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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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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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 >
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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 >
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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 >
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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 >
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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 >
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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 >
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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 >
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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 >
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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 >
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