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以烯丙基聚氧乙烯醚与六亚甲基二异氰酸酯为原料,在锡催化剂的作用下合成六亚甲基二氨基甲酸酯,然后在铂催化剂作用下,与1,1,1,3,5,5,5-七甲基三硅氧烷(MDHM)进行硅氢化加成反应制得双子型(Gemini)聚氧乙烯醚三硅氧烷表面活性剂(GPETS)。目标产物GPETS的结构用IR和1HNMR进行了表征,并研究了其表面活性。在浓度为5.9×10-5mol/L时,可以将水的表面张力降至22.0 mN/m。在不同的pH下研究其水解稳定性,并与相应的聚氧乙烯醚三硅氧烷表面活性剂对比,结果表明,GPETS的水解稳定性优于后者,适用于更宽的pH范围。
Hexamethylene dicarbamate is synthesized from allyl polyoxyethylene ether and hexamethylene diisocyanate under the action of a tin catalyst, and then reacted with 1,1,1,3 , 5,5,5-heptamethyltrisiloxane (MDHM) hydrosilylation reaction to produce Gemini polyoxyethylene ether trisiloxane surfactant (GPETS). The structure of target product GPETS was characterized by IR and 1HNMR, and its surface activity was studied. At a concentration of 5.9 × 10-5mol / L, the surface tension of water can be reduced to 22.0 mN / m. The hydrolytic stability was studied at different pHs and compared with the corresponding polyoxyethylene ether trisiloxane surfactant. The results showed that the hydrolytic stability of GPETS was better than the latter, which was suitable for a wider pH range.