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›› 2006, Vol. 6 ›› Issue (5): 748-752.

• 过程与工艺 • 上一篇    下一篇

CLAs制备及其稳定性的实验研究

何艺,伍志春,毛在砂   

  1. 中国科学院过程工程研究所
  • 出版日期:2006-10-20 发布日期:2006-10-20

Preparation and Stability of Colloidal Liquid Aphrons

HE Yi,WU Zhi-chun,MAO Zai-sha   

  1. Institute of Process Engineering, Chinese Academy of Science
  • Online:2006-10-20 Published:2006-10-20

摘要: 制备了预分散溶剂萃取所需的胶质液泡(CLAs),探讨了溶质的存在对CLAs稳定性的影响. 结果发现,在表面活性剂浓度相同时[离子型表面活性剂浓度为1 g/L,非离子型表面活性剂浓度为1.0%(j)],溶质(苯甲酸)的存在对CLAs稳定性的影响很大,许多在没有溶质存在的条件下能够制备得到稳定的CLAs的表面活性剂组合,在加入了溶质后,不能再制备得到稳定的CLAs. 对于在溶质存在的条件下仍能制备得到稳定的CLAs的表面活性剂组合,考察了表面活性剂浓度对所制得的CLAs平均直径的影响. 结果发现,随着离子型表面活性剂和非离子型表面活性剂浓度的增大,CLAs平均直径逐渐减小. 另外,考察了离子型表面活性剂的类型对CLAs稳定性的影响. 结果发现,当表面活性剂浓度相同时[离子型表面活性剂浓度为1 g/L,非离子型表面活性剂浓度为1.0%(φ)],阴离子表面活性剂十二烷基硫酸钠和十二烷基苯磺酸钠可制备得到稳定的CLAs,而阳离子表面活性剂十六烷基三甲基溴化铵不能制备得到稳定的CLAs.

关键词: 胶质液泡, 稳定性, 表面活性剂, 制备

Abstract: Colloidal liquid aphrons (CLAs) were prepared using non-ionic and ionic surfactants (mixing speed 900 r/min, PVR=10). The effect of the existence of benzoic acid on the stability of CLAs was investigated when the concentrations of surfactants were the same [the ionic surfactant concentration was 1 g/L, and the non-ionic surfactant concentration was 1.0%(j)]. The experimental results showed that the existence of benzoic acid destructed the stability of several CLAs systems that were very stable when no benzoic acid was added into the oil phase. For the CLAs which were stable whether benzoic acid was added or not, the increase in the concentration of ionic and non-ionic surfactants decreased the average diameter of CLAs. It was also found that the type of ionic surfactant affected the stability of CLAs, when the concentrations of surfactants were kept equal [the ionic surfactant concentration was 1 g/L, and the non-ionic surfactant concentration was 1.0%(φ)], anionic surfactant sodium dodecylsulfate (SDS) and sodium dodecylbenzene sulfonate (SDBS) could be used to prepare stable CLAs, but cationic surfactant hexadecyltrimethyl ammonium bromide (HTAB) could not.

Key words: colloidal liquid aphrons, stability, surfactant, preparation