Study of mixed Ca-Zn hydroxyapatite surface modified by lactic acid

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• 作者：Thouraya Turki^a ; Abdallah Aissa^a ; Christophe Goze Bac^b ; Fé ; rid Rachdi^b ; ^{Ferid.Rachdi@univ-montp2.fr} ; Mongi Debbabi^a
• 关键词：Hydroxyapatite ; Lactic acid ; Grafting ; Hybrid compounds
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：1 July, 2012
• 卷：258
• 期：18
• 页码：6759-6764
• 文件大小：789 K

摘要

The new hybrid inorganic-organic composites, Ca_(10鈭?em>x)Zn_x(PO₄)₆(OH)₂-lactic acid, at different amounts of zinc and lactic acid were prepared by dissolution of the organic compound in an hydroxyapatite suspension. They were characterized by XRD, IR, MAS NMR (¹³C and ¹H) and chemical analysis. The crystallinity was slightly affected by the presence of organic fragments. IR and (¹³C and ¹H) MAS NMR measurements indicate that the carboxylic groups of the acid interact with calcium and zinc ions of hydroxyapatite surface. Chemical analysis displays that zinc promotes the acid grafting. A mechanism of surface modification is proposed based on the obtained results.