Black liquor, abundant waste from paper industry and sodium alginate, were employed as renewable precursors to prepare magnetically monolithic hierarchically porous carbons in a facile manner. The resulting monoliths possessed interconnected micro/macroporous structure, strong magnetic properties, high mechanical stability, and show good adsorption performance for removal of lead ions with good recyclability.
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Xinyi Chen1,2, Antonio Pizzi1,*, Xuedong Xi1,2, Xiaojian Zhou2, Emmanuel Fredon1, Christine Gerardin3
Journal of Renewable Materials, Vol.9, No.6, pp. 1045-1057, 2021, DOI:10.32604/jrm.2021.015066
（This article belongs to this Special Issue: Renewable and Biosourced Adhesives)
Abstract Soy-protein isolate (SPI) was used to prepare non-isocyanate polyurethane (NIPU) thermosetting adhesives for
wood panels by reacting it with dimethyl carbonate (DMC) and hexamethylene diamine. Both linear as well
as branched oligomers were obtained and identified, indicating how such oligomer structures could further
cross-link to form a hardened network. Unusual structures were observed, namely carbamic acid-derived
urethane linkages coupled with lactam structures. The curing of the adhesive was followed by thermomechanical
analysis (TMA). It appeared to follow a two stages process: First, at a lower temperature (maximum 130°C), the
growth of linear oligomers occurred, finally forming a physically entangled network.… More >
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Parichart Onsri1, Decha Dechtrirat2,3,4, Patcharakamon Nooeaid5, Apiluck Eiad-ua6, Pongsaton Amornpitoksuk1,7, Supanna Techasakul4, Ahmad Taufiq8, Laemthong Chuenchom1,7,*
Journal of Renewable Materials, Vol.9, No.6, pp. 1059-1074, 2021, DOI:10.32604/jrm.2021.013362
（This article belongs to this Special Issue: Renewable materials for sustainable development)
Abstract The novel and facile preparation of magnetically interconnected micro/
macroporous structure of monolithic porous carbon adsorbent (MPCA) were
designed and presented herein. The synthesis was achieved via conventional
freeze-drying and pyrolysis processes. In this study, sodium alginate and wasted
black liquor were employed as starting precursors. Sodium alginate acts as a template
of materials, whereas black liquor, the wasted product from the paper industry with
plentiful of lignin content and alkaline solution, played an essential role in the reinforcement and activation of porosity for the resulting materials. Moreover, both the
precursors were well dissolved in Fe3+ solution, providing a simple… More >
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Yi Long1,#,* , Chunling Zhang2,#,*, Lan Chen3,#, Tietao Di2, Lu Chen2, Lisha Tang2, Kaizhong Luo2, Yu Yan1, Pingzhen Tong2, Jie Xiang4
Journal of Renewable Materials, Vol.9, No.6, pp. 1075-1085, 2021, DOI:10.32604/jrm.2021.014555
（This article belongs to this Special Issue: Current Advances in Green Nanomaterials Applications)
Abstract In our previous study, silver nanoparticles were prepared using AgNO3 and carboxymethyl chitosan (CMCS)
which is commercially available with solar irradiation. In this study, the efficacy and safety of silver nanoparticles
prepared by this method were evaluated for healing wounds in rats with diabetes. We also attempted to determine
the underlying mechanism and influencing factors of the silver nanomaterial preparation method. Compared with
growth factors, silver nanoparticles exhibit better healing effects for rats with diabetes. No remnant silver ions
were detected in the major organs of these rats after the application of silver nanoparticles. Silver nanoparticles
prepared using CMCS are… More >
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Budhi Priyanto1,2,*, Retno Asih1, Irma Septi Ardiani1, Anna Zakiyatul Laila1, Khoirotun Nadiyyah1, Bima Romadhon3, Sarayut Tunmee4, Hideki Nakajima4, Triwikantoro1, Yoyok Cahyono1, Darminto1,*
Journal of Renewable Materials, Vol.9, No.6, pp. 1087-1098, 2021, DOI:10.32604/jrm.2021.014466
（This article belongs to this Special Issue: New Trends in Sustainable Materials for Energy Conversion, CO2 Capture and Pollution Control)
Abstract A simple, highly reproducible, and environmentally friendly method is a considered approach in generating renewable energy materials. Here, hydrogenated amorphous carbon (a-C) films have been successfully prepared from palmyra liquid sugar, employing spin-coating and spraying methods. Compared with the former method, the latter shows a significance in producing a better homogeneity in particle size and film thickness. The obtained films have a thickness of approximately 1000 to 100 nm and contain an sp2 hexagonal structure (~70%) and sp3 tetrahedral configuration (~30%) of carbons. The introduction of boron (B) and nitrogen (N) as dopants has created the local structural modification of… More >
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Ling Pan1 , Yubo Tao2,*, Peng Li1,2,*
Journal of Renewable Materials, Vol.9, No.6, pp. 1099-1109, 2021, DOI:10.32604/jrm.2021.014683
（This article belongs to this Special Issue: Renewable Material from Agricultural Waste and By-Product and Its Applications)
Abstract As a kind of biopolymer, hydrolysates of fish swim bladder, safer than those of land mammals, are widely used in
