CN-122012164-A - Environment-friendly bearing rust-preventive oil and preparation method thereof

CN122012164ACN 122012164 ACN122012164 ACN 122012164ACN-122012164-A

Abstract

The application discloses environment-friendly bearing rust preventive oil and a preparation method thereof, and relates to the technical field of metal protection, wherein the environment-friendly bearing rust preventive oil comprises, by weight, 45-55 parts of base oil, 4-6 parts of film forming agent, 3-7 parts of rust preventive, 0.6-1 part of antioxidant, 1.5-2.5 parts of auxiliary agent, 1-2 parts of surfactant and 0.2-0.4 part of pour point depressant, the base oil is castor oil base oil, the auxiliary agent is an L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide novel composite material, and the L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide novel composite material is prepared from, by weight, 2-3 parts of KH570 modified hollow mesoporous nano silicon dioxide, 200-300 parts of deionized water and 2-3 parts of L-tryptophan-chitosan derivative. The application has excellent rust resistance, environmental protection and oxidation stability.

Inventors

WANG SHUO
LI MANMAN
WANG TING
WANG WEIPAN
WANG XUEYU
KANG KEJIA
AI ZHAO
LI XIANYAO
WANG FEI
WANG WEI
LIANG XIAOKAI

Assignees

道骐科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260123

Claims (10)

