详细信息
SDS/[C_nmim]Br/H_2O体系的双水相性质
Aqueous Two-Phase System(ATPS) Containing Ionic Liquids [C_nmim]Br and SDS
文献类型:期刊文献
中文题名:SDS/[C_nmim]Br/H_2O体系的双水相性质
英文题名:Aqueous Two-Phase System(ATPS) Containing Ionic Liquids [C_nmim]Br and SDS
作者:陈婷[1];马爱青[2];王菲[1];尚亚卓[1];刘洪来[1]
机构:[1]华东理工大学化学系,化学工程联合国家重点实验室,上海200237;[2]中石化胜利油田分公司采油工艺研究院,山东东营257000
年份:2012
卷号:38
期号:2
起止页码:137
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;Scopus;北大核心:【北大核心2011】;CSCD:【CSCD2011_2012】;
基金:国家自然科学基金(21173079,20736002);教育部长江学者与创新团队计划(IRT0721)教育部留学回国人员科研启动基金;中央高校基本科研业务费专项资金
语种:中文
中文关键词:离子液体;表面活性剂;混合溶液;双水相;液晶
外文关键词:ionic liquids; surfactant; mixed solution; ATPS; liquid crystal
摘要:研究了咪唑类离子液体[Cnmim]Br与传统阴离子表面活性剂SDS混合水溶液的性质,结果显示混合水溶液性质随咪唑阳离子上烷烃链长的变化而呈现出明显的不同。当离子液体取代烷基链的碳数大于或等于6时,混合体系可以自发地分为共存的两相,即双水相。共存的两相界面清晰、性能稳定且能有效萃取染料二甲酚橙,有望成为新型高效的分离体系,在生物活性物质的纯化、分离中发挥作用。混合体系中离子液体和传统表面活性剂相对含量的改变引起混合溶液中表面活性剂聚集体尺寸和形态的变化,最终导致双水相上、下两相表观现象的差异。此外,离子液体、SDS头基间库仑力作用、烷烃链的疏溶剂力以及离子液体与SDS的协同效应,是形成溶致液晶的重要驱动力,导致较低浓度下十字花纹理层状液晶(LC)的生成。
Properties of mixed aqueous solutions of ionic liquid(Br) and traditional surfactant(SDS) were studied.Results showed that the properties of the mixed systems varied with the chain length of substituted alkyl in ionic liquids.Only those systems containing ionic liquids with equal to or more than 6 carbon atoms in alkyl chains can form aqueous two phase system(ATPS).The ATPS containing ionic liquids and surfactant has obvious extraction ability to xylenol orange and the potential to separate and purify biomaterials.The difference in appearance of ATPS should be attributed to the various size and shape of the surfactants aggregates formed in mixed solutions.Furthermore,the electrostatic attractive interaction,the hydrophobic interaction in addition to the synergistic effect between ionic liquids and SDS further promote the surfactant assembly,which leads to the formation of liquid crystal at lower surfactant concentration.
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