ISSN:
1662-8985
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Expanded polytetrafluoroethylene (ePTFE) is a bioinert material. It has the superiorproperties of thermal and chemical stabilities, low surface energy and high resistivity, so it wasapplied in many biomedical fields. In order to improve the ePTFE film biocompatibility, the coldplasma technology was used with acetic acid as monomer to deposit onto ePTFE film and then(N-isopropylacrylamide) was grafted onto the surface by photo-grafting. The characteristics of thematerial surface were evaluated with X-ray photoelectron spectroscopy (XPS), FTIR and watercontact angle. It was found that the contact angle of water on the untreated ePTFE significantlydecrease from125° to 72° after ePTFE film being treated with acetic acid plasma depositionprocedure. Due to the hydrophilicity of poly(N-isopropylacrylamide), so the contact angle of wateron the ePTFE-g-NIPAAm almost approached to 0°. And we obtained the thermal-sensitive ePTFEhydrogels
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1427.pdf