摘要
测定了十二烷基磺酸钠（As）／正丁醇／20％苯乙烯／水体系的相平衡.用冷冻刻蚀、ESR、FT－IR研究了上述体系微乳液的结构。研究表明，苯乙烯含量恒定时（20％），随着体系中水含量增加，电导确定的双连续结构的徽乳液经历着从油包水（W／O）到双连续（BC）再到水包油（O／W）变化．FT－IR测定表明，W／O微乳液较O／W微乳液的OH伸缩振动和弯曲振动频率有显著减小，说明W／O微乳液中氢键缔合要比O／W强得多。ESR测定表明O／W微乳液的旋转相关时间高于W／O微乳液，说明O／W微乳液“界面”的微观粘度高于W／O微乳液“界面”的微观粘度。
The isothermal phase diagram for the system sodium dodecyle sulfonate/nbutanol/20% styrene/water has been determined at 40 ℃ The freeze fracture electron microscope,ESR, FT-IR have been used for determining the structures of microemulsions. The investigationshows that, with the increase of H2O-content the bicontinuous structural microemulsions determined by conductivity measurement undergo a change from W/O to bicontinuous (BC) and toO/W when the content of styrene is constant (20%). The stretching vibration and the bendingvibration frequencies of OH in W/O microemulsions are less than those in O/W microemulsions,which indicates that the association strength of the hydrogen bonds in W/O microemulsions aremuch stronger than those in O/W microemulsions. The correlation tAnes, Tc in O/W microemul, are longer than that in W/O microemulsions, indicating that the microviscosity in O/Wmicroemulsion interface is higher than that in W/O microemulsion interface.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1997年第7期593-597,共5页
Acta Physico-Chimica Sinica
基金
中国博士后科学基金
关键词
十二烷基磺酸钠
ESR
FTIR
冷冻刻蚀
微乳液
Sodium dodecyle sulfonate, ESR, FT-IR, Reeze fracture electron microscope,Structures
