In:
Высокомолекулярные соединения С, Akademizdatcenter Nauka, , No. 1 ( 2017), p. 14-20
Abstract:
This article reviews the recently developed tough, self-recovery, and self-healing polyampholyte hydrogels. Polyampholyte hydrogels are synthesized using one-step radical copolymerization of cationic and anionic monomers with equal charges at high monomer concentration. The random copolymerization process makes the ionic monomers randomly distributing along the backbones, resulting in the formation of ionic bonds with a wide strength distribution via inter and intra chain complexation in the polymer network, weak bond and strong bonds. The strong bonds serve as permanent cross-linking, integrating the hydrogels to impart the elastic behavior, while the weak bonds can break upon the loading, dissipating energy to give the toughness, and re-form again after unloading to enable the self-recovery behavior. Accordingly, polyampholyte hydrogels have condensed polymers in water (c.a. 40-50 wt%). They are strongly viscoelastic and have a high toughness (fracture energy of 4000 J/m), a wide range of tuning modulus (0.01 to 8 MPa), 100% self-recovery, and a high self-healing efficiency after cutting.
Type of Medium:
Online Resource
ISSN:
2308-1147
DOI:
10.7868/S2308114717010034
Language:
Russian
Publisher:
Akademizdatcenter Nauka
Publication Date:
2017
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