Self‐Healing Hydrogel of Poly (vinyl alcohol)/Agarose with Robust Mechanical Property

Shao, Jia; Zhang, Zheng; Zhao, Shixing; Wang, Sui; Guo, Zhiyong; Xie, Hongzhen; Hu, Yufang

doi:10.1002/star.201800281

Cited by 23 publications

(12 citation statements)

References 57 publications

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“…A,B) Plots of the compressive versus tensile strength and modulus for BC–PVA–PAMPS (this work) and other strong hydrogels (see Table S1 in the Supporting Information for data and references). [ 13–35 ] The multiple data points for BC–PVA–PAMPS are for different compositions. C) BC–PVA–PAMPS easily bears the weight of a 100 lb.…”

Section: Introductionmentioning

confidence: 99%

A Synthetic Hydrogel Composite with the Mechanical Behavior and Durability of Cartilage

Yang

Zhao

Koshut

et al. 2020

Adv Funct Materials

191

178

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This article reports the first hydrogel with the strength and modulus of cartilage in both tension and compression, and the first to exhibit cartilage‐equivalent tensile fatigue strength at 100 000 cycles. These properties are achieved by infiltrating a bacterial cellulose (BC) nanofiber network with a poly(vinyl alcohol) (PVA)–poly(2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid sodium salt) (PAMPS) double network hydrogel. The BC provides tensile strength in a manner analogous to collagen in cartilage, while the PAMPS provides a fixed negative charge and osmotic restoring force similar to the role of aggrecan in cartilage. The hydrogel has the same aggregate modulus and permeability as cartilage, resulting in the same time‐dependent deformation under confined compression. The hydrogel is not cytotoxic, has a coefficient of friction 45% lower than cartilage, and is 4.4 times more wear‐resistant than a PVA hydrogel. The properties of this hydrogel make it an excellent candidate material for replacement of damaged cartilage.

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Section: Introductionmentioning

confidence: 99%

A Synthetic Hydrogel Composite with the Mechanical Behavior and Durability of Cartilage

Yang

Zhao

Koshut

et al. 2020

Adv Funct Materials

191

178

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“…The PLA layers (integrated into the FE numerical simulation models) were supposed to develop linear elasticity. The stress–strain engineering and elastic modulus relationship, which is dependent on the experimental test samples and the Poisson ratio = 0.36, was used [ 35 , 36 , 37 , 38 , 39 ]. Tensile sample dimensions, various structures, and opening shapes were prepared according to a standardized sample PLA sheet [ 30 ], as represented in Figure 2 .…”

Section: Experimental Workmentioning

confidence: 99%

Evaluation of the Infill Design on the Tensile Response of 3D Printed Polylactic Acid Polymer

et al. 2021

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The current study explores the effects of geometrical shapes of the infills on the 3D printed polylactic acid (PLA) plastic on the tensile properties. For this purpose, by utilizing an accessible supply desktop printer, specimens of diamond, rectangular, and hexagonal infill patterns were produced using the fused filament fabrication (FFF) 3D printing technique. Additionally, solid samples were printed for comparison. The printed tensile test specimens were conducted at environmental temperature, Ta of 23 °C and crosshead speed, VC.H of 5 mm/min. Mainly, this study focuses on investigating the percentage infill with respect to the cross-sectional area of the investigated samples. The mechanical properties, i.e., modulus of toughness, ultimate tensile stress, yield stress, and percent elongation, were explored for each sample having a different geometrical infill design. The test outcomes for each pattern were systematically compared. To further validate the experimental results, a computer simulation using finite element analysis was also performed and contrasted with the experimental tensile tests. The experimental results mainly suggested a brittle behavior for solidly infilled specimen, while rectangular, diamond, and hexagonal infill patterns showed ductile-like behavior (fine size and texture of infills). This brittleness may be due to the relatively higher infill density results that led to the high bonding adhesion of the printed layers, and the size and thickness effects of the solid substrate. It made the solidly infilled specimen structure denser and brittle. Among all structures, hexagon geometrical infill showed relative improvement in the mechanical properties (highest ultimate tensile stress and modulus values 1759.4 MPa and 57.74 MPa, respectively) compared with other geometrical infills. Therefore, the geometrical infill effects play an important role in selecting the suitable mechanical property’s values in industrial applications.

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“…Three dimensional network heterogeneity and lack of an effective energy dissipation mechanism are the main reasons for poor mechanical properties of hydrogels. [15][16][17][18] Recently, various strategies have been developed and utilized for preparing the high-strength PVA hydrogels, including nanocomposite hydrogels, 19,20 multi-network hydrogels, 21,22 and interpenetrating network hydrogels. 15,[23][24][25] Besides these strategies, mechanical properties of PVA-based hydrogels could also be improved by the freeze-thaw process.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of transparent poly (γ‐glutamic acid) modified poly (vinyl alcohol) hydrogels with high tensile strength and toughness

Chen

Kim

et al. 2022

J of Applied Polymer Sci

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In the present work, a transparent poly (γ‐glutamic acid) modified polyvinyl alcohol (γ‐PGA/PVA) hydrogel with excellent tensile strength and toughness was prepared by a simple and effective immersion method. Results revealed that γ‐PGA concentration and immersion time have great influence on the mechanical properties of prepared γ‐PGA/PVA hydrogels. The mechanical tensile strength of γ‐PGA/PVA hydrogel reached to 16.68 ± 0.43 MPa with the strain of 511.64% ± 23.38% when prepared PVA hydrogel was immersed in 20% γ‐PGA solution for 24 h (denoted as 20% γ‐PGA/PVA). Meanwhile, 20% γ‐PGA/PVA hydrogel exhibited excellent mechanical properties, such as high‐level torsion, knotting and puncture resistant, and can lift a 5 kg weight without obvious rupture. The morphology, structure, compositions and mechanism of enhanced mechanical properties were investigated. Besides the excellent mechanical properties, 20% γ‐PGA/PVA hydrogel possessed good conductivity as well as high sensitivity to external strain. Furthermore, in vitro good cytocompatibility of 20% γ‐PGA/PVA hydrogels was demonstrated by using MC3T3‐E1 cells. Therefore, the prepared 20% γ‐PGA/PVA hydrogel may provide the possibility for the applications in the field of cartilage repair/regeneration, artificial skin and human motion sensor.

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Self‐Healing Hydrogel of Poly (vinyl alcohol)/Agarose with Robust Mechanical Property

Cited by 23 publications

References 57 publications

A Synthetic Hydrogel Composite with the Mechanical Behavior and Durability of Cartilage

A Synthetic Hydrogel Composite with the Mechanical Behavior and Durability of Cartilage

Evaluation of the Infill Design on the Tensile Response of 3D Printed Polylactic Acid Polymer

Facile preparation of transparent poly (γ‐glutamic acid) modified poly (vinyl alcohol) hydrogels with high tensile strength and toughness

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