JOURNAL OF APPLIED POLYMER SCIENCE
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2014
·Vol. 132
·期 13
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IF 1.64
Chongyi Li,Feng Xue,Enyong Ding
This is probably the first report on the synthesis of a series of novel collagen-based flocculants (CP11, CP12, and CP13) by grafting polyacrylamide (PAM) chains onto the collagen backbone, which was directly extracted from leather shavings via alkali hydrolysis. The results from FTIR, XRD, 1 H NMR, and TGA well supported that PAM chains had been successfully grafted onto collagen backbone. In addition, the micrographs of SEM revealed that the PAM grafted collagen possessed much more porous and looser surface structures in comparison with virgin collagen. Zeta potential measurement showed that the introduction of branched PAM chains helped to improve the positively charge density. Furthermore, CP12 performed the best in the kaolin flocculation with the highest flocculation rate about 24%·min −1 and could induce the generation of much larger and denser floccs for the fast settling of kaolin particles. The corresponding flocculation mechanism was also presented by analyzing the collected flocs. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41556.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Qijue Chen,Yumeng Wang,Xiangning Wu,Zhuoer Jiang,Boxian Zhang,Mǎdǎlina Georgiana Albu Kaya,Kheng Lim Goh,Keyong Tang
There is a growing interest in the utilization of animal by-products and wastes. Plant-derived enzymes could play a vital role in collagen extraction from tannery-trimming wastes. Here, the ficin enzyme from fig leaves was used for collagen extraction and compared with conventional acetic acid and pepsin extraction methods, aiming to assess the efficiency and purity of collagen extracted using this plant-based enzyme approach relative to the organic solvents and animal-derived enzymes. The extracted collagen was identified as type I collagen. Response surface methodology analysis revealed that the ficin enzyme-soluble collagen yielded 15.28 % at a hydrolysis time of 39.27 h, a ficin enzyme dose of 5.54 %, and a mixing ratio of 15.87, higher than the acetic acid-soluble collagen yield of 9.52 % and pepsin enzyme-soluble collagen yield of 14.56 %. Ficin enzyme-soluble collagen exhibited better integrity of the triple helical structure with fewer proteinaceous impurities, though it showed poorer thermal stability. Ultrasound treatment at 800 W for 30 min did not significantly disrupt the triple helical structure of collagen. The work aims to develop a green and sustainable method for extracting collagen from tannery-trimming wastes, offering a novel approach for the high-value conversion of animal by-products and agro-residues wastes.
研究领域:
生物化学
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环境科学
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可持续发展
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 40
·45363
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IF 1.86
Chongyi Li,Hongguang Liao,Xiang Zhang,Xiaoguang Yu,Mengliang Tong
A series of novel cationic flocculants are designed and synthesized successfully by grafting two monomers onto the collagen backbone, namely acrylamide (AM) and 2-methacryloyloxyethyltrimethyl ammonium chloride (DMC). Apparently, these effective grafting modifications are well demonstrated by adopting FTIR and H 1 NMR measurements, which could be used to estimate grafting ratios of corresponding monomers approximately. Additionally, significant improvements in positive charge densities and amorphous aggregation structures are also definitely confirmed by Zeta and XRD measurements, respectively. Moreover, thermogravimetric analysis clearly proves the formation of cationic branched chain architectures, whose maximum thermal degradation temperature would significantly decrease with the introduction of AM. In addition, much more porous and rougher surface structures could be visibly observed after successful grafting modifications. Furthermore, when the feeding weight ratio between collagen and DMC is controlled at 1:3, or the equal amounts of AM and DMC are introduced meanwhile the mass ratio between collagen and mixed monomers (DMC + AM) is fixed at 1:4, the samples acquired could both perform the best in decolorizing the model wastewater containing methyl orange (MO) dyes in their groups, and hereby, a corresponding flocculation mechanism is also proposed based on the structural analysis of the formed flocs. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45363.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Xiaoyu Li,Chao Lei,Junyu Wan,Weixing Xu,Jianfei Zhou,Bi Shi
Leather shavings are generated as solid waste in the leather industry and may cause environmental pollution if not disposed judiciously. These solid wastes, primarily composed of collagen fibers (CFs), can be recycled as biomass composites. However, CFs are incompatible with natural rubber (NR) due to its hydrophilicity. Conventionally, the compatibility has been improved by utilizing silane coupling agents (SCAs) along with a large number of organic solvents, which further contribute to environmental pollution. In this study, we developed a novel complex coupling agent (CCA) to enhance the compatibility between CF and NR. The CCA was synthesized through a coordination reaction between Cr(III) and α-methacrylic acid (MAA). Cr(III) in the coupling agent coordinates with the active groups in CFs, while the unsaturated double bonds in MAA facilitate covalent crosslinking between the CCA and NR, improving compatibility. The coordination bonding between CF and NR exhibits strong interfacial interaction, endowing the composites with desirable mechanical properties. Moreover, the proposed method is an economical and green approach that can be used to synthesize CF-based composites without requiring organic solvents. Herein, a strategy promoted sustainable development in the leather industry has been established.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
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2023
·Vol. 30
·期 1
·130-141
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IF 2.7
Yunjia Wang,Qifeng Chen
The reuse of leather waste is a global challenge because of the increase of leather products. In this paper, collagen fiber (CF) was extracted from leather waste and polyvinyl alcohol (PVA) gel membranes containing CF with high mechanical property are fabricated by freeze–thaw method. Results shows that the composite gel membrane maintains the helical structure of CF. The tensile strength of the PVA/3CF-FW increases to 58.5 MPa, while its elongation at break increases to 365%. The swelling ratio increases with the addition of CF, and the PVA/7CF composite gel membrane has the highest swelling ratio, which is 11.65. However, the crystallinity reduced with the addition of CF. Compared to the pure 24PVA gel membrane and the PVA/GA gel membrane, the PVA/CF composite gel membrane prepared by freeze–thaw method has a better mechanical property. Highlights Taking leather waste as raw material to extract collagen fiber. The gel membranes containing collagen fiber have hardly been reported. The gel membranes show good swelling ratio and mechanical properties.
