摘要
表面活性离子液体(SAILs)兼备离子液体和表面活性剂的性质^([1])。将其特性引入到传统的有序分子聚集体如PEO-PPO-PEO中,不但有助于改善聚集体的性质,还有望形成形态新颖的聚集体结构。因此,离子液体参与构筑的有序分子聚集体及其与两亲性分子的相互作用引起人们的日益关注^([2-3])。本工作C_8mimBr为SAILs代表,采用NMR和DLS研究了其与F127的相互作用。研究发现,F127的CMT随C_8mimBr的添加而降低,且CMT的下降程度紧密依赖于C_8mimBr的添加量。但是,当溶液中C_8mimBr浓度超过其自身CMC时,F127胶团解聚并分散于以C_8mimBr为主的胶团中。NOESY研究发现F127的EO链段的醚氧原子与C_8mimBr的咪唑环间存在氢键作用,PO链段与C_8mimBr的烷基链间存在疏水相互作用。
Surface active ionic liquids（SAILs）are a new kind of green solvents which are equipped with the properties of both ILs and surfactants.The properties of conventional ordered aggregates could be improved and novel morphology and nano-structure would be generated by introducing the SAILs into them.Hence,the mixed aggregates formed by polymer and IL and their interaction have gained increasing attention.In this work,the interaction between C8 mimBr and F127 was investigated by NMR and DLS.It was demonstrated that the CMT of F127 decreased notably upon the addition of C8 mimBr.Moreover,the decreasing extent of CMT of F127 was closely depended on the added amount of C8 mimBr.However,the disassociation of F127 micelles will take place when the concentration of C8 mimBr is over its own CMC,and micelles mainly formed by C8 mimBr existed in the solution and F127 unimers are embeded in them.The result of NOESY indicates that there are H-bond interaction between the ether oxygen atoms of PEO chains and imidazole ring,and the hydrophobic interaction between PPO chains and alkyl chains of C8 mimBr.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2018年第S1期311-312,共2页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(21676283)资助
