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Synthesis of highly swellable hydrogels of water‐soluble carboxymethyl chitosan and poly(ethylene glycol) |
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| Authors: | María Amparo Gámiz González Ulrica Edlund Ana Vidaurre José Luís Gómez Ribelles |
| Affiliation: | 1. Centre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, Spain;2. Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden;3. Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER‐BBN), Spain |
| Abstract: | Highly swellable hydrogels were produced by crosslinking of high molecular weight carboxymethylated chitosan (CmCHT) with poly(ethylene glycol) (PEG) oligomers. The hydrogel swelling capacity could be controlled via the crosslinking density and ranged from 900% to 5600%. The hydrogels showed good homogeneity with a high interconnected porosity in the swollen state and with nanodomains rich in CmCHT and others rich in PEG diglycidyl ether. Oscillatory frequency sweep analysis showed a storage modulus of 27 kPa for the hydrogel with the highest crosslinking density, which together with the exhibited enzyme degradability with lysozyme at 59 days indicate that these hydrogels have potential use in delivery systems or soft tissue regeneration. © 2017 Society of Chemical Industry |
| Keywords: | carboxymethyl chitosan poly(ethylene glycol) diglycidyl ether swellable hydrogels thermal analysis rheological properties degradation citotoxicity assay |