含羟基-磺酸基不对称表面活性剂的合成及表面活性

Synthesis and surface activity of dissymmetric surfactants containing a sulfonic and a hydroxyl group

以三聚氯氰、氨基乙磺酸、乙醇胺和二正己胺、二正辛胺以及二异辛胺为原料合成出3种疏水结构不同的含羟基-磺酸基不对称表面活性剂(XSOHC6,XSOHC8和XSOHEC8),并用1HNMR,ESI-MS和元素分析对终产品进行了结构表征,结果与目标结构一致。采用吊片法测定目标产物的表面活性,运用稳态荧光探针法测定3种表面活性剂的临界胶束聚集数(Nm)。30℃下,XSOHC6,XSOHC8和XSOHEC8的cmc依次为8.1×10-4,2.1×10-6和8.5×10-5mol·L-1,γcmc分别为33.0,27.6和28.2 mN·m-1,Nm分别为18,11和18。结果表明此类表面活性剂均具有较好的表面活性。

Three dissymmetric surfactants containing a sulfonic and a hydroxyl group with different length of carbon chain （XSOHC6, XSOHC8 and XSOHEC8 ） were synthesized with eyanuric chloride, three different kinds of fatty amine, taurine and ethanolamine as starting materials. Structure of the targeted products was characterized by l HNMR, ESI - MS and elemental analysis. Surface activity of the surfactants was measured by Wilhelmy plate method. The critical aggregation number of mieelle （N,n） was determined by steady - state fluorescence probe method. The cmc of XSOHC6 ,XSOHCs and XSOHEC8 is 8.1 ×10 -4,2. 1× 10 -6 and 8.5 × 10 -5 mol. L- 1 ,γcmcof them is 33.0,27. 6 and 28.2 mN. m - 1, and Nm of them is 18,11 and 18 respectively. The results of the study showed that such dissymmetric surfactants have rather good surface activity.