Tough and conductive nanocomposite hydrogels for human motion monitoring

Liu, Yu; Xiong, Xueru; Yu, Xianqiang; Sun, Xiangbin; Yang, Jia; Zhu, Lin; Qin, Gang; Dai, Yahui; Chen, Qiang

doi:10.1016/j.polymertesting.2019.01.022

Cited by 28 publications

(17 citation statements)

References 36 publications

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“…The PDMAA/Laponite NC hydrogel has the maximum elongation at break at a Laponite content of 5 % and could be stretched to approximately 40 times than the original length. The superior mechanical properties are due to the addition of Laponite which increases the crosslinking sites of the hydrogel network, and effectively avoids stress concentration [15] …”

Section: Resultsmentioning

confidence: 99%

Highly Stretchable and Adhesive Poly (N, N‐dimethylacrylamide)/Laponite Nanocomposite Hydrogels for Wearable Sensor Devices

Zhou

Xie

et al. 2022

ChemistrySelect

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As a polymeric soft material, hydrogel is a good candidate for smart skin-like sensors. However, in practical applications conventional, hydrogels face the challenges of mechanical properties, poor electrical conductivity and inability to adhere well to the material surface to withstand high tensile strength. Therefore, the development of multifunctional hydrogels can solve some of these technical problems. In this work, we chose the nanoclay Laponite as a cross-linking agent and prepared poly (N, N-dimethylacrylamide)/Laponite nanocomposite (PDMAA/Laponite NC) hydrogels with excellent tensile (0.04 ∼ 0.08 MPa), adhesion (4.3 MPa) and electrochemical properties by initiating the free radical polymerization of polymer monomers under UV light. The hydrogel network is formed by multiple physical interactions between polymer chains and clay particles, conferring the reversible adhesion ability of the gel on various substrates. Considering the ease of preparation and comprehensive high performance, our nanocomposite hydrogels may have potential applications in wearable sensors and flexible electronic devices.

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Section: Resultsmentioning

confidence: 99%

Highly Stretchable and Adhesive Poly (N, N‐dimethylacrylamide)/Laponite Nanocomposite Hydrogels for Wearable Sensor Devices

Zhou

Xie

et al. 2022

ChemistrySelect

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“…As shown in Figure , based on the self-crosslinking of HEA and molecular template of PVA, multiple hydrogen bond cross-linked supramolecular PVA/PHEA HGE was prepared by a simple photopolymerization of HEA in the presence of PVA. In PVA/PHEA HGE, self-crosslinking monomer HEA contains two hydrophilic groups of hydroxyl and amide and can form multiple hydrogen bonds between its donors and receptors. − As shown in Figure S1, the FTIR spectrum of PHEA gel exhibited a broad characteristic peak representing the hydroxy group around 3599 cm –1 as well as characteristic peaks representing the amide group at 1666 and 1549 cm –1 . Moreover, the characteristic peaks of hydroxy group at 3396 cm –1 of PVA could be found.…”

Section: Resultsmentioning

confidence: 99%

Polyaniline-Decorated Supramolecular Hydrogel with Tough, Fatigue-Resistant, and Self-Healable Performances for All-In-One Flexible Supercapacitors

Yang

Sun

et al. 2020

ACS Appl. Mater. Interfaces

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122

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It is a challenge to realize high strength, toughness, and energy storage, as well as excellent capacitive self-recovery, fatigue-resistant, and self-healing performances simultaneously in a single all-in-one supercapacitor aiming for wearable electronics. Herein, based on the self-crosslinking and molecular template, a supramolecular poly(vinyl alcohol)/poly (N-hydroxyethyl acrylamide) (PVA/PHEA) hydrogel electrolyte (HGE) decorated by polyaniline (PANI) was prepared by in situ rapid polymerization of high-concentration aniline on the PVA/PHEA gel containing H2SO4. The multiple hydrogen bonds, rapid polymerization, and decoration endowed PANI-decorated PVA/PHEA HGE-based all-in-one flexible supercapacitor with the integrated high performances, which include high specific capacitance, good cycling stability, high strength, excellent toughness, rapid self-recovery, excellent fatigue-resistant, and self-healing capabilities, as well as high capacitance retention during or after the large deformations or after the self-healing. Thus, the current work presents a novel and promising strategy to design the integrated high-performance supercapacitors aiming for wearable electronics.

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“…BSA (98%) and bromophenol blue (BPB) were purchased from Sigma Aldrich Inc. Albumin from milk (MA), albumin from dried egg white (OVA), EDC (>98.0%), and NHS (>98.0%) were purchased from TCI (Shanghai) Inc. Guanidine hydrochloride (GdnHCl, 99.0%), urea (99%) and sodium dodecyl sulfate (SDS, 92.5–100.5%) were purchased from Aladdin (Shanghai) Inc. SF and PEDOT/PSS were prepared according to the previous work. [ 35 , 45 ] Graphene quantum dot (GQD) was kindly provided by Dr. Fengna Xi's group at Zhejiang Sci‐Tech University. All materials were used without further purification.…”

Section: Methodsmentioning

confidence: 99%

A General Protein Unfolding‐Chemical Coupling Strategy for Pure Protein Hydrogels with Mechanically Strong and Multifunctional Properties

Tang

Zhu

et al. 2021

Advanced Science

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Protein-based hydrogels have attracted great attention due to their excellent biocompatible properties, but often suffer from weak mechanical strength. Conventional strengthening strategies for protein-based hydrogels are to introduce nanoparticles or synthetic polymers for improving their mechanical strength, but often compromise their biocompatibility. Here, a new, general, protein unfolding-chemical coupling (PNC) strategy is developed to fabricate pure protein hydrogels without any additives to achieve both high mechanical strength and excellent cell biocompatibility. This PNC strategy combines thermal-induced protein unfolding/gelation to form a physically-crosslinked network and a -NH2/-COOH coupling reaction to generate a chemicallycrosslinked network. Using bovine serum albumin (BSA) as a globular protein, PNC-BSA hydrogels show macroscopic transparency, high stability, high mechanical properties (compressive/tensile strength of 115/0.43 MPa), fast stiffness/toughness recovery of 85%/91% at room temperature, good fatigue resistance, and low cell cytotoxicity and red blood cell hemolysis. More importantly, the PNC strategy can be not only generally applied to silk fibroin, ovalbumin, and milk albumin protein to form different, high strength protein hydrogels, but also modified with PEDOT/PSS nanoparticles as strain sensors and fluorescent fillers as color sensors. This work demonstrates a new, universal, PNC method to prepare high strength, multi-functional, pure protein hydrogels beyond a few available today.

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Tough and conductive nanocomposite hydrogels for human motion monitoring

Cited by 28 publications

References 36 publications

Highly Stretchable and Adhesive Poly (N, N‐dimethylacrylamide)/Laponite Nanocomposite Hydrogels for Wearable Sensor Devices

Highly Stretchable and Adhesive Poly (N, N‐dimethylacrylamide)/Laponite Nanocomposite Hydrogels for Wearable Sensor Devices

Polyaniline-Decorated Supramolecular Hydrogel with Tough, Fatigue-Resistant, and Self-Healable Performances for All-In-One Flexible Supercapacitors

A General Protein Unfolding‐Chemical Coupling Strategy for Pure Protein Hydrogels with Mechanically Strong and Multifunctional Properties

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