PMMA／EG纳米杂化材料的制备及作为润滑油添加剂的抗磨性能研究

PREPARATION OF PMMA/EG HYBRID NANO-COMPOSITE AND ITS ANTI-WEAR PERFORMANCE AS LUBE OIL ADDITIVE

用原位乳液聚合法制备了聚甲基丙烯酸甲酯/膨胀石墨(PMMA/EG)纳米杂化材料。采用X射线衍射(XRD)、红外光谱(FT-IR)、透射电子显微镜(TEM)和热分析(TGA-DSC)等仪器对其进行表征,结果表明所制备的PMMA/EG纳米杂化材料为椭圆结构,膨胀石墨分散在PMMA基体中,并被PMMA所包裹。用MWW-1P型万能摩擦磨损试验机考察其作为10号机油添加剂时的抗磨性能,结果表明所制备的PMMA/EG作为10号机油添加剂时对钢-钢摩擦副表现出优异的抗磨作用,其最优添加量为1.5%。EDX能谱分析结果表明添加剂在磨斑表面形成了富碳表面膜。

Polymethyl methacrylate/expanded graphite （PMMA/EG）hybrid nano-composite was synthesized through in-situ emulsion polymerization of methyl methacrylate in the presence of EG. The as-prepared composite was characterized by XRD, FT-IR, TEM and thermal analysis （TGA-DSC）. The test results showed that the prepared PMMA/EG was elliptical, and EG was dispersed in the polymer matrix and enclosed by PMMA. The effect of using said nano-composite as lube additive on the tribological properties of 10^# machine oil was investigated using a MWW-IP friction and wear tester. The evaluation results showed that PMMA/EG exhibited excellent anti-wear behavior under various loads. The optimal dosage of PMMA/EG in the 10^# machine oil was suggested to be 1.5%. The results of EDX showed that a carbon enriched film was formed on the worn steel surface to protect the steel surface for further wearing.