CN115651739A - Degradable long-acting lubricating oil and preparation method thereof - Google Patents
Degradable long-acting lubricating oil and preparation method thereof Download PDFInfo
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Abstract
The invention discloses degradable long-acting lubricating oil and a preparation method thereof, and relates to the technical field of lubricating oil. The invention firstly uses the near spherical nano-zinc oxide, 2- [4 (2-methyl propenyl) phenyl ] propionic acid and 1- (2-acetyl-3-hydroxyl phenoxy) -2,3-propylene oxide to prepare the modified nano-zinc oxide; then, mixing amino dodecyl styrene and glycidyl methacrylate to prepare a viscosity index improver; mixing the modified nano zinc oxide and the viscosity index improver to prepare a self-made additive; finally, the castor oil and the self-made additive are mixed to prepare the degradable long-acting lubricating oil. The degradable long-acting lubricating oil prepared by the invention has good wear resistance, oxidation resistance, emulsification resistance and high-temperature viscosity.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to degradable long-acting lubricating oil and a preparation method thereof.
Background
Lubricating oil is generally used on various automobile transmissions, mechanical equipment and precision instruments to reduce friction and protect machines and workpieces; the mineral base lubricating oil and the synthetic base lubricating oil cannot be biodegraded, have serious ecological toxicity, seriously pollute the ecological environment after being abandoned, and the bio-based lubricating oil has natural biodegradability and better accords with the environmental protection concept.
When the lubricating oil is used in a humid environment, the lubricating oil can be contacted with water to form emulsion, so that the performance of the lubricating oil is reduced; mechanical equipment also generates certain abrasion during operation, and long-term friction can reduce the performance of the equipment; in order to enable the lubricating oil to be used in mechanical equipment with large temperature change such as an engine, the lubricating oil must keep the viscosity thereof stable and unchanged in a wide temperature range, and also must not be thermally oxidized in a high-temperature environment to avoid the reduction of the lubricating performance thereof; therefore, a degradable long-acting lubricating oil with good wear resistance, oxidation resistance, emulsification resistance and high-temperature viscosity is designed and developed.
Disclosure of Invention
The invention aims to provide degradable long-acting lubricating oil and a preparation method thereof, which are used for solving the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a degradable long-acting lubricating oil comprises castor oil and a self-made additive.
Further, the homemade additive is prepared from modified nano zinc oxide and a viscosity index improver.
Furthermore, the modified nano-zinc oxide is prepared from the subsphaeroidal nano-zinc oxide, 2- [4 (2-methylpropenyl) phenyl ] propionic acid and 1- (2-acetyl-3-hydroxyphenoxy) -2,3-propylene oxide.
Further, the subsphaeroidal nano zinc oxide is prepared from zinc acetate and sodium oleate.
Further, the viscosity index improver is prepared from aminododecyl styrene and glycidyl methacrylate.
Further, a preparation method of the degradable long-acting lubricating oil mainly comprises the following preparation steps:
(1) At the temperature of 120 to 130 ℃, adding the subsphaeroidal nano zinc oxide and 2- [4 (2-methylpropenyl) phenyl ] propionic acid according to the mass ratio of 1:2~1:3, mixing, stirring for 5 to 7min at 30 to 40r/min, adding cerium sulfate with the mass of 0.1 to 0.2 time of the subsphaeroidal nano zinc oxide, continuously stirring for 1 to 2h, then adding 1- (2-acetyl-3-hydroxyphenoxy) -2,3-epoxypropane with the mass of 0.8 to 1 time of the subsphaeroidal nano zinc oxide, stirring for 4 to 6min at 80 to 120r/min, adding H beta zeolite with the mass of 0.08 to 0.2 time of the subsphaeroidal nano zinc oxide, continuously stirring for 14 to 1695 min, cooling to 70 to 80 ℃, adding trialkylaluminum with the mass of 0.08 to 0.2 time of the subsphaeroidal nano zinc oxide, and stirring for 20 to 30min at 50 to 60r/min to prepare the modified nano zinc oxide;
