Strong and tough fully physically crosslinked double network hydrogels with tunable mechanics and high self-healing performance

Wang, Xiaohui; Song, Fei; Qian, Dong; He, Yao-Dong; Nie, Wu-Cheng; Wang, Yu‐Zhong

doi:10.1016/j.cej.2018.05.081

Cited by 185 publications

(83 citation statements)

References 51 publications

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“…Also, it is expected to solve the gel‐living tissue interface problem in tissue engineering, repair regional damage to the material because of extreme external conditions, and restore the damaged gel to its normal function. This property endows self‐healing hydrogels with multiple functions such as intelligence, efficiency, and environmental friendliness …”

Section: Introductionmentioning

confidence: 99%

Poly(acrylic acid)‐chitosan @ tannic acid double‐network self‐healing hydrogel based on ionic coordination

Zhang

et al. 2020

Polymers for Advanced Techs

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In this work, poly(acrylic) acid-chitosan @ tannic acid-aluminum ion (PAA-CS@TA-Al 3+ ) double-network hydrogel was prepared via prefabrication, blending method, and Al 3+ immersion method. The interaction between chitosan and tannic acid (CS@TA) was analyzed using Fourier transfer infrared spectra and UV-Vis spectra. The UV-Vis spectrum was also used to confirm the formation of ionic coordination in the gel. Then, the possible coordination modes were studied and analyzed. The microscopic pore structure and macroscopic strain behavior of the gel were analyzed using SEM and tensile testing, respectively, which verified that the tensile strength (≈32 KPa) and elongation at break (≈1700%) of the gel primarily resulted from its crosslinking structure. In addition, the gel also demonstrated a good self-healing performance with recovery ≈92.2% at 60 minutes.Hence, the proposed novel self-healing gel can provide inspiration for the preparation of future self-healing gels. K E Y W O R D Schitosan, double-network hydrogel, ionic coordination, self-healing, tannic acid

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Section: Introductionmentioning

confidence: 99%

Poly(acrylic acid)‐chitosan @ tannic acid double‐network self‐healing hydrogel based on ionic coordination

Zhang

et al. 2020

Polymers for Advanced Techs

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“…. For all hydrogels, G ′ is much larger than G ″ over the entire frequency range, revealing the solid‐like elastic nature of the gel . At low frequency, the G ′ value increases as the frequency increases, while there is an almost frequency‐independent G ′ value at high frequency.…”

Section: Resultsmentioning

confidence: 88%

“…The dynamic metal‐coordination bonds allow the hydrogel to break and reform during the deformation, which would lead to the unfolding and sliding of polymer chains. So the energy upon deformation can be dissipated though disentangling ionic bonds between Fe 3+ and COO − , which endows with high elasticity to the PAA‐Fe 3+ /Gelatin/PVA triple‐network hydrogel . With increasing Fe 3+ concentration, the crosslinking density of the first network increases.…”

Section: Resultsmentioning

confidence: 99%

“…The fracture strength and compressive strength of the prepared hydrogels reached 1263 ± 59 kPa and 140 ± 3 MPa, and the elongation at break could reach 3406 ± 143% and the compressive strain at break was over 99.9%. Wang et al . synthesized double‐network physically crosslinked chitosan‐based hydrogels through metal coupling and entanglement between polymer molecular chains, and found that the prepared hydrogels have good mechanical properties and exhibit the typical mechanical properties of elastomers.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of poly(acrylic acid)–Fe³⁺/gelatin/poly(vinyl alcohol) triple‐network supramolecular hydrogels with high toughness, high strength and self‐healing properties

Jing

Zhang

Liang

et al. 2019

Polymer International

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Hydrogels with good mechanical and self‐healing properties are of great importance for various applications. Poly(acrylic acid)–Fe3+/gelatin/poly(vinyl alcohol) (PAA‐Fe3+/Gelatin/PVA) triple‐network supramolecular hydrogels were synthesized by a simple one‐pot method of copolymerization, cooling and freezing/thawing. The PAA‐Fe3+/Gelatin/PVA triple‐network hydrogels exhibit superior toughness, strength and recovery capacity compared to single‐ and double‐network hydrogels. The mechanical properties of the synthesized hydrogels could be tailored by adjusting the compositions. The PAA‐Fe3+/Gelatin/PVA triple‐network hydrogel with 0.20 mmol Fe3+, 3% gelatin and 15% PVA could achieve good mechanical properties, the tensile strength and elongation at break being 239.6 kPa and 12.8 mm mm−1, respectively, and the compression strength reaching 16.7 MPa under a deformation of about 91.5%. The synthesized PAA‐Fe3+/Gelatin/PVA triple‐network hydrogels have good self‐healing properties owing to metal coordination between Fe3+ and carboxylic groups, hydrogen bonding between the gelatin chains and hydrogen bonding between the PVA chains. Healed PAA‐Fe3+(0.20)/Gelatin3%/PVA15% triple‐network hydrogels sustain a tensile strength of up to 231.4 kPa, which is around 96.6% of the tensile strength of the original samples. Therefore, the synthesized triple‐network supramolecular hydrogels would provide a new strategy for gel research and expand the potential for their application. © 2019 Society of Chemical Industry

