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Alkaline poly(ethylene glycol)‐based hydrogels for a potential use as bioactive wound dressings
Author(s) -
Koehler Julia,
Verheyen Leonie,
Hedtrich Sarah,
Brandl Ferdinand P.,
Goepferich Achim M.
Publication year - 2017
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.36177
Subject(s) - self healing hydrogels , ethylene glycol , materials science , methacrylate , swelling , wound dressing , polymer chemistry , wound healing , polymer , chemical engineering , composite material , copolymer , surgery , medicine , engineering
The number of patients with chronic wounds is increasing constantly in today's aging society. However, little work is done so far tackling the associated disadvantageous shift of the wound pH. In our study, we developed two different approaches on pH‐modulating wound dressing materials, namely, bioactive interpenetrating polymer network hydrogels based on poly(ethylene glycol) diacrylate/ N ‐vinylimidazole/alginate (named VI x ) and poly(ethylene glycol) diacrylate/2‐dimethylaminoethyl methacrylate/ N ‐carboxyethylchitosan (named DMAEMA x ). Both formulations showed a good cytocompatibility and wound healing capacity in vitro . The developed dressing materials significantly increased the cell ingrowth in wounded human skin constructs; by 364% and 313% for the VI x and the DMAEMA x hydrogel formulation, respectively. Additionally, VI x hydrogels were found to be suitable scaffolds for superficial cell attachment. Our research on the material properties suggests that ionic interactions and hydrogen bonds are the driving forces for the mechanical and swelling properties of the examined hydrogels. High amounts of positively charged amino groups in DMAEMA x hydrogels caused increased liquid uptake (around 190%), whereas VI x hydrogels showed a 10‐fold higher maximum compressive stress in comparison to hydrogels without ionizable functional groups. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3360–3368, 2017.