(2) At 75 to 85 ℃, mixing azodiisobutyronitrile, aminododecylstyrene and glycidyl methacrylate according to a mass ratio of 1:5:15 to 1:10:50, mixing, and stirring for 5 to 7min at the speed of 30 to 40r/min to prepare a mixed solution D; dripping the mixed solution D into toluene at the speed of 10-20ml/min, wherein the mass of the toluene is 6~8 times that of the mixed solution D, keeping the temperature for 2-3h after dripping, adding methanol at the mass of 3~5 times that of the mixed solution D, and stirring for 50-60min at the speed of 40-70r/min; filtering to obtain a precipitate A; adding the precipitate A into acetone of which the mass is 2~4 times, stirring for 6-10min at 50-60r/min, then adding methanol of which the mass is 2~4 times that of the precipitate A, continuously stirring for 20-30min, filtering, repeating the step 2~4 times, and drying for 2-3h at 30-40 ℃ and the vacuum degree of 0-0.01MPa to prepare the viscosity index improver;
(3) Under the conditions of 75 to 85 ℃, 0.1 to 0.3MPa and nitrogen protection, the modified nano zinc oxide, the viscosity index improver, the trimethylolethane and the potassium hydroxide are mixed according to the mass ratio of 1:1.8:0.2:7~1:2.2:0.3:8, mixing, stirring for 36 to 40min at 80 to 120r/min, adding hydrochloric acid to regulate the pH to 6.9 to 7.1, then adding an adsorbent with the quality of the modified nano zinc oxide being 0.3 to 0.5 times, drying and dehydrating for 7 to 8h at the temperature of 35 to 40 ℃ and the vacuum degree of 0 to 0.01MPa, filtering, adding absolute ethyl alcohol with the quality of the modified nano zinc oxide being 7~8 times, stirring for 6 to 10min at 50 to 60r/min, dripping acetic acid with the quality of the modified nano zinc oxide being 0.05 to 0.08 times, heating to 86 to 90 ℃, stirring for 30 to 40min at 20 to 40r/min, and drying for 24 to 26h at 39 to 45 ℃ to prepare the self-made additive; mixing a self-made additive and castor oil according to a mass ratio of 1:80 to 1:120, and stirring for 5 to 7min at the speed of 30 to 40r/min to prepare the degradable long-acting lubricating oil.
Further, the preparation method of the subsphaeroidal nano zinc oxide in the step (1) comprises the following steps: mixing sodium oleate and cyclohexanol according to the mass ratio of 1:50 to 1:60, mixing, and stirring for 20 to 50r/min for 20 to 30min to prepare a mixed solution A; zinc acetate and absolute ethyl alcohol are mixed according to the mass ratio of 1:35 to 1:41, mixing, performing ultrasonic dispersion for 20 to 40min, and stirring for 36 to 50min at the speed of 350 to 360r/min to prepare a mixed solution B; ammonia water and absolute ethyl alcohol are mixed according to the mass ratio of 1:25 to 1:35, stirring for 7 to 15min at the speed of 50 to 60r/min to prepare a mixed solution C; and (3) mixing the mixed solution B and the mixed solution C according to a mass ratio of 1:0.9 to 1:1.1, stirring for 2 to 3h at 120 to 150r/min, centrifugally washing for 3~5 times at 12000 to 15000r/min, adding the mixed solution A with the mass 1 to 1.2 times of that of the mixed solution B, heating to 115 to 125 ℃, continuously stirring for 3 to 4h, and drying for 7 to 8h at 40 to 50 ℃ to prepare the subsphaeroidal nano zinc oxide.
Further, the preparation method of the amino dodecyl styrene in the step (2) comprises the following steps: mixing 4-dodecyl styrene, ammonia water and hydrogen peroxide according to a mass ratio of 1:30:6~1:50:8, stirring for 9 to 10min at the speed of 20 to 50r/min, heating to 40 to 60 ℃, adding a catalyst with the mass of 0.8 to 1 time of that of 4-dodecylstyrene, and continuously stirring for 3 to 9 hours to prepare the aminododecylstyrene.
Further, the catalyst is Cu-SiO 2 。
Further, the adsorbent in the step (3) is magnesium hexasilicate.
Compared with the prior art, the invention has the following beneficial effects:
the degradable long-acting lubricating oil prepared by the invention comprises castor oil and a self-made additive; wherein, the self-made additive is prepared by mixing modified nano zinc oxide and a viscosity index improver; the modified nano-zinc oxide is prepared by mixing subsphaeroidal nano-zinc oxide, 2- [4 (2-methylpropenyl) phenyl ] propionic acid and 1- (2-acetyl-3-hydroxyphenoxy) -2,3-propylene oxide; the viscosity index improver is prepared by mixing amino dodecyl styrene and glycidyl methacrylate.
