Method for detecting stability of phenolic substance on friction interface

Abstract

The invention discloses a method for detecting the stability of a phenolic substance on a friction interface. The method comprises the following steps: adding the phenolic substance into lubricating oil to prepare a phenolic lubricating oil sample for wear experiments; and testing changes of phenolic hydroxyl functional groups of the lubricating oil sample before and after wearing by using an infrared spectrum to determine the stability of the phenolic substance in a wear process. The changes of the functional groups of the sample on a wear interface are tested by virtue of an infrared spectrum method, thereby determining the stability of the phenolic substance on the friction interface; and the test condition is mild (25-75 DEG C and normal pressure), the test equipment is simple, the operation is simple and quick, the time consumption is low, the cost is low, the safety is high, and the accuracy is very high. Experiments show that the stability of the phenolic substance on the friction interface can be effectively identified by observing infrared spectrum changes of the sample before and after wearing.

Description

technical field [0001] The invention belongs to the technical field of engineering lubrication, and in particular relates to a detection method for the stability of phenolic substances on a friction interface. Background technique [0002] Phenols There are many kinds of compounds, and they have a very wide range of uses no matter in life or industry. Especially as a typical antioxidant, it is widely used in lubrication, polymer materials and other industries, so the test method for the antioxidant performance of phenolic substances is particularly important. At present, the main test methods are: oxygen bomb test method, oxidation tube test method, PSDC high pressure differential scanning calorimetry, all three methods have been proved to be effective in identifying the oxidation resistance of lubricating oil / grease, and are often used in Antioxidant screening. The three methods have the advantages of accurate results, but at the same time there are some disadvantages: ...

AI Technical Summary

Problems solved by technology

The three methods have the advantages of accurate results, but at the same time there are some disadvantages: the test takes a long time and the cost is high; the test conditions are harsh, requiring high temperature and high pressure, and the safety is relatively low; the operation is cumbersome and requires high requirements for the experimenter

However, there are still some unresolved problems: the test process still takes a long time; and the operating conditions have not improved compared with the traditional rotary oxygen bomb method, which is more harsh and less safe; the experimenter has higher requirements

But there are still some unresolved problems: long time-consuming, high test cost; harsh test conditions

However, there are still some unresolved problems: long time-consuming, high test cost; harsh test conditions; cumbersome operation, high requirements for operators

However, no new test method has been proposed, and the test process cannot be effectively improved on the premise of ensuring the accuracy of the test. There are still problems such as harsh test conditions, cumbersome operations, and long time consumption.

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