food, cosmetics as well as pharmaceutical and biomedical fields for their biocompatibility, biodegradability, and
weak antigenicity. To enhance hydrolysate production, in this paper, the papain and alcalase hydrolysis processes
of larimichthys polyactis swim bladder were optimized with orthogonal experiments. With 89.5% hydrolysate yield,
the optimal processing conditions for alcalase were solid-liquid ratio of 1:30, enzyme concentration of 0.7%, and
extraction time of 6 h. As for papain, under the optimal processing conditions: solid-liquid ratio of 1:20, enzyme
concentration of 0.5%,… More >
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Hongmin Li1,*, Hongxing Qiu2, Wenbo Wang3
Journal of Renewable Materials, Vol.9, No.6, pp. 1111-1125, 2021, DOI:10.32604/jrm.2021.014722
Abstract The mortise-tenon joint is an important hub transmitting and distributing external loads for load-bearing components (beams, columns et al.) in the ancient-timber frame structure system. However, the conventional steel
hoop reinforcement methods often insert wood screws into the timber components. When the reinforced joint
rotates greatly, the anchoring failure of the screws will cause damage to the timber joint. To solve this problem,
this study proposes a detachable and replaceable non-destructive flat-steel jacket reinforcement method in which
horizontal flat steel is placed in the center of the joint, and the bolt is extended to the outside of the timber beam.… More >
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Ewa Szefer*, Agnieszka Leszczyńska, Edyta Hebda, Krzysztof Pielichowski
Journal of Renewable Materials, Vol.9, No.6, pp. 1127-1142, 2021, DOI:10.32604/jrm.2021.014584
（This article belongs to this Special Issue: Nanocellulose and Nanocellulose-Derived Functional Materials)
Abstract The aim of this work was to use cellulose nanocrystals that were obtained by hydrolysis in phosphoric acid solution and further modified with succinic anhydride in the microwave field for PLA reinforcement. A series of all-bionanocomposites containing unmodified and surface modified cellulose nanocrystals with CNC content in the range of 1–3 %w.t. were obtained by melt blending and tested by XRD, SEM, DSC and DMA to investigate the effect of surface esterification of CNCs on the structure, morphology, dynamic mechanical properties of bionanocomposites, as well as phase transitions of PLA in the presence of cellulosic nanofiller. DMA investigations showed the… More >
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Yiwei Xuan1,3, Haitao Li1,*, Zhemin Bei1, Zhenhua Xiong2, Rodolfo Lorenzo4, Ileana Corbi5, Ottavia Corbi5
Journal of Renewable Materials, Vol.9, No.6, pp. 1143-1156, 2021, DOI:10.32604/jrm.2021.015292
（This article belongs to this Special Issue: Renewable building materials and properties)
Abstract This research studied the ultimate bearing capacity of laminated bamboo lumber (LBL) unit and thereby calculated the maximum bending moment. The load-displacement chart for all specimens was obtained. Then the flexural capacity of members with and without bamboo nodes in the middle section was coMPared. The bending
experiment phenomenon of LBL unit was concluded. Different failure modes of bending components were analysed and concluded. Finally, the bending behaviour of LBL units is coMPared with other bamboo and timber
products. It is shown that the average ultimate load of BS members is 866.1 N, the average flexural strength is
101 MPa,… More >
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Zhihang Wang1,*, Jinyu Xu1,2, Xin Meng1, Conigjin Zhu1
Journal of Renewable Materials, Vol.9, No.6, pp. 1157-1168, 2021, DOI:10.32604/jrm.2021.014878
Abstract In this paper, the specimens of polymer-cement composites after 1 d, 7 d, 15 d, and 30 d aging without aging and
UV aging are subjected to fixed extension test and tensile test. By observing the mode of the composite in the
fixed-elongation test, and measuring the elastic recovery rate, tensile strength, elongation at break, peak tensile
strain, tensile toughness and pre-peak tensile toughness of the composite, the effects of UV aging on the bonding
and the tensile properties of the composite were studied. And combining with scanning electron microscopy
experiments, the micro-mechanism of the effect of ultraviolet aging on… More >
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Xinzhan Chen1, Xiangqing Kong1,2,*, Ying Fu2,*, Wanting Sun1, Renguo Guan2
Journal of Renewable Materials, Vol.9, No.6, pp. 1169-1188, 2021, DOI:10.32604/jrm.2021.014809
（This article belongs to this Special Issue: Recycled Concrete Towards a Sustainable Society)
Abstract This paper experimentally investigated the flexural behavior of reinforced recycled aggregate concrete (RAC) beams reinforced with glass fiber-reinforced polymer (GFRP) bars. A total of twelve beams were built and tested up to failure under four-point bending. The main parameters were reinforcement ratio (0.38%, 0.60%, and 1.17%), recycled aggregate replacement ratio (R = 0, 50%, and 100%) and longitudinal reinforcement types (GFRP and steel). The flexural capacity, failure modes, flexibility deformation, reinforcement strains and crack distribution of the tested beams were investigated and compared with the calculation models of American code ACI 440.1-R-15, Canadian code CSA S806-12 and ISIS-M03-07. The tested… More >
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