硅酸盐学报2012，Vol.40Issue(4)：606-612,7.
纳米二氧化硅/磷酸钙复合骨水泥的力学强度和水化过程
Mechanical Properties and Hydration of Nanosized Silica/Calcium Phosphate Composite Bone Cements
摘要
Abstract
Nano SiO2/calcium phosphate cement（nSiO2/CPC） composite bone cements were prepared by adding nSiO2 into calcium phosphate cement（CPC）.The setting times,compressive strengths and exothermal behavior of nSiO2/CPC composite bone cements with the different nSiO2 contents were investigated by the Vicat needle,mechanical testing machine and isothermal conduction calo-rimetry.The phase composition and fracture morphologies of the nSiO2/CPC pastes were examined by X-ray diffraction and scanning electron microscopy.The results indicate that the setting time of nSiO2/CPC composite bone cements containing 5% nSiO2 decreases from 16 min to 10 min and its compressive strength increases from（24 ？ 2） MPa to（33 ？ 4） MPa,but when the nSiO2 content exceeds 5%（in mass）,growth of hydroxyapatite is retarded and the compressive strength of the composite bone cements decreases.In the process of hydration,on the one hand,nSiO2 acts as filler,and adsorbs free water from liquid solution,which results in increasing of the real P/L of CPC,and retarding the hydration of CPC.The diameter and number of the pores in nSiO2/CPC pastes decrease because of the increase of the real solid liquid ratio.On the other hand,the reaction of nSiO2 and Ca（OH）2 produced by hydration of CPC leads to form CSH gel,which improves the interface between nSiO2 filler and CPC matrix.Hence the nSiO2/CPC composite bone cements with short setting time and high compressive strength could be achieved by adding the appropriate nSiO2 amount.关键词
磷酸钙/骨水泥/纳米二氧化硅/抗压强度/水化反应Key words
calcium phosphate cement/nanosized silica/compressive strength/hydration分类
信息技术与安全科学引用本文复制引用
尹苏敏,李延报,兰祥辉,陆春华,许仲梓..纳米二氧化硅/磷酸钙复合骨水泥的力学强度和水化过程[J].硅酸盐学报,2012,40(4):606-612,7.基金项目
江苏省自然科学基金 （）
材料化学工程国家重点实验室开放基金 （）
江苏高校优势学科建设工程资助项目 （）
