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取向聚氯乙烯/液晶复合膜表面形态特征研究 被引量:1

Characteristic on surficial shape of electric field oriented PVC/liquid crystal composite membrane
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摘要 模仿生物膜表面的液晶态结构,将有序的、流动的胆甾醇液晶与基质材料聚氯乙烯共混,通过在成膜过程中施加不同强度的电场,制成取向聚氯乙烯/液晶复合膜,作为抗凝血生物材料。通过各种测试手段,考察不同取向条件下复合膜表面液晶畴的取向性能、尺寸、表面形态及其与电场强度、液晶含量的相关关系。结果表明:取向聚氯乙烯/液晶复合膜表面呈现出的形态特征是液晶含量、电场强度和基质材料大分子链诱导作用等综合因素影响的结果;电场强度可以调控液晶畴的体积和取向性;通过适当调节电场强度和液晶含量可获得具有一定相分离程度和有序性的复合膜。 By imitating the liquid crystal structure on the surface of biological membranes,the cholesteryl liquid crystal was blended with PVC to prepare oriented composite membranes under different intensities of electric field.The composite membranes were researched as anti-clotting biomaterials through introducing the ordered and flowing liquid crystalline groups into the polymers.The surficial shape characteristic of the composite membranes were characterized.The correlation between surficial shape and electric-field intensity as also LC content were investigated by observing orientation,volume and shape change of LC domain in composite membranes under different oriented and LC content.The results showed that the characteristic surficial shape of composite membranes was effected by LC contents,electric-field intensities and polymer chains.Phase segregation and order of gomposite membranes were under control by adjusting electric-field intensity which might resize the LC domain and its orientation.
出处 《功能材料》 EI CAS CSCD 北大核心 2008年第2期320-323,共4页 Journal of Functional Materials
基金 国家自然科学基金资助项目(30370413)
关键词 液晶 复合膜 取向 表面形态 liquid crystal composite membrane orient surficial shape
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