摘要
以表面张力法测定了系列Gemini表面活性剂m-6-m以及对应单体表面活性剂CmTABr的临界胶束浓度(cmc)和降低水表面张力20mN·m-1需要的浓度(pC20).比较这些参数表明m-6-m胶束化和在界面吸附的能力均强于CmTABr,这被归结为Gemini表面活性剂烷烃尾链间的疏水协同效应.与不对称Gemini表面活性剂12-6-m比较,对称的Gemini结构更有利于表面活性剂的聚集和吸附.
The critical micelle concentration （cmc） and the concentration reducing 20 mN·m-1 of water surface tension （pC20） by the Gemini surfactant series （m-6-m） and the corresponding monomers （CmTABr） were determined using surface tension measurements. Comparison between the active parameters indicates that the Gemini surfactants have a stronger micellization and adsorption ability than CmTABr, which is attributed to the hydrophobic synergism between the alkyl tails of the Gemini surfactants. The effects of dissymmetry in the Gemini surfactants （12-6-m） on the micellization and adsorption were also discussed. The results showed that the Gemini surfactant with a symmetric structure is more effective in association and adsorption than that with a dissymmetric structure.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第8期2200-2204,共5页
Acta Physico-Chimica Sinica
基金
supported by the National Natural Science Foundation of China (20673021, 20873024)
Professor Foundation of Fuzhou University, China (2008-XY-5)~~
