Radiation-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes

Norsyahidah Mohd Hidzir, David J T Hill, Darren Martin, Lisbeth Grondahl

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Expanded poly(tetrafluoroethylene) (ePTFE) is currently being applied in facial reconstruction surgery. One requirement for the use of ePTFE membranes in soft tissue replacements is establishment of a well-bonded interface with the surrounding bone. However, ePTFE is classified as bioinert, thus lacking in biomimetic properties which may result in poor osseointegration at the bone-implant interface. Thus, the introduction of functional groups onto the polymer surface was carried out in the current study using radiation induced grafting of acrylic acid (AA) yielding graft yields of up to 40%. This resulted in reducing the hydrophobicity (advancing contact angle reduced from 116 to 92°). XPS revealed that the grafted PAA was highly crosslinked. The effects of grafting conditions (dose, monomer concentration, as well as solvent) on the grafting outcome were evaluated. Grafting of tertbutyl acrylate (tBA) was investigated but low graft yields were obtained and this was shown to be unaffected by the solvent used during the grafting process. The mechanical properties of the AA grafted membranes were altered significantly and were dependent on the testing conditions (wet or dry).

Original languageEnglish
Pages (from-to)6063-6071
Number of pages9
JournalPolymer (United Kingdom)
Volume53
Issue number26
DOIs
Publication statusPublished - 7 Dec 2012
Externally publishedYes

Fingerprint

Polytetrafluoroethylenes
Acrylics
Membranes
Radiation
Acids
Grafts
Bone
Biomimetics
Hydrophobicity
Surgery
Functional groups
Contact angle
Polymers
X ray photoelectron spectroscopy
Monomers
acrylic acid
Tissue
Mechanical properties
Testing

Keywords

  • Gamma-irradiation
  • Surface modification
  • Tensile test

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Radiation-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes. / Mohd Hidzir, Norsyahidah; Hill, David J T; Martin, Darren; Grondahl, Lisbeth.

In: Polymer (United Kingdom), Vol. 53, No. 26, 07.12.2012, p. 6063-6071.

Research output: Contribution to journalArticle

Mohd Hidzir, Norsyahidah ; Hill, David J T ; Martin, Darren ; Grondahl, Lisbeth. / Radiation-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes. In: Polymer (United Kingdom). 2012 ; Vol. 53, No. 26. pp. 6063-6071.
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