González-Fernández1,*, Diego David Pinzón-Moreno1, Antony Alexander Neciosup-Puican2, María Verónica Carranza-Oropeza1
    Journal of Renewable Materials, Vol.10, No.3, pp. 833-847, 2022, DOI:10.32604/jrm.2021.017377
    (This article belongs to this Special Issue: Current Advances in Green Nanomaterials Applications)
    Abstract ZnO nanoparticles (ZnO-NP) present innovative optical, electrical, and magnetic properties that depend on specific characteristics, e.g., size, distribution, and morphology. Thus, these properties are essential to address various applications in areas such as electronics, medicine, energy, and others. In addition, the performance of this ZnONP depends of their preparation which can be done by chemical, physical, and biological methods. Meanwhile, nowadays, the main interest in developing ZnO-NP synthesis through biological methods bases on the decrease of use of toxic chemicals or energy applied to the procedures, making the process more cost-effective and environmentally friendly. However, the large-scale production of nanoparticles… More >

  • Open Access

    ARTICLE

    Analysis of Crack Expansion and Morphology of Cross-Laminated Timber Planar Shear Test

    Yujie Huang1, Yifan Zhang1, Zheng Wang1,*, Assima Dauletbe2, Yao Lu1, Zhaoyu Shen1
    Journal of Renewable Materials, Vol.10, No.3, pp. 849-870, 2022, DOI:10.32604/jrm.2022.018515
    (This article belongs to this Special Issue: Advanced Wood Composites from Renewable Materials)
    Abstract To describe the dynamic cracking process of the CLT vertical layer, the correlation between a load-displacement curve, specimen cracking, and planar shear failure mechanism of the CLT were explored. A three-point bending test and an improved planar shear test are used to evaluate the shear performance of the CLT. In this study, the load-displacement curve is recorded, the experimental part is synchronized with the video, the dynamic process of cracking of the vertical layer is observed and analyzed throughout the test. From the load-displacement curve, the image characteristics of the initial cracking and the sudden increase of the cracking of… More >

    Graphic Abstract

    Analysis of Crack Expansion and Morphology of Cross-Laminated Timber Planar Shear Test

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