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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 effect of nano-SiO2 filler on flexural strength and compressive strength of nanocomposite resin poss, and to explore the best addition ratio of nano-SiO2. Methods: The silane coupling nano-SiO2 particles were added into poss composite resin to synthesize SiO2 / poss composite resin with SiO2 mass fraction of 0.5%, 1%, 1.5% and 2%, respectively, four groups of BCDE, pure poss Group A (control group). Each specimen was fixed on a universal testing machine and pressed vertically at a speed of 1.0 mm / min until the specimen was destroyed. One-way analysis of variance was performed by SPSS16.0 software. Results: The results of flexural strength test showed that there was a significant difference between group C and group C (P <0.05). There was no significant difference between groups A, B and D (P <0.05). Compressive strength test results: the highest in D group, and the other four groups were statistically significant (P <0.05); B group and E group and A group significant difference (P <0.05), and C group no significant difference. Conclusion: The nano-SiO2 can increase the bending strength and compressive strength of poss composite resin within a certain range.