The work presented shows for the first time that at a higher temperature such as 80°C, on top of the known interactions tannin/collagen in leather, there are also a number of covalent linkages and cross-linking of the collagen protein by reaction of the vegetable tannin with the side chains of amino acids carrying –NH2 and –COOH groups most likely contributing to both leather stability and leather shrinkage.
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Antonio Pizzi*
Journal of Renewable Materials, Vol.9, No.8, pp. 1345-1364, 2021, DOI:10.32604/jrm.2021.015663
Abstract Collagen powder hydrolysates were reacted with a solution of commercial mimosa bark tannin extract. The mixture was prepared at ambient temperature and prepared at 80°C to determine what reactions, if any, did occur
between the collagen protein through its amino acids and the polyphenolic condensed tannin. The reaction products obtained were analyzed by matrix assisted laser desorption ionization time-of-flight (MALDI ToF) mass
spectrometry. Reactions between the two materials did appear to occur, with the formation of a relatively small
proportion of covalent and ionic linkages at ambient temperature but a considerable proportion of covalent linkages tannin-protein amino acids and the… More >
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ARTICLE
Yangling Li1, Zhengrong Li1, Hui Yu1, Gang Huang1, Xiaopeng Pei2, Kun Xu2,*, Pixin Wang2, Ying Tan3,*
Journal of Renewable Materials, Vol.9, No.8, pp. 1365-1376, 2021, DOI:10.32604/jrm.2021.014909
（This article belongs to this Special Issue: Biomass-Derived Functional Hydrogels)
Abstract In this work, the –catechol and –thiol modified starch was prepared by the esterification and amino condensation
reaction, then a fully starch based hydrogel was prepared via the thiol-catechol Michael addition reaction. The
starch hydrogel gained shape memory behaviors by coordinate with Fe3+ ions at alkaline condition. 1
H-NMR
had been used to character the structure of the starch derivatives and its character peaks. The hydrogel’s modulus
had also been measured before and after coordinating with Fe3+ ions in linear area and the result showed that
both the hydrogel’s storage modulus and loss modulus kept constant in linear area from… More >
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ARTICLE
Xiao Han1, Zhaodi Wu1, Yi Yang1, Jian Guo1, Yaning Wang2, Lu Cai3, Wendong Song4, Lili Ji2,*
Journal of Renewable Materials, Vol.9, No.8, pp. 1377-1391, 2021, DOI:10.32604/jrm.2021.015076
（This article belongs to this Special Issue: Renewable Material from Agricultural Waste and By-Product and Its Applications)
Abstract In this study, a porous biochar material derived from waste crab shell was prepared by one-step hydrothermal carbonization and acetic acid activation method at 180°C, which was characterized by SEM, BET, XRD and FTIR. The results show that the as-prepared crab shell biochar (CSB) exhibits a fluffy irregular layered structure with abundant pores and oxygen-containing functional groups, which can facilitate the adsorption of diesel using CSB. In addition, batch adsorption experiments had been performed, effects of initial diesel concentration, adsorption time, adsorbent dosage and pH on the diesel adsorption using CSB were analyzed, which could be observed that CSB has… More >
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ARTICLE
Nguyen Thi Thanh Thuy1,*, Le Hoang Huy1, Truong Thuy Vy1, Nguyen Thi Thanh Tam2, Bien Thi Lan Thanh1, Nguyen Thi My Lan3
Journal of Renewable Materials, Vol.9, No.8, pp. 1393-1411, 2021, DOI:10.32604/jrm.2021.015772
（This article belongs to this Special Issue: Food Packaging Materials Based on Renewable Resources)
Abstract In the present study, the biogenic silver nanoparticles have been synthesized using aqueous leaf extract of Plectranthus amboinicus (PA), which acted as both reducing and stabilizing agents. The PA synthesized silver nanoparticles were blended with carboxymethyl cellulose/polyvinyl alcohol (CMC/PVA) biocomposite. The prepared AgNPs as well as the biogenic AgNPs incorporated CMC/PVA films were investigated using UV-visible spectrophotometry, Fourier-transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS), scanning electron microscope (SEM), and X–ray diffraction (XRD). The DLS results showed that biogenic AgNPs had the average particle size of 65.70 nm with polydispersity index of 0.44. The surface plasmon resonance of AgNPs, which… More >
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Tao Li1,2,*, Sheliang Wang2, Fan Xu2,*, Binbin Li3, Bin Dang1, Meng Zhan4, Zhiqi Wang5
Journal of Renewable Materials, Vol.9, No.8, pp. 1413-1432, 2021, DOI:10.32604/jrm.2021.012744
（This article belongs to this Special Issue: Recycled Concrete Towards a Sustainable Society)
Abstract To improve the resource utilization of recycled aggregate concrete (RAC) and make use of the unique pozzolanic
activation characteristics of iron ore tailing (IOT), the constitutive curves of tailing recycled concrete (TRC)
before and after carbonization were analyzed theoretically, experimentally and microscopically. Firstly, according
to the experimental data, the damage constitutive and related damage parameters of TRC were theoretically established by Weibull probability distribution function. Secondly, the comprehensive damage parameter b under different working conditions was studied. Finally, the damage mechanism was formed by EDS and SEM. The results
