Hybrid double‐network hydrogel based on poly(aspartic acid) and poly(acryl amide) with improved mechanical properties

ABSTRACT Hydrogels usually have a smaller mechanical strength and toughness than generic polymeric materials. Therefore, many studies report improvements for mechanical properties of hydrogels by preparing double‐network hydrogels, nanocomposite hydrogels, and nanostructured hydrogels. In this study...

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Bibliographic Details
Published in:Journal of applied polymer science 2018-03, Vol.135 (9), p.n/a
Main Authors: Lee, Jae Sang, Park, Ho Seok, Kim, Young Jun, Kim, Ji‐Heung
Format: Article
Language:English
Subjects:
Acrylamide
Aspartic acid
Bonding strength
Chemical bonds
Crosslinking
Crosslinking polymerization
Free radical polymerization
Gels
Hydrogels
hydrophilic polymers
Ions
Materials science
Mechanical properties
Nanocomposites
Polymers
swelling
synthesis and processing techniques
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Summary:ABSTRACT Hydrogels usually have a smaller mechanical strength and toughness than generic polymeric materials. Therefore, many studies report improvements for mechanical properties of hydrogels by preparing double‐network hydrogels, nanocomposite hydrogels, and nanostructured hydrogels. In this study, interpenetrating‐type dually‐crosslinked hydrogels were prepared via free radical crosslinking polymerization of acrylamide monomers in the presence of poly(aspartic acid) and subsequent immersion in a metal ion containing aqueous solution to induce extra physical crosslinking through ionic or coordination bonding. Using this approach, the mechanical properties of inherently weak and brittle homopolymer gels could be improved via interpenetrating the double network formed by both covalent bonding and metal coordination‐assisted reversible physical crosslinks. The preparation, swelling behavior, morphology, and mechanical properties of these hydrogels are presented. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45925.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.45925