聚邻苯二胺/蒙脱土纳米复合材料的合成及其电流变效应  

ELECTRORHEOLOGICAL BEHAVIOR OF POLY-o-PHENYLENEDIAMINE/MONTMORILLONITE NANOCOMPOSITE

作　　者：路军[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学电流变技术研究所,西安710072

出　　处：《复合材料学报》2004年第4期8-12,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(59832090;50272054);国家杰出青年基金(50025207);西北工业大学博士创新基金(200129)

摘　　要：　用乳液共混插层法制备了聚邻苯二胺/蒙脱土纳米复合材料微粒,通过IR、XRD及TEM对其结构进行了表征。结果发现,邻苯二胺插入蒙脱土层间聚合后,导致蒙脱土片层之间的剥离,形成纳米复合材料。将其分散在甲基硅油中(体积分数,22%)配制成无水电流变液,该复合材料表现出较大的协同效应,具有较好的电流变行为。实验结果表明在外加电场下,其电流变效应比聚邻苯二胺、蒙脱土均有显著提高。在3kV/mm(DC,74.5s-1)时,剪切强度达8.27kPa;同时抗沉降性极好,静置60d沉淀率小于3%。介电性能测试表明,聚邻苯二胺/蒙脱土纳米颗粒的介电常数和介电损耗较蒙脱土和聚邻苯二胺均有一定提高,电导率也达到了最佳范围。Poly-o-phenylenediamine/montmorillonite nanocomposite (PoPD-MMT) particles were synthesized by an emulsion intercalation method and characterized by IR, XRD and TEM respectively. The structure analysis shows that the diameter of PoPD-MMT particles is about 100 nm. The electrorheological properties of the suspensions of PoPD-MMT particles in silicone oil (Volume fraction, 22%) have been investigated under DC electric fields. It was found that the mechanic performance of PoPD-MMT ER fluids displayed a notable ER effect. The shear stress of PoPD-MMT ER fluid is 8.27 kPa (3 kV/mm, 74.5 s-1), which is 2.5 times that of the electrorheological fluid at zero field, and much higher than that of pure poly-o-phenylenediamine (PoPD) and pure montmorillonite (MMT). Furthermore, the sedimentation ratio of PoPD-MMT ERF was about 97% after 60 days. The dielectric constant and the dielectric loss tangent of PoPD-MMT nanocomposite were higher than those of PoPD and MMT. It is apparent that the notable ER effect of PoPD-MMT ER fluid was attributed to the prominent dielectric property of the poly-o-phenylenediamine/montmorillonite nanocomposite particles.

关 键 词：插层法 聚邻苯二胺/蒙脱土 纳米复合材料 电流变液 

分 类 号：TM934.3[电气工程—电力电子与电力传动]