“Soaking-in-water” strategy stimulated starch/poly(vinyl alcohol)-based flexible hydrogel with heterogeneous network for highly sensitive underwater wearable sensor
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“Soaking-in-water” strategy stimulated starch/poly(vinyl alcohol)-based flexible hydrogel with heterogeneous network for highly sensitive underwater wearable sensor. / Li, Xueting; He, Rongtong; Liu, Xingxun; Blennow, Andreas; Ye, Qichao; Hong, Bingbing; Li, Xiaonan; Lu, Lu; Cui, Bo.
I: Sustainable Materials and Technologies, Bind 41, e01049, 2024.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - “Soaking-in-water” strategy stimulated starch/poly(vinyl alcohol)-based flexible hydrogel with heterogeneous network for highly sensitive underwater wearable sensor
AU - Li, Xueting
AU - He, Rongtong
AU - Liu, Xingxun
AU - Blennow, Andreas
AU - Ye, Qichao
AU - Hong, Bingbing
AU - Li, Xiaonan
AU - Lu, Lu
AU - Cui, Bo
N1 - Publisher Copyright: © 2024 Elsevier B.V.
PY - 2024
Y1 - 2024
N2 - Underwater wearable sensors utilizing conductive hydrogels have garnered significant attention in recent years. However, the response sensitivity to the mechanical strain, quantified by the gauge factor (GF), of most hydrogels is noticeably diminished when submerged in water, and little consideration has been given to the GF value of sensors operating both in air and underwater. Consequently, the development of underwater sensors with high sensitivity in aquatic environments remains a challenge. In this study, we propose a “soaking-in-water” strategy to enhance the sensitivity of the wearable sensor based on starch/poly(vinyl alcohol)/graphene oxide/ionic liquid hydrogel. Through this approach, the maximum GF of the hydrogel underwater was improved to 9.71, representing an 86.7% increase compared to the unsoaked hydrogel (GF of 5.20). Furthermore, the hydrogel demonstrated adjustable conductivity (from 0.26 to 1.82 S·m−1) and tensile properties (from 0.05 MPa at 244% to 0.21 MPa at 527%). The hydrogel underwent the processes of water-absorbing swelling, exudation of ionic liquid and water-repelling shrinkage. The enhancement in sensitivity and swelling mechanism of the hydrogel were closely linked to the movement of ions and water between the hydrogel and soaking water. Leveraging these properties, we further developed an underwater strain sensor capable of monitoring human motions underwater, offering quick, effective, and stable signal transmission. The proposed soaking method represents a promising avenue for improving the sensitivity of hydrogel sensors, providing a facile strategy for achieving accurate and efficient underwater monitoring applications.
AB - Underwater wearable sensors utilizing conductive hydrogels have garnered significant attention in recent years. However, the response sensitivity to the mechanical strain, quantified by the gauge factor (GF), of most hydrogels is noticeably diminished when submerged in water, and little consideration has been given to the GF value of sensors operating both in air and underwater. Consequently, the development of underwater sensors with high sensitivity in aquatic environments remains a challenge. In this study, we propose a “soaking-in-water” strategy to enhance the sensitivity of the wearable sensor based on starch/poly(vinyl alcohol)/graphene oxide/ionic liquid hydrogel. Through this approach, the maximum GF of the hydrogel underwater was improved to 9.71, representing an 86.7% increase compared to the unsoaked hydrogel (GF of 5.20). Furthermore, the hydrogel demonstrated adjustable conductivity (from 0.26 to 1.82 S·m−1) and tensile properties (from 0.05 MPa at 244% to 0.21 MPa at 527%). The hydrogel underwent the processes of water-absorbing swelling, exudation of ionic liquid and water-repelling shrinkage. The enhancement in sensitivity and swelling mechanism of the hydrogel were closely linked to the movement of ions and water between the hydrogel and soaking water. Leveraging these properties, we further developed an underwater strain sensor capable of monitoring human motions underwater, offering quick, effective, and stable signal transmission. The proposed soaking method represents a promising avenue for improving the sensitivity of hydrogel sensors, providing a facile strategy for achieving accurate and efficient underwater monitoring applications.
KW - Ions/water movement
KW - Sensitivity
KW - Starch-based hydrogels
KW - Swelling
KW - Underwater wearable sensor
U2 - 10.1016/j.susmat.2024.e01049
DO - 10.1016/j.susmat.2024.e01049
M3 - Journal article
AN - SCOPUS:85198534373
VL - 41
JO - Sustainable Materials and Technologies
JF - Sustainable Materials and Technologies
SN - 2214-9937
M1 - e01049
ER -
ID: 400216619