Synergistic Effects of Layered Double Hydroxide and MoS2 on the Performance of Lubricants

Author:

Zhou Weidong1,Li Yong2,Cheng Shutian3,He Yongdi1ORCID,Song Jinou1,Zhang Qiang2

Affiliation:

1. State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China

2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

3. SINOPEC Lubricant Co., Ltd., Beijing 100089, China

Abstract

In this study, layered double hydroxide (LDH) and molybdenum disulfide (MoS2) were used as additives to prepare lubricants. The morphology and particle distribution of the LDH and MoS2 were characterized using a scanning electron microscope and a laser particle size analyzer, respectively. Thermogravimetric analysis was used to compare the performance of the lubricants at high temperature. The extreme pressure and wear resistance performance of the lubricants were tested using a four-ball machine and a fretting-wear machine. Then, the lubricants were applied in a bolt fastener. The loosening torque and surface wear condition at high temperature were compared. By adding LDH and MoS2 to the lubricants, the extreme pressure and wear resistance performance and anti-seize performance at high temperature were improved significantly. The LDH showed better anti-seize performance than the MoS2 because of its strong and stable structure at high temperature. The MoS2 showed better anti-wear performance under a high load because of its soft layered structure. The MoS2 with a larger particle size showed better extreme pressure performance under a high load. The LDH and MoS2 played a synergistic effect under the conditions of high temperature and high load.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Reference45 articles.

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