一种基于共价功能化氧化石墨烯量子点的新型润滑剂。

A Novel Lubricant Based on Covalent Functionalized Graphene Oxide Quantum Dots.

作者信息

Wolk Andreas, Rosenthal Marta, Neuhaus Stephan, Huber Klaus, Brassat Katharina, Lindner Jörg K N, Grothe Richard, Grundmeier Guido, Bremser Wolfgang, Wilhelm René

机构信息

University of Paderborn, Department of Chemistry, Technical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany.

University of Paderborn, Department of Chemistry, Organic Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany.

出版信息

Sci Rep. 2018 Apr 11;8(1):5843. doi: 10.1038/s41598-018-24062-2.

Dodecyl amine edge functionalized few-layer graphene oxide quantum dots were synthesized in good yields. The covalent functionalization was demonstrated with NMR and AFM-IR. The resulting structure and particle size was measured with AFM and HRTEM. The thermal stability of the compound was investigated and showed a stability of up to 220 °C. The modified graphene oxide quantum dots showed excellent solubility in various organic solvents, including ethers, methanol, toluene, n-hexane, heptane, xylene, dichloromethane and toluene. The stability of a resulting toluene solution was also proven by static light scattering measurements over several days. The excellent solubility gives the possibility of an efficient and fast spray application of the functionalized graphene oxide quantum dots to steel surfaces. Hence, the macroscopic friction behavior was investigated with a Thwing-Albert FP-2250 friction tester. A thin film of the dodecyl amine functionalized graphene oxide quantum dots on steel lowered the friction coefficient from 0.17 to 0.11 and revealed a significant corrosion inhibition effect.

以高收率合成了十二烷基胺边缘功能化的少层氧化石墨烯量子点。通过核磁共振（NMR）和原子力显微镜红外光谱（AFM-IR）证明了共价功能化。用原子力显微镜（AFM）和高分辨率透射电子显微镜（HRTEM）测量了所得结构和粒径。对该化合物的热稳定性进行了研究，结果表明其稳定性高达220°C。改性氧化石墨烯量子点在包括醚、甲醇、甲苯、正己烷、庚烷、二甲苯、二氯甲烷和甲苯在内的各种有机溶剂中表现出优异的溶解性。通过数天的静态光散射测量也证明了所得甲苯溶液的稳定性。优异的溶解性使得功能化氧化石墨烯量子点能够高效快速地喷涂到钢表面。因此，使用Thwing-Albert FP-2250摩擦测试仪研究了宏观摩擦行为。钢表面上的十二烷基胺功能化氧化石墨烯量子点薄膜将摩擦系数从0.17降低到0.11，并显示出显著的缓蚀效果。