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以十四烷基二甲基磺丙基甜菜碱(CAB-35)和壬基酚聚氧乙烯醚(TX-4)为表面活性剂(S)、正戊醇为助表面活性剂(As)和石蜡为油相,制备了水包油(O/W)型微乳液。研究结果表明:随着增水量的增加,微乳液发生Winsor I→Winsor Ⅲ→WinsorⅡ相转变;当Na+取代Ca2+时,微乳液的增溶性呈先降后升态势;35℃时微乳液的CMC(临界胶束浓度)为1.38 g/L,CMC对应的表面张力为26.54 m N/m;当表面活性剂浓度超过0.50%(相对于微乳液质量而言)时,油-水界面张力达10-3m N/m,并且界面张力随Na2CO3增加呈先降后升再降态势;微乳液在盐度为0.05%~0.90%时具有一定的抗盐性,温度、p H对其稳定性影响较大。
Amyl alcohol was used as cosurfactant (As), and myristyl dimethyl sulfopropyl betaine (CAB-35) and nonylphenol polyoxyethylene ether (TX-4) And paraffin oil phase, oil-in-water (O / W) microemulsion was prepared. The results showed that the Winsor I → Winsor Ⅲ → WinsorⅡ phase transition occurred in the microemulsion with the increase of the amount of water. When Na + was substituted for Ca2 +, the solubilization of the microemulsion first decreased and then increased. The microemulsion CMC The critical micelle concentration is 1.38 g / L and the CMC corresponds to a surface tension of 26.54 mN / m. When the surfactant concentration exceeds 0.50% (relative to the mass of the microemulsion), the oil-water interfacial tension reaches 10- 3m N / m, and the interfacial tension decreased with the increase of Na2CO3, and then decreased. Then the microemulsion had certain salt resistance when the salinity was 0.05% ~ 0.90%. The temperature and p H had a great influence on its stability .