摘要
研究了影响离子液体双水相形成的主要因素.实验发现,辅助盐对双水相平衡线影响不明显.阴离子对相线的影响主要遵守“Hofmeisterrule”,其水合性越小越利于形成双水相.降低离子液体头部极性以及增加碳链长度都有利于双水相的形成,但效果比阴离子弱.升高温度将抑制短链离子液体双水相的形成,但能促进长链离子液体双水相体系的形成.
The phase behavior of ionic liquids aqueous two-phase （ILATPS） was investigated. It was found that the additive salt had little effect on the phase equilibrium of aqueous two-phase. The effect of anion mainly obeyed the Hofmeister rule, and the formation of ILATPS could be promoted by the increase of the hydrophobicity of anion. The formation of ILATPS could also be promoted by the increase of polarity of the head group, and by the increase of the side-chain length of ionic liquids, but the effect was weaker than that anion. An elevated temperature would inhibit the formation of ILATPS for short-chain ionic liquids, but would promote the formation of ILATPS for long-chain ionic liquids.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第9期2149-2151,共3页
CIESC Journal
基金
国家自然科学基金重大基金项目(20490200)
国家自然科学基金创新群体基金项目(20221603).~~
关键词
离子液体
双水相
相图
ionic liquid
aqueous two-phase
phase diagram
