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Poly(N-isopropylacrylamide) Hydrogel for Diving/Surfacing Device

Title
Poly(N-isopropylacrylamide) Hydrogel for Diving/Surfacing Device
Author
김선정
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/20.500.11754/175801
ISSN
2072-666X
DOI
10.3390/mi12020210
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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