无氧化钙聚二甲基硅氧烷（PDMS）-二氧化钛杂化物上的磷灰石形成。

Apatite formation on CaO-free polydimethylsiloxane (PDMS)-TiO2 hybrids.

作者信息

Kamitakahara M, Kawashita M, Miyata N, Kokubo T, Nakamura T

机构信息

Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.

出版信息

J Mater Sci Mater Med. 2003 Dec;14(12):1067-72. doi: 10.1023/b:jmsm.0000004003.41223.36.

DOI:10.1023/b:jmsm.0000004003.41223.36

PMID:15348499

Abstract

Polydimethylsiloxane (PDMS)-TiO(2) hybrids with PDMS (M=550)/tetraethylorthotitanate molar ratios at 0.27, 0.68 and 1.35, i.e. Si/Ti atomic ratios at 2, 5 and 10 (hybrids PD2, PD5 and PD10, respectively) were prepared by a sol-gel method. Hybrid PD2 formed many cracks. Hybrids PD5 and PD10 were subjected to hot-water treatment 80 degrees C for 7 d. Hybrid PD5 produced cracks, whereas hybrid PD10 was crack-free after the hot-water treatment. Hybrid PD10 took a homogeneous amorphous structure before the hot-water treatment, and precipitated anatase particles 10-20 nm in size after the hot-water treatment. Hybrid PD10 did not form apatite on its surface in a simulated body fluid before the hot-water treatment, but formed it after the hot-water treatment. The obtained hybrid showed elastic deformation as large as 200% after the hot-water treatment. This kind of hybrid could be useful as a new type of bone-repairing material.

摘要

通过溶胶 - 凝胶法制备了聚二甲基硅氧烷（PDMS）与钛酸四乙酯摩尔比分别为0.27、0.68和1.35（即硅/钛原子比分别为2、5和10，分别对应杂化材料PD2、PD5和PD10）的聚二甲基硅氧烷（PDMS）-二氧化钛（TiO₂）杂化材料。杂化材料PD2形成了许多裂纹。杂化材料PD5和PD10在80℃下进行了7天的热水处理。杂化材料PD5产生了裂纹，而杂化材料PD10在热水处理后无裂纹。杂化材料PD10在热水处理前呈均匀的非晶结构，热水处理后析出了尺寸为10 - 20nm的锐钛矿颗粒。杂化材料PD10在热水处理前于模拟体液中其表面未形成磷灰石，但热水处理后形成了磷灰石。所得杂化材料在热水处理后显示出高达200%的弹性变形。这种杂化材料可作为一种新型的骨修复材料。