Preparation of hydroxyapatite/poly(vinyl alcohol) composite film with uniformly dispersed hydroxyapatite particles using citric acid

Autor:	Yong S. Chung, Oh Wook Kwon, Sung S. Han, Sung I. Kang, Won Seok Lyoo, Se G. Lee, Yong R. Lee, Seok Kyun Noh, Byung G. Min
Rok vydání:	2007
Předmět:	Vinyl alcohol Materials science Polymers and Plastics Coprecipitation Composite number Dispersity General Chemistry Phosphate Casting Surfaces Coatings and Films Solvent chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry Citric acid Nuclear chemistry
Zdroj:	Journal of Applied Polymer Science. 104:3240-3244
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.25949
Popis:	Biocompatible hydroxyapatite (HA)/poly(vinyl alcohol) (PVA) composites and their transparent films were prepared by the coprecipitation and solvent casting method. The formation of HA in PVA composite powder was confirmed by the characteristic phosphate bands at 1100–1032 and 565 cm−1 at FT-IR spectra, and the weight ratio of HA to PVA was 50/50 examined by TGA. The crystal melting temperature of HA/PVA decreased compared with that of pure PVA. HA/PVA (50/50) composite powder and pure PVA were dissolved in dimethyl sulfoxide to obtain a film with HA/PVA weight ratio of 10/90. To improve HA particles' dispersity, which is one of the major factors affecting the mechanical properties of composite materials, various contents of citric acid were used for the preparation of HA/PVA films. At a citric acid concentration of 5 wt %, HA/PVA film with good dispersity of HA particles was obtained. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
Databáze:	OpenAIRE
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