摘要
绿色表面活性剂烷基糖苷C12G1.46具有混合糖苷组成,将其分别与十二烷基三氧乙烯磺酸钠C12E3S、十二烷基三甲基氯化铵C12TAC、三硅氧烷非离子表面活性剂BE-6、聚醚类表面活性剂TMN-6复配,在25℃下测定它们在0.1 mol/L NaC l溶液中的表面活性,通过其混合表面层和混合胶束的分子交换能(ε,εm)的计算得出如下结论:(1)C12G1.46的活性高于C12G1和C12G2,即烷基混合糖苷的活性高于相同烷基的纯糖苷的结论得到了进一步证实.利用MM2分子力场计算的能量数据可合理地解释这种混合产品活性提高的原因.(2)在该烷基混合糖苷的二元体系溶液中,对其表面吸附和胶束化两个过程的顺序问题进行探讨,一种情况是先建立表面吸附,再形成胶束(C12G1.46/BE-6和C12G1.46/TMN-6体系);另一种情况是表面吸附和胶束化同时进行(C12G1.46/C12TAC和C12G1.46/C12E3S体系).
Surface tension, dynamic surface tension and molecule exchange energy in mixed monolayer formation（ε） and mixed micellization（εm ） were determined, for binary mixtures of a multi-degree polymerized dodecyl polyglycoside C12 G1.46 with C 12 E3 S （ trioxyethylenated dodecyl sulfonate ）, C 12 TAC （ dodecyl trimethylammonium chloride）, BE-6（ hexa-oxyethylenated trisilaxane surfactant）, and TMN-6（ hexa-oxyethylenated-2,6, 8-trimethyl-nonanol）, respectively, in 0. 1 moL/L NaCl solution at 25℃. From the results obtained two conclusions are drawn： （1） C12G1.46 is more surface-active than pure C12G1 and C12G2, which is interpreted by the energy results calculated by using MM2 force field method; （2） for C12 G1.46/BE-6 and C12G1.46/TMN-6 systems, the mixed monolayer formation is prior to the mixed micelle formation, in which ε-εm 〈 0 and the dynamic surface tensions reach the meso-equilibrium with 15 s; while for C12 G1.46/C12E3S and C12 G1.46/ C12TAC systems, surface adsorption and micellization processes occurred at the same time, in which ε-εm≥0 and the meso-equilibrium are reached within about 50 s.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期314-318,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:30370945)
国家"九七三"计划子课题基金(批准号:2003CCA02900)
贵州省省长重点科研项目基金(批准号:2001-6)资助
