A cyclic freezing-thawing approach to layered Janus hydrogel tapes with single-sided adhesiveness for wearable strain sensors

Wang, Mingcheng; Zhou, Hongwei; Du, Haotian; Chen, Lin; Zhao, Guoxu; Liu, Hanbin; Jin, Xilang; Chen, Weixing; Ma, Aibin

doi:10.1016/j.cej.2022.137163

Cited by 26 publications

(25 citation statements)

References 58 publications

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“…12,13 Although the bio-enzymatic reaction process is extremely mild, the hydrogel's mechanical strength is often relatively low. 14,15 The physical methods are always about self-assembly, 16 heating, 17 freezing-thawing 18 and so on, and the resultant hydrogels are formed mainly upon non-covalent bond interaction through a simple and easy process, avoiding the use of toxic crosslinkers. In addition, the mechanical strength of the network structure is improved compared to that of enzyme initiation.…”

Section: Introductionmentioning

confidence: 99%

An ultrasound-induced MXene doped PAM–SA super-tough hydrogel

Liu

et al. 2023

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

An ultrasound-induced MXene doped PAM–SA super-tough hydrogel

Liu

et al. 2023

J. Mater. Chem. C

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“…To further evaluate the adhesion properties of the hydrogel, the peeling forces of the hydrogels were compared with those of other reported conductive hydrogels (Figure e and Table ). − The peeling strength of the AAc a /Fe b /Li 2 SO 4 c hydrogel was superior to that of most reported hydrogels. The excellent adhesion performance of the AAc a /Fe b /Li 2 SO 4 c hydrogel makes it extremely favorable for application in wearable electronic devices.…”

Section: Resultsmentioning

confidence: 99%

Ultra-adhesive Poly(acrylic acid)-Based Hydrogel as a Flexible Sensor for Capturing Human-Motion Signal

Gao

Zhang

et al. 2023

ACS Appl. Polym. Mater.

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Conductive hydrogels are widely applied in wearable sensors, soft robotics, and human-interactive devices owing to their unique physicochemical properties. Herein, we prepared an ultra-adhesive poly(acrylic acid)/Fe b /Li 2 SO 4c hydrogel. The maximum peeling forces of the hydrogel with respect to an aluminum substrate and a titanium surface were 1380 and 1619 N•m −1 , respectively. The elongation at break of the hydrogel was 2450%, and the breaking stress was 98 kPa. Owing to the synergistic effect of the −COOH−Fe 3+ complex and H bonds, the prepared hydrogels exhibited self-healing properties. Because of the presence of lithium sulfate, the hydrogel exhibited electrical conductivity (up to 0.0195 S•cm −1 ). The hydrogel could be used as a strain sensor with a gauge factor of 21.12. The high sensitivity of the hydrogel enabled it to quickly respond to changes in the speed and angle of human joint movements. Therefore, the hydrogel sensor could capture signals from lowamplitude movements such as speaking, smiling, and frowning. The simple preparation strategy for an adhesive, self-healing, frostresistant, and conductive hydrogel reported herein can broaden the range of applications of wearable electronic devices.

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“…The wearable, self-healing, and adhesive photoactive PVA/d-CNT hydrogel was prepared by using a freeze-thawing method 29,30 with the assistance of sodium borate, lithium chloride, glycerol, and PDA-modied CNTs (Fig. 1).…”

Section: Resultsmentioning

confidence: 99%