Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 114, Issue 23, Pages 5900-5905Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1703616114
Keywords
colloidal crystal; self-healing; inverse opal; structural color; hydrogel
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Funding
- National Science Foundation of China [21473029, 51522302]
- NSAF Foundation of China [U1530260]
- National Science Foundation of Jiangsu [BK20140028]
- Program for New Century Excellent Talents in University
- Scientific Research Foundation of Southeast University
- Scientific Research Foundation of the Graduate School of Southeast University [YBJJ1671]
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Biologically inspired self-healing structural color hydrogels were developed by adding a glucose oxidase (GOX)- and catalase (CAT)-filled glutaraldehyde cross-linked BSA hydrogel into methacrylated gelatin (GelMA) inverse opal scaffolds. The composite hydrogel materials with the polymerized GelMA scaffold could maintain the stability of an inverse opal structure and its resultant structural colors, whereas the protein hydrogel filler could impart self-healing capability through the reversible covalent attachment of glutaraldehyde to lysine residues of BSA and enzyme additives. A series of unprecedented structural color materials could be created by assembling and healing the elements of the composite hydrogel. In addition, as both the GelMA and the protein hydrogels were derived from organisms, the composite materials presented high biocompatibility and plasticity. These features of self-healing structural color hydrogels make them excellent functional materials for different applications.
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