Synthesis, permeability and biocompatibility of tricomponent membranes containing polyethylene glycol, polydimethylsiloxane and polypentamethylcyclopentasiloxane domains

P. Kurian, B. Kasibhatla, J. Daum, C. A. Burns, M. Moosa, K. S. Rosenthal, J. P. Kennedy

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

The synthesis of "smart" tricomponent amphiphilic membranes containing poly(ethylene glycol) (PEG), polydimethylsiloxane (PDMS) and polypentamethylcyclopentasiloxane (PD5) domains is described. Contact angle hysteresis indicates that in air, the surfaces of such PEG/PD5/PDMS membranes are enriched by the hydrophobic components, PDMS and PD5, while in water, the surfaces are rich in the hydrophilic PEG. The oxygen permeability of a series of membranes with varying Mc,hydrophilic (Mn,PEG=4600, 10,000 and 20,000g/mol) and varying PEG/PD5/PDMS compositions was studied. Oxygen permeability increased with the amount of PDMS in the membrane. The molecular weight cut-off (MWCO) ranges and permeability coefficients of insulin through a series of PEG/PD5/PDMS(=29/14/57) membranes with varying Mc,hydrophilic were determined. Insulin permeability is directly related to Mc,hydrophilic of the membrane. MWCO studies show that the membranes are semipermeable to, i.e., allow the transport of smaller proteins such as insulin (Mn=5733g/mol, Rs=1.34nm) and cytochrome c (Mn=12,400g/mol, Rs=1.63nm), but are barriers to larger proteins such as albumin (Mn=66,000g/mol, Rs=3.62nm). Implantation of representative membranes in rats showed them to be biocompatible. According to these studies, PEG/PD5/PDMS membranes may be suitable for biological applications, e.g., immunoisolation of cells.

Original languageEnglish (US)
Pages (from-to)3493-3503
Number of pages11
JournalBiomaterials
Volume24
Issue number20
DOIs
StatePublished - Sep 2003
Externally publishedYes

Keywords

  • Biocompatibility
  • Hydrogels
  • Insulin diffusion
  • Membrane
  • Molecular weight cut-off
  • Oxygen diffusion

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

Fingerprint Dive into the research topics of 'Synthesis, permeability and biocompatibility of tricomponent membranes containing polyethylene glycol, polydimethylsiloxane and polypentamethylcyclopentasiloxane domains'. Together they form a unique fingerprint.

  • Cite this