1. The environment-friendly bearing rust preventive oil is characterized by comprising, by weight, 45-55 parts of base oil, 4-6 parts of film forming agent, 3-7 parts of rust preventive, 0.6-1 part of antioxidant, 1.5-2.5 parts of auxiliary agent, 1-2 parts of surfactant and 0.2-0.4 part of pour point depressant, wherein the base oil is castor oil base oil, and the auxiliary agent is a novel L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide composite material.
2. The environment-friendly bearing rust preventive oil disclosed by claim 1 is characterized in that the novel L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide composite material is prepared from the following raw materials, by weight, 2-3 parts of KH570 modified hollow mesoporous nano silicon dioxide, 200-300 parts of deionized water and 2-3 parts of L-tryptophan-chitosan derivatives.
3. The environment-friendly bearing rust preventive oil according to claim 1, wherein the preparation method of the castor oil-based base oil comprises the following steps: S1, adding ricinoleic acid, an organic solvent, a catalyst Novozyme435 and hydrogen peroxide into castor oil, carrying out oscillation reaction at a temperature of 40-50 ℃ under a water bath condition with a rotating speed of 200-250rpm, taking out a sample after 15-22 hours, carrying out vacuum filtration to remove the catalyst in reaction liquid, standing for layering, removing lower hydrogen peroxide, centrifuging an upper oil layer at a high speed to remove the catalyst and hydrogen peroxide which are not removed, washing with sodium bicarbonate solution and distilled water, removing a water layer, centrifuging an upper oil layer, removing water, and finally removing the organic solvent and residual water by reduced pressure rotary evaporation to obtain primary castor oil base oil; S2, adding isooctanol into the primary castor oil base oil obtained in the step S1, preheating, introducing nitrogen, dropwise adding concentrated sulfuric acid when the temperature of a reaction system reaches 70-80 ℃, and then heating to 100-110 ℃ for reacting for 12-24 hours to complete the ring-opening reaction; S3, adding hexanoic anhydride and 4-dimethylaminopyridine serving as a catalyst into the primary castor oil base oil subjected to ring opening modification obtained in the step S2, introducing nitrogen, heating to 75-85 ℃, reacting for 20-28h, adding distilled water into a flask, continuously reacting for 1-3h to convert organic anhydride into organic acid, washing the reaction solution with sodium bicarbonate solution and water, collecting upper-layer oil, and distilling under reduced pressure to remove water to obtain the castor oil base oil.
4. The environment-friendly bearing rust preventive oil according to claim 3, wherein the mass ratio of castor oil, organic solvent, catalyst Novozyme435, ricinoleic acid and hydrogen peroxide in S1 is 1:0.95-1:0.1-0.12:0.16-0.2:0.2-0.22.
5. The environment-friendly bearing rust preventive oil according to claim 3, wherein the mass ratio of isooctyl alcohol to concentrated sulfuric acid in the primary castor oil-based base oil in S2 is 1:2.8-3:0.006-0.0065.
6. The environment-friendly bearing rust preventive oil according to claim 3, wherein the mass ratio of the ring-opening modified primary castor oil base oil, the hexanoic anhydride and the catalyst 4-dimethylaminopyridine in S3 is 1:1-1.2:0.0003-0.0005.
7. The environment-friendly bearing rust preventive oil according to claim 2, wherein the preparation method of the novel L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide composite material comprises the following steps: adding 2-3 parts of KH570 modified hollow mesoporous nano-silica into 200-300 parts of deionized water, carrying out ultrasonic treatment for 1-2 hours to uniformly disperse the nano-silica in a system, then adding 2-3 parts of L-tryptophan-chitosan derivative, stirring and dissolving the nano-silica, magnetically stirring the solution for 3-5 hours at 50-60 ℃, centrifuging the mixed solution after the reaction is finished, and drying a supernatant liquid part at 60-70 ℃ for 65-80 hours to obtain the novel L-tryptophan-chitosan-hollow mesoporous nano-silica composite material.
8. The environment-friendly bearing rust preventive oil according to claim 2, wherein the preparation method of the L-tryptophan-chitosan derivative comprises the following steps: Adding 2-3 parts of chitosan powder into 120-160 parts of acetic acid solution with the concentration of 1% by weight, continuously stirring until the chitosan powder is completely dissolved to obtain chitosan solution, adding 5.64-8.46 parts of L-tryptophan into 60-90 parts of ethanol, carrying out ultrasonic heating and dissolving to obtain L-tryptophan solution, then mixing the chitosan solution and the L-tryptophan solution, magnetically stirring for 5-7 hours at 60-70 ℃, cooling to a room temperature state after the reaction is finished, adding sodium hydroxide solution to precipitate, carrying out suction filtration, washing the precipitate with deionized water and ethanol in sequence to remove impurities, and finally drying the washed product at 60-70 ℃ for 20-28 hours to obtain the L-tryptophan-chitosan derivative; The preparation method of the KH570 modified hollow mesoporous nano-silica comprises the following steps: Adding 0.08-0.12 part of silane coupling agent KH570 into 0.8-1.2 parts of water and 7-10.6 parts of absolute ethyl alcohol according to parts by weight, stirring and dissolving to obtain silane coupling agent solution, then mechanically stirring and dispersing for 10-30min, adjusting pH to 3-4, adding 2-3 parts of hollow mesoporous nano silicon dioxide, uniformly mixing, then dispersing for 30-50min by using an ultrasonic water bath, then heating to 70-80 ℃, carrying out reflux reaction for 10-14h under the protection of nitrogen, carrying out vacuum suction filtration after the reaction is finished, and drying an obtained sample to obtain KH570 modified hollow mesoporous nano silicon dioxide.
9. The environment-friendly bearing rust preventive oil according to claim 1, wherein the rust preventive agent is formed by compounding calcium petroleum sulfonate, zinc naphthenate and benzotriazole, and the mass ratio is 2-3:1-2:0.1-0.3; The film forming agent is oxidized paraffin butyl ester; The antioxidant is Vanlube 7723.
10. The method for preparing the environment-friendly bearing rust preventive oil according to any one of claims 1 to 9, which is characterized by comprising the following steps: 45-55 parts of base oil is heated and stirred at 50-60 ℃, 4-6 parts of film forming agent, 3-7 parts of antirust agent, 0.6-1 part of antioxidant, 1.5-2.5 parts of auxiliary agent, 1-2 parts of surfactant and 0.2-0.4 part of pour point depressant are sequentially added, the mixture is stirred at constant temperature of 50-60 ℃ for 2-4 hours at high speed, and the environment-friendly bearing antirust oil is obtained through 5 mu m bag filtration.

