摘要
本文研究了阴-非离子混合表面活性剂体系的溶液性质,计算了混合胶团的组成及其影响因素,考察了 Ca^(2+)的存在对混合溶液性质和混合胶团的影响。
In this paper solution properties of mixed anionic/nonionie surfactants are investigated. The system studied is sodium dodecylsulfate(SDS)—hexaoxyethylene glycol monododecyl ether(C_12E_6)—water.The critical micellar concentrations(cmc's) of mixed solutions de- crease with increasing molar fraction of C_12E_6 in mixed surfaetants,the deviation from that predicted from a mixed law based on ideal solution concept being negative.The composition of the mixed micelle is presented in terms of a regular solution concept and shown to vary with varying composition of mixed surfactants.The constant,β,and the molar energy,E, of interaction between SDS and C_12E_6 molecules in the mixed micelle are functions of compo- sitions of mixed micelle and solutions,their average values are determined as -6.9 and 1.44 J/mol,respectively.In the presence of calcium ions cmc's of mixed surfactants solu- tions,contents of SDS in mixed micelle,and β and E values are decreased at low molar fractions of C_12E_6 in mixed surfactants(0.1 and 0.2).
出处
《油田化学》
CAS
CSCD
北大核心
1989年第2期152-155,共4页
Oilfield Chemistry
