The Surface Modification and Characteristics of Useful Expanded PTFE Composites by Photo-Radiation Methods

Abstract:

In this study, We immobilized hydrogel material onto expanded polytetrafluoroethylene (ePTFE) film and used as an functional biomaterial. The material is a film containing titanium oxide onto polymer sheet. The hydrogel film is hydrophilic, bacterial inactivated and bio-compatible. In order to improve the ePTFE film biocompatibility, the cold plasma or γ-ray technology was used with acetic acid as monomer to deposit onto ePTFE film and then (N-isopropylacrylamide) was grafted onto the surface by radiation photo-grafting. The characteristics of the material surface were evaluated with X-ray photoelectron spectroscopy (XPS), FTIR and water contact angle. It was found that the contact angle of water on the untreated ePTFE significantly decrease from125° to 72° after ePTFE film being treated with acetic acid plasma deposition procedure. Due to the hydrophilicity of poly (N-isopropylacrylamide), so the contact angle of water on the ePTFE-g-NIPAAm almost approached to 0°. This thermal sensitive ePTFE hydrogels can be applied to artificial guiding tube and wound dressing material.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 1636-1640
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.1636
• Online since: May 2013
• Authors: Te Hsing Wu, Ko Shao Chen, Lie Hang Shen
• Keywords: Expanded Polytetrafluoroethylene, Plasma Deposition, γ-Ray Technology

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