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首页> 外文期刊>Journal of Applied Polymer Science >Effects of montmorillonite on the structure and properties of gelatin-polyethylene glycol composite fibers
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Effects of montmorillonite on the structure and properties of gelatin-polyethylene glycol composite fibers

机译：蒙脱土对明胶-聚乙二醇复合纤维结构与性能的影响

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摘要

To improve the thermal and mechanical properties of gelatin-polyethylene glycol (PEG) composite fibers, montmorillonite (MMT) is incorporated into gelatin-PEG composite fibers during gel-spinning process. The effects of MMT on the structure and properties of gelatin-PEG composite fibers are investigated. The viscosimetry analysis and transmission electron microscopy measurements show that MMT has a good dispersion in spinning solution at low loading, while serious aggregation is observed with excess amount of MMT adding. The data of X-ray diffraction (XRD) show that MMT can be intercalated and exfoliated in gelatin-PEG-MMT nanocomposite fibers. Fourier transform infrared (FTIR) studies show the hydrogen bonding interactions between gelatin and MMT. The mechanical properties, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) measurements indicate that the mechanical and thermal properties of nanocomposite fibers are improved as expected at low loading of MMT. However, excess amount of MMT decreases the mechanical and thermal properties of nanocomposite fibers due to poor dispersion and clay cluster induced gelatin chains aggregation. Moreover, it is found that the mechanical properties of gelatin-PEG-MMT nanocomposite fibers may be more sensitive to conformational change of gelatin molecules caused by the addition of MMT.
机译：为了改善明胶-聚乙二醇（PEG）复合纤维的热学和机械性能，在凝胶纺丝过程中将蒙脱石（MMT）掺入明胶-PEG复合纤维中。研究了MMT对明胶-PEG复合纤维结构和性能的影响。粘度分析和透射电子显微镜测量表明，MMT在低负荷下在纺丝溶液中具有良好的分散性，而在过量加入MMT时观察到严重的聚集。 X射线衍射（XRD）数据表明，MMT可以插入和剥落在明胶-PEG-MMT纳米复合纤维中。傅里叶变换红外（FTIR）研究表明，明胶和MMT之间存在氢键相互作用。机械性能，差示扫描量热法（DSC）和热重分析（TGA）测量表明，纳米复合纤维的机械性能和热性能在MMT低负荷下如预期的那样得到了改善。然而，由于分散性差和粘土团簇引起的明胶链聚集，过量的MMT降低了纳米复合纤维的机械和热性能。此外，发现明胶-PEG-MMT纳米复合纤维的机械性能可能对由MMT的添加引起的明胶分子的构象变化更敏感。

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