Effect of chemical composition on hydrophobicity and zeta potential of plasma sprayed HA/CaO-P2O5 glass coatings

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Ferraz, MP (Author) Other; Monteiro, FJ (Author) FEUP; Serro, AP (Author) Other; Saramago, B (Author) Other; Gibson, IR (Author) Other; Santos, JD (Author) FEUP

Journal

Title: Biomaterials

Vol. 22 No. 23

Pages: 3105-3112

ISSN: 0142-9612

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 36 Citations

ISI Web of Science

Scopus - 39 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Environmental biotechnology

CORDIS: Technological sciences > Engineering > Biomedical enginnering ; Technological sciences > Engineering > Biomaterial engineering

Other information

Authenticus ID: P-000-SG6

DOI: 10.1016/s0142-9612(01)00059-x

Abstract (EN): Multilayered plasma sprayed coatings on the surface of Ti-6Al-4V alloys have been prepared, which were composed of an underlayer of HA and a surface layer of a CaO-P2O5 glass-HA composite, with 2 or 4 wt% of glass. Contact angle and surface tension variation with time, for both water and a protein solution, were determined by the sessile and pendent drop methods respectively using the ADSA-P software. Wettability studies showed that hydrophobicity of the coatings increase with the glass addition. The work of adhesion of albumin was also altered in a controlled manner by the addition of the CaO-P2O5 glass, being lower on the composite coatings than on HA. Zeta potential (ZP) results showed that composite coatings presented a higher net negative charge than HA coatings and that ZP values were also influenced by the content of the glass. This study demonstrated that the surface properties of those coatings may be modified by the addition of CaO-P2O5 glass. (C) 2001 Published by Elsevier Science Ltd.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8