摘要
采用分水时间法考察了结构明确的高纯度烷基芳基磺酸钠在烷烃中的乳化现象。以液态石蜡为油相,讨论了乳化剂浓度对乳状液稳定性的影响,确定了最适宜的乳化剂浓度,并研究了烷基链长度、芳基结构和芳基在烷基链位置对形成的乳状液稳定性的影响关系,考察了不同油相对乳状液稳定性的影响。结果表明,最适宜的乳化剂质量分数为0.1%;当固定芳基结构时,随着烷基链上碳数的增加,乳状液稳定性线性增强;当固定烷基链碳数时,随着芳基上碳原子的增加,乳状液稳定性增强;随着芳基位置向烷基链中间位置移动,乳状液稳定性增强;随着油相分子量的增加,能形成稳定乳状液所需的乳化剂的分子量随之递增。
The abilities of sodium alkyl aryl sulfonate,which had high-purity and defined structure,to emulsify alkanes,were investigated by a water diversion method.Using liquid paraffin wax as the oil phase,the effects of the concentration of emulsion,length of alkyl chain,structures and locations of aryl groups in alkyl chain on emulsion stability were studied,and the best concentration of emulsion were determined.Meanwhile,the effects of different oil phases to emulsion stability were discussed.The experimental data showed that the best mass fraction of emulsion was 0.1%.With definite structures of aryl group,emulsion stability increased linearly with the increasing of the length of carbonic chain.When the length of alkyl chain on alkyl group was set,the emulsion stability was enhanced with the increasing of the length of alkyl chain on aryl group.With the aromatic ring shifts from the terminal to the center of the long alkyl chain,the emulsion stability increased.With the increase of molecular mass of oil phases,the molecular mass of emulsifier to achieve stable emulsifying liquid increased.
出处
《应用化学》
CAS
CSCD
北大核心
2011年第5期560-564,共5页
Chinese Journal of Applied Chemistry
基金
国家重点基础研究发展计划(九七三)(2005cb221300)
黑龙江省研究生创新科研基金(YJSCX2008-044HLJ)资助项目
关键词
界面膜
构效关系
乳状液
表面活性剂
烷基芳基磺酸钠
interfacial film
structure-property relationship
emulsion
surfactant
sodium alkyl aryl sulfonate
