title: Vesicle aggregation in aqueous mixtures of negatively charged polyelectrolyte and conventional cationic surfactant.
abstract: Vesicle aggregation induced by different environmental factors, including the addition of divalent metal ions, decrease of pH, and increase of temperature--was investigated through turbidity measurement, fluorescence measurement, and transmission electron microscope observation in aqueous solutions of hydrolyzed styrene-maleic anhydride copolymer (HSMA) mixed with dodecyltriethylammonium bromide (C(12)Et(3)). The vesicle aggregation can be explained by the dehydration of the vesicle surface through cations addition or temperature increase based on an analysis of the interaction between vesicles. Moreover, the steric repulsion was introduced to the system and the control of vesicle aggregation was achieved.
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Jingxia
authors.initials: J
authors.lastname: Yao
authors.forename: Yuan
authors.initials: Y
authors.lastname: Feng
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zichen
authors.initials: Z
authors.lastname: Li
authors.forename: Jianbin
authors.initials: J
authors.lastname: Huang
authors.forename: Honglan
authors.initials: H
authors.lastname: Fu
mesh_terms: D002412:Cations / Q000737:chemistry*; D002627:Chemistry, Physical / Q000379:methods; D004573:Electrolytes; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008670:Metals / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D011108:Polymers / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: D002412:Cations; D004573:Electrolytes; D005456:Fluorescent Dyes; D007477:Ions; D008670:Metals; D011108:Polymers; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; D014867:Water; C022806:dodecyltrimethylammonium