期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 37, 页码 32161-32167出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b10198
关键词
shape memory polymers; cholesteric liquid crystals; semi-interpenetrating polymer network; mechanical embossing; stable colors
资金
- grant of Netherlands Foundation for Scientific Research (NWO)
A photonic shape memory polymer film that shows large color response (similar to 155 nm) in a wide temperature range has been fabricated from a semi-interpenetrating network of a cholesteric polymer and poly(benzyl acrylate). The large color response is achieved by mechanical embossing of the photonic film above its broad glass transition temperature. The embossed film, as it recovers to its original shape on heating through the broad thermal transition, exhibits multiple structural colors ranging from blue to orange. The relaxation behavior of the embossed film can be fully described using a Kelvin-Voigt model, which reveals that the influence of temperature on the generation of colors is much stronger than that of time, thereby producing stable multiple colors.
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