Article ID Journal Published Year Pages File Type
1254458 Chinese Chemical Letters 2016 5 Pages PDF
Abstract

In this work, we report a facile method for the preparation of tough and highly stretchable physical hydrogels by dual cross-linking composed of vinyl-hybrid silica nanoparticles (VSNPs) as multivalent covalent cross-linking and hydrogen bonding as physical cross-linking. Poly(acrylic acid) nanocomposite physical hydrogels (NCP gels) are obtained without adding any organic chemical cross-linkers. When the content of VSNPs is 0.7 wt% (relative to the monomer), the NCP gels exhibit good mechanical properties (fracture strength = 370 kPa, elongation at break = 2200%) and a high swelling capacity in both deionized water (2300 g/g) and saline (220 g/g). Meanwhile, the NCP gels have good recovery ability.

Graphical abstractPoly(acrylic acid) nanocomposite physical hydrogels, with excellent mechanical properties and a high swelling capacity, were prepared by in situ polymerization.Figure optionsDownload full-size imageDownload as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemistry Chemistry (General)
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