聚甲基倍半硅氧烷微粉的合成及应用

Synthesis and Application of Hydrophobic Polymethylsilsesquioxane Micro-powder

在无水乙醇体系中,以甲基三乙氧基硅烷(MTES)为原料、氢氧化钠为催化剂进行水解、缩合反应,制得疏水性聚甲基倍半硅氧烷(PMQS)微粉。用傅里叶红外光谱(FTIR)和扫描电镜(SEM)对产物结构和形貌进行了表征。PMQS微粉在非离子表面活性剂作用下与黏度为9 000 m Pa·s的氨基硅油(ASO)进行乳化,制得外观半透明泛蓝乳液(PMQS/ASO乳液),采用纳米粒度表面电位分析仪测定乳液的粒径。考察了ASO乳液、PMQS/ASO乳液在棉织物上的应用性能,并通过SEM对棉布样表面膜形貌进行研究。结果表明,当m(PMQS)∶m(ASO)=3∶7时,乳液的粒径约150 nm,该乳液处理过的棉织物柔软度、滑爽性和防水性较好,接触角为135°。

The hy anhydrous ethanol drophohic polymethylsilsesquioxane micro-powder （PMQS） was synthesized in system by the hydrolysis-condensation reaction,using methyltriethoxysilane （MTES） as a raw material and sodium hydroxide as a catalyst. The structure and surface morphology of PMQS were characterized by means of FTIR and SEM. Then, the PMQS and amino silicon oil （ASO） with a viscosity of 9 000 mPa · s were emulsified using a non-ionic surfactant. And a translucent of PMQS/ ASO microemulsion was obtained. The particle size of the emulsion micelles was measured by nano- particle surface potential analyzer. Finally, the application performance of ASO emulsion and PMQS/ ASO emulsion on cotton fabric surface was investigated. The membrane surface morphology of cotton fabric was studied by SEM. The results show that when the mass ratio of PMQS to ASO is 3：7, the PMQS/ASO emulsion has a particle size of 150 nm and makes the cotton fabric have a better softness surface smoothness and waterproofness. While, the contact angle of cotton fabric is about 135°.