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首页> 外文期刊>Journal of Applied Polymer Science >Shape-memory behaviors of electrospun chitosan/poly(ethylene oxide) composite nanofibrous membranes
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Shape-memory behaviors of electrospun chitosan/poly(ethylene oxide) composite nanofibrous membranes

机译：静电纺丝壳聚糖/聚环氧乙烷复合纳米纤维膜的形状记忆行为

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摘要

With aim of constructing a class of functional environmentally friendly materials, we electrospun chitosan (CS) blends with various contents of poly(ethylene oxide) (PEO) into a series of composite nanofibrous membranes exhibiting shape-memory behaviors. In the present composite system, CS and PEO served as hard and soft domains, respectively. The CS, presenting no thermal transition, and the PEO, with apparent melting-crystallization, were demonstrated by differential scanning calorimetry testing. Characterizations also revealed that the morphologies of the CS/PEO membranes were controlled by the mass ratios of CS/PEO. The composite fibrous membranes showed great mechanical performances and thermal stabilities as well. Moreover, CS/PEO possessed excellent shape-memory behaviors. Such fibrous membranes could complete their shape-recovery processes within 20 s at the temperature of 20 degrees C above the melting transition temperature (T-m). Both the shape fixity and shape-recovery ratios were higher than 90%, even after five cycles. The CS/PEO fibrous membranes present significant potential applications in the field of biotechnology and tissue engineering, such as in scaffolds and smart tubes. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42532.
机译：为了构建一类功能性的环保材料，我们将具有各种含量的聚环氧乙烷（PEO）的壳聚糖（CS）共混物电纺成一系列具有形状记忆行为的复合纳米纤维膜。在本复合系统中，CS和PEO分别用作硬域和软域。通过差示扫描量热法测试证明没有热转变的CS和具有明显的熔融结晶的PEO。表征还显示CS / PEO膜的形态受CS / PEO的质量比控制。复合纤维膜也显示出优异的机械性能和热稳定性。此外，CS / PEO具有出色的形状记忆行为。这样的纤维膜可以在高于熔融转变温度（T-m）20摄氏度的温度下于20 s内完成其形状恢复过程。即使经过五个循环，形状固定性和形状恢复率均高于90％。 CS / PEO纤维膜在生物技术和组织工程领域（例如在支架和智能管中）具有重要的潜在应用。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42532。

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