材料期刊网

以二甲基亚砜为前驱体制备插层高岭石（K-DMSO），通过原位聚合制备聚丙烯腈（PAN）与 K-DMSO 的复合物，利用静电纺丝技术制备 PAN／K-DMSO 复合纤维膜。采用 XRD，FTIR，TEM 和 TGA 研究 PAN／K-DMSO 复合物的微观形态和热性能，并采用 SEM，POM 和拉伸试验机对其纤维膜的形貌和拉伸强度进行测试表征。结果表明：PAN／K-DMSO 中含有高岭石的内外羟基峰，表征层间距的 d 001值随 PAN 进入高岭石的层间而增大，部分高岭石被剥离形成厚度为2～5nm 的片层结构分散在 PAN 基体中。K-DMSO 的加入使 PAN 的耐热性提高，PAN 纤维膜的直径减小，拉伸强度增加。PAN 与 K-DMSO 的质量比为8∶1时，PAN／K-DMSO 纤维膜的拉伸强度与 PAN 相比，在未处理，冷压和热处理的情况下分别提高了0．92，1．73MPa 和1．96MPa。

Intercalated kaolin was prepared with two dimethyl sulfoxide (DMSO)as precursor,polyac-rylonitrile(PAN)/K-DMSO nanocomposites was prepared by in situ polymerization with PAN and in-tercalated kaolin,and the fiber membranes of PAN/K-DMSO composite were prepared through elec-trostatic spinning technology.The microstructure and thermal properties of intercalation composites PAN/K-DMSO were studied by using XRD,FTIR,TEM and TGA.The micro-morphology and ten-sile strength of fiber membranes were characterized by SEM,POM and tensile testing machine.The results show that PAN/K-DMSO containing hydroxyl group peak which belong to the kaolin.The d 001 layer spacing value of kaolinite increases with PAN into interlayer,and part of kaolinite is peeled and forms lamellar structure with thickness of 2~5nm dispersed in a polymer matrix.The heat resist-ance of PAN/K-DMSO composite is increased with the addition of K-DMSO.The diameter of PAN fiber membranes decreases and the tensile strength increases with the increase of K-DMSO.When the mass ratio of the PAN and K-DMSO is 8∶1,the tensile strength is increased by 0.92,1.73MPa and 1.96MPa in un-treated,cold pressing and heat treatment conditions,respectively,when compared with PAN.