ISSN   1004-0595

CN  62-1095/O4

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刘坪, 唐健, 吴江, 江泽琦, 方建华, 冯彦寒. 氧化石墨烯的改性及其在矿物油中的摩擦学性能[J]. 摩擦学学报, 2020, 40(1): 30-39. DOI: 10.16078/j.tribology.2019110
引用本文: 刘坪, 唐健, 吴江, 江泽琦, 方建华, 冯彦寒. 氧化石墨烯的改性及其在矿物油中的摩擦学性能[J]. 摩擦学学报, 2020, 40(1): 30-39. DOI: 10.16078/j.tribology.2019110
LIU Ping, TANG Jian, WU Jiang, JIANG Zeqi, FANG Jianhua, FENG Yanhan. Modification of Graphene Oxide and Its Tribological Properties in Mineral Oil[J]. TRIBOLOGY, 2020, 40(1): 30-39. DOI: 10.16078/j.tribology.2019110
Citation: LIU Ping, TANG Jian, WU Jiang, JIANG Zeqi, FANG Jianhua, FENG Yanhan. Modification of Graphene Oxide and Its Tribological Properties in Mineral Oil[J]. TRIBOLOGY, 2020, 40(1): 30-39. DOI: 10.16078/j.tribology.2019110

氧化石墨烯的改性及其在矿物油中的摩擦学性能

Modification of Graphene Oxide and Its Tribological Properties in Mineral Oil

  • 摘要: 使用四种长链胺分别对多层、少层氧化石墨烯(MGO、FGO)进行表面功能化修饰,得到八种改性石墨烯(MGO-OAM、MGO-ODA、MGO-PIB、MGO-PEPA、FGO-OAM、FGO-ODA、FGO-PIB、FGO-PEPA). 使用场发射扫描电子显微镜(FESEM)、拉曼光谱仪(Raman)和傅里叶变换红外光谱仪(FT-IR)分别表征功能化过程对GO的微观形貌和分子结构的影响. 考察改性GO在 150SN基础油中的分散稳定性以筛选最优改性方法,并使用多功能摩擦磨损试验机评价改性GO在150SN矿物油中的摩擦学性能,结合磨损表面金相显微镜照片和拉曼光谱仪对磨损机制进行分析. 结果表明:通过酰胺化反应可在MGO、FGO表面成功接枝四种长链胺改性剂;改性MGO的分散稳定性优于改性FGO,其中 MGO-OAM、MGO-PIB的分散稳定性更佳;FGO的抗磨减摩性能优于MGO,且在一定载荷和添加量范围内,改性MGO均能有效提升150SN矿物油的摩擦学性能;改性GO在不同工况时的磨损机制主要表现为塑性变形、磨粒磨损和黏着磨损.

     

    Abstract: Eight modified graphene oxides were prepared by the surface functionalization of multilayer graphene oxide (MGO) and few layer graphene oxide (FGP) with four long chain amines as modifiers. Effects of functionalization process on the microstructure and molecular structure of graphene oxides were investigated by FESEM, Raman, and FT-IR. The dispersion stabilities of modified GO in 150SN mineral oil were investigated to screen the optimum modification method. Moreover, tribological properties of modified GO as an additive in 150SN oil were evaluated by tribo-tester, and the wear mechanisms were analyzed by the morphologies and Raman spectra of the worn surfaces. The results indicated that four long chain amine modifiers can be successfully grafted onto graphene surface by amidation reaction. The dispersion stability of MGO was better than that of FGO, especially for MGO-OAM and MGO-PIB. Anti-wear and friction-reducing ability of FGO was better than that of MGO, and the modified MGO effectively facilitated the tribological performance of 150SN mineral oil. The wear mechanisms under different conditions include plastic deformation, abrasive wear and adhesive wear.

     

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