Photoreaction Injection Molding of Biomaterial Microstructures

Won Gun Koh, Michael Pishko

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Reaction injection molding using in situ photoinduced polymer macromer gelation in microfluidic channels was applied to the fabrication of poly(ethylene glycol) (PEG) hydrogel microstructures. These hydrogel microstructures were fabricated using poly(dimethylsiloxane) (PDMS) microchannels as mold inserts alone or in combination with photolithography. These microstructures were formed by flowing a gel precursor solution through the microfluidic network, exposing to light, and finally removing the PDMS mold. Microchannels as narrow as 10 μm wide could be used for molding PEG hydrogels, and the resulting three-dimensional hydrogel microstructures did not delaminate from substrates treated with 3-(trichlorosilyl)propyl methacrylate, a gel adhesion promoter. By exploitation of the laminar flow and poor mixing conditions in a microfluidic channel, single microstructures with heterogeneous chemistries were also created, using peptide-modified structures to promote cell adhesion as a model.

Original languageEnglish
Pages (from-to)10310-10316
Number of pages7
JournalLangmuir
Volume19
Issue number24
DOIs
Publication statusPublished - 2003 Nov 25

Fingerprint

injection molding
Biocompatible Materials
Injection molding
Biomaterials
Hydrogels
Hydrogel
microstructure
Microstructure
Microfluidics
Polyethylene glycols
Polydimethylsiloxane
microchannels
Microchannels
adhesion
Gels
gels
Reaction injection molding
Methacrylates
Cell adhesion
gelation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Koh, Won Gun ; Pishko, Michael. / Photoreaction Injection Molding of Biomaterial Microstructures. In: Langmuir. 2003 ; Vol. 19, No. 24. pp. 10310-10316.
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Photoreaction Injection Molding of Biomaterial Microstructures. / Koh, Won Gun; Pishko, Michael.

In: Langmuir, Vol. 19, No. 24, 25.11.2003, p. 10310-10316.

Research output: Contribution to journalArticle

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