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使用硅烷偶联剂KH560对纳米Si3N4和Al2O3进行了改性,随后将其分别填充到PTFE树脂中制备了PTFE-纳米粒子复合材料,研究了不同KH560含量对复合材料密度、硬度,力学性能及摩擦磨损性能的影响。结果表明,纳米Si3N4经质量分数6%的KH560改性后,填充制备的PTFE复合材料其拉伸强度、断裂伸长率与未经改性纳米Si3N4填充复合材料相比,磨耗量高、硬度低,但密度、摩擦系数等相差不大;纳米Al2O3分别经质量分数4%的KH560改性后,对应复合材料的拉伸强度和断裂伸长率大于未改性纳米Al2O3填充复合材料,但密度、硬度、磨耗量及摩擦系数等相差不大。
The silane coupling agent KH560 was used to modify the nano-Si3N4 and Al2O3. Then, the nano-Si3N4 and Al2O3 were modified respectively, then filled into PTFE resin respectively to prepare PTFE-nano-particle composites. The effects of different KH560 content on the density, hardness, Impact of wear properties. The results show that the tensile strength and elongation at break of nano-Si3N4 modified by KH560 with mass fraction of 6% are higher than the unmodified nano-Si3N4 composite with high wear and hardness , But the density and coefficient of friction are similar. The tensile strength and elongation at break of the nano-Al2O3 are respectively higher than that of the unmodified nano-Al2O3 filled composites after being modified by 4% KH560. However, the density, Hardness, wear and friction coefficient is not much difference.