Hydrophobic association mediated physical hydrogels with high strength and healing ability

Geng, Yuhui; Xiang, Lin; Pan, Pengju; Shan, Guorong; Bao, Yongzhong; Song, Yihu; Wu, Zi Liang; Zheng, Qiang

doi:10.1016/j.polymer.2016.08.022

Cited by 70 publications

(55 citation statements)

References 64 publications

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“…It is well known that physical hydrogels are viscoelastic materials assembled by non‐covalent interactions; the molecular chains have rebinding abilities; two independent gels could be “healed” when they are attached directly . After a period of time, the gels would fuse together firmly and almost become a whole.…”

Section: Introductionmentioning

confidence: 99%

Novel Self‐Healing, Shape‐Memory, Tunable Double‐Layer Actuators Based on Semi‐IPN and Physical Double‐Network Hydrogels

Zhang

Han

et al. 2018

Macro Materials & Eng

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In this paper, a series of physical hydrogels with semi‐interpenetrating polymer network (IPN) structures are first synthesized via micellar copolymerization. The semi‐IPN gels exhibit high strength, pH responsiveness, and self‐healing properties. Then, a series of physical double‐network (PDN) gels are further prepared by immersing the as‐prepared semi‐IPN gels in the solutions containing Ca2+ or Fe3+, respectively. The strengths and moduli of these PDN hydrogels are much higher than that of the semi‐IPN gels. Accordingly, the mechanical properties and swelling ratio of PDN gels can be tuned by changing the SA content and the types of metal ions in the immersing treatment. Based on the excellent self‐healing ability of the semi‐IPN gels, the double‐layer hydrogel actuators with shape‐memory properties are successfully fabricated through a simple healing‐immersing treatment, which has great potential application prospects in actuators, artificial muscles, and soft robots.

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Section: Introductionmentioning

confidence: 99%

Novel Self‐Healing, Shape‐Memory, Tunable Double‐Layer Actuators Based on Semi‐IPN and Physical Double‐Network Hydrogels

Zhang

Han

et al. 2018

Macro Materials & Eng

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“…To further improve the mechanical properties, a novel surfmer was copolymerized with acrylamide without any adscititious surfactant . In addition, hydrophobic monomer was induced into hydrogel by copolymerizing acrylic acid (AAc) and stearyl acrylate in ethanol . To some extent, the mechanical properties were improved.…”

Section: Introductionmentioning

confidence: 99%

A facile method to fabricate tough hydrogel with ultra‐wide adjustable stiffness, stress, and fast recoverability

Xiang

Dong

et al. 2018

J Polym Sci B Polym Phys

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In this article, we report a synergistic strategy to develop dual physically cross‐linked tough hydrogels via one‐pot bulk copolymerization of N‐vinyl‐2‐pyrrolidone, acrylic acid, and stearyl methylacrylate (SMA) without any adscititious surfactant. Due to synergic effects of hydrogen bonding and hydrophobic association, the resulted dual physically cross‐linked hydrogels (DP Gel) with ultra‐wide range adjustable Young's modulus (0.08–45.6 MPa), tensile stress (0.7–6.9 MPa), and toughness (3.3–23.1 MJ m−3). Stretching to 300%, DP Gel exhibited fast recoverability that remained ~95% of initial dissipated energy after resting in 60 °C for 3 min. Finally, scanning electron microscopy revealed that the microstructure of hydrogel changed from phase separation structure to micro phase separation as SMA added, which accounted for excellent performance of DP Gel. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 1469–1474

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“…Hydrogels are composed of a large sum of water and three‐dimensional cross‐linked polymer network structure, which are a kind of soft and wet materials . They have been widely applied in areas such as tissue engineering, actuators and sensors, drug controlled delivery, wastewater treatmentand dye absorption because of their good biocompatibility and nontoxicity. However, traditional chemically cross‐linked hydrogels had low self‐healing properties and recoverability, brittle mechanical performance etc., which seriously limited their further applications.…”

Section: Introductionmentioning

confidence: 99%

Tough, High stretched, Self‐healing C‐dots/Hydrophobically Associated Composited Hydrogels and Their Use for a Fluorescence Sensing Platform

Zhang

Chen

et al. 2018

ChemistrySelect

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In this paper, about 3.5 nm spherical carbon nanodots (C-dots) were prepared through simple hydrothermal method, then they were introduced into the hydrophobically associated (HA) hydrogels. A new class of double physically crosslinked hydrogels (HCD hydrogels) were successfully prepared. C-dots act as physical crosslinker in HA physically cross-linked PAM network, and the hydrogen bond interaction between C-dots and PAM chains endows the hydrogel with extraordinarily mechanical, high stretched and self-healing properties. Moreover, introduction of C-dots gives HCD hydrogels excellent fluorescence properties and good photostability. The location of emisionwavelength of HCD hydrogel was independent of excitationwavelength, while the fluorescence intensity depended on excitation-wavelength, and increased linearly with the increased concentration of C-dots. The sensing HCD hydrogel platform based upon ROS of detecting H 2 O 2 was also explored. ROS formed by decomposition of H 2 O 2 induced fluorescence quench of hydrogels. The fluorescence intensity ratio (I 0 /I) of the H 2 O 2 -HCD at 550 nm correlated linearly with the concentration of H 2 O 2 in the range of 0.01-25 mM. Impressively, this fluorescence sensor exhibited high sensitivity, simplicity, costefficiency and broad applicability. Consequently our study demonstrates a general approach to prepare the robust and self-healing hydrogels which have application potential in sensing fields.

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Hydrophobic association mediated physical hydrogels with high strength and healing ability

Cited by 70 publications

References 64 publications

Novel Self‐Healing, Shape‐Memory, Tunable Double‐Layer Actuators Based on Semi‐IPN and Physical Double‐Network Hydrogels

Novel Self‐Healing, Shape‐Memory, Tunable Double‐Layer Actuators Based on Semi‐IPN and Physical Double‐Network Hydrogels

A facile method to fabricate tough hydrogel with ultra‐wide adjustable stiffness, stress, and fast recoverability

Tough, High stretched, Self‐healing C‐dots/Hydrophobically Associated Composited Hydrogels and Their Use for a Fluorescence Sensing Platform

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