研究领域:
材料科学
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生物工程
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Mao Yang,Lang Rui,Yuhan Lu,Wenjia Han,Xugang Dang
Functional papermaking additives have tremendous potential for application in multipurpose paper. In this research, a functional paper internal sizing agent based on waterborne polyurethane-grafted collagen hydrolysate (WPUC) was first prepared via free-radical emulsion polymerization of vinyl monomer-modified collagen hydrolysate and waterborne polyurethane (WPU). Then, the prepared WPUC was used as an internal sizing agent for sustainable processing and manufacturing of the handsheets. FTIR, XRD, DSC, and other analytical techniques were used to characterize the behavior and effects of WPUC internal sizing on the handsheets. The research found that the tensile coefficient, the tear coefficient, the folding resistance, and Cobb60 of the handsheets reached 55.8 N.m.g–1, 1.9 mN.m2.g–1, 12 times, and 190 g/m2, respectively, when the WPUC sizing agent was 2% in the pulp. In addition, when the precipitated calcium carbonate (PCC) and WPUC were incorporated in the pulp, the retention rate of PCC could be greatly increased without affecting the mechanical properties of the finished paper. Specifically, when the PCC dosages were 25 and 50% in the papermaking, the PCC retention rate of handsheets with the WPUC sizing agent increased correspondingly by 139.2 and 174.5%, respectively. Moreover, the handsheets had good water resistance. The results indicate that the WPUC is expected to be used as a novel paper internal sizing agent to further improve the paper performance as well as lower the production costs.
研究领域:
材料科学
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环境科学
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造纸工程
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DOI
高影响因子
Materials Advances
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2022
·Vol. 3
·期 12
·5080-5086
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IF 0
Lingyan Li,Jian Zhang,Manting Wang,Jiaqi Zhang,Xiao-Fei Zeng,Jie-Xin Wang,Yuan Le
Triboelectric nanogenerators (TENGs) have become a research hotspot as feasible energy harvesters because they can efficiently convert mechanical energy into electrical output for energy supply, showing advantages in micro-scale energy harvesting for applications in portable devices. Herein, we employed collagen extracted from leather shavings to fabricate an all-nanofiber bio-TENG via a cost-effective electrospinning technique. By optimizing the spinning parameters, flexible and stretchable collagen/PVA/Ag NW composite nanofiber films were successfully fabricated. The as-prepared film exhibited remarkable antibacterial activity and biocompatibility. The designed bio-TENG, using a collagen-based film and an electrospun PVDF film as the top and bottom triboelectric layers, displayed excellent electrical output performance benefiting from the rougher surface and high porosity of the contact surface. The bio-TENG can serve as a reliable power source to drive lower-power electronics. This research provides a simple and economical strategy to utilize the waste biomaterial for the construction of the bio-TENG and proposes a promising idea in the design of mechanical energy harvesters to supply low-power devices.
研究领域:
材料科学
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生物医学工程
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能源技术
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DOI
RSC Advances
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2017
·Vol. 7
·期 7
·4024-4029
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IF 3.108
Jianfei Zhou,Teng Xu,Xiaoling Wang,Chang Liu,Xuepin Liao,Xin Huang,Bi Shi
A low-cost and water resistant biomass adhesive, collagen hydrolysate–silane coupling agent hybrids (CSH), was prepared by using collagen hydrolysate (CH) extracted from leather waste as the starting material, and silane coupling agent (SCA) as the crosslinking agent. The as-prepared adhesive was fully characterized by Fourier transform infrared spectroscopy (FTIR), 29Si CP-MAS NMR spectroscopy, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), ANS assay and ninhydrin assay. The as-prepared CSH exhibited pretty good adhesive strength and water resistance. Moreover, the water resistance of CSH can be conveniently tuned by changing the type and dosage of the silane coupling agent. When used as a wood adhesive, the dry adhesive strength of CSH was as high as 1.57 MPa, and the corresponding wet adhesive strength reached 0.95 MPa. Our experimental results suggest that the collagen hydrolysate extracted from leather waste has a great potential to be used as a low-cost and highly effective adhesive in the wood composite industry.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
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