Progress in Janus Composites toward Interfacial Engineering
文献类型：期刊论文
| 作者 | Liang, Fu-xin; Yang, Zhen-zhong |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2017-06-20 |
| 期号 | 6页码:883-892 |
| 关键词 | Janus Composites Amphiphilic Functional Interface |
| 英文摘要 | Janus is named after the Roman god who is depicted to have two opposite faces looking at the past and the future. In 1991, de Gennes introduced the Janus particles in his Nobel lecture. Janus materials have triggered extensive research interests in academia and industry. Janus composites possess two different chemical regions and functions that are distinctly compartmentalized onto the same object. While the organic polymer components provide tunable wettability and responsive performances, the inorganic (or metallic) components offer desired functionalities such as magnetic manipulation and light thermal effect. We have developed methods to precisely tune shape, size, microstructure and chemistry of Janus composites and therefore their performance. In analogy to molecular surfactants or copolymers, the amphiphilic Janus composites can stabilize interfaces more effectively. Similarly, the Janus composites can serve as emulsifiers in emulsion polymerization and as compatibilizers for polymer alloys. Moreover, the interfaces stabilized with the Janus composites can be easily manipulated by using external stimuli, and functionalized by delivering desired species thereby. By grafting responsive polymer chains, the emulsions can be de-stabilized by simple changing pH, temperature, light irradiation or exchanging of ions. When Janus composites contain paramagnetic species, the emulsion droplets can be withdrawn with a magnet. The droplets are further coalesced, leading to de-emulsification under a stronger magnetic field. This performance is important to remedy polluted water or soil with organic species in the presence of surfactants. By conjugation of heterogeneous catalysts onto the Janus composites, the catalytic efficiency of the catalysts is greatly enhanced. Functional species such as Fe3O4 or Au nanoparticles (NPs) can be delivered toward an oil/water interface when these NPs are grafted with hydrophobic and thermally responsive chains such as PNIPAM at the opposite sides. The de-emulsification can be easily achieved under NIR irradiation even when the continuous phase temperature is below the LCST of PNIPAM (similar to 32 degrees C). The performance is enhanced from an interactive interplay between the hyperthermia effect of nanoparticles and a thermal energy transfer to fast locally heat PNIPAM. This performance is promising in heterogeneous catalysis and recycling of expensive catalysts. Wettability of Janus composites can be significantly magnified by nanoscale roughness. Robust superhydrophobic coatings are easily fabricated by forming a self-assembled monolayer of coarsening Janus microparticles and catalytic crosslinking the intermediate epoxy resin adhesive. In this Review, recent progress in manipulation of interfaces by Janus composites is summarized, including in emulsions and polymer alloys, interfacial heterogeneous catalysis, functional coatings, cell diagnosis and therapy. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39004]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liang, Fu-xin,Yang, Zhen-zhong. Progress in Janus Composites toward Interfacial Engineering[J]. ACTA POLYMERICA SINICA,2017(6):883-892. |
| APA | Liang, Fu-xin,&Yang, Zhen-zhong.(2017).Progress in Janus Composites toward Interfacial Engineering.ACTA POLYMERICA SINICA(6),883-892. |
| MLA | Liang, Fu-xin,et al."Progress in Janus Composites toward Interfacial Engineering".ACTA POLYMERICA SINICA .6(2017):883-892. |
入库方式： OAI收割
来源：化学研究所
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