期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 29, 页码 11876-11880出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202004122
关键词
anti-icing; organogels; phase separation; switchable lubrication; thermosecreting materials
资金
- National Natural Science Funds for Distinguished Young Scholar [21725401]
- National Key R&D Program of China [2017YFA0207800]
- 111 project [B14009]
- China Postdoctoral Science Foundation [2017M620012]
- Fundamental Research Funds for the Central Universities
Synthetic gels with switchable interfacial properties have great potential in smart devices and controllable transport. Herein, we design an organogel by incorporating a binary liquid mixture with an upper critical solution temperature (UCST) into a polymer network, resulting in reversible modulation of lubrication and adhesion properties. As the temperature changes, the lubricating mechanism changes reversibly from boundary lubrication to hydrodynamic lubrication due to phase separation within the binary solution permeating the gel (friction coefficient 0.4-0.03). Droplets appear on the gel surface at low temperature and disappear with temperature higher than the critical phase separation temperature (T-ps) of the organogel. The organogel possesses a relatively low ice adhesive strength (less than 1 kPa). This material has potential applications in anti-icing and smart devices, and we believe that this design strategy can be expanded to other systems such as aqueous solutions and hydrogels.
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