摘要
通过测定表面张力、黏度、pH研究了十二烷基硫酸钠(SDS)与十二烷基磺基甜菜碱(SB)、月桂酰胺基甘氨酸(NL)之间的相互作用。结果表明:SB与SDS在摩尔比为3∶7时,体系的表面张力达到最低,cmc最小,即出现最大协同效应;在整个pH范围内,表面活性并不随溶液酸碱性的变化而变化。而NL与SDS的复配体系在摩尔比为3∶7到7∶3时,协同效应显著;并且在强酸条件下,体系的表面活性降低,有沉淀生成。
The interactions between sodium dodecyl sulfate （SDS） and zwitterionic surfactants were investigated through the measurements of surface tension, viscosity and pH. The zwitterionic surfactants used are N - alkyl - N, N - dimethylsulfobetaine （SB） and N- lauroylsarcosine （NL）. The results showed that： for a blend with molar ratio of SDS to SB is 7：3, the cmc of these systems exhibits minimum and the surface activity has no change against change of pH. For a blend with molar ratio of NL to SDS is from 3 ： 7 to 7 ： 3, the synergistic effect of the systems exhibits significantly, the surface tension decreases under acidic condition with precipitate formed.
出处
《日用化学工业》
CAS
CSCD
北大核心
2006年第2期69-72,共4页
China Surfactant Detergent & Cosmetics
基金
国家自然科学基金资助项目(50373017)
山东省中青年科研基金重点资助项目(02BS051)
关键词
表面活性剂
协同效应
表面张力
黏度
surfactant
synergistic effects
surface tension
viscosity
