Strain sensor with self-healing ability using a dry-resistant hydrogel-based conductive composite
발표자
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초록
내용
Poly (vinyl alcohol) (PVA) based hydrogel is widely used in devices requiring self-healing abilities. However, agarose/PVA-based hydrogels are made based on water, so moisture evaporates easily and has the disadvantage that it cannot be used for a long time. In this study, 1,2,3,4-butane tetracarboxylic acid (BTCA) and sodium (polyacrylate) (SPA) were added to a PVA-based hydrogel to increase drying resistance. Drying resistance was measured by measuring the weight of the hydrogel while storing the hydrogel at 25 °C and 40 °C for 24 hours. As a result, the drying resistance (Wt/Wt = 0) of the agarose/PVA-based hydrogel using water as a single solvent changed from 0.84 at 25 °C to 0.34 at 40 °C. However, Hydrogels added with BTCA and SPA changed to 0.95 at 25 °C and 0.69 and 0.73 at 40°C, respectively. Then, CNT was added to the produced hydrogel to give conductivity, and it was applied as a strain sensor based on the stretchability and self-healing ability of the hydrogel.