Firstly, the surface hydroxyl of the nearly spherical nano zinc oxide and 2- [4 (2-methyl propenyl) phenyl ] propionic acid are subjected to esterification reaction, part of 2- [4 (2-methyl propenyl) phenyl ] propionic acid is self-polymerized to coat the nano zinc oxide, part of 2-4 (2-methyl propenyl) phenyl ] propionic acid is subjected to alkylation reaction with 2-methyl propylene on the 2- "4 (2-methyl propenyl) phenyl ] propionic acid and phenol on 1- (2-acetyl-3-hydroxy phenoxy) -2,3-epoxypropane to generate o-tert-butylphenol, hydrogen atoms on the phenolic hydroxyl of the o-tert-butylphenol are easy to fall off from molecules and react with peroxy radicals to generate phenoxy radicals, steric hindrance has stabilization effect on the phenoxy radicals, the chain reaction of thermal oxidation aging is terminated, and the modified nano zinc oxide has the anti-oxidation effect.
Secondly, amino dodecyl styrene and glycidyl methacrylate are copolymerized through carbon-carbon double bonds to form a polymethyl methacrylate high molecular polymer, the polymethyl methacrylate high molecular polymer is in an irregular linear group shape in castor oil, and when the polymethyl methacrylate high molecular polymer is used in a high-temperature environment, the polymethyl methacrylate high molecular polymer is continuously expanded and stretched, so that the effective volume of the viscosity index improver is increased, the flow resistance of the castor oil is increased, and the high-temperature viscosity of the degradable long-acting lubricating oil is further enhanced; the modified nano zinc oxide reacts with an epoxy group on the viscosity index improver through ring opening to generate a polyether compound containing a hydrophobic structure and a hydrophilic structure, and a carbonyl group on the modified nano zinc oxide reacts with an amino group on the viscosity index improver to form a diamine bridge bond, so that the nano zinc oxide with a nearly spherical structure is firmly fixed on the viscosity index improver, and the wear resistance of the degradable long-acting lubricating oil is enhanced; the viscosity index improver is introduced into the modified nano zinc oxide, so that the self-made additive can be well dispersed in castor oil, and the anti-emulsification effect of the degradable long-acting lubricating oil is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to more clearly illustrate the method provided by the present invention, the following examples are used to illustrate the method for testing each index of the degradable long-acting lubricating oil prepared in the following examples as follows:
wear resistance: the degradable long-acting lubricating oil prepared in the same mass example and the comparative example is subjected to an abrasion test by adopting a SRV-IV type high-frequency reciprocating friction tester of OPTIMOL company in Germany under the test conditions of load 300N, frequency 20Hz, stroke 2mm and temperature 150 ℃, and the abrasion resistance of a test sample is judged according to the size of the abrasion spot diameter.
Oxidation resistance: the degradable long-acting lubricating oil prepared in the same quality example and the comparative example is measured by a Pressurized Differential Scanning Calorimetry (PDSC) test which is carried out on a Perkinelmer7 series thermal analyzer, the oxidation performance of the lubricating oil is evaluated by a static method, the temperature is set to be 220 ℃, and the oxidation stability of the lubricating oil is evaluated by measuring the time of the oil undergoing an oxidation reaction, wherein the time is called an oxidation induction period.
And (3) emulsion resistance: taking the degradable long-acting lubricating oil prepared in the same mass embodiment and the comparative example, and testing the anti-emulsifying property of the lubricating oil by adopting a standard GB/T7305; the test temperature was 54 ℃, the same volume of the long-acting degradable lubricating oil and water were mixed with stirring, and the water-splitting time for the emulsion layer to decrease to 3ml was recorded.
High-temperature viscosity: the degradable long-acting lubricating oil prepared in the same quality example and the comparative example is used, and GB265 is adopted to test the kinematic viscosity of the degradable long-acting lubricating oil at 100 ℃.
