期刊
ADVANCED MATERIALS
卷 33, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202005973
关键词
nacre‐ mimetics; nanocomposites; oxygen barrier; room‐ temperature phosphorescence
类别
资金
- VW [A125456]
- China Scholarship Council (CSC)
- NSFC [21788102, 22020102006, 21722603]
- USIAS-FRIAS
- BMBF via a NanoMatFutur AktiPhotoPol research group [13N13522]
- Projekt DEAL
A novel waterborne strategy is introduced to fabricate low-cost nanocomposite films with room-temperature phosphorescence (RTP), allowing programmable retention times of RTP signals by adjusting the polymer/nanoclay ratio for information storage and anti-counterfeiting materials. The combination of bioinspired nanocomposite design with RTP materials overcomes limitations in organic RTP compound molecular design and adds programmable temporal features to RTP materials, paving the way for practical applications as novel anti-counterfeiting materials.
A generic, facile, and waterborne strategy is introduced to fabricate flexible, low-cost nanocomposite films with room-temperature phosphorescence (RTP) by incorporating waterborne RTP polymers into self-assembled bioinspired polymer/nanoclay nanocomposites. The excellent oxygen barrier of the lamellar nanoclay structure suppresses the quenching effect from ambient oxygen (k(q)) and broadens the choice of polymer matrices towards lower glass transition temperature (T-g), while providing better mechanical properties and processability. Moreover, the oxygen permeation and diffusion inside the films can be fine-tuned by varying the polymer/nanoclay ratio, enabling programmable retention times of the RTP signals, which is exploited for transient information storage and anti-counterfeiting materials. Additionally, anti-interception materials are showcased by tracing the interception-induced oxygen history that interferes with the preset self-erasing time. Merging bioinspired nanocomposite design with RTP materials contributes to overcoming the inherent limitations of molecular design of organic RTP compounds, and allows programmable temporal features to be added into RTP materials by controlled mesostructures. This will assist in paving the way for practical applications of RTP materials as novel anti-counterfeiting materials.
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