CN109233948B - Hydrotalcite-like lubricating oil repairing agent and preparation method thereof - Google Patents
Hydrotalcite-like lubricating oil repairing agent and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/14—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/066—Arylene diamines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/0405—Siloxanes with specific structure used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/252—Diesel engines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
Abstract
The invention relates to a layered double hydroxide lubricating oil repairing agent, which specifically comprises the following components in percentage by weight: 3-25% of layered double hydroxide with the surface modified by a silane coupling agent, 1-5% of antirust agent, 0.5-3% of antioxidant and the balance of base oil. The invention also provides a preparation method of the layered double hydroxide lubricating oil repairing agent. The layered double hydroxide lubricating oil repairing agent provided by the invention has extremely excellent abrasion resistance, and is widely applied to automobiles of gasoline engines and diesel engines.
Description
Technical Field
The invention relates to a lubricating oil friction wear self-repairing additive, in particular to a high-performance layered double hydroxide lubricating oil repairing agent and a preparation method thereof.
Background
Energy conservation and environmental pollution reduction are the common concerns of the world, and the energy conservation of automobiles is particularly important as important consumer goods for energy consumption. Approximately 20-30% of the energy generated by the combustion of engine fuel is wasted in the form of friction. Therefore, reducing wear, reducing energy consumption, and greatly extending the service life of equipment are becoming the focus of great attention. Layered double hydroxides have become the focus of recent research due to their unique layered structure, tunable nature of the lamina elements, and exchangeability of the interlayer anions.
Layered Double Hydroxides (LDHs), also known as hydrotalcite-like compounds, are Layered Double Hydroxides having a Layered structureFunctional material with chemical formula [ M2+ 1-xM3+ x (OH)2]x+An- x/n mH2And O. The main body laminate has brucite Mg (OH)2Regular octahedral structure, which can be regarded as brucite-like [ M ]2+(OH)2]M in a layer2+Partial quilt M3+Substitution, resulting in the accumulation of positive charges on the laminae, these positive charges being held by exchangeable A's located between the layersn-And neutralizing to make the whole hydrotalcite-Like (LDHs) layered material be electrically neutral. Layered double metal hydroxide (LDHs) interlayer anions have interchangeability, and meanwhile, hydrotalcite-like compound (LDHs) is heat-resistant, radiation-resistant and acid-alkali-resistant, so that the layered double metal hydroxide (LDHs) interlayer anions have wide application in the aspects of ion exchange, adsorption, catalysis, functional assistant and the like.
The Layered Double Hydroxides (LDHs) slide easily between the sheets and may spread along the metal surface at worn furrows. Meanwhile, a plurality of active groups exist between the laminates, and can react on the fresh metal surface generated by friction, so that a metal abrasion self-repairing film is generated on the surface of the metal friction pair. At present, the layered double hydroxide is not reported in documents as a lubricating grease repairing agent, and the friction wear self-repairing agent prepared from the layered double hydroxide has excellent hydrotalcite-like characteristics and more excellent wear resistance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a layered double hydroxide lubricating oil repairing agent with excellent wear resistance.
Specifically, the layered double hydroxide lubricating oil repairing agent provided by the invention comprises the following components in percentage by weight:
compared with the prior art that the silane coupling agent and the layered double hydroxide are independently used and directly dispersed into the base oil, the invention creatively discovers that the silane coupling agent and the layered double hydroxide are reacted in advance, namely the surface of the layered double hydroxide is modified by the silane coupling agent, the wear resistance of the obtained lubricating oil repairing agent product can be further improved, and the layered double hydroxide with the surface modified by the silane coupling agent can better exert a synergistic effect with the antioxidant, so that the comprehensive performance of the lubricating oil repairing agent product is improved.
Specifically, the layered double hydroxide modified by the silane coupling agent in the invention is prepared by the method comprising the following steps: dissolving the layered double hydroxide in ethanol to form a uniform dispersion liquid; and slowly adding an ethanol solution containing a silane coupling agent into the dispersion liquid while stirring, fully reacting, and washing a reaction product to obtain the silane coupling agent.