showed that the damage constitutive model based on Weibull probability distribution… More >
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Man Yuan, Lu Hong, Zehui Ju, Wenli Gu, Biqing Shu, Jianxin Cui, Xiaoning Lu*, Zhiqiang Wang*
Journal of Renewable Materials, Vol.9, No.8, pp. 1433-1445, 2021, DOI:10.32604/jrm.2021.015040
（This article belongs to this Special Issue: Renewable building materials and properties)
Abstract In this study, the effects of three different particle sizes of wood wastes (A = –8 + 12 mesh; B = –12 + 20 mesh; C = –20 + 30 mesh) and factory shavings (D) on the properties of particleboard were investigated. According to the test results, three-layer particleboard was designed. Particleboard face layers made with mixture of A, B, and C. The core layer made with D. The ratio of core layer to face layers is 50:50. Three-layer particleboard were fabricated with 12% urea-formaldehyde (UF) resins and three different high voltage electrostatic field intensities (0 kv, 30 kv, 60… More >
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Zheng Cao1,2,3,4,*, Yang Zhang2, Keming Luo2, Yinqiu Wu2, Hongxin Gao2, Junfeng Cheng2,*, Chunlin Liu2,3, Guoliang Tao2, Qingbao Guan1, Lei Zhang5
Journal of Renewable Materials, Vol.9, No.8, pp. 1447-1462, 2021, DOI:10.32604/jrm.2021.015593
（This article belongs to this Special Issue: Biomass-Derived Functional Hydrogels)
Abstract
The preparation and application of functional hydrogels based on natural polysaccharides have always been a hot research topic. In this study, using acrylamide (AM) monomer, N, N'-methylene bisacrylamide (MBA) as cross-linking agent, potassium persulfate (K2S2O8) as initiator, in the presence of natural polysaccharide sodium alginate (SA), the PAM/SA hydrogel was prepared by free radical polymerization. Fourier transform infrared spectroscopy (FT-IR), swelling performance tests, scanning electron microscope (SEM), thermogravimetric analysis (TGA), UV-visible spectrophotometer, mechanical property measurements were carried out to analyze the composition, morphology, and performance of the hydrogels. The swelling behavior, dye adsorption performance, and the mechanical properties of PAM/SA… More >
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ARTICLE
Neeti Gandhi1,3, Nicholas Farfaras2, Nien-Hwa Linda Wang3, Wan-Ting Chen2,*
Journal of Renewable Materials, Vol.9, No.8, pp. 1463-1483, 2021, DOI:10.32604/jrm.2021.015529
（This article belongs to this Special Issue: Plastic waste management towards a sustainable future)
Abstract Increasing production and use of various novel plastics products, a low recycling rate, and lack of effective recycling/disposal methods have resulted in an exponential growth in plastic waste accumulation in landfills and in the environment. To better understand the effects of plastic waste, Life Cycle Analysis (LCA) was done to compare the effects of various production and disposal methods. LCA shows the specific effects of the cradle-to-grave or cradle-to-cradle scenarios for landfill, incineration, and mechanical recycling. The analysis clearly indicates that increasing recycling of plastics can significantly save energy and eliminate harmful emissions of various carcinogens and GHGs into the… More >
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ARTICLE
Alper Aytekin1,*, Hikmet Yazıcı2
Journal of Renewable Materials, Vol.9, No.8, pp. 1485-1501, 2021, DOI:10.32604/jrm.2021.015768
（This article belongs to this Special Issue: Research and Innovations in Engineered Timber and Mass Timber Products for Sustainable Built-Environment)
Abstract The objective of this study was to evaluate the effect of heat treatment on decorative properties including glossiness, color coordinates including lightness (L), blue-yellow (b*) and red-green (a*), hardness (shore-D) morphological characterization and thermal properties of some exotic wood species. Heat treatment of anigre (Aningeria altissima), cedrorana (Cedrelinga catenaeformis), cemara (Casuarina sumatrana) and coronilla (Scutia buxifolia) wood materials were performed in an oven with a programmable controller at 210°C for 3 h. The obtained samples were conditioned in a climate cabin and the decorative properties, morphological characterization with scanning electron microscopy (SEM) and thermal properties with thermogravimetric analyzer (TGA) of… More >
Graphic Abstract
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ARTICLE
Zhiyu Weng1, Lina Wang1,2,*, Qiang Liu2, Xuemin Pan1, Yonghao Xu3, Jing Li1
Journal of Renewable Materials, Vol.9, No.8, pp. 1503-1517, 2021, DOI:10.32604/jrm.2021.015003
（This article belongs to this Special Issue: Renewable and Biosourced Adhesives)
Abstract To explore an environmentally friendly improvement measure for red clay, the function and mechanism of
xanthan gum biopolymer and polypropylene fibers on the strength properties of red clay were investigated by
unconfined compressive strength and scanning electron microscopy tests. The test results demonstrated that
the contents and curing ages of xanthan gum had significant influences on the unconfined compressive strength
of red clay. Compared with untreated soil, 1.5% xanthan gum content was the optimal ratio in which the strength
increment was between 41.52 kPa and 64.73 kPa. On the other hand, the strength of xanthan gum-treated red
clay increased, whereas… More >
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