Example 1
(1) Mixing sodium oleate and cyclohexanol according to the mass ratio of 1:50, stirring for 20min at the speed of 20r/min to prepare a mixed solution A; zinc acetate and absolute ethyl alcohol are mixed according to the mass ratio of 1:35, carrying out ultrasonic dispersion for 20min, and stirring at 350r/min for 36 to 50min to prepare a mixed solution B; ammonia water and absolute ethyl alcohol are mixed according to the mass ratio of 1:25, stirring for 7min at the speed of 50r/min to prepare a mixed solution C; at 40 ℃, mixing the mixed solution B and the mixed solution C according to a mass ratio of 1:0.9, stirring for 2h at 120r/min, centrifugally washing for 3 times at 12000r/min, adding the mixed solution A with the mass 1 time that of the mixed solution B, heating to 115 ℃, continuing stirring for 3h, and drying for 7h at 40 ℃ to prepare the near-spherical nano zinc oxide; at 120 ℃, mixing subsphaeroidal nano zinc oxide and 2- [4 (2-methylpropenyl) phenyl ] propionic acid according to a mass ratio of 1:2, mixing, stirring for 5min at 30r/min, adding cerium sulfate which is 0.1 time of the mass of the nearly spherical nano zinc oxide, continuously stirring for 1H, then adding 1- (2-acetyl-3-hydroxyphenoxy) -2,3-epoxypropane which is 0.8 time of the mass of the nearly spherical nano zinc oxide, stirring for 4min at 80r/min, adding H beta zeolite which is 0.08 time of the mass of the nearly spherical nano zinc oxide, continuously stirring for 14min, cooling to 70 ℃, adding trialkylaluminum which is 0.08 time of the mass of the nearly spherical nano zinc oxide, and stirring for 20min at 50r/min to obtain the modified nano zinc oxide;
(2) Mixing 4-dodecyl styrene, ammonia water and hydrogen peroxide according to a mass ratio of 1:30:6 mixing, stirring for 9min at 20r/min, heating to 40 ℃, adding Cu-SiO with the mass of 0.8 time of that of 4-dodecyl styrene 2 Continuously stirring for 3 hours to prepare amino dodecyl styrene; at 75 ℃, mixing azodiisobutyronitrile, aminododecyl styrene and glycidyl methacrylate according to the mass ratio of 1:5:15, mixing, and stirring for 5min at the speed of 30r/min to prepare a mixed solution D; dripping the mixed solution D into toluene at a rate of 10ml/min, wherein the mass of the toluene is 6 times that of the mixed solution D, keeping the temperature for 2 hours after dripping, adding methanol at a mass of 3 times that of the mixed solution D, and stirring for 50 minutes at a rate of 40 r/min; filtering to obtain a precipitate A; adding the precipitate A into acetone with the mass 2 times of that of the precipitate A, stirring for 6min at 50r/min, adding methanol with the mass 2 times of that of the precipitate A, continuously stirring for 20min, filtering, repeating the steps for 2 times, and drying for 2h at 30 ℃ and under the vacuum degree of 0MPa to obtain the viscosity index improver;
(3) Under the conditions of 75 ℃, 0.1MPa and nitrogen protection, the modified nano zinc oxide, the viscosity index improver, the trimethylolethane and the potassium hydroxide are mixed according to the mass ratio of 1:1.8:0.2:7, mixing, stirring for 36min at a speed of 80r/min, adding hydrochloric acid to adjust the pH value to 6.9, then adding magnesium hexasilicate with the mass of 0.3 time that of the modified nano zinc oxide, drying and dehydrating for 7h at a temperature of 35 ℃ and a vacuum degree of 0MPa, filtering, adding absolute ethyl alcohol with the mass of 7 times that of the modified nano zinc oxide, stirring for 6min at a speed of 50r/min, then dripping acetic acid with the mass of 0.05 time that of the modified nano zinc oxide, heating to 86 ℃, stirring for 30min at a speed of 20r/min, and drying for 24h at a temperature of 39 ℃ to obtain the self-made additive; mixing a self-made additive and castor oil according to a mass ratio of 1:80, and stirring for 5min at the speed of 30r/min to prepare the degradable long-acting lubricating oil.
