Preparation and mechanism of calcium phosphate coatings on chemical modified carbon fibers by biomineralization  

作　　者：黄苏萍 周科朝 李志友 

机构地区：[1]State Key Laboratory of Powder Metallurgy,Central South University

出　　处：《中国有色金属学会会刊：英文版》2008年第1期162-166,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(2006CB600904)supported by the National Basic Research Program of China;Project(07JJ3105)supported by the Natural Science Foundation of Hunan Province,China

摘　　要：In order to prepare HA coatings on the carbon fibers,chemical modification and biomineralization processes were applied.The phase components,morphologies,and possible growth mechanism of calcium phosphate were studied by infrared spectroscopy(IR),X-ray diffractometry(XRD)and scanning electron microscopy(SEM).The results show that calcium phosphate coating on carbon fibers can be obtained by biomineralization.But the phase components and morphologies of calcium phosphate coatings are different due to different modification methods.Plate-like CaHPO4.2H2O(DCPD)crystals grow from one site of the active centre by HNO3 treatment.While on the para-aminobenzoic acid treated fibers,the coating is composed of nano-structural HA crystal homogeneously.This is because the -COOH functional groups of para-aminobenzoic acid graft on fibers,with negative charge and arranged structure,accelerating the HA crystal nucleation and crystallization on the carbon fibers.In order to prepare HA coatings on the carbon fibers, chemical modification and biomineralization processes were applied. The phase components, morphologies, and possible growth mechanism of calcium phosphate were studied by infrared spectrosenpy（IR）, X-ray diffractometry（XRD） and scanning electron microsenpy（SEM）. The results show that calcium phosphate coating on carbon fibers can be obtained by biomineralization. But the phase components and morphologies of calcium phosphate coatings are different due to different modification methods. Plate-like CaHPO4·2H2O （DCPD） crystals grow from one site of the active centre by HNO3 treatment. While on the para-aminobenzoic acid treated fibers, the coating is composed of nano-structural HA crystal homogeneously. This is because the -COOH functional groups of para-aminobenzoic acid graft on fibers, with negative charge and arranged structure, accelerating the HA crystal nucleation and crystallization on the carbon fibers.

关 键 词：磷酸钙 碳纤维 生物矿化 化学制品 

分 类 号：TG174.4[金属学及工艺—金属表面处理]