Journal
ADVANCED MATERIALS
Volume 29, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201606900
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Funding
- NSF [DMR-1607475, CBET-1510099]
- National Nature Science Foundation of China [21504022]
- Henan Province [12B430007, 13A430015, 16IRTSTHN005, 17HASTIT006]
- Henan Polytechnic University [72105/001]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1607475] Funding Source: National Science Foundation
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A newly developed polyacrylamide-co-methyl acrylate/spiropyran (SP) hydrogel crosslinked by SP mechanophore demonstrates multi-stimuli-responsive and mechanically strong properties. The hydrogels not only exhibit thermo-, photo-, and mechano-induced color changes, but also achieve super-strong mechanical properties (tensile stress of 1.45 MPa, tensile strain of approximate to 600%, and fracture energy of 7300 J m(-2)). Due to a reversible structural transformation between spiropyran (a ring-close) and merocyanine (a ring-open) states, simple exposure of the hydrogels to white light can reverse color changes and restore mechanical properties. The new design approach for a new mechanoresponsive hydrogel is easily transformative to the development of other mechanophore-based hydrogels for sensing, imaging, and display applications.
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