纳米氮化硅的表面处理及其在丁腈橡胶中应用  

The surface modification and application in NBR of nano-size Si3N4

作　　者：董前年[1,2] 章于川[2] 张芬红 汪思保 张彤 

机构地区：[1]合肥开尔纳米技术发展有限公司,安徽合肥230088 [2]安徽大学化学化工学院,安徽合肥230039

出　　处：《功能材料》2007年第A09期3609-3613,共5页Journal of Functional Materials

基　　金：国家科技攻关计划资助项目（2005BA316C）

摘　　要：采用试验室自制的大分子偶联剂对纳米氮化硅进行表面处理，并制备Si4N4／NBR纳米橡胶复合材料。运用TEM、FTIR、XPS等仪器对处理后的纳米氮化硅的表面特性进行系统地研究；同时研究了复合材料的分散性、力学性能、耐热老化性能和耐油性能。结果表明：纳米氮化硅处理后，在有机溶剂中分散性良好，大分子偶联剂包覆在其表面，并与其发生了化学作用，形成了-NH-C=O、Si-O-C键；纳米粒度分析结果显示，当大分子偶联剂用量为10％（质量分数）时，纳米Si3N4粒径较小，分布较窄；纳米Si3N4的加入在一定程度上提高了NBR的撕裂强度、拉伸强度，改善了丁腈橡胶的耐热老化性能和耐油性能。Nano-size Si3N4 was modified with a macromolecular coupling agent which was synthesized by ourselves, and nano-Si3N4/nitrile-butadiene rubber（NBR） composites were prepared by direct blending. The surface properties of modified nano-Si3N4 were systematically investigated by FTIR, TEM, XPS et al, The dispersion, the mechanical properties, the hot-air aged properties and the oil resistance properties of the composites were investigated. The results indicate that modified nano-size Si3N4 was decentralized preferably in organic solvent,the macromolecular coupling agent have coated the surface of nano-Si3N4, and its had chemical reaction, and formed -NH-C=O, Si-O-C covalent bonds. Laser particle sizer experiments showed that the particle diameter of modified nano-size Si3N4 was decreased evidently. When the mass fraction of macromolecular coupling agent coated on the surface of nano-sized Si3N4 was 10%, the particle diameter of the nano-size Si3N4 was less, and the dispersibility of its was narrowest. The results showed that, the tear strength and the tensile strength were improved, the hot-air aged properties and the oil resistance properties of NBR were improved due to the modified nano-Si3N4 with macromolecular coupling agent were added in NBR.

关 键 词：大分子偶联剂 纳米氮化硅 丁腈橡胶 

分 类 号：TQ174.75[化学工程—陶瓷工业]