Example 2
(1) Mixing sodium oleate and cyclohexanol according to the mass ratio of 1:55, stirring at 35r/min for 25min to prepare a mixed solution A; zinc acetate and absolute ethyl alcohol are mixed according to the mass ratio of 1:39, mixing, performing ultrasonic dispersion for 30min, and stirring for 43min at 355r/min to prepare a mixed solution B; ammonia water and absolute ethyl alcohol are mixed according to the mass ratio of 1:30, stirring for 11min at the speed of 55r/min to prepare a mixed solution C; at the temperature of 45 ℃, mixing the mixed solution B and the mixed solution C according to the mass ratio of 1:1, mixing, stirring for 2.5h at 135r/min, centrifugally washing for 4 times at 13500r/min, adding a mixed solution A with the mass 1.1 times that of the mixed solution B, heating to 120 ℃, continuously stirring for 3.5h, and drying for 7.5h at 45 ℃ to obtain the near-spherical nano zinc oxide; at 125 ℃, mixing subsphaeroidal nano zinc oxide and 2- [4 (2-methylpropenyl) phenyl ] propionic acid according to a mass ratio of 1:2.5, stirring for 6min at 35r/min, adding cerium sulfate with the mass of 0.15 time of that of the near-spherical nano zinc oxide, continuously stirring for 1.5H, then adding 1- (2-acetyl-3-hydroxyphenoxy) -2,3-epoxypropane with the mass of 0.9 time of that of the near-spherical nano zinc oxide, stirring for 5min at 100r/min, adding H beta zeolite with the mass of 0.14 time of that of the near-spherical nano zinc oxide, continuously stirring for 15min, cooling to 75 ℃, adding trialkylaluminum with the mass of 0.14 time of the near-spherical nano zinc oxide, and stirring for 25min at 55r/min to obtain the modified nano zinc oxide;
(2) Mixing 4-dodecyl styrene, ammonia water and hydrogen peroxide according to a mass ratio of 1:40:7, stirring for 9.5min at the speed of 35r/min, heating to 50 ℃, and adding Cu-SiO with the mass of 0.9 time of that of 4-dodecyl styrene 2 Continuously stirring for 6 hours to prepare amino dodecyl styrene; at 80 ℃, mixing azodiisobutyronitrile, aminododecyl styrene and glycidyl methacrylate according to the mass ratio of 1:7.5:32.5, and stirring at 35r/min for 6min to prepare a mixed solution D; dropping the mixed solution D into toluene at a rate of 15ml/min, wherein the mass of the toluene is 7 times that of the mixed solution D, keeping the temperature for 2.5h after dropping, adding methanol at a mass of 4 times that of the mixed solution D, and stirring at a rate of 55r/min for 55min; filtering to obtain a precipitate A; adding the precipitate A into acetone with a mass of 3 times of the precipitate A, stirring at 55r/min for 8min, adding methanol with a mass of 3 times of the precipitate A, stirring for 25min, filtering, repeating the above steps for 3 times, drying at 35 deg.C under vacuum of 0.05MPa for 2.5 hr, and making into final productObtaining a viscosity index improver;
(3) Under the conditions of 80 ℃, 0.2MPa and nitrogen protection, the modified nano zinc oxide, the viscosity index improver, the trimethylolethane and the potassium hydroxide are mixed according to the mass ratio of 1:2:0.25:7.5, mixing, stirring for 38min at 100r/min, adding hydrochloric acid to adjust the pH value to 7, then adding magnesium hexasilicate with the mass of 0.4 time that of the modified nano zinc oxide, drying and dehydrating for 7.5h at 37.5 ℃ and the vacuum degree of 0.005MPa, filtering, adding absolute ethyl alcohol with the mass of 7.5 times that of the modified nano zinc oxide, stirring for 8min at 55r/min, then dripping acetic acid with the mass of 0.065 time that of the modified nano zinc oxide, heating to 88 ℃, stirring for 35min at 30r/min, and drying for 25h at 42 ℃ to prepare the self-made additive; the self-made additive and castor oil are mixed according to the mass ratio of 1:100, stirring for 6min at 35r/min to prepare the degradable long-acting lubricating oil.
