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

ABSTRACT 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 bondi...

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Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 2018-11, Vol.56 (21), p.1469-1474
Main Authors: Xiang, Shuangfei, Li, Ting, Dong, Weifu, Lu, Qinghua
Format: Article
Language:English
Subjects:
Acrylic acid
Copolymerization
Hydrogels
Hydrogen bonding
hydrogen bonds
hydrophobic association
mechanical properties
Modulus of elasticity
Phase separation
Phase transitions
Recoverability
Scanning electron microscopy
Stiffness
Tensile stress
tough hydrogels
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Summary:ABSTRACT 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 A facile method to fabricate dual physically cross‐linked hydrogels with ultra‐wide range adjustable Young's modulus (0.08–45.6 MPa), tensile stress (0.7–6.9 MPa), toughness (3.3–23.1 MJ·m−3), and fast recoverability is presented. The hydrogel was developed via a one‐pot bulk copolymerization of N‐vinyl‐2‐pyrrolidone (NVP), acrylic acid (AAc), and stearyl methylacrylate (SMA) without any added surfactant.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.24737