Self-Propelled Vesicles Induced by the Mixing of Two Polymeric Aqueous Solutions through a Vesicle Membrane Far from Equilibrium
Self-Propelled Vesicles Induced by the Mixing of Two Polymeric Aqueous Solutions through a Vesicle Membrane Far from Equilibrium
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DOI：
10.1021/acs.langmuir.6b00105
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发表时间：
2016-03-22
期刊：
影响因子：
3.9
通讯作者：
Nagatsu, Yuichiro
中科院分区：
文献类型：
--
作者：
Ban, Takahiko;Fukuyama, Takashi;Nagatsu, Yuichiro
本研究描述了在由聚乙二醇（PEG）、葡聚糖（DEX）和水组成的含水两相系统中使用瞬时界面能的自推进囊泡的发展。当PEG和DEX溶液远离平衡时，在两种可混溶的液体彼此接触时，在PEG和DEX溶液之间的混合边界处产生瞬态界面能。当环境介质中的PEG浓度>15重量%时，包封20重量% DEX溶液的囊泡自发行进。囊泡的运动性随囊泡膜的通透性而变化。当PEG浓度大于15wt%时，膜的渗透性显著增加。PEG不仅对通过膜的质量传递而且对囊泡的运动性具有深远的影响。
This study describes the development of self-propelled vesicles using transient interfacial energy in an aqueous two-phase system composed of polyethylene glycol (PEG), dextran (DEX), and water. The transient interfacial energy was generated at the mixing boundary between the PEG and DEX solutions when the two miscible liquids were in contact with each other far from equilibrium. Vesicles encapsulating 20 wt % DEX solution traveled spontaneously when the PEG concentration in the environmental media was >15 wt %. The motility of the vesicles varied with the permeability of the vesicle membrane. The permeability increased significantly when the concentration of PEG was >15 wt %. PEG had a profound effect not only on mass transfer through the membrane but also on the motility of the vesicles.