含Brij35可聚合型非离子表面活性剂的合成与表征

Synthesis and Characterization of Polymerizable Nonionic Surfactant Containing Brij35

以对甲苯磺酸为酯化反应催化剂、对苯二酚为丙烯酸阻聚剂,通过丙烯酸(AA)与非离子表面活性剂聚氧乙烯月桂醇(Brij35)的酯化反应,制备了具有聚合活性的新型表面活性剂ABr35,产率为86%.采用FTIR和1HNMR表征其化学结构,并用荧光激发光谱表征其临界胶束浓度(CMC).结果表明:ABr35的化学结构与预期结果相符,其CMC为0.026mmol/L,远低于Brij35的0.07mmol/L,其主要原因在于疏水性丙烯酸酯基团的引入使得疏水聚集在更低的浓度下发生.

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 ^1HNMR. 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.