Polypropylene transcrystallization at the surface of graphene modified chitosan fibers
首发时间:2015-12-11
Abstract:Incompatibility between hydrophilic chitosan (CS) fiber and the hydrophobic polymer matrices leads to unsatisfied properties of the composites. The crystallization of polymer on the surface of fiber is a possible way to increase the interfacial interactions. Here, we coated the graphene oxide on CS fiber surface via electrostatic self-assembly to improve the interfacial crystallization between polymer and the CS fiber. Structures of the CS fiber before and after graphene coating were characterized by various methods. The formation of polypropylene (PP) transcrystalline (TC) on the CS fiber surface was studied. It is noted that the low crystallization temperature of fiber induced TC is faster than that at high temperature. There exists α and β crystal of PP in the TC formation process as evidenced by X-ray diffraction and the melting experiment. Polarized light optical microscope results demonstrate the graphene coated CS fiber can also enhance the TC nucleation ability of poly(L-lactide).
keywords: materils science chitosan fibres crystallization
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石墨烯改性的壳聚糖纤维引发聚丙烯横晶
摘要:亲水壳聚糖(CS)的纤维和疏水性聚合物基质之间的不相容导致复合材料的不满意性能。聚合物纤维的表面上的结晶是增加界面相互作用的可能方法。本研究中,我们通过静电自组装涂布所述石墨烯氧化物在CS纤维表面,以改善聚合物和CS纤维之间的界面的结晶。在CS纤维之前和之后的石墨烯涂层的结构通过各种方法。的聚丙烯(PP)横晶(TC)在CS纤维表面的形成进行了研究。应该注意的是光纤中引起的TC的低结晶化温度比快在高温下。存在α和β在如由X-射线衍射和熔融试验对TC形成过程晶体的PP。偏振光光学显微镜结果表明了石墨烯涂覆的CS纤维还可以增强聚(L-丙交酯)的TC核能力。
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No.4669059112151514****
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