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论文类型：期刊论文
发表时间：2014-08-01
发表刊物：EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
收录刊物：SCIE、Scopus
卷号：116
期号：8
页面范围：961-967
ISSN号：1438-7697
关键字：Cationic/anionic system; CO2-response; pH-response; Spontaneous vesicle
摘要：By dynamic light scattering (DLS) and transmission electron microscopy (TEM), it is shown that spherical vesicles are formed spontaneously in the mixed systems consisting of sodium dodecyl benzene sulfonate (SDBS) and N'-dodecyl-N,N-dimethylacetamidinium bicarbonate (DAB). These vesicles can be successfully tuned by alkali, but not CO2-switch due to the unsuitable pK(a) of DAB. In SDBS/DAB system, alkalinity increase can substantially expand the vesicle size in DAB-rich zone, but same effect is indistinguishable in SDBS-rich zone. Only DAB solution can also form vesicles when the solution pH is close to the pK(a) of DAB.
   Practical applications: The vesicles can be spontaneously formed by mixing DAB and SDBS aqueous solution at various concentrations and mole fractions. These vesicles can expand gradually as the solution pH increases. They can be used as pH-response vesicles for application in drug-delivery, size-selective release, biochemical reactions, and so on.