季铵化聚硅氧烷的合成及性能研究

Synthesis,Characterization and Performance of Quaternary Ammonium Polyether Polysiloxane

利用含氢聚硅氧烷与烯丙基环氧基聚醚的硅氢加成反应，制得中间体环氧聚醚改性聚硅氧烷（PESO），再与十二烷基叔胺反应，合成了一系列季铵化聚醚改性聚硅氧烷（QPEPS）。用IR、1H NMR等对QPEPS的结构进行表征，用柔软度仪、褶皱弹性仪等对其应用性能进行了研究。结果表明， QPEPS的表面张力18.66～21.09 mN／m。其中， QPEPS－4可乳化成平均粒径为25 nm、 Zeta电位值为＋47.6 mV的透明微乳。与空白样相比，其经向和纬向的弯曲刚度降幅分别为31.6％和41.9％；白度变化很少，其静态吸水时间为1～3 s，对金黄色葡萄球菌和大肠杆菌的抑菌率均大于99％。

A series of quaternary ammonium polyether modified polysiloxanes （ QPEPS ） with pendant quaternary ammonium polyether groups were synthesized by reaction of epoxy polyether polysiloxane （PESO）, which was prepared from polymethylhydridoosiloxane and allyl polyether epoxy via hydrosilylation , with N,N-dimethyldodecylamine .Chemical structures of QPEPS were investigated by IR , 1 H-NMR, TEM, flexibility tester, and so on.Result showed that the surface tensions of QPEPSs were 18.66 -21.19 mN/m.Among which, QPEPS-4 were easily emulsified to a uniform and transparent micro-emulsion.The mean size of QPEPS-4 was 25 nm and the Zeta potential was ＋47.6 mV.Compared with the blank fabrics , the bending ri-gidity of both warp and filling dropped to 31.6% and 41.9%, respectively .There was little change on its whiteness , and its static water absorption time was 1-3 s.The fabric treated by QPEPS-4 demonstrates the a-bility to eliminate 99%of both Staphylococcus aureus and Escherichia coli .