|Table of Contents|

Preparation and characterization of hydroxyapatite-chitosan composite coatings using a spin-coating technique(PDF)

《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

Issue:
2017年No.5(441-550)
Page:
451-456
Research Field:
化学与化工
Publishing date:

Info

Title:
Preparation and characterization of hydroxyapatite-chitosan composite coatings using a spin-coating technique
Author(s):
Yuan Qiuhua Zhang Ziqiang Xu Anping Wu Jianbo Qin Caoping Chen Zehui Lin Songxin and Zhang Peixin
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China
Keywords:
biomaterials science hydroxyapatite chitosan composite coatings spin-coating technique mechanical property
PACS:
R 318.08
DOI:
10.3724/SP.J.1249.2017.05451
Abstract:
Based on a chemical precipitation method, the hydroxyapatite powders were prepared using Na2HPO4 and Ca(NO3)2·4H2O as raw materials. The powders were dispersed into chitosan-acetic acid solution with the aid of continuous ultrasonic agitation to prepare hydroxyapatite-chitosan (HA-CS) suspension via solution blending and magnetic stirring. Hydroxyapatite-chitosan composite coatings were fabricated on 304-type stainless steel substrates by a spin-coating technique, then dried at 25 ℃ and 37 ℃ for 12 h, respectively. The two synthesized samples were characterized and tested by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and electronic tensile machine. The results indicate the tensile strength of HA-CS composites reaches up to (69.04±1.21) MPa, and the coatings display good crystallinity, good adhesion, high purity and little decomposition. In addition, by means of spin-coating technique, HA could be evenly dispersed in CS and there are no aggregated or free HA particles in the coatings. The HA-CS composite coatings show better performance when drying at 37 ℃ than at 25 ℃, which is more conducive to combine interaction between HA and CS.

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Last Update: 2017-09-11