期刊
MACROMOLECULES
卷 51, 期 7, 页码 2615-2620出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.8b00039
关键词
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资金
- National Natural Science Foundation of China [51773105, 51473083]
- Natural Science Foundation of Shandong Province [ZR2016EMM05]
- National Basic Research Program of China [2015CB654700, 2015CB654706]
- Significant Basic Research Program of Shandong province [ZR2017ZA0304]
- Taishan Scholar Program
Janus particles are promising for self-assembly at the liquid/liquid interface due to coexistence of the Pickering effect and the different wettability of both sides. In this study, we synthesize a Janus nanosheet and evaluate its ability to trap nonequilibrium morphology by interfacial self assembly. The Janus nanosheet was synthesized by selectively grafting polymer chains, polystyrene (PS) or polyisoprene (PI), on each side of a silica nanosheet. The selective grafting method endow the nanosheet with two different wettabilities, which make it ideal for self-assembly and further jamming at the PS/PI interface. The interfacial jamming of the nanosheet trapped the intermediate, nonequilibrium morphology during phase separation of the polymer blends. Compared to other Janus materials, the Janus nanosheet has higher interfacial activity and reduces the free energy of the system more effectively due to its 2D structure. Only 2 wt % of Janus nanosheet is required to break the threshold and reach the jammed state. The Janus nanosheet is easily scaled up and has potential as a compatibilizer in polymer materials.
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