Growth of Hydroxyapatite on Sulfonated Polybenzimidazole Membranes

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (1): 1.

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Growth of Hydroxyapatite on Sulfonated Polybenzimidazole Membranes

HUANG Xia-Yun¹, SHI Zi-Xing^1*, YIN Jie^1,2

1. School of Chemistry and Chemical Technology,
2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China)

Received:2009-07-03 Online:2010-01-10 Published:2010-01-10
Contact: SHI Zi-Xing. E-mail: zxshi@sjtu.edu.cn
Supported by:
国家自然科学基金(批准号: 50973062)资助.

Abstract

Abstract:

Organic polymer coated with hydroxyapatite(HA) is an attractive material for the development of tissue repairing application. The abilities of hydroxyapatite incubation on poly [2,2′-(p-oxydiphenylene)-5,5′-bibenzimidazole](OPBI) and sulfonated poly[2,2′-(p-oxydiphenylene)-5,5′-bibenzimidazole](SOPBI) membranes were investigated with the combination of alternate soaking process and simulated body fluid(SBF) soaking methods. Hydroxyapatite phase was analyzed by SAED and ATR-FTIR method. Morphology changes of the hydroxyapatite were observed by SEM. The results show that the use of the SOPBI membranes leads to a higher hydroxyapatite formation rate than that of the OPBI membranes. The sulfonic groups of SOPBI membranes not only offer a negative charged surface to attract Ca²⁺ but also help imidazole groups to bind Ca²⁺. In comparison, OPBI membranes without sulfonic groups decrease formation ability of hydroxyapatite because protonation types of imidazole groups in alternate soaking solutions inhibit interaction between imidazole and Ca²⁺ and HPO₄^2-, which can not be improved by the subsequent SBF soaking.

Key words: Hydroxyapatite; Poly [2,2′-(p-oxydiphenylene)-5,5′-bibenzimidazole]; Alternate soaking

TrendMD:

HUANG Xia-Yun, SHI Zi-Xing*, YIN Jie. Growth of Hydroxyapatite on Sulfonated Polybenzimidazole Membranes[J]. Chem. J. Chinese Universities, 2010, 31(1): 1.

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Growth of Hydroxyapatite on Sulfonated Polybenzimidazole Membranes

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