Department of Bionano Technology, Hanyang University, Ansan, 15588, Republic of Korea.
Department of Chemical Engineering, Kyung Hee University, Yongin, 17104, Republic of Korea.
Angew Chem Int Ed Engl. 2016 Mar 24;55(14):4509-13. doi: 10.1002/anie.201600209. Epub 2016 Mar 1.
Janus particles endowed with controlled anisotropies represent promising building blocks and assembly materials because of their asymmetric functionalities. Herein, we show that using the seeded monomer swelling and polymerization technique allows us to obtain bi-compartmentalized Janus microparticles that are generated depending on the phase miscibility of the poly (alkyl acrylate) chains against the polystyrene seed, thus minimizing the interfacial free energy. When tetradecyl acrylate is used, complete compartmentalization into two distinct bulbs can be achieved, while tuning the relative dimension ratio of compartmented bulb against the whole particle. Finally, we have demonstrated that selectively patching the silica nanoparticles onto one of the bulb surfaces gives amphiphilicity to the particles that can assemble at the oil-water interface with a designated level of adhesion, thus leading to development of a highly stable Pickering emulsion system.
具有可控各向异性的杰纳修斯粒子因其不对称功能而成为有前途的构建块和组装材料。在此，我们表明，使用种子单体溶胀和聚合技术，可以获得双分隔的杰纳修斯微球，这些微球的形成取决于聚（烷基丙烯酸酯）链与聚苯乙烯种子之间的相混溶性，从而最小化界面自由能。当使用十四烷基丙烯酸酯时，可以完全分隔成两个不同的球，但要调整分隔球相对于整个粒子的相对维度比。最后，我们证明，选择性地将二氧化硅纳米粒子接枝到一个球的表面上，可以赋予粒子两亲性，使粒子能够在油水界面处组装，并具有指定的粘附力，从而形成高度稳定的 Pickering 乳液体系。
