改性Kevlar纳米纤维对不同橡胶体系性能的影响:实验和分子模拟  

Effect of modified Kevlar nanofibers on properties of different rubber systems:Experiment and molecular simulation

作　　者：陈梦寒 Amel Mohamed 徐颖淑 杨子凡 贾红兵[1] CHEN Meng-han;Amel Mohamed;XU Ying-shu;YANG Zi-fan;JIA Hong-bing(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学化学与化工学院,南京210094

出　　处：《合成橡胶工业》2023年第6期547-547,共1页China Synthetic Rubber Industry

摘　　要：通过实验和分子模拟研究了环氧氯丙烷改性Kevlar纳米纤维(m-KNFs)与羧基丁腈橡胶(XNBR)、丁苯橡胶(SBR)的界面相互作用及对复合材料性能的影响。研究结果表明,m-KNFs对橡胶体系有明显的增强作用;与m-KNFs/SBR/和m-KNFs/XNBR/SBR体系相比,m-KNFs/XNBR体系中存在的氢键数量最多;相较于XNBR,m-KNFs/XNBR纳米复合材料拉伸强度提高了182%,其原因主要是m-KNF和XNBR基体之间形成了强氢键网络结构,二者界面相互作用最强,相容性也最好。Poly(p-phenylene terephthalamide)(Kevlar)had received much attention in the design of high-performance composites due to its high strength,stiffness and thermal stability[1].However,the poor interfacial adhesion between Kevlar nanofibers(KNFs)and the matrix limited largely the overall performance of the composites.In this work,KNFs modified by epichlorohydrin(m-KNFs)were incorporated into styrene-butadiene rubber(SBR)and carboxylated nitrile butadiene rubber(XNBR),3 molecular models of m-KNFs/XNBR,m-KNFs/SBR and m-KNFs/XNBR/SBR nanocomposites were constructed by molecular dynamics(MD)simulation,and the effect of m-KNFs on the properties of different rubber systems was investigated at the molecular level.The formulation of rubber compounds was as follows:matrix rubber 100 phr(mass,similarly hereinafter),zinc oxide 2.0 phr,stearic acid 2.4 phr,accelerator CZ 2.2 phr,sulfur 1.5 phr,m-KNFs variable(1,3,5 phr),and m(XNBR)/m(SBR)75/25.

关 键 词：Kevlar纳米纤维 丁苯橡胶 羧基丁腈橡胶 纳米复合材料 界面相互作用 

分 类 号：TQ330.1[化学工程—橡胶工业]