摘要
利用淀粉在低温下的吸水不可逆膨胀和膨胀后的粘接作用,高温烧除淀粉的方法制备多孔β-TCP生物陶瓷。液固比（用水量和PVA溶液体积和/β-TCP粉末和淀粉质量和）控制在1.7-2.5有利于坯体的强度;对β-TCP粉末和烧成后的多孔体进行XRD分析,主晶相为β-TCP,多孔体的衍射峰强度相比粉末有较大幅度的提高,表明晶粒生长良好;SEM分析表明材料呈大孔-微孔分布结构,三维连通,大孔孔径在100-500μm,微孔孔径在3-50μm,有利于组织的长入和材料本身的降解;机械性能测试表明在淀粉添加体积比为5%-20%时,抗压强度在3-7 MPa,气孔率大约在40%-80%。分析表明材料基本符合生物学要求,是良好的骨修复材料。
Porous β-TCP bioceramic was made by calcined amylum in high temperature,which use amylum nature of irreversible expansion after amylum hydrophilic and adhesive action after expansion. Solid-to-liquid ratio was controlled in the range of 1.7-2.5 which is used for the intensity of body ;β-TCP powders and sintered porous body were tested by XRD. After analysis, we can see that porous body＇s CPS are sharper than powders’s. it shows that crystal grain grow very well,the results of SEM indicate that the material take on macropore-micropore structure. Among the pore, there are connectivity in three dimensions, the aperture of macropore is about 100-500μm,and the minipore is about 3-50μm,which are advantage of tissue growing and degradation reaction of material ; mechanical behaviour measure indicates that compression strength is in the rang of 3-TMPa, porousity is about 40 %-80% when amylum addition are in the range of 5 %-20 %. So we can see the material basically meet the requirement biology,it is a well bone recovery material.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第7期1189-1192,1196,共5页
Journal of Functional Materials
基金
国家自然科学研究基金资助项目(50472041)
