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首页> 外文期刊>RSC Advances >Regulating the mechanical properties of poly(1,8-octanediol citrate) bioelastomer via loading of chitin nanocrystals
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Regulating the mechanical properties of poly(1,8-octanediol citrate) bioelastomer via loading of chitin nanocrystals

机译：通过甲壳质纳米晶体的负载来调节聚（1,8-辛二醇柠檬酸酯）生物弹性体的机械性能

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摘要

Chitin nanocrystal (ChiNC), a biocompatible and biodegradable nanofiller, was used to regulate the mechanical properties of poly(1,8-octanediol citrate) (POC) elastomer. The facile casting/evaporation method was utilized to prepare ChiNC/POC nanocomposite and its structure and properties were characterized by Fourier transform infrared spectroscopy, wide angle X-ray diffraction, scanning electron microscopy, dynamic mechanical analysis, uniaxial tensile test and static water-contact-angle analysis. The results showed the ChiNCs were uniformly distributed in the POC matrix at any test loading ratio and proved to be chemically bonded to the POC network, leading to a gradually increasing tensile modulus and strength, concomitantly without causing damage to elongation at break. Thus regulation of the strength and modulus of POC by loading with ChiNCs can be realized. Furthermore, the incorporation of ChiNCs into POC networks provided more hydrophilicity and the equilibrium swelling degree in PBS buffer was as low as 11%, which is in favour of in vivo usage.
机译：几丁质纳米晶体（ChiNC）是一种生物相容性和可生物降解的纳米填料，用于调节聚（1,8-辛二醇柠檬酸酯）（POC）弹性体的机械性能。利用简便的流延/蒸发法制备了ChiNC / POC纳米复合材料，并通过傅里叶变换红外光谱，广角X射线衍射，扫描电子显微镜，动态力学分析，单轴拉伸试验和静态水接触对其结构和性能进行了表征。角度分析。结果表明，ChiNCs在任何测试加载率下均均匀地分布在POC基质中，并被证明与POC网络化学键合，从而导致拉伸模量和强度逐渐增加，同时不会破坏断裂伸长率。因此，可以通过加载ChiNC来调节POC的强度和模量。此外，将ChiNCs掺入POC网络可提供更大的亲水性，并且PBS缓冲液中的平衡溶胀度低至11％，这有利于体内使用。

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