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无机材料学报

无机材料学报

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乌贼骨及其水热改性制备羟基磷灰石的研究

刘金华, 王大志   

  1. 中国科学技术大学材料科学与工程系, 合肥 230026
  • 收稿日期:2005-01-26 修回日期:2005-04-11 出版日期:2006-03-20 网络出版日期:2006-03-20

Cuttlebone and Its Hydrothermal Converting to Hydroxyapatite

LIU Jin-Hua, WANG Da-Zhi   

  1. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026 China
  • Received:2005-01-26 Revised:2005-04-11 Published:2006-03-20 Online:2006-03-20

PDF (PC)

2076

被引次数

15

摘要： 用X射线衍射(XRD)、傅立叶变换红外光谱(FTIR)、热重-差热(TG-DTA)、扫面电子显微镜(SEM)等分析方法对水热改性前及改性不同阶段乌贼骨的矿物组成、表面形貌等进行了表征、分析, 并对水热反应机理进行了研究. 结果显示, 原始乌贼骨主要由棒状文石层堆砌而成, 外观呈多孔的房架式结构. 在磷酸盐溶液中水热处理后, 内部的文石经由固态局部规整离子交换反应(Solid-state topotactic ion exchange reaction)转变为羟基磷灰石, 原来文石结晶体的形貌及规则排列方式没有改变; 而外表面文石则通过溶解-重结晶(Dissolution-recrystallization)过程转变为鳞片
状的羟基磷灰石, 随着水热处理时间的延长, 鳞片状羟基磷灰石进一步自组装成5μm左右的规则圆球, 本文对自组装的机理也做了初步探讨.

关键词: 乌贼骨, 羟基磷灰石, 水热反应, 反应机理

Abstract: The composition and morphology
of original cuttlebone and hydroxyapatite(HAP)-converted cuttlebone were
characterized by means of X-ray diffraction (XRD), Fourier transmission
infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis(TG-DTA) and scanning electron microscopy (SEM). The mechanism of self-assembly was also discussed. The results show that the mineral of original cuttlebone is rod-like aragonite polymorph of CaCO3 and the chamber-like macroporous architecture is its extrinsic feature. In phosphate solution, the interior aragonite
converts hydrothermally to HAP by a solid-state topotactic ion-exchange reaction in which the HAP retains the morphology and the orientation of the original aragonite. Meanwhile, the exterior aragonite converts hydrothermally to HAP via dissolution-recrystallization, with squama-like morphology. These squama-like HAP self-assemble to microspheres with hydrothermal reaction time prolonged.

Key words: cuttlebone, hydroxyapatite, hydrothermal conversion, reaction mechanism

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