摘要
研究了Gemini阴离子表面活性剂的表面活性。结果表明,其表面活性远远高于相应的单基表面活性剂,其临界胶束浓度(CMC)比相应的单基表面活性剂降低了1个数量级,且随着联接基团长度的增加,CMC呈减小的趋势;测定了Gemini阴离子表面活性剂的表面张力,其C20比常用的单基表面活性剂降低了2个数量级,显示出突出的降低水表面张力的效率;油水界面张力的测定结果表明,在GeminiD质量分数为0.1%时,就可以使得油水界面张力达到超低,具有突出的降低油水界面张力的能力。
Anionic Gemini surfactant system were investigated in this paper. The results reveal that the (critical) micella concentration(CMC) of Gemini surfactant has a much lower value compared with that of (conventional) monomeric one and CMC is decreased upon increasing spacer length. Surface tensions of Gemini surfactants were studied by means of the drop volume method. The surface tension of Gemini surfactant with c_(20) is two orders of magnitude lower than that of monomeric surfactant, indicating that Gemini surfactant is more efficient in declining the surface tension of water. The interfacial tensions of crude oil and water systems were measured by virtue of the pendant drop method. The surface tension of the crude oil and water system is ultra-low when the system contains 0.1% Gemini D which indicates that Gemini surfactants show a great effect on declining the interfacial tensions between oil and water.
出处
《应用化学》
CAS
CSCD
北大核心
2005年第7期792-795,共4页
Chinese Journal of Applied Chemistry