Example 3
(1) Mixing sodium oleate and cyclohexanol according to the mass ratio of 1:60, stirring for 30min at the speed of 50r/min to prepare a mixed solution A; zinc acetate and absolute ethyl alcohol are mixed according to the mass ratio of 1:41 mixing, ultrasonically dispersing for 40min, and stirring for 50min at the speed of 360r/min to prepare a mixed solution B; ammonia water and absolute ethyl alcohol are mixed according to the mass ratio of 1:35, stirring for 15min at the speed of 60r/min to prepare a mixed solution C; at 50 ℃, mixing the mixed solution B and the mixed solution C according to the mass ratio of 1:1.1, stirring for 3h at 150r/min, centrifugally washing for 5 times at 15000r/min, adding a mixed solution A with the mass 1.2 times that of the mixed solution B, heating to 125 ℃, continuously stirring for 4h, and drying for 8h at 50 ℃ to prepare the near-spherical nano zinc oxide; at 130 ℃, mixing approximately spherical nano zinc oxide and 2- [4 (2-methylpropenyl) phenyl ] propionic acid according to a mass ratio of 1:3, mixing, stirring for 7min at 40r/min, adding cerium sulfate which is 0.2 time of the mass of the near-spherical nano zinc oxide, continuously stirring for 2H, then adding 1- (2-acetyl-3-hydroxyphenoxy) -2,3-epoxypropane which is 1 time of the mass of the near-spherical nano zinc oxide, stirring for 6min at 120r/min, adding H beta zeolite which is 0.2 time of the mass of the near-spherical nano zinc oxide, continuously stirring for 16min, cooling to 80 ℃, adding trialkylaluminum which is 0.2 time of the mass of the near-spherical nano zinc oxide, and stirring for 30min at 60r/min to obtain modified nano zinc oxide;
(2) 4-dodecyl styrene, ammonia water and hydrogen peroxideThe mass ratio is 1:50:8, stirring for 10min at the speed of 50r/min, heating to 60 ℃, and adding Cu-SiO with the mass of 1 time of that of 4-dodecyl styrene 2 Continuously stirring for 9 hours to prepare amino dodecyl styrene; at 85 ℃, mixing azobisisobutyronitrile, aminododecylstyrene and glycidyl methacrylate according to a mass ratio of 1:10:50, stirring for 7min at the speed of 40r/min to prepare a mixed solution D; dropping the mixed solution D into toluene at a rate of 20ml/min, wherein the mass of the toluene is 8 times that of the mixed solution D, keeping the temperature for 3h after dropping, adding methanol at a mass of 5 times that of the mixed solution D, and stirring for 60min at a rate of 70 r/min; filtering to obtain a precipitate A; adding the precipitate A into acetone with the mass 4 times of that of the precipitate A, stirring for 10min at the speed of 60r/min, adding methanol with the mass 4 times of that of the precipitate A, continuously stirring for 30min, filtering, repeating the steps for 4 times, and drying for 3h at the temperature of 40 ℃ and the vacuum degree of 0.01MPa to prepare the viscosity index improver;
(3) Under the conditions of 85 ℃, 0.3MPa and nitrogen protection, the modified nano zinc oxide, the viscosity index improver, the trimethylolethane and the potassium hydroxide are mixed according to the mass ratio of 1:2.2:0.3:8, mixing, stirring for 40min at the speed of 120r/min, adding hydrochloric acid to adjust the pH value to 7.1, then adding magnesium hexasilicate with the mass of 0.5 time that of the modified nano zinc oxide, drying and dehydrating for 8h at the temperature of 40 ℃ and the vacuum degree of 0.01MPa, filtering, adding absolute ethyl alcohol with the mass of 8 times that of the modified nano zinc oxide, stirring for 10min at the speed of 60r/min, then dripping acetic acid with the mass of 0.08 time that of the modified nano zinc oxide, heating to 90 ℃, stirring for 40min at the speed of 40r/min, and drying for 26h at the temperature of 45 ℃ to prepare the self-made additive; mixing a self-made additive and castor oil according to a mass ratio of 1:120, and stirring for 7min at the speed of 40r/min to prepare the degradable long-acting lubricating oil.
Comparative example 1
Comparative example 1 is different from example 2 in the step (1), and only the near-spherical nano zinc oxide and 1- (2-acetyl-3-hydroxyphenoxy) -2,3-propylene oxide are used to prepare modified nano zinc oxide, and the rest of the steps are the same as example 2.
Comparative example 2
Comparative example 2 is different from example 2 in the step (1) of preparing modified nano zinc oxide using only the subsphaeroidal nano zinc oxide and 2- [4 (2-methylpropenyl) phenyl ] propionic acid, and the rest of the steps are the same as example 2.
Comparative example 3
Comparative example 3 is different from example 2 in the step (2) of preparing a viscosity index improver using only aminododecylstyrene, and the rest of the steps are the same as example 2.
Comparative example 4
Comparative example 4 is different from example 2 in the step (2) of preparing a viscosity index improver using only glycidyl methacrylate and the rest of the steps are the same as example 2.
Comparative example 5
The comparative example 5 is different from the example 2 in the step (3), the viscosity index improver is not prepared, the self-made additive is prepared by using only the modified nano zinc oxide, and the rest steps are the same as the example 2.
Comparative example 6
The comparative example 6 is different from the example 2 in the step (3), the modified nano zinc oxide is not prepared, the self-made additive is prepared only by using the viscosity index improver, and the rest steps are the same as the example 2.
Examples of effects
Table 1 below shows the performance analysis results of wear resistance, oxidation resistance, emulsification resistance and high temperature viscometric property of the degradable long-acting lubricating oils prepared by examples 1 to 3 of the present invention and comparative examples 1 to 6.
