The preparation of dual cross-linked high strain composite gel with manifold excellent properties and its application as a strain sensor

Hu, Ruofei; Ji, Guochen; Zhao, Jing; Gu, Xing; Lian-wen, Zhou; Jiao, Zheng

doi:10.1016/j.compscitech.2021.109110

Cited by 13 publications

(9 citation statements)

References 46 publications

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“…Phytic acid (PA) in hydrogel-based strain sensors. Lu et al reported that the oxygen in the dihydrogen phosphate moieties of PA forms H bonds with the H in the -OH groups of PVA, 217,264 the -COOH groups of PAA, 219 or the -NH 2 groups of PAM and polyaniline 121,[265][266][267] contributing to physical cross-linking in the hydrogel networks. The ability of PA to provide hydrogels with ionic conductivity is attributed to its acidic nature, which donates H + ions to the aqueous phase of the hydrogels.…”

Section: Discussionmentioning

confidence: 99%

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Zaidi¹,

Saeed²,

Heo³

et al. 2023

J. Mater. Chem. A

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Section: Discussionmentioning

confidence: 99%

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Zaidi¹,

Saeed²,

Heo³

et al. 2023

J. Mater. Chem. A

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“…The broad absorption bands around 3050-3700 cm -1 caused by the stretching vibration of -NH and -OH groups appear in all three gels. They are attributed to the hydrogen bonding interaction between -COOH groups in the PAA chains and/or to Fmoc-FF molecules [32][33][34]. The appearance of a broad peak around 2950 cm -1 in the PAA/FF gel is assigned to more hydrogen bonding between PAA and Fmoc-FF [35].…”

Section: Characterization Of the Paa/ff Gelmentioning

confidence: 96%

Poly(acrylic acid)/Dipeptide Double-Network Hydrogel to Achieve a Highly Stretchable Strain Sensor

2022

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Flexible and stretchable strain sensors can be applied for human health monitoring and disease diagnoses via the output of multiple biophysical signals. However, it is still a challenge to fabricate short-peptide-based strain sensors. Here, we prepared a novel polymer-dipeptide double-network hydrogel with excellent stretchability, responsiveness, and stability. The poly(acrylic acid) (PAA) gel, by cross-linking, maintains mechanical and flexible properties, and the fluorenyl methoxycarbonyl-diphenylalanine (Fmoc-FF) network, by non-covalent interactions, is helpful for energy dissipation. With increasing tensile or compression strains, the PAA/Fmoc-FF hydrogel exhibited a high mechanical strength and fast recovery. Moreover, as the presence of KCl improves the electronic conductivity, the hybrid gel exhibited a cyclic strain-stress performance, which is the foundation of a strain sensor. Based on that, its application as a motion sensor was demonstrated by monitoring the movements of human joints, such as the forefinger, wrist, elbow, and knee. Consequently, the hybrid polymer-peptide gel could be an ideal candidate for wearable sensors in the future.

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“…However, intrinsic brittleness and nonideal mechanical properties of gels limit their utilization [ 5 , 6 , 7 ]. Robust mechanical properties, including high strength, stretchability, and toughness, are critical for meeting practical demands [ 8 , 9 , 10 ]. To overcome the challenges above, many efforts have been devoted to improving mechanical properties of gel through various strategies [ 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

A Polyvinyl Alcohol–Tannic Acid Gel with Exceptional Mechanical Properties and Ultraviolet Resistance

Tian

Wang

et al. 2022

Gels

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Design and preparation of gels with excellent mechanical properties has garnered wide interest at present. In this paper, preparation of polyvinyl alcohol (PVA)–tannic acid (TA) gels with exceptional properties is documented. The crystallization zone and hydrogen bonding acted as physical crosslinkages fabricated by a combination of freeze–thaw treatment and a tannic acid compound. The effect of tannic acid on mechanical properties of prepared PVA–TA gels was investigated and analyzed. When the mass fraction of PVA was 20.0 wt% and soaking time was 12 h in tannic acid aqueous solution, tensile strength and the elongation at break of PVA–TA gel reached 5.97 MPa and 1450%, respectively. This PVA–TA gel was far superior to a pure 20.0 wt% PVA hydrogel treated only with the freeze–thaw process, as well as most previously reported PVA–TA gels. The toughness of a PVA–TA gel is about 14 times that of a pure PVA gel. In addition, transparent PVA–TA gels can effectively prevent ultraviolet-light-induced degradation. This study provides a novel strategy and reference for design and preparation of high-performance gels that are promising for practical application.

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The preparation of dual cross-linked high strain composite gel with manifold excellent properties and its application as a strain sensor

Cited by 13 publications

References 46 publications

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Poly(acrylic acid)/Dipeptide Double-Network Hydrogel to Achieve a Highly Stretchable Strain Sensor

A Polyvinyl Alcohol–Tannic Acid Gel with Exceptional Mechanical Properties and Ultraviolet Resistance

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