摘要： 以硝化纤维(NC)、异佛尔酮二异氰酸酯(IPDI)、二羟甲基丙酸(DMPA)等为主要原料,制得自乳化型水性硝化纤维乳液,再加入可水解自交联的硅烷偶联剂KH560,其分子中的环氧基与羧基反应,从而制备出KH560改性水性硝化纤维乳液。通过傅里叶变换红外光谱(FT-IR)、透射电子显微镜(TEM)、热重分析(TGA)法等测试手段,研究了KH560和DMPA的含量对乳液及其涂膜性能的影响。结果表明:当w(KH560)=7%,w(DMPA)=3.5%时,改性后的乳液具有良好的稳定性,涂膜的耐水性、耐乙醇性、热性能、力学性能均得到明显改善。

关键词: 水性硝化纤维, KH560, 改性, 乳液, 涂膜, 性能

Abstract:

A self-emulsified waterborne nitrocellulose emulsion were prepared with nitrocellulose(NC),isophorone diisocyanate(IPDI), dimethylol propionic acid (DMPA) as main materials, and then reacted with silane coupling agent KH560 in which the epoxy group and carboxyl group to form a KH560 modified NC emulsion. The effect of KH560 content and DMPA content on properties of emulsion and coating were investigated by FT-IR, TEM, TGA ,etc. The results showed that modified emulsion has good stability and the water-resistance, the ethanol-resis, thermal stability and mechanical properties of coating have been significantly improved when KH560 was 7% and DMPA was 3.5%(m/m).

Key words: waterborne nitrocellulose, KH560, modification, emulsion, coating, property