纳米氧化锆对PMMA挠曲强度和表面硬度的影响  

Effect of nano ZrO_2 on flexural strength and surface hardness of polymethylmethacrylate

作　　者：张昕景[1] 张修银[1] 朱帮尚[2] 张璐[1] 钱晨[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院.口腔医学院口腔修复科上海市口腔医学重点实验室,上海200011 [2]上海交通大学分析测试中心,上海200030

出　　处：《上海口腔医学》2011年第4期358-363,共6页Shanghai Journal of Stomatology

基　　金：上海市科学技术委员会资助项目(065CJ14048;09CJ1408900)

摘　　要：目的:研究纳米ZrO2的添加量对聚甲基丙烯酸甲酯(PMMA)基托树脂机械性能的影响。方法:使用质量分数为1.5%的硅烷偶联剂Z-6030对纳米ZrO2颗粒进行表面处理及FTIR表征分析,未经处理者为对照组。将经过表面处理的纳米ZrO2颗粒按照质量比0.5%、1%、1.5%、2%、2.5%、3%和3.5%的添加量与PMMA混合,合成纳米ZrO2/PMMA复合材料,共7组。制作标准试件,进行表面硬度测试和三点弯曲测试,从每组中随机选取1个试件进行扫描电镜观察。采用SAS 6.12软件包对数据进行ANOVA单因素方差分析。结果:红外光谱图显示,经过表面处理的纳米ZrO2颗粒表面有硅烷偶联剂吸附。纳米ZrO2添加量为1.5%和2%组复合材料的表面硬度最佳(P<0.05)。1.5%组复合材料的挠曲强度最高(P<0.05),SEM观察断裂面为韧性断裂。结论:使用硅烷偶联剂能提高纳米ZrO2与PMMA的结合强度,经过表面处理的纳米ZrO2,能提高复合材料的机械性能,但加入量会影响纳米ZrO2的增强作用。纳米ZrO2以1.5%和2%的添加比例对基托材料的表面硬度增强效果最佳,以1.5%的添加比例对PMMA挠曲强度的增强效果最好。PURPOSE： To study the effect of polymethylmethacrylate（PMMA＇s） mechanical properties reinforced by nano ZrO2 particles with different filling amounts.METHODS： The nano ZrO2 particles were surface-treated by silane coupling agent（Z-6030） in 1.5wt% ratio,the untreated particles were regarded as the control group.The modified nano ZrO2 particles were mixed with the PMMA powders in proportion of 0.5%,1%,1.5%,2%,2.5%,3% and 3.5%,respectively.Then the nano ZrO2 /PMMA composites were synthesized.The specimens were examined by Vickers hardness test and three-point bending test,the surface of fracture was observed by SEM.All data were analyzed with ANOVA test by SAS 6.12 software package.RESULTS：Fourier transform infrared（FTIR） spectroscopy showed that the silane coupling agent linked to the nano ZrO2 particles＇surface after treating,the Vickers hardness was highest when the adding amount of nano ZrO2 particles was 1.5% and 2%（P〈0.05）.The flexural strength of nano ZrO2/PMMA composites in the proportion of 1.5% was the highest（P〈0.05）.SEM indicated that the ductile fracture existed on the surface of fracture.CONCLUSIONS： The silane coupling agent can enhance the bonding strength of nano ZrO2 particles and the PMMA matrix,the PMMA＇s mechanical properties could be improved by adding the nano ZrO2 particle in an appropriate proportion.1.5% and 2% of nano ZrO2 particles render the nanocomposite the maximal Vickers hardness,while 1.5% ZrO2 nanoparticles render the nanocomposite the maximal flexural strength.Supported by Research Fund of Science and Technology Commission of Shanghai Municipality（065CJ14048,09CJ1408900）.

关 键 词：纳米ZRO2 聚甲基丙烯酸甲酯 表面硬度 挠曲强度 

分 类 号：R783.1[医药卫生—口腔医学]