In order to ensure uniform dispersion of the dispersion, the layered double hydroxide may be subjected to ultrasonic treatment after being dissolved in ethanol. In order to fully modify the surface, the dosage ratio of the layered double metal hydroxide to the silane coupling agent is 1: 1-5. After the full reaction, in order to remove the excess silane coupling agent, the obtained reaction product can be washed with absolute ethyl alcohol for 2-4 times, and then washed with distilled water for 2-4 times.
The layered double hydroxide adopted by the invention is preferably zinc-aluminum hydrotalcite with the surface modified by a silane coupling agent and dodecyl sulfonate groups between layers, magnesium-aluminum hydrotalcite with the surface modified by a silane coupling agent and dodecyl sulfonate groups between layers or nickel-aluminum hydrotalcite with the surface modified by a silane coupling agent and dodecyl sulfonate groups between layers. The surface of the layered bimetallic hydroxide of the present invention is preferably modified with the following silane coupling agents: 3-aminopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane or a mixture thereof.
The antioxidant is added, so that the antioxidant performance of the lubricating oil can be obviously improved, the oil change period is prolonged, and an engine is protected. The antioxidant is one or a mixture of alkylphenol type antioxidant and nitrogenous antioxidant. In order to further improve the comprehensive performance of the repairing agent, the antioxidant is preferably one of 2, 6-di-tert-butyl-p-cresol, a-naphthylamine and N, N-di-sec-butyl-p-phenylenediamine, or a mixture of 2, 6-di-tert-butyl-p-cresol and a-naphthylamine, or a mixture of 2, 6-di-tert-butyl-p-cresol and N, N-di-sec-butyl-p-phenylenediamine. According to the invention, a great deal of practice shows that the preferable specific antioxidant is matched with the layered double hydroxide with the surface modified by the silane coupling agent, so that the comprehensive use performances such as the abrasion resistance and the like of the repairing agent product can be further improved while the oxidation resistance is improved, and the effect is obviously superior to that of other common antioxidants.
The antirust agent can be one of sodium carboxylate and sodium sulfonate or a mixture thereof.
The base oil of the invention can be one or a mixture of silicone oil, synthetic hydrocarbon oil or PAO oil.
As a preferable scheme of the invention, the layered double hydroxide lubricating oil repairing agent adopts nickel-aluminum hydrotalcite with the surface modified by a silane coupling agent and the interlayer of dodecyl sulfonate, and comprises the following components in percentage by weight:
surface modified by 3-glycidyloxypropyltrimethoxysilane
Preferably, the composition comprises the following components in percentage by weight:
surface modified by 3-glycidyloxypropyltrimethoxysilane
As a preferable scheme of the invention, the layered double hydroxide lubricating oil repairing agent adopts zinc-aluminum type hydrotalcite with the surface modified by a silane coupling agent and the interlayer of dodecyl sulfonate, and comprises the following components in percentage by weight:
surface modified with 3-aminopropyltrimethoxysilane and interlaminar
Preferably, the composition comprises the following components in percentage by weight:
surface modified with 3-aminopropyltrimethoxysilane and interlaminar
As a preferable scheme of the invention, the layered double hydroxide lubricating oil repairing agent adopts magnesium-aluminum hydrotalcite with the surface modified by a silane coupling agent and the interlayer of dodecyl sulfonate, and comprises the following components in percentage by weight:
surface modified with 3-aminopropyltrimethoxysilane and layer
Preferably, the composition comprises the following components in percentage by weight:
surface modified with 3-aminopropyltrimethoxysilane and layer
The invention further provides a preparation method of the layered double hydroxide lubricating oil repairing agent, which comprises the following steps:
(1) adding the layered double hydroxide with the surface modified by the silane coupling agent into base oil at the temperature of 60-80 ℃, adding an antioxidant, fully stirring, and keeping the temperature for 10-30 minutes to obtain a mixture;
(2) and heating the mixture to 120-130 ℃, adding an antirust agent, and keeping the temperature for 5-20 minutes to obtain the antirust agent.
The invention can ensure that the repairing agent has uniform texture, stable property and good use effect by strictly controlling the adding sequence of the raw materials and the temperature of each step in the preparation process.
The layered double hydroxide lubricating oil repairing agent provided by the invention has the following advantages:
(1) the lubricating oil for vehicles has good solubility: the particle size of the layered double hydroxide is nano-scale, and particularly, the layered double hydroxide is modified on the surface of a laminate by a silane coupling agent, so that the surface tension of the layered double hydroxide is greatly reduced, the agglomeration among nano particles is reduced to the maximum extent, and the surface polarity of the substance is increased, so that the friction agent can be uniformly dispersed in base oil and has good solubility with vehicle lubricating oil.
