纳米二氧化硅−石墨烯−六方氮化硼复合有机硅涂层的制备及其高温条件下的摩擦学性能  

Preparation of nano-silica-graphene-hexagonal boron nitride composite silicone coating and its tribological properties under high temperature conditions

作　　者：郑植 白涛[1] ZHENG Zhi;BAI Tao(College of Mechanical Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学机械工程学院,上海201620

出　　处：《电镀与涂饰》2020年第20期1420-1426,共7页Electroplating & Finishing

摘　　要：利用三乙烯四胺(TETA)改性氧化石墨烯(GO)以提高其分散性,并通过红外光谱仪、拉曼光谱仪和X射线衍射仪分析了改性后得到的RGO−TETA的结构。结果表明TETA成功接入了GO。将RGO−TETA、纳米SiO2和六方氮化硼(h-BN)球磨混合成复合粉体,并加到环氧改性有机硅树脂(ESR)中制得复合涂料,再涂覆在316L不锈钢表面制成SiO2–RGO–h-BN/ESR复合涂层。利用高速往复式摩擦磨损试验机研究了不同纳米SiO2填充量的复合涂层在200°C温度条件以及含4%纳米SiO2的复合涂层在室温至250°C范围内的摩擦学性能,探讨了复合涂层的磨损机制。由于形成了转移膜,纳米SiO2填充量为4%的SiO2–RGO–h-BN/ESR复合涂层在200°C下具有最佳的耐磨性,磨损率相较于150°C时降低了76.7%。Graphene oxide(GO)was modified with triethylenetetramine(TETA)to improve its dispersibility.The structure of the modification product RGO−TETA was characterized by infrared spectroscopy,Raman spectrometry and X-ray diffractometry.The results showed that TETA was successfully attached to GO.A composite powder was obtained by ball milling with RGO-TETA,nano-SiO2 and hexagonal boron nitride(h-BN),and then added to an epoxy-modified silicone resin(ESR),forming a composite paint which was to be coated on the surface of 316L stainless steel to make a SiO2–RGO–h-BN/ESR composite coating.The tribological properties of the composite coatings with different nano-SiO2 contents at 200°C and the tribology of the composite coating containing 4%of nano-SiO2 from room temperature to 250°C were studied by using a high-speed reciprocating friction and wear tester.The wear mechanisms of the composite coatings were studied.Due to the formation of transfer film,the SiO2–RGO–h-BN/ESR composite coating with 4%of nano-SiO2 had the best wear resistance at 200°C with a mass loss rate of 76.7%lower than that tested at 150°C.

关 键 词：纳米二氧化硅 氧化石墨烯 六方氮化硼 环氧改性有机硅树脂 分散性 高温摩擦学 

分 类 号：TB332[一般工业技术—材料科学与工程]