TABLE 1
From table 1, it can be found that the degradable long-acting lubricating oils prepared in examples 1, 2 and 3 have strong wear resistance, oxidation resistance, emulsification resistance and high-temperature viscosity; from the comparison of experimental data of examples 1, 2 and 3 and comparative example 1, it can be found that the use of 2- [4 (2-methylpropenyl) phenyl ] propionic acid to prepare modified nano zinc oxide can form o-tert-butylphenol, and the prepared degradable long-acting lubricating oil has strong wear resistance and oxidation resistance; from the comparison of experimental data of examples 1, 2 and 3 and comparative example 2, it can be found that the preparation of modified nano zinc oxide by using 1- (2-acetyl-3-hydroxyphenoxy) -2,3-epoxypropane can form o-tert-butylphenol, and the subsequent preparation of self-made additives can form polyether compounds containing hydrophobic structures and hydrophilic structures, so that the prepared degradable long-acting lubricating oil has strong wear resistance, oxidation resistance and emulsification resistance; from the comparison of experimental data of examples 1, 2 and 3 and comparative example 3, it can be found that the viscosity index improver prepared by using glycidyl methacrylate can form a polymethyl methacrylate high molecular polymer, and a polyether compound containing a hydrophobic structure and a hydrophilic structure can be formed by subsequently preparing a self-made additive, so that the prepared degradable long-acting lubricating oil has strong wear resistance, emulsification resistance and high-temperature viscosity; from the comparison of experimental data of examples 1, 2 and 3 and comparative example 4, it can be found that the viscosity index improver prepared by using aminododecylstyrene can form a polymethyl methacrylate high molecular polymer, and the prepared degradable long-acting lubricating oil has strong wear resistance and high-temperature viscosity; from the comparison of the experimental data of examples 1, 2 and 3 and comparative example 5, it can be found that the self-made additive prepared by using the viscosity index improver can form a polyether compound containing a hydrophobic structure and a hydrophilic structure, and the prepared degradable long-acting lubricating oil has stronger wear resistance, emulsification resistance and high-temperature viscosity; from the comparison of experimental data of examples 1, 2 and 3 and comparative example 6, it can be found that polyether compounds containing hydrophobic structures and hydrophilic structures can be formed by using the modified nano zinc oxide to prepare the self-made additive, and the prepared degradable long-acting lubricating oil has strong wear resistance, oxidation resistance and emulsification resistance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The degradable long-acting lubricating oil is characterized by comprising castor oil and a self-made additive.
2. The degradable long-acting lubricating oil of claim 1, wherein the homemade additive is prepared from modified nano zinc oxide and a viscosity index improver.
3. The degradable long-acting lubricating oil of claim 2, wherein the modified nano zinc oxide is prepared from subsphaeroidal nano zinc oxide, 2- [4 (2-methylpropenyl) phenyl ] propionic acid and 1- (2-acetyl-3-hydroxyphenoxy) -2,3-propylene oxide.
4. The degradable long-acting lubricating oil of claim 3, wherein the near-spherical nano zinc oxide is prepared from zinc acetate and sodium oleate.
5. The degradable long-acting lubricating oil of claim 2, wherein the viscosity index improver is prepared from aminododecylstyrene and glycidyl methacrylate.
