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首页> 外文会议>13th International Symposium on Ceramics in Medicine and the Annual Meeting of the International Society for Ceramics in Medicine 22-26 November 2000 Bologna, Italy >Apatite Formation on Ethylene-Vinyl Alcohol Copolymer Modified with Silane Coupling Agent and Calcium Silicate
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Apatite Formation on Ethylene-Vinyl Alcohol Copolymer Modified with Silane Coupling Agent and Calcium Silicate

机译：硅烷偶联剂和硅酸钙改性的乙烯-乙烯醇共聚物上的磷灰石形成

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摘要

Silanol (si-OH) groups on materials are believed to induce the apatite nucleation in the body environment. In the present study, the apatite-forming ability of ethylene-vinyl alcohol copolymer (EVOH), whose surface was modified to be abunant in Si-OH groups, was investigated in a simulated body fluid (SBF) with ion concentratons nearly equal to those of human blodd plasma. Surface modification of EVOH with Si-OH groups was carried out by reacting isocyanatopropyltriethoxysilane (IPTS) and subsequent hydrolysis of its Si_OC_2H_5 groups by 1M-HCl or saturated Ca(OH)_2 aqueous solution. Apatite was, however, not formed on thus surfacemodified EVOH in SBF even after 7 d. When the IPTS-treated EVOH was treated with silica or calcium silicate solution, the obtained specimen formed the apatite on its surface in SBF within 7 or 2 d, respectively. The present surface-modification of EVOH is effective for obtaining an apatite-polymer fiber composite in SBF, which could give bone substitute having bone-bonding ability as well as mechanical properties analogous to those the natural bone.
机译：据信材料上的硅烷醇（si-OH）基团会在人体环境中诱导磷灰石成核。在本研究中，研究了在离子浓度近似等于离子浓度的模拟体液（SBF）中对表面改性为Si-OH基团丰富的乙烯-乙烯醇共聚物（EVOH）的磷灰石形成能力。人的血浆。通过使异氰酸根合丙基三乙氧基硅烷（IPTS）反应，然后用1M-HCl或饱和的Ca（OH）_2水溶液水解其Si_OC_2H_5基团，对EVOH进行Si-OH基团的表面改性。但是，即使经过7 d，在表面改性的EVOH中也不会形成磷灰石。当用二氧化硅或硅酸钙溶液处理经IPTS处理的EVOH时，所得样品分别在7或2 d内在SBF中的表面形成了磷灰石。 EVOH的当前表面改性对于获得SBF中的磷灰石-聚合物纤维复合材料是有效的，其可以赋予具有骨结合能力以及类似于天然骨的机械性能的骨替代物。

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