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以丙酮和正己烷为溶剂,聚乙二醇二缩水甘油醚和羟基封端聚二甲基硅氧烷为主要原料在四丁基溴化铵(TBAB)和氢氧化钠(Na OH)的催化下合成环氧基聚醚改性硅氧烷(EPEPS),再与N,N-二甲基长链烷基胺〔C_mH_(2m+1)NH(CH_3)_2〕在无水乙醇溶剂中、盐酸催化下进行季铵化反应,制备季铵盐有机硅双子表面活性剂(mpsi-m),通过FTIR和1HNMR对目标产物进行结构表征,研究m-psi-m中疏水链长度对其表面活性、临界胶束浓度、润湿性能以及乳化稳定性的影响。结果表明,随着疏水链长度的增加,m-psi-m的表面活性和润湿性能下降,临界胶束浓度增大,乳化稳定性增强。
Catalysis of TBAB and NaOH with acetone and n-hexane as solvent, polyethylene glycol diglycidyl ether and hydroxyl-terminated polydimethylsiloxane as main raw materials (EPEPS) and then with N, N-dimethyl long chain alkylamine [C_mH_ (2m + 1) NH (CH_3) _2] in absolute ethanol solvent, Hydrochloric acid catalyzed quaternization reaction to prepare quaternary ammonium silicone gemini surfactant (mpsi-m), the structure of the target product was characterized by FTIR and 1HNMR to study the hydrophobic chain length m-psi-m on its surface activity , Critical micelle concentration, wettability and emulsification stability. The results showed that with the increase of hydrophobic chain length, the surface activity and wettability of m-psi-m decreased, the critical micelle concentration increased, and the emulsion stability increased.