Processing tough supramolecular hydrogels with tunable strength of polyion complex

Zhu, Fang; Xiang, Lin; Wu, Zi Liang; Cheng, Libo; Yin, Jun; Song, Yihu; Qian, Jin; Zheng, Qiang

doi:10.1016/j.polymer.2016.04.043

Cited by 45 publications

(44 citation statements)

References 54 publications

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“…8, where observations on the gel with 0.1 M of DGI are depicted (cyclic test with strain rate˙ = 0.005 s −1 and maximum elongation ratio k max = 4) together with results of simulation. Analogous stress-strain curves were reported on poly(N, Ndimethylacrylamide-co-methacrylic acid) gel [69], AAm-agar gels with relatively high concentrations of agar in pre-gel solutions [70], and poly (3-(methacryloylamino)propyl-trimethylammonium chloride-co-sodium p-styrenesulfonate) gel [71,72]. In accord with [69], the model describes these phenomena as a competition between non-dissipative plastic flow under stretching (characterized by parameter a) and the non-Gaussian response of polymer chains (determined by the constant K).…”

Section: Cyclic Tests With Various Maximum Elongation Ratiossupporting

confidence: 62%

Mechanical response of double-network gels with dynamic bonds under multi-cycle deformation

Drozdov

Christiansen

2018

Polymer

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Mechanical behavior of double-network (DN) gels with covalent and non-covalent bonds under multi-cycle loading depends strongly on time, strain rate and deformation program. A model is developed for the viscoelastic and viscoplastic responses of a polymer network with permanent and temporary junctions. Viscoelasticity is modeled as breakage and reformation of temporary bonds driven by thermal fluctuations. Viscoplasticity is treated as sliding of permanent junctions with respect to their initial positions in the network. Slippage occurs when a junction becomes unbalanced due to transition of a chain linked by this junction from its active state into the dangling state. Analysis of observations in tensile tests with various strain rates, relaxation tests, loading-unloading tests, and multi-cycle tests with various deformation programs on a series of DN gels shows that the experimental stress-strain diagrams are described correctly by the governing equations, material parameters evolve consistently with experimental conditions, and predictions of the model are in quantitative (where sufficient data are provided) and qualitative agreement with experimental data. In particular, numerical simulation demonstrates the ability of the model to describe the Mullins effect in DN gels.

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Section: Cyclic Tests With Various Maximum Elongation Ratiossupporting

confidence: 62%

Mechanical response of double-network gels with dynamic bonds under multi-cycle deformation

Drozdov

Christiansen

2018

Polymer

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“…The HGSM was homogeneously dispersed in the GelMA hydrogel network, forming dynamic supramolecular crosslinking points during random copolymerization, which resulted in a relatively high crosslinking density in the polymer network. Compared to previous studies on supramolecular hydrogels, 63 we developed extraordinarily tough HGGelMA hydrogels with a network comprising of both strong and weaker crosslinks. The internal fracturing of the host-guest crosslinks effectively dissipated energy and prevented catastrophic break propagation during loading.…”

Section: Self-healing Abilitymentioning

confidence: 99%

3D-printable self-healing and mechanically reinforced hydrogels with host–guest non-covalent interactions integrated into covalently linked networks

et al. 2019

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“…[ 14–16 ] Among them, the polyion complex (PIC) hydrogel is formed by the combination of two kinds of polymer chains with opposite charges through electrostatic interaction. Researchers have developed various PIC hydrogels with the specific properties, such as high strength, [ 17 ] controllable mechanical properties, [ 18,19 ] modulated self‐healing, [ 18,20 ] and stimuli‐responsiveness. [ 21 ] And, it has applications in many fields, including food packaging, [ 22 ] controlled drug release, [ 21,23 ] and high property films.…”

Section: Introductionmentioning

confidence: 99%

pH Responsive Strong Polyion Complex Shape Memory Hydrogel with Spontaneous Shape Changing and Information Encryption

Zhang

Wang

et al. 2021

Macromol. Rapid Commun.

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Polyion complex (PIC) hydrogels attract lots of studies because of the relatively definite network and excellent mechanical strength. However, the stability of the PIC hydrogel is poor in salt solutions due to the counter‐ion screening effect, which restricts their applications. Besides, novel functions of the PIC hydrogels also need to be explored. In this work, a multifunctional PIC hydrogel is prepared by polymerizing a hydrophobic monomer 2‐(diethylamino)ethyl methacrylate in poly(styrene sulfonic acid) aqueous solution with the presence of counter‐ion NaCl. Fourier transform infrared (FTIR) spectra, water content, and mechanical properties of the hydrogel are investigated. The introduction of hydrophobic weak electrolyte into the hydrogel brings stable excellent mechanical strength even in NaCl solutions with high concentration and pH modulated softening and strengthening. Surprisingly, the hydrogel swells but is strengthened in HCl, while it shrinks but is softened in NaOH. pH induced shape memory and unique spontaneous shape changing is thus presented benefiting from this synergistic effect. Moreover, information encryption is realized on the PIC hydrogel owing to the transmittance change and the different water absorption capability of the hydrogel at different states. This new kind of PIC hydrogel proposes a new smart material in continuously actuating soft machines and secretive information transformation.

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Processing tough supramolecular hydrogels with tunable strength of polyion complex

Cited by 45 publications

References 54 publications

Mechanical response of double-network gels with dynamic bonds under multi-cycle deformation

Mechanical response of double-network gels with dynamic bonds under multi-cycle deformation

3D-printable self-healing and mechanically reinforced hydrogels with host–guest non-covalent interactions integrated into covalently linked networks

pH Responsive Strong Polyion Complex Shape Memory Hydrogel with Spontaneous Shape Changing and Information Encryption

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