Visible Light-Controlled Inversion of Pickering Emulsions Stabilized by Functional Silica Microspheres
Visible Light-Controlled Inversion of Pickering Emulsions Stabilized by Functional Silica Microspheres
复制标题
功能性二氧化硅微球稳定的皮克林乳液的可见光控制反转
DOI：
10.1021/acs.langmuir.7b03822
复制
发表时间：
2018-02-27
期刊：
影响因子：
3.9
通讯作者：
Wang, Jianji
中科院分区：
文献类型：
--
作者：
Chen, Yongkui;Li, Zhiyong;Wang, Jianji
设计并描述了一类新型供体-受体 Stenhouse 加合物 (DASA) 功能化二氧化硅微球 (SM)，用于配制在可见光照射下具有反转特性和大极性变化的 Pickering 乳液。通过用可见光调节功能性 SM 颗粒的亲水性，这些 Pickering 乳液可以轻松地实现从油包水到水包油的转化。乳液的反转性能归因于 DASA 光异构化，在可见光照射下，从延伸的、疏水性的、深紫色的三烯变成致密的、两性离子的、无色的环戊烯酮。这种独特的反转行为已应用于控制荧光素钠盐的封装和释放。
A new class of donor-acceptor Stenhouse adduct (DASA)-functionalized silica microspheres (SMs) is designed and described to formulate Pickering emulsions with inversion property and large polarity change upon visible light irradiation. By tuning the hydrophilicity of the functional SM particles with visible light, these Pickering emulsions can easily perform inversion from water-in-oil to oil in-water. The inversion performance of the emulsions is ascribed to DASA photoisomerization from an extended, hydrophobic, and intensely purple-colored triene to a compact, zwitterionic, and colorless cyclopentenone upon irradiation with visible light. This unique inversion behavior has been applied to control encapsulation and the release of fluorescein sodium salt.