Fan Jun-Bing, Song Yongyang, Liu Hong, Lu Zhongyuan, Zhang Feilong, Liu Hongliang, Meng Jingxin, Gu Lin, Wang Shutao, Jiang Lei
CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Sci Adv. 2017 Jun 21;3(6):e1603203. doi: 10.1126/sciadv.1603203. eCollection 2017 Jun.
Emulsion polymerization is the most widely used synthetic technique for fabricating polymeric particles. The interfacial tension generated with this technique limits the ability to tune the topology and chemistry of the resultant particles. We demonstrate a general emulsion interfacial polymerization approach that involves introduction of additional anchoring molecules surrounding the microdroplets to synthesize a large variety of Janus particles with controllable topological and chemical anisotropy. This strategy is based on interfacial polymerization mediated by an anchoring effect at the interface of microdroplets. Along the interface of the microdroplets, the diverse topology and surface chemistry features of the Janus particles can be precisely tuned by regulating the monomer type and concentration as well as polymerization time. This method is applicable to a wide variety of monomers, including positively charged, neutrally charged, and negatively charged monomers, thereby enriching the community of Janus particles.
乳液聚合是制备聚合物颗粒最广泛使用的合成技术。该技术产生的界面张力限制了调节所得颗粒拓扑结构和化学性质的能力。我们展示了一种通用的乳液界面聚合方法，该方法涉及在微滴周围引入额外的锚定分子，以合成具有可控拓扑和化学各向异性的多种Janus颗粒。该策略基于微滴界面处锚定效应介导的界面聚合。沿着微滴界面，可以通过调节单体类型、浓度以及聚合时间来精确调整Janus颗粒的不同拓扑结构和表面化学特征。该方法适用于多种单体，包括带正电、中性和带负电的单体，从而丰富了Janus颗粒群体。
