Synthesis and properties of semi-interpenetrating polymer networks composed of β-chitin and poly(ethylene glycol) macromer

Seong Soo Kim, Young Moo Lee, Chong Soo Cho

Research output: Contribution to journalArticle

93 Scopus citations

Abstract

Semi-interpenetrating polymer network (semi-IPN) hydrogel membranes composed of β-chitin and poly(ethylene glycol) (PEG) diacrylate macromer were synthesized and characterized for future biomedical application. PEG macromer/β-chitin dissolved in formic acid was cast to prepare films, followed by subsequent crosslinking with 2,2-dimethoxy-2-phenylacetophenone by u.v. irradiation. Photocrosslinked hydrogels exhibited relatively high equilibrium water content in the range of 60-81%. The crystallinity, thermal properties and mechanical properties of semi-IPN hydrogel membranes were studied. All the crosslinked membranes revealed a remarkable decrease in crystallinity. Their glass transition temperatures increased with increasing β-chitin content. The tensile strengths of semi-IPNs in the swollen state range between 1.35 and 2.41 MPa; these are the highest values reported to date for crosslinked hydrogels.

Original languageEnglish
Pages (from-to)4497-4501
Number of pages5
JournalPolymer
Volume36
Issue number23
DOIs
StatePublished - 1995 Jan 1

Keywords

  • hydrogel
  • semi-IPN
  • β-chitin/PEG macromer

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