Anti-freezing and self-healing nanocomposite hydrogels based on poly(vinyl alcohol) for highly sensitive and durable flexible sensors

Nie, Yu; Yue, Dongqi; Xiao, Wu; Wang, Wenxiang; Hou, Chen; Bai, Liangjiu; Yang, Lixia; Yang, Huawei; Wei, Daming

doi:10.1016/j.cej.2022.135243

Cited by 106 publications

(50 citation statements)

References 65 publications

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“…The response time of the hydrogel is provided in Figure S2, which is 200 and 300 ms during loading and unloading, respectively. The response time is comparable to that reported in other works. , …”

Section: Resultsmentioning

confidence: 99%

“…The response time is comparable to that reported in other works. 55,58 When the hydrogel was attached to the joints of volunteers, such as the elbow, knee, finger, wrist, and throat, the movement of the volunteers could be easily monitored by capturing the output signal (ΔR/R 0 ). The output signal is repeatable and covers a wide range from zero to a few hundred.…”

Section: Acs Applied Polymer Materialsmentioning

confidence: 99%

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Multiple Physical Bonds Cross-Linked Strong and Tough Hydrogel with Antibacterial Ability for Wearable Strain Sensor

Zou

Chang

Liu

et al. 2022

ACS Appl. Polym. Mater.

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Strong, tough, and antibacterial hydrogels are promising in the fields of human motion detection and wearable electronics. However, it remains challenging to reach the antibacterial ability without losing the mechanical properties. In this work, strong and tough Fe3+-sodium alginate/poly(acrylamide-co-acrylic acid)/Ag nanowire (Fe3+-SA/P(Am-co-Ac)/AgNWs) hydrogel with antibacterial ability was facially prepared using multiple physical bonds. The superior mechanical properties are ensured by the double network matrix and well-designed interface between the matrix and AgNWs. The antibacterial ability was realized by the introduction of AgNWs. The matrix contains the Fe3+-SA network and the Fe3+-P(Am-co-Ac) network, which are further united together via the shared Fe3+ based ionic interaction. The interfacial defects between AgNWs and the organic matrix were efficiently eliminated by the incorporation of bis (acryloyl)cystamine (BACA) as “bridge” molecules: the CC bond on BACA was grafted onto the main chain of P(Am-co-Ac) by free radical polymerization, and the S–S bond on BACA was anchored onto the surface of AgNWs through the Ag–S metal ligand effect. Benefiting from the multiple physical bonds and well-designed interface, the as-prepared hydrogel exhibited a stretching strength of 3.87 MPa, an elongation at break of 3127%, and a fracture energy of 112.32 MJ m–3. The bacteriostatic ratio of the as-prepared hydrogel against E. coli and S. aureus bacteria was as high as 99.98% and 99.95%. Moreover, the hydrogel displayed a conductivity and strain sensitivity (GF) of 0.01 and 0.59, a broad working range of 0–500%, and 500 cycles of loading–unloading under a strain of 40%, enabling the hydrogel to be sensitive on a large scale and with subtle body movements and making hydrogel the perfect strain sensor to monitor various human motions.

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Section: Resultsmentioning

confidence: 99%

Section: Acs Applied Polymer Materialsmentioning

confidence: 99%

Multiple Physical Bonds Cross-Linked Strong and Tough Hydrogel with Antibacterial Ability for Wearable Strain Sensor

Zou

Chang

Liu

et al. 2022

ACS Appl. Polym. Mater.

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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%

Wearable, fast-healing, and self-adhesive multifunctional photoactive hydrogel for strain and temperature sensing

Zhu

Sun

et al. 2022

J. Mater. Chem. A

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“…24–26 Nie et al successfully fabricated polyvinyl alcohol/CNCs@PDDA/PA nanocomposite hydrogels by facile freeze–thaw cycle in a water/glycerol binary solvent system. 27 The hydrogel could monitor human motion signals at −30 °C. Zhang et al manufactured a hydrogel with anti-freezing and anti-drying abilities in water/glycerol solvent using natural glycyrrhizic acid and polyvinyl alcohol as raw materials.…”

Section: Introductionmentioning

confidence: 99%

Highly conductive hydrogel sensors driven by amylose with freezing and dehydration resistances

Gao

Zhang

et al. 2022

J. Mater. Chem. C

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Anti-freezing and self-healing nanocomposite hydrogels based on poly(vinyl alcohol) for highly sensitive and durable flexible sensors

Cited by 106 publications

References 65 publications

Multiple Physical Bonds Cross-Linked Strong and Tough Hydrogel with Antibacterial Ability for Wearable Strain Sensor

Multiple Physical Bonds Cross-Linked Strong and Tough Hydrogel with Antibacterial Ability for Wearable Strain Sensor

Wearable, fast-healing, and self-adhesive multifunctional photoactive hydrogel for strain and temperature sensing

Highly conductive hydrogel sensors driven by amylose with freezing and dehydration resistances

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