纳米SiO_2对poss复合树脂弯曲和抗压强度的影响

Impact of Nano-silica Upon Flexural Strength and Compessive Strength of Poss Composite Resin

目的:观察纳米SiO2填料对纳米复合树脂poss的弯曲强度和抗压强度的影响,探究纳米SiO2的最佳添加比。方法:将经过硅烷偶联化的纳米SiO2颗粒加入poss复合树脂中,合成SiO2质量分数分别为0.5%,1%,1.5%和2%的SiO2/poss复合树脂,分别为BCDE四组,纯poss组为A组(对照组)。每组试件固定于万能材料测试机上,以1.0mm/min的速度垂直加压直至试样破坏,采用SPSS16.0软件对结果做单因素方差分析。结果:弯曲强度测试结果:C组最高,与其他四组均有统计学差异(P<0.05);A、B、D三组无显著性差异,与E组差异明显(P<0.05)。抗压强度测试结果:D组最高,与其他四组均有统计学差异(P<0.05);B组和E组与A组差异显著(P<0.05),与C组无显著差异。结论:纳米SiO2在一定范围内能够提高poss复合树脂的弯曲强度和抗压强度。

Objective： To observe the effects of nano-silica upon flexural strength and compressive strength of poss composite resin. Methods： After measured 0.5wt%, 1.0wt%, 1.5wt%, 2.0wt% by the electronic balance, nano SiO2 particles were added into poss composite resin respectively. Flexural strength and compressive strength of each material were determined by Zwick/Z010 universal testing machine, which were pressed by 1 mm / min until fracture occurred. The data were analyzed by ANOVA with the use of SPSS 16. 0 software. Results： The data of flexural strength revealed that Group C exhibited higher flexural strength than the other four groups. There was no statistical difference among Group A, B and D, but important diferences could be seen between Group E and any of the above three groups. Result of compressive strength testing： The compressive strength of Group D is the highest. There was statistical difference between Group A and Group B, the same difference could be seen between group A and Group E. There was no significant difference among Group B, C and E. Conclusion： Approriate proportion of nano-silica could enhance the flexural strength and compressive strength ofposs composite resin.