6. A preparation method of degradable long-acting lubricating oil is characterized by mainly comprising the following preparation steps:
(1) At the temperature of 120 to 130 ℃, adding the subsphaeroidal nano zinc oxide and 2- [4 (2-methylpropenyl) phenyl ] propionic acid according to the mass ratio of 1:2~1:3, mixing, stirring for 5 to 7min at 30 to 40r/min, adding cerium sulfate with the mass of 0.1 to 0.2 time of the subsphaeroidal nano zinc oxide, continuously stirring for 1 to 2h, then adding 1- (2-acetyl-3-hydroxyphenoxy) -2,3-epoxypropane with the mass of 0.8 to 1 time of the subsphaeroidal nano zinc oxide, stirring for 4 to 6min at 80 to 120r/min, adding H beta zeolite with the mass of 0.08 to 0.2 time of the subsphaeroidal nano zinc oxide, continuously stirring for 14 to 1695 min, cooling to 70 to 80 ℃, adding trialkylaluminum with the mass of 0.08 to 0.2 time of the subsphaeroidal nano zinc oxide, and stirring for 20 to 30min at 50 to 60r/min to prepare the modified nano zinc oxide;
(2) At 75 to 85 ℃, mixing azodiisobutyronitrile, aminododecylstyrene and glycidyl methacrylate according to a mass ratio of 1:5:15 to 1:10:50, mixing, and stirring for 5 to 7min at the speed of 30 to 40r/min to prepare a mixed solution D; dripping the mixed solution D into toluene at the speed of 10-20ml/min, wherein the mass of the toluene is 6~8 times that of the mixed solution D, keeping the temperature for 2-3h after dripping, adding methanol at the mass of 3~5 times that of the mixed solution D, and stirring for 50-60min at the speed of 40-70r/min; filtering to obtain a precipitate A; adding the precipitate A into acetone of which the mass is 2~4 times, stirring for 6-10min at 50-60r/min, then adding methanol of which the mass is 2~4 times that of the precipitate A, continuously stirring for 20-30min, filtering, repeating the step 2~4 times, and drying for 2-3h at 30-40 ℃ and the vacuum degree of 0-0.01MPa to prepare the viscosity index improver;
(3) Under the conditions of 75 to 85 ℃, 0.1 to 0.3MPa and nitrogen protection, the modified nano zinc oxide, the viscosity index improver, the trimethylolethane and the potassium hydroxide are mixed according to the mass ratio of 1:1.8:0.2:7~1:2.2:0.3:8, mixing, stirring for 36 to 40min at 80 to 120r/min, adding hydrochloric acid to adjust the pH to 6.9 to 7.1, then adding an adsorbent with the mass of the modified nano zinc oxide being 0.3 to 0.5 times, drying and dehydrating for 7 to 8h at 35 to 40 ℃ and the vacuum degree of 0 to 0.01MPa, filtering, adding absolute ethyl alcohol with the mass of the modified nano zinc oxide being 7~8 times, stirring for 6 to 10min at 50 to 60r/min, then dripping acetic acid with the mass of the modified nano zinc oxide being 0.05 to 0.08 time, heating to 86 to 90 ℃, stirring for 30 to 40min at 20 to 40r/min, and drying for 24 to 26h at 39 to 45 ℃ to prepare the self-made additive; mixing a self-made additive and castor oil according to a mass ratio of 1:80 to 1:120, and stirring for 5 to 7min at the speed of 30 to 40r/min to prepare the degradable long-acting lubricating oil.
7. The method for preparing the degradable long-acting lubricating oil according to claim 6, wherein the method for preparing the near-spherical nano zinc oxide in the step (1) comprises the following steps: mixing sodium oleate and cyclohexanol according to the mass ratio of 1:50 to 1:60, mixing, and stirring for 20 to 50r/min for 20 to 30min to prepare a mixed solution A; zinc acetate and absolute ethyl alcohol are mixed according to the mass ratio of 1:35 to 1:41, mixing, performing ultrasonic dispersion for 20 to 40min, and stirring for 36 to 50min at the speed of 350 to 360r/min to prepare a mixed solution B; ammonia water and absolute ethyl alcohol are mixed according to the mass ratio of 1:25 to 1: mixing 35, and stirring for 7 to 15min at a speed of 50 to 60r/min to prepare a mixed solution C; and (3) mixing the mixed solution B and the mixed solution C according to a mass ratio of 1:0.9 to 1:1.1, stirring for 2 to 3h at 120 to 150r/min, centrifugally washing for 3~5 times at 12000 to 15000r/min, adding the mixed solution A with the mass 1 to 1.2 times of that of the mixed solution B, heating to 115 to 125 ℃, continuously stirring for 3 to 4h, and drying for 7 to 8h at 40 to 50 ℃ to prepare the subsphaeroidal nano zinc oxide.
8. The method for preparing degradable long-acting lubricating oil according to claim 6, wherein the method for preparing aminododecylstyrene in step (2) comprises: mixing 4-dodecyl styrene, ammonia water and hydrogen peroxide according to a mass ratio of 1:30:6~1:50:8, stirring for 9 to 10min at the speed of 20 to 50r/min, heating to 40 to 60 ℃, adding a catalyst with the mass of 0.8 to 1 time of that of 4-dodecylstyrene, and continuously stirring for 3 to 9 hours to prepare the aminododecylstyrene.
9. The method for preparing the degradable long-acting lubricating oil according to claim 8, wherein the catalyst is Cu-SiO 2 。
10. The method of claim 6, wherein the adsorbent in step (3) is magnesium hexasilicate.
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