关键词: 非离子表面活性剂, 聚氧乙烯, 丙烯酸, 临界胶束浓度, 合成, 表征

Abstract:

A novel surfactant ABr35 was synthesized via the esterification of nonionic surfactant ployoxyethylene lauryl alcohol （Brij35） and acrylic acid （AA）, with p-toluenesulfonic acid as the catalyst and with hydroquinone as the inhibitor of crylic acid. The product, whose yield reaches 86%, was then structurally characterized by means of FTIR and ¹ NMR. Moreover, the critical micelle concentration （CMC） of the product was measured using the fluorescence excitation spectra. The results show that the synthesized ABr35 is of a structure similar to what is expected, and that, with the addition of hydrophobic acrylate groups, the hydrophobic congregation occurs at lower concentration, so that the CMC of ABr35, 0. 026 retool/L, is much less than the value of 0. 07 mmol/L of Brij35.

Key words: nonionic surfactant, poly （ ethylene oxide ）, acrylic acid, critical micelle concentration, synthesis, characterization