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Citation: YANG Hong, FU Shan-Gang. Preparation of a Fibrous Hydroxyapatite(HAP)/Chitosan Composite Powder by Urea Coprecipitation[J]. Chinese Journal of Applied Chemistry, ;2005, 22(1): 87-90. shu

Preparation of a Fibrous Hydroxyapatite(HAP)/Chitosan Composite Powder by Urea Coprecipitation

YANG Hong ^, ,
FU Shan-Gang

1.
College of Life Sciences, He'nan Normal University, Xinxiang 453002

Corresponding author: YANG Hong,
Received Date: 22 February 2004
Available Online: 14 May 2004
Fund Project: 河南省自然科学基金资助项目(0411031900) (0411031900)河南省教育厅自然科学研究计划(2004601074) (2004601074)

The composite powder of fibrous hydroxyapatite(HAP)/amorphous chitosan(CS) was prepared by the homogeneous coprecipitation with urea as the precipitant and characterised by XRD, SEM, IR and chemical composition (n(Ca)/n(P)). The n(Ca)/n(P) and phase structure of the powder were found to be affected by the pH value of the system during coprecipitation with urea. The inorganic phase of the composite powder predominately consisted of hydroxyapatite when its n(Ca)/n(P) was 1.64, the urea concentration was 1.0 mol/L and the pH value of system was 7.2. The inorganic phase of the composite powder in part is consisted of calcium phosphate dibasic(DCPA) when its n(Ca)/n(P) was 1.42, the urea concenration was 0.5 mol/L and the pH value of system was 6.1. Compared with mechanically mixed HAP/CS powders, the composite powders had new wave peaks at 1 654 cm^-1 and 1 560 cm^-1 in the IR spectrum.
- chitosan,
- hydroxyapatite,
- urea coprecipitation
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