Crosslinking dynamics and gelation characteristics of photo- and thermally polymerized poly(ethylene glycol) hydrogels

Jungmoon Sung, Dong Geun Lee, Sukchin Lee, Junyoung Park, Hyun Wook Jung

Research output: Contribution to journalArticlepeer-review

Abstract

The crosslinking behaviors and gelation features of poly(ethylene glycol) (PEG) hydrogels were scrutinized during the UV and thermal polymerizations of mixtures of poly(ethylene glycol) methacrylate (PEGMA, monomer) and poly(ethylene glycol) dimethacrylates (PEGDMAs, crosslinkers). The real-time crosslinking behavior of the PEG hydrogels was quantified as a function of the UV irradiation time and reaction temperature during the UV and thermal polymerization, respectively, using real-time FT-IR spectrometry and rotational rheometry. The gelation characteristics of UV- and thermally crosslinked hydrogels were compared through the analysis of the gel fraction, swelling ratio, surface hardness, and the loading and release of rhodamine-B. The gelation properties of the cured hydrogel films were suitably correlated with the real-time rheological properties and crosslinked network state of the PEG mixtures. The crosslinking and gelation properties of the cured hydrogels could be optimally tuned by not only the molecular weight of the crosslinker but also the UV or thermal polymerization conditions.

Original languageEnglish
Article number3277
JournalMaterials
Volume13
Issue number15
DOIs
Publication statusPublished - 2020

Keywords

  • Gelation properties
  • PEG hydrogel
  • Real-time FT-IR
  • Rheological properties
  • UV and thermal crosslinking

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Crosslinking dynamics and gelation characteristics of photo- and thermally polymerized poly(ethylene glycol) hydrogels'. Together they form a unique fingerprint.

Cite this