Carboxylated graphene oxide-reinforced polyvinyl alcohol/soy protein composite fibers: thermal and mechanical study

IF 2.4 3区 化学 Q3 POLYMER SCIENCE Iranian Polymer Journal Pub Date : 2024-08-13 DOI:10.1007/s13726-024-01368-9
Hao Li, Yingbo Chen, Pengfei Li, Ke Zhao
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Abstract

The environmental crisis caused by the use of petroleum-based fibers and the massive depletion of petroleum resources threaten the sustainable development of mankind. Therefore, regenerated protein fibers have gained widespread attention for their green credentials, ingenuity and excellent compatibility. In this work, polyvinyl alcohol (PVA)/soy protein (SP)-carboxylated graphene oxide (GO–COOH) (PVA/SP–GO–COOH) composite fibers were prepared by wet spinning of aqueous solution containing PVA, SP, and GO-COOH. The composite fibers were analyzed for their morphology, structure, thermal stability, and mechanical properties. The results indicated that the composite fibers have both the glossy properties of SP and excellent mechanical properties of PVA. This was attributed to the good dispersion and compatibility of SP and GO–COOH in the PVA matrix. When GO–COOH was added at 0.5% (by weight), the tensile strength of the composite fibers reached 3.29 cN/dtex and the Young’s modulus was 113.92 cN/dtex, which increased by 87% and 67%, respectively, as compared to that of the pure PVA fiber. The moisture regains of the composite fibers reached 8.27%. Furthermore, the maximum decomposition temperature reached 326.7 °C and the thermal stability of the composite fibers increased due to the shielding effect of GO–COOH and formation of hydrogen bonding with the polymer.

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羧基氧化石墨烯增强聚乙烯醇/大豆蛋白复合纤维:热学和力学研究
使用石油基纤维造成的环境危机和石油资源的大量消耗威胁着人类的可持续发展。因此,再生蛋白质纤维以其绿色环保、独创性和出色的兼容性而受到广泛关注。在这项研究中,通过对含有 PVA、SP 和 GO-COOH 的水溶液进行湿法纺丝,制备了聚乙烯醇(PVA)/大豆蛋白(SP)-羧基氧化石墨烯(GO-COOH)(PVA/SP-GO-COOH)复合纤维。对复合纤维的形态、结构、热稳定性和机械性能进行了分析。结果表明,复合纤维既具有 SP 的光泽特性,又具有 PVA 的优异机械特性。这归功于 SP 和 GO-COOH 在 PVA 基质中良好的分散性和相容性。当添加 0.5% 的 GO-COOH(按重量计)时,复合纤维的拉伸强度达到 3.29 cN/dtex,杨氏模量为 113.92 cN/dtex,与纯 PVA 纤维相比,分别提高了 87% 和 67%。复合纤维的回潮率达到 8.27%。此外,由于 GO-COOH 的屏蔽作用以及与聚合物形成氢键,复合纤维的最高分解温度达到 326.7 °C,热稳定性得到提高。
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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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