PMMA/SiO2 纳米核壳型微球润滑添加剂制备及摩擦化学特性研究
毕业论文关键词：PMMA/ SiO2；合成；润滑油；抗磨减摩
Study on tribo-chemical properties and synthesis of nano PMMA/SiO2
Abstract: With TritonX - 100, the octanol、cyclohexane 、ammonia、tetraethyl orthosilicate synthesizing white nano silica by microemulsion method. The synthesis of PMMA/SiO2 lubricating additive is with the Silica dispersion and methyl methacrylate through the emulsifier free emulsion polymerization.The better reaction condition is when the tetraethyl orthosilicate and methyl methacrylate is 1:1, the reaction time is 4h, the reaction temperature is 70℃, and the most prolific rate of the product is 82.79%.It’s analyszed on PMMA/SiO2 with IR . On the four ball machine, it’s shown that antiwear and antifriction characteristic were determined on PMMA/SiO2 added to base oil,on which properties the addition of PMMA/SiO2 were investigated. It’s shown that wear the better on results,when the content of PMMA/SiO2 is 1.5%(wt%). It’s determined the largest non-card bite load PB of base oil, adding 1.5%(wt%) of PMMA/SiO2 in the base oil and adding the T202's base oil, on results it’s shown that the base oil after adding T202,its PB is maximum. Finally, it’s determined that tribo-chemical characteristic about the compound of PMMA/SiO2 with T202, the friction and wear performance impact on these two adding amount of base oil.It’s shown that the anti-wear of lubricating oil gains its better effects on results,when add 1.5%(wt%) of PMMA/SiO2 and add 1%(wt%) of T202 synergied.
Key words: PMMA/SiO2;synthesis;lubricants;antiwear and antifriction
目录
1 绪论 1
1.1 润滑剂 1
1.1.1润滑剂的作用 2
1.1.2 润滑机理 2
1.2 纳米润滑油添加剂 3
1.2.1 纳米材料的结构和特性 3
1.2.2 纳米润滑添加剂的分类[7] 3
1.2.3 纳米润滑油添加剂的作用 4
1.2.4 纳米润滑添加剂的应用现状 4
1.2.4.1纳米润滑添加剂在汽车节约能源方面的应用 4
1.2.4.2纳米润滑添加剂在改善汽车尾气排放方面的应用 4
1.2.4.3纳米润滑油添加剂在环保方面的作用 5
1.2.4.4纳米润滑油添加剂的其他应用 5
1.2.5 纳米润滑油添加剂的作用机理 6
1.2.6 纳米粒子在润滑油中的稳定性 7
1.2.6.1 纳米粒子表面基团发生化学反应或化学吸附 7
1.2.6.2 聚合物包覆纳米粒子 7
1.2.6.3 高能量表面改性 7
1.2.7 纳米润滑添加剂的发展方向 8
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