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“…The prepared hydrogels exhibited a fracture stress of 1.4 MPa and an elongation at rupture of ~700 % after self-recovery. 30 Gong et al prepared a poly(acrylamide-co-acrylic acid) (PAM-co-PAA)/poly(vinyl alcohol) (PVA) DN hydrogels through a facile two-step approach (copolymerization and freezing/thawing) to endow hydrogels with high mechanical, fatigue resistance, and self-recovery properties. 31 Despite the promising results, few existing DPC-DN have demonstrated their extended applications in the biomedical field, mainly due to the lack of bioactive components for cell growth.…”

Section: Introductionmentioning

confidence: 99%

Dual Physically Cross-Linked κ-Carrageenan-Based Double Network Hydrogels with Superior Self-Healing Performance for Biomedical Application

Deng¹,

Huang²,

Sun

et al. 2018

ACS Appl. Mater. Interfaces

149

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Chemically linked Double network (DN) hydrogels display extraordinary mechanical attributes but mostly suffer from poor self-healing property and unsatisfactory biocompatibility due to the irreversible breaks in their chemical-linked networks and the use of toxic chemical crosslinking agents. To address these limitations, we developed a novel κcarrageenan/polyacrylamide (KC/PAM) DN hydrogel through a dual physical-crosslinking strategy, with the ductile, hydrophobically associated PAM being the first network, and the rigid potassium ion (K +) cross-linked KC being the second network. The dual physically cross-linked DN (DPC-DN) hydrogels with optimized KC concentration exhibit excellent fracture tensile stress (1320 ± 46 kPa) and toughness (fracture energy: 6900 ± 280 kJ/m 3), comparable to those fully chemically linked DN hydrogels and physically-chemically cross-linked hybrid DN hydrogels. Moreover, owing to their unique dual physical-crosslinking structures, the KC/PAM hydrogels also demonstrated rapid self-recovery, remarkable notch-insensitivity, self-healing capability, as well as excellent cytocompatibility towards stem cells. Accordingly, this work presents a new strategy towards fabricating self-repairing DPC-DN hydrogels with outstanding mechanical behaviors and biocompatibility. The new type of DN hydrogels demonstrates strong potentiality in many challenging biomedical applications such as artificial diaphragm, tendon, and cartilage.

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Strong and tough fully physically crosslinked double network hydrogels with tunable mechanics and high self-healing performance

Cited by 185 publications

References 51 publications

Poly(acrylic acid)‐chitosan @ tannic acid double‐network self‐healing hydrogel based on ionic coordination

Poly(acrylic acid)‐chitosan @ tannic acid double‐network self‐healing hydrogel based on ionic coordination

Synthesis of poly(acrylic acid)–Fe³⁺/gelatin/poly(vinyl alcohol) triple‐network supramolecular hydrogels with high toughness, high strength and self‐healing properties

Dual Physically Cross-Linked κ-Carrageenan-Based Double Network Hydrogels with Superior Self-Healing Performance for Biomedical Application

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Strong and tough fully physically crosslinked double network hydrogels with tunable mechanics and high self-healing performance

Cited by 185 publications

References 51 publications

Poly(acrylic acid)‐chitosan @ tannic acid double‐network self‐healing hydrogel based on ionic coordination

Poly(acrylic acid)‐chitosan @ tannic acid double‐network self‐healing hydrogel based on ionic coordination

Synthesis of poly(acrylic acid)–Fe3+/gelatin/poly(vinyl alcohol) triple‐network supramolecular hydrogels with high toughness, high strength and self‐healing properties

Dual Physically Cross-Linked κ-Carrageenan-Based Double Network Hydrogels with Superior Self-Healing Performance for Biomedical Application

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Synthesis of poly(acrylic acid)–Fe³⁺/gelatin/poly(vinyl alcohol) triple‐network supramolecular hydrogels with high toughness, high strength and self‐healing properties