摘要
目的:研究正硅酸乙酯(TEOS)水解、缩聚过程中水与TEOS的摩尔比对硼酸铝晶须(AlBw)与SiO2熔附体填料复合树脂弯曲性能的影响。方法:采用TEOS溶胶-凝胶法,通过控制水与TEOS的摩尔比,制得不同粒径大小及分布的纳米SiO2,高温烧结使其熔附于AlBw表面,制作试样并测试其弯曲强度和弯曲弹性模量;利用透射电镜(TEM)观察AlBw-SiO2熔附体形貌。结果:水与TEOS摩尔比对牙科复合树脂的弯曲强度有显著性影响,但对弯曲弹性模量无显著性影响。SiO2纳米粒子的粒径大小及分散程度将影响牙科复合树脂的弯曲性能;不同粒径大小的纳米粒子不会影响牙科复合树脂的弯曲弹性模量。M水/TEOS=22时复合树脂的弯曲强度达149.59±12.86Mpa。结论:水与TEOS摩尔比可改善AlBw-SiO2熔附体填料复合树脂的弯曲性能。
Objective：To discuss the influence of the mole ratio of water to tetraethyl orthosioate（TEOS） which was on the hydrolysis and polycondensation process of TEOS on the aluminum borate whisker and silica filler composite resins of flexural properties.Methods：The nanometer-size SiO2 particles with different particle size and partical-size distribution were prepared by sol-gel method based on TEOS.SiO2 were fused and attached onto the surface of AlBw through high temperature,then polymerized with resin matrix after surface siliconization and their flexural strength and Young＇s modulus were determined.The shapes of the mixture at various mole ratio were characterized by TEM.Results：The flexural strength of AlBw-SiO2 compound reinforced dental composite resins was significantly improved through change the mole ratio of water to TEOS.But there was no significant difference on Young＇s modulus.SiO2 particle size and dispersion influence the flexural properties of dental composite resins.But there was no significant influence on Young＇s modulus.The flexural properties of dental composite resins was 149.59±12.86Mpa,when the mole ratio of water to TEOS was 22.Conclusion：The mole ratio of water to TEOS could improve flexural properties of the aluminum borate whisker and silica filler composite resins.
出处
《中华老年口腔医学杂志》
2010年第4期239-242,共4页
Chinese Journal of Geriatric Dentistry
基金
云南省自然科学基金项目(编号:2004C0057M)
