Journal
MATERIALS RESEARCH EXPRESS
Volume 6, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/aaf17f
Keywords
self-healing; stretchability; double-crosslinked network; conductive hydrogel
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Funding
- National Key Research and Development Program of China [2017YFB037001]
- National Natural Science Foundation of China [91648109]
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Conductive self-healing hydrogels are a new type of functional material that combine self-healing with conductive properties. They are widely used in flexible and stretchable devices, which require not only self-healing properties and electrical conductivity but also good stretchability. In this study, we used a one-pot process to crosslink and polymerize trivalent iron (Fe3+) with acrylic acid (AA) and acrylamide (AM) into a dual network hydrogel P(AA-co-AM)/Fe3+, with both chemically and physically crosslinked networks. The obtained hydrogels exhibited excellent tensile properties (similar to 2000% stretchability) and rapid self-healing ability (complete healing at room temperature within 8 h). Furthermore, the Fe3+ gives the hydrogel good electrical conductivity. In addition, a capacitive pressure sensor using the hydrogel as a conductive active layer was fabricated, which proved its application in the field of wearable devices.
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