Emulsion Interfacial Synthesis of Polymer/Inorganic Janus Particles
Emulsion Interfacial Synthesis of Polymer/Inorganic Janus Particles
复制标题
聚合物/无机Janus颗粒的乳液界面合成
DOI：
10.1021/acs.langmuir.9b00211
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发表时间：
2019-05-07
期刊：
影响因子：
3.9
通讯作者：
Yang, Zhenzhong
中科院分区：
文献类型：
--
作者：
Chen, Xi;Xu, Jingjing;Yang, Zhenzhong
我们报告了一种方法来制备聚合物/无机Janus粒子通过转移自组装膜的共聚物，如PS-b-PAA在乳液界面时，胺封端的粒子，如顺磁性Fe3O4@SiO2核/壳粒子被优先吸附通过特定的相互作用。当颗粒受到保护时，暴露侧可以进一步改性以缀合去羧基封端的聚环氧乙烷（PEO）。这两种连接通过共价键变得牢固。亲水性的PEO和疏水性的PS链被明显地分隔在Fe30O4@SiO2颗粒的相对侧上。作为一种磁响应固体表面活性剂，稳定的乳液可以用磁体驱动，随着磁场强度的增加而定向运动和聚结。该方法可以推广到其他具有可调有机材料和固体颗粒的Janus粒子。
We report a method to prepare polymer/inorganic Janus particles by transferring self-assembled membranes of copolymers such as PS-b-PAA at an emulsion interface when the amine-capped particles such as paramagnetic Fe3O4@SiO2 core/shell particles are preferentially adsorbed by specific interactions. While the particles are protected, the exposed side can be further modified to conjugate aldehyde-capped polyethylene oxide (PEO). Both connections become robust by covalent bonds. The hydrophilic PEO and hydrophobic PS chains are distinctly compartmentalized onto the opposite sides of the Fe30O4@SiO2 particles. As a magnetic responsive solid surfactant, the stabilized emulsions can be driven with a magnet for directional movement and coalescence with increasing magnetic strength. This method can be extended to other Janus particles with tunable organic materials and solid particles.