Hydroxyapatite deposition by alternating soaking technique on poly(vinyl alcohol)-coated polyethylene films

Abstract

A poly(vinyl alcohol) (PVA)-coating on polyethylene films, prepared by repetitive adsorption/drying in an aqueous PVAsolution, accelerated hydroxyapatite (HAp) deposition by an alternate soaking in aqueous solutions containing Ca²⁺ and PO^¾- ions. X-ray photoelectron spectra of the 4 surface of the HAp-deposited film showed the presence of calcium and phosphorus of a suitable peak ratio for HAp formation. X-ray diffraction analyses also revealed peaks corresponding to HAp. Scanning electron microscopic observation showed the surface of the HAp layer to be smooth, with nano-ordered dotted threads in networks. A simple PVA coating on a surface will serve as a novel system for accelerated HAp formation via alternating soaking.

Keywords:

• HYDROXYAPATITE
• POLY(VINYL ALCOHOL)
• ALTERNATE SOAKING
• ULTRATHIN POLYMER FILM
• ORGANIC-INORGANIC COMPOSITE