2,5-二巯基-1,3,4-噻二唑-聚乙二醇共聚物纳米微粒的制备及其摩擦学行为

Preparation and Tribological Behavior of Nanoparticles of Copolymer of 2,5-Dimercapto-1,3,4-Thiadiazole-Poly(ethylene oxide)

合成了大分子主链中含噻二唑环的共聚物纳米微粒,并用高分辨透射电子显微镜、傅立叶红外光谱仪和热分析系统等对该纳米微粒进行了表征,用MRS1-J型和MRS-10A型四球摩擦磨损试验机考察了共聚物纳米微粒作为高水基润滑添加剂的摩擦学性能.结果表明,该共聚物纳米微粒能分散于水中,且具有较好的极压抗磨性能.

The nanoparticles of copolymer containing 2,5-dialkoxymethylthio-1,3,4-thiadiazoles in the main chain were chemically synthesized. The nanoparticles were characterized by means of high resolution transmittance electron microscopy and Fourier transformation infrared spectrometry. The thermal stability of the nanoparticles was examined by means of differential thermal analysis (DTA) and differential thermogravimetry (DTG). The tribological properties of the prepared nanoparticles as the additive in water were evaluated with a four-ball machine. The results showed that the nanoparticles of the copolymer as the additive increased the friction-reducing and antiwear ability and the load-carrying capacity of water significantly. This was supposed to be related to the physical adsorption of the additive containing active N and S elements on the steel surface and their tribochemical reaction thereon at extended load and test duration.