Synthetic self-assembled homogeneous network hydrogels with high mechanical and recoverable properties for tissue replacement

Liu, Yanjun; Fu, Lian‐Hua; Liu, Shan; Meng, Lingyan; Li, Yayu

doi:10.1039/c6tb01249c

Cited by 17 publications

(11 citation statements)

References 36 publications

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“…Two relatively independent reactions were included in the preparation of F-hydrogels. On the one hand, the self-assembly was performed between the alcoholic hydroxyl side groups of the PVA chain and ketone groups of the PVP chain under acid catalysis, obtaining the 1, 3-dioxane polymers . On the other hand, the C6-OH groups on different CNCs molecular chains coordinated to Fe 3+ ions, resulting in the dynamic “Y” shaped coordinates.…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Wearable Soft Strain Sensors of Conductive, Self-healing, and Elastic Hydrogels with Synergistic “Soft and Hard” Hybrid Networks

Liu

Cao

et al. 2017

ACS Appl. Mater. Interfaces

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Robust, stretchable, and strain-sensitive hydrogels have recently attracted immense research interest because of their potential application in wearable strain sensors. The integration of the synergistic characteristics of decent mechanical properties, reliable self-healing capability, and high sensing sensitivity for fabricating conductive, elastic, self-healing, and strain-sensitive hydrogels is still a great challenge. Inspired by the mechanically excellent and self-healing biological soft tissues with hierarchical network structures, herein, functional network hydrogels are fabricated by the interconnection between a "soft" homogeneous polymer network and a "hard" dynamic ferric (Fe) cross-linked cellulose nanocrystals (CNCs-Fe) network. Under stress, the dynamic CNCs-Fe coordination bonds act as sacrificial bonds to efficiently dissipate energy, while the homogeneous polymer network leads to a smooth stress-transfer, which enables the hydrogels to achieve unusual mechanical properties, such as excellent mechanical strength, robust toughness, and stretchability, as well as good self-recovery property. The hydrogels demonstrate autonomously self-healing capability in only 5 min without the need of any stimuli or healing agents, ascribing to the reorganization of CNCs and Fe via ionic coordination. Furthermore, the resulted hydrogels display tunable electromechanical behavior with sensitive, stable, and repeatable variations in resistance upon mechanical deformations. Based on the tunable electromechanical behavior, the hydrogels can act as a wearable strain sensor to monitor finger joint motions, breathing, and even the slight blood pulse. This strategy of building synergistic "soft and hard" structures is successful to integrate the decent mechanical properties, reliable self-healing capability, and high sensing sensitivity together for assembling a high-performance, flexible, and wearable strain sensor.

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Section: Resultsmentioning

confidence: 99%

Ultrasensitive Wearable Soft Strain Sensors of Conductive, Self-healing, and Elastic Hydrogels with Synergistic “Soft and Hard” Hybrid Networks

Liu

Cao

et al. 2017

ACS Appl. Mater. Interfaces

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447

315

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“…Afterwards, sulfuric acid solution was added and experienced an immediate reaction with the assistance of microwave. Under the catalysis of sulfuric acid, the alcoholic hydroxyl groups (-OH) of the PVA chain and the keto groups (C=O) of the PVP chain self-assembled into 1,3-dioxane polymer [25]. Fourier Transform Infrared (FTIR) spectra of PVA, PVP, and the double-network hydrogel ( Figure S3) indicate that the characteristic peaks of PVA appear at 3273 cm -1 for -OH stretching vibration and 1316 cm -1 for C-O stretching vibration, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Herein, a simple two-step synthesis strategy of a microwave-assisted aldol condensation reaction [24,25] and freeze-thaw process [26] was proposed to synthesize a MXene-composited PVA/polyvinyl pyrrolidone (PVP) double-network hydrogel (MDN hydrogel). The resulting MDN hydrogel showed excellent mechanical properties of high stretchability, puncture resistance, and cyclic stability.…”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable, Elastic, and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

Zhao

et al. 2020

Research

135

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Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition. However, it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors. Herein, highly stretchable, sensitive, and multifunctional flexible strain sensors based on MXene- (Ti3C2Tx-) composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared. The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel, endowing the flexible sensor with high sensitivity. The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels. The resulting nanocomposited hydrogels featured great tensile performance (2400%), toughness, and resilience. Particularly, the as-prepared flexible pressure sensor revealed ultrahigh sensitivity (10.75 kPa-1) with a wide response range (0-61.5 kPa), fast response (33.5 ms), and low limit of detection (0.87 Pa). Moreover, the hydrogel-based flexible sensors, with high sensitivity and durability, could be employed to monitor full-range human motions and assembled into some aligned devices for subtle pressure detection, providing enormous potential in facial expression and phonation recognition, handwriting verification, healthy diagnosis, and wearable electronics.

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“…S2 † ). 39 And X-ray photoelectron spectroscopy (XPS) measurement was carried out to further investigate functional groups presented on the surface of as-prepared PPM-C. The whole XPS survey spectrum of the as-prepared PPM-C ( Fig.…”

Section: Resultsmentioning

confidence: 99%

A microwave synthesized mesoporous carbon sponge as an efficient adsorbent for Cr(vi) removal

Liu

et al. 2018

RSC Adv.

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a Mesoporous carbon materials have recently attracted immense research interest because of their potential application in water purification fields. Herein, we report the synthesis of a mesoporous carbon sponge (MCS) from a supramolecular microcrystalline cellulose-polymer system triggered by microwaveassisted treatment. Benefiting from the three-dimensional (3D) interconnected mesopores and an evenly distributed ball-like protuberance on the inner surfaces of the macropores, the MCS exhibited a high adsorption capacity (93.96 mg g À1 ) for fast Cr(VI) removal within 5 min. Additionally, the MCS can be regenerated and reused after the adsorption-desorption process, and maintained an adsorption capacity of $86% after 10 cycles. The high adsorption capacity, significantly reduced treatment time, and reusability make the MCS promising for the purification of wastewater on a large scale.

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Synthetic self-assembled homogeneous network hydrogels with high mechanical and recoverable properties for tissue replacement

Cited by 17 publications

References 36 publications

Ultrasensitive Wearable Soft Strain Sensors of Conductive, Self-healing, and Elastic Hydrogels with Synergistic “Soft and Hard” Hybrid Networks

Ultrasensitive Wearable Soft Strain Sensors of Conductive, Self-healing, and Elastic Hydrogels with Synergistic “Soft and Hard” Hybrid Networks

Highly Stretchable, Elastic, and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

A microwave synthesized mesoporous carbon sponge as an efficient adsorbent for Cr(vi) removal

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