Strain sensor with self-healing ability using a dry-resistant hydrogel-based conductive composite
발표자
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초록
내용
Self-healing hydrogels have attracted great attention for applications as electronic skin and flexible strain sensors due to their excellent flexibility and strain-sensitivity. In particular, Poly(vinyl alcohol) (PVA)-based hydrogels are widely used for devices that require self-healing ability. However, PVA-based hydrogels are made based on water, so the moisture evaporates easily and cannot be used for a long time. Here, 1,2,3,4-butanetetracarboxylic acid (BTCA) and sodium(polyacrylate) were added to the PVA-based hydrogel to increase drying resistance. Dry resistance (Wt/Wt = 0) was measured by weighing hydrogels while storing them at 25 and 40°C. As BTCA and SPA were added, the drying resistance changed from 0.88 to 0.95 at room temperature and from 0.33 to 0.77 at 40°C Then, the hydrogel was given conductivity by adding CNT and the strain sensor was able to detect various human motions.