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首页> 外文期刊>Journal of Applied Polymer Science >Environmentally friendly biological nanofibers based on waste feather keratin by electrospinning with citric acid vapor modification
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Environmentally friendly biological nanofibers based on waste feather keratin by electrospinning with citric acid vapor modification

机译：基于废羽壁素的环保生物纳米纤维通过静电纺丝储柠檬酸蒸汽改性

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摘要

Waste feather keratin (FK)-based nanofibers by electrospinning and citric acid (CA) vapor modification has been successfully prepared and investigated. FK, poly(vinyl alcohol), and poly(ethylene oxide) have been used as raw materials and CA vapor as cross-linker. The structural, thermal, hydrophobicity, and mechanical properties of FK-based nanofibers by CA vapor modification with various cross-linking time have been completely explored. In order to investigate the effect of H2O vapor on CA vapor modification, H2O vapor modification was performed on the FK-based nanofibers at the same conditions. The results show that the average diameter of nanofibers increased from 250.83 +/- 29.65 nm to 338.79 +/- 31.43 nm by CA vapor modification with 15 h. Similarly, the thermal stability and water resistance of FK-based nanofibers by CA vapor modification have been significantly improved. The tensile strength (sigma(b)) and elongation at breakage point (epsilon(b)) of FK-based nanofibers after CA vapor modified for 15 h were about 1.5 and 2 times higher than that of nonmodified nanofibers, respectively. By comparison, scanning electron microscopy results suggest that the FK-based nanofibers modified by H2O vapor cannot maintain the morphology of the nanofibers, resulting in large-scale adhesion. The thermal properties of FK-based nanofibers with H2O vapor modification have no obvious change. The hydrophobicity and mechanical properties of FK-based nanofibers by H2O vapor modification are not as good as that of CA vapor modification. In summary, these results exhibit that nontoxic and natural CA can be used as cross-linking agent to enhance the comprehensive performance of FK-based nanofibers. This study provides a new method to modify FK-based nanofibers and refined the waste feathers, which not only protected the environment, but also gained benefits, which has a broad application prospect.
机译：通过静电纺丝和柠檬酸（CA）蒸汽改性，成功制备并研究了废弃羽毛角蛋白（FK）基纳米纤维。FK、聚乙烯醇和聚环氧乙烷被用作原料，CA蒸汽作为交联剂。通过不同交联时间的钙蒸汽改性，对FK基纳米纤维的结构、热性能、疏水性和力学性能进行了全面的研究。为了研究水蒸气对钙蒸气改性的影响，在相同条件下对FK基纳米纤维进行了水蒸气改性。结果表明，经过15小时的CA蒸汽改性，纳米纤维的平均直径从250.83+/-29.65 nm增加到338.79+/-31.43 nm。同样，通过CA蒸汽改性，FK基纳米纤维的热稳定性和耐水性也得到了显著改善。经CA蒸气改性15h后，FK基纳米纤维的拉伸强度（sigma（b））和断裂伸长率（epsilon（b））分别是未改性纳米纤维的1.5倍和2倍。相比之下，扫描电子显微镜结果表明，经H2O蒸汽改性的FK基纳米纤维无法保持纳米纤维的形态，导致大规模粘附。水蒸气改性FK基纳米纤维的热性能没有明显变化。水蒸气改性FK基纳米纤维的疏水性和力学性能不如CA蒸气改性。综上所述，这些结果表明，无毒的天然钙可以用作交联剂来提高FK基纳米纤维的综合性能。本研究为FK基纳米纤维的改性和废弃羽毛的精制提供了一种新的方法，既保护了环境，又获得了效益，具有广阔的应用前景。

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