Poly(N-isopropylacrylamide) Hydrogel for Diving/Surfacing Device
- Title
- Poly(N-isopropylacrylamide) Hydrogel for Diving/Surfacing Device
- Author
- 장용우
- Keywords
- poly(N-isopropylacrylamide); hydrogel; diving/surfacing device
- Issue Date
- 2021-02
- Publisher
- MDPI
- Citation
- MICROMACHINES, v. 12, NO 2, article no. 210, page. 1-10
- Abstract
- Underwater robots and vehicles have received great attention due to their potential applications in remote sensing and search and rescue. A challenge for micro aquatic robots is the lack of small motors needed for three-dimensional locomotion in water. Here, we show a simple diving and surfacing device fabricated from thermo-sensitive poly(N-isopropylacrylamide) or a poly(N-isopropylacrylamide)-containing hydrogel. The poly(N-isopropylacrylamide)-containing device exhibited fast and reversible diving/surfacing cycles in response to changing temperature. Modulation of the interaction between poly(N-isopropylacrylamide) chains and water molecules at temperatures above or below the lower critical solution temperature regulates the gel density through the swelling and de-swelling. The gel surfaced in water when heated and sank when cooled. We further showed reversible diving/surfacing cycles of the device when exposed to electrical and ultrasonic stimuli. Finally, a small electrically heated gel was incorporated into a miniature submarine and used to control the diving depth. These results suggest that the poly(N-isopropylacrylamide)-containing device has good potential for underwater remote-controlled micro aquatic robots.
- URI
- https://www.mdpi.com/2072-666X/12/2/210/htmhttps://repository.hanyang.ac.kr/handle/20.500.11754/175802
- ISSN
- 2072-666X
- DOI
- 10.3390/mi12020210
- Appears in Collections:
- COLLEGE OF MEDICINE[S](의과대학) > MEDICINE(의학과) > Articles
- Files in This Item:
- Poly(N-isopropylacrylamide) Hydrogel for DivingSurfacing Device.pdfDownload
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