应用静电纺丝技术制备多壁碳纳米管/聚氨酯(MWNTs/PU)复合微/纳米纤维,将该复合纤维收集成无纺布薄膜,采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察了纤维的微观形貌和结构,分别利用X射线衍射(XRD)和差示扫描量热法(DSC)测试了复合纤维的结晶行为及玻璃态转变温度,并测试了纤维薄膜的拉伸力学性能随MWNTs含量的变化关系.结果表明,一定含量的MWNTs能有效地分散于PU溶液中,并能成功地纺出MWNTs/PU复合微/纳米纤维.随MWNTs在PU纤维中含量的增加,纤维的直径变细,复合纤维的玻璃态转变温度提高.在所研究的含量范围内,无纺布的拉伸强度和断裂伸长率随MWNTs含量的增加而有所增大.
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