Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 36, Issue 24, Pages 2129-2136Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500390
Keywords
hydrogel; photoactive; photoprinting; self-shaping
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Funding
- National Natural Science Foundation of China [51173129, 21274105]
- National Natural Science Funds for Distinguished Young Scholar [51325305]
- Tianjin Municipal Natural Science Foundation [13ZCZDSY00900, 15JCZDJC38000]
- Research Fund for the Doctoral Program of Higher Education of China [20130032110006]
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A photocleavable terpolymer hydrogel cross-linked with o-nitrobenzyl derivative cross-linker is shown to be capable of self-shaping without losing its physical integrity and robustness due to spontaneous asymmetric swelling of network caused by UV-light-induced gradient cleavage of chemical cross-linkages. The continuum model and finite element method are used to elucidate the curling mechanism underlying. Remarkably, based on the self-changing principle, the photosensitive hydrogels can be developed as photoprinting soft and wet platforms onto which specific 3D characters and images are faithfully duplicated in macro/microscale without contact by UV light irradiation under the cover of customized photomasks. Importantly, a quick response (QR) code is accurately printed on the photoactive hydrogel for the first time. Scanning QR code with a smartphone can quickly connect to a web page. This photoactive hydrogel is promising to be a new printing or recording material.
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