Description

Environment-friendly bearing rust-preventive oil and preparation method thereof Technical Field The application relates to the technical field of metal protection, in particular to environment-friendly bearing rust preventive oil and a preparation method thereof. Background Bearings can be generally divided into rings, rolling elements and cages, which are generally manufactured by different manufacturers, respectively. Bearing rings and rolling bodies need to be subjected to rust prevention treatment in the processes of processing, storing and transporting so as to prevent rust. The common material for rust prevention treatment is rust preventive oil, which is a temporary rust preventive material. Rust inhibitive oil mostly consists of base oil and rust inhibitive additives. The traditional rust-preventive oil mostly uses petroleum-based mineral oil as base oil, the non-renewable property of the oil-based mineral oil aggravates the exhaustion of resources, the oil-based mineral oil is difficult to biodegrade after being used and is easy to cause soil/water pollution, and meanwhile, the current petroleum-based mineral oil cannot completely meet the production technical requirements along with the progress of science and technology. Therefore, for sustainable development of countries and society, a class of green renewable lubricating oils must be developed as early as possible to replace traditional petroleum-based mineral oils. Vegetable oil is used as a natural lubricating oil and has the advantages of high viscosity index, low volatility, high flash point, excellent friction performance and large modification space, and most importantly, the vegetable oil is a green renewable resource. Therefore, the base oil prepared by taking the vegetable oil as the raw material can perfectly solve several crisis faced by the traditional petroleum-based mineral oil. However, the conventional vegetable oil-based rust preventive oil has poor oxidation stability and rust preventive capability, and is difficult to meet the requirement of long-time storage of the bearing. Disclosure of Invention The application provides an environment-friendly bearing rust preventive oil and a preparation method thereof in order to improve the rust preventive performance and oxidation stability of vegetable oil-based rust preventive oil. The application provides an environment-friendly bearing rust preventive oil, which adopts the following technical scheme: The environment-friendly bearing rust preventive oil comprises, by weight, 45-55 parts of base oil, 4-6 parts of film forming agent, 3-7 parts of rust preventive, 0.6-1 part of antioxidant, 1.5-2.5 parts of auxiliary agent, 1-2 parts of surfactant and 0.2-0.4 part of pour point depressant, wherein the base oil is castor oil base oil, and the auxiliary agent is a novel L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide composite material. Preferably, the novel L-tryptophan-chitosan-hollow mesoporous nano silicon dioxide composite material is prepared from the following raw materials, by weight, 2-3 parts of KH570 modified hollow mesoporous nano silicon dioxide, 200-300 parts of deionized water and 2-3 parts of L-tryptophan-chitosan derivatives. Preferably, the preparation method of the castor oil-based base oil comprises the following steps: S1, adding ricinoleic acid, an organic solvent, a catalyst Novozyme435 and hydrogen peroxide into castor oil, carrying out oscillation reaction at a temperature of 40-50 ℃ under a water bath condition with a rotating speed of 200-250rpm, taking out a sample after 15-22 hours, carrying out vacuum filtration to remove the catalyst in reaction liquid, standing for layering, removing lower hydrogen peroxide, centrifuging an upper oil layer at a high speed to remove the catalyst and hydrogen peroxide which are not removed, washing with sodium bicarbonate solution and distilled water, removing a water layer, centrifuging an upper oil layer, removing water, and finally removing the organic solvent and residual water by reduced pressure rotary evaporation to obtain primary castor oil base oil; S2, adding isooctanol into the primary castor oil base oil obtained in the step S1, preheating, introducing nitrogen, dropwise adding concentrated sulfuric acid when the temperature of a reaction system reaches 70-80 ℃, and then heating to 100-110 ℃ for reacting for 12-24 hours to complete the ring-opening reaction; S3, adding hexanoic anhydride and 4-dimethylaminopyridine serving as a catalyst into the primary castor oil base oil subjected to ring opening modification obtained in the step S2, introducing nitrogen, heating to 75-85 ℃, reacting for 20-28h, adding distilled water into a flask, continuously reacting for 1-3h to convert organic anhydride into organic acid, washing the reaction solution with sodium bicarbonate solution and water, collecting upper-layer oil, and distilling under reduced pressure to remove water to obtain the castor oil base oil. P