期刊
ACS APPLIED POLYMER MATERIALS
卷 2, 期 6, 页码 2338-2349出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.0c00288
关键词
hard elastic polymers; mesoporous polymers; mechanoresponsive materials; nanocomposites; antibacterial materials; fluorescent materials
资金
- Russian Foundation of Basic Research [19-03-00337_a, 20-03-00541_a]
- Russian Science Foundation [20-13-00178]
- Russian Science Foundation [20-13-00178] Funding Source: Russian Science Foundation
This work offers an alternative strategy for the preparation of hard elastic (HE) materials via environmental intercrystallite crazing and subsequent spontaneous strain recovery. Structure and properties of HE materials are characterized: secondary loading in air is accompanied by the development of porosity (up to 40%) with pores below 20 nm; upon unloading, the as-opened porous structure is closed in the elastic manner (strain recovery up to 90%). Upon loading/unloading cycles, the HE samples behave as living mechanoresponsive materials with openable and closable mesopores. This strategy has proved to be universal for diverse semicrystalline polymers [high-density polyethylene, polypropylene, poly(tetrafluoroethylene)]. The phenomenon of the forced impregnation of polymer matrixes with target cargo upon cyclic loading offers benefits for the incorporation of diverse additives when the overall uptake can be increased by 500%. The mechanism behind this phenomenon is discussed. Practical benefits of HE polymers and related nanocomposites as applied materials (including antibacterial and photoactive materials) are highlighted.
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