OALib Journal期刊
尼龙6/有机锂皂石纳米复合材料的制备及性能研究
DOI: 10.11777/j.issn1000-3304.2015.14345
Keywords: 有机化锂皂石 ,聚酰胺6 ,力学性能 ,吸水率 ,分散性
Abstract:
采用十六烷基三甲基溴化铵(CTAB)对锂皂石进行有机改性,制备有机改性锂皂石(Hectorite),并通过熔融共混的方法制备了高性能、低吸水率的尼龙6(PA6)/有机化锂皂石纳米复合材料.采用X射线衍射(XRD)、能谱仪(EDS)、扫描电子显微镜(SEM)、热重分析(TGA)对改性前后的锂皂石进行了分析,结果表明有机改性后的锂皂石结构变疏松,层间距变大,其层间距由改性前的1.33nm增加到1.76nm,元素分析和热重分析计算锂皂石有机物的接枝量分别为0.78和0.73mequiv/g,接枝效率分别为71.04%和66.62%,两种分析结果基本一致.采用示差扫描量热法(DSC)、透射电子显微镜(TEM)、力学性能测试研究了有机化锂皂石的用量对复合材料结晶性能、锂皂石在基体中分散性及力学性能的影响,结果表明锂皂石在PA6中没有起到成核剂的作用,复合材料的结晶度随有机锂皂石用量的增大而逐渐减小,且当锂皂石的含量为5phr时,锂皂石主要以剥离形式分散在基体中,此时复合材料的拉伸强度和弯曲强度均达最大值,分别为81.6MPa和122.1MPa,较纯PA6分别增加了25.54%和23.50%,此外,锂皂石明显降低了PA6的吸水率.
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