(2) Has extremely excellent abrasion resistance: a commercially available API CF-415W-40 diesel engine oil was selected as a test oil, and an anti-wear and anti-wear performance test was conducted by adding 5.0% of an organomolybdenum friction modifier (POUPC 1001) and a layered double hydroxide (Mg-Al type) friction modifier, respectively, and the test results are shown in Table 1. As can be seen from Table 1, the oil film broke after 43min for the API CF-415W-40 diesel engine oil without the addition of the friction modifier under 40kgf, but both the addition of the organomolybdenum friction modifier and the layered double hydroxide lubricant oil reconditioner had good antiwear properties. The wear resistance of the magnesium-aluminum type layered double hydroxide is superior to that of the organic molybdenum friction modifier in terms of friction force, friction coefficient and grinding diameter. Therefore, the layered double hydroxide lubricating oil repairing agent has extremely excellent wear resistance.
Table 1: wear resistance of different friction modifiers
(3) The composition is compounded with the lubricating oil for vehicles, and is convenient to use: the layered double-metal hydroxide lubricating oil repairing agent is compounded with the automotive lubricating oil, is directly added into a gasoline engine and a diesel engine, and has simple operation and convenient use.
(4) The antioxidant is compounded with the vehicle lubricating oil to improve the antioxidant performance of oil products: the oxidation induction period of the commercially available SN/GF-55W-30 lubricating oil is 70-80min (SH/T0790), and the oxidation induction period of the compounded lubricating oil is more than 100min (SH/T0790), so that the layered double hydroxide lubricating oil repairing agent has extremely excellent oxidation resistance.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The embodiment provides a layered double metal hydroxide (nickel aluminum) lubricant repairing agent, which specifically comprises the following components:
surface modified with 3-glycidyloxypropyltrimethoxysilane
Wherein the nickel aluminum hydrotalcite with the surface modified by 3-glycidoxy propyl trimethoxy silane and the interlayer of dodecyl sulfonate is prepared by the following method: dissolving 100mg of nickel-aluminum hydrotalcite with dodecyl sulfonate groups between layers in 50-100 mL of ethanol, and performing ultrasonic treatment for 30min to form a uniform dispersion liquid; 10mL of ethanol containing 0.3g of 3-glycidyloxypropyltrimethoxysilane was slowly added under stirring, the reaction was continued for 24 hours after the addition was completed, and the resulting paste product was washed with anhydrous ethanol 2 to 4 times to remove excess 3-glycidyloxypropyltrimethoxysilane, and then washed with distilled water 2 to 4 times. The obtained layered double hydroxide (nickel aluminum) with the surface modified by the silane coupling agent is obtained.
The embodiment further provides a preparation method of the lubricating oil repairing agent, which specifically comprises the following steps:
(1) adding nickel aluminum hydrotalcite with the surface modified by 3-glycidyl ether oxypropyl trimethoxy silane and the interlayer of dodecyl sulfonate into silicone oil and PAO oil at the temperature of 80 ℃, adding 2, 6-di-tert-butyl-p-cresol, fully stirring and keeping the temperature for 20 minutes to obtain a mixture;
(2) and heating the mixture to 130 ℃, adding sodium carboxylate, and keeping the temperature for 10 minutes to obtain the sodium carboxylate.
The nickel aluminum type layered double hydroxide lubricant repairing agent provided in this example was analyzed, and the analysis results are shown in table 2, and it can be seen from the analysis results that the product meets the index requirements.
Table 2: analysis result of Nickel-aluminum type Friction modifier
Example 2
The embodiment provides a layered double metal hydroxide (zinc-aluminum) lubricant repairing agent, which specifically comprises the following components:
surface modified with 3-aminopropyltrimethoxysilane and interlaminar
The zinc-aluminum type hydrotalcite with the surface modified by 3-aminopropyltrimethoxysilane and the interlayer modified by dodecyl sulfonate is prepared by the following method: dissolving 100mg of zinc-aluminum type hydrotalcite with dodecyl sulfonate groups between layers in 50-100 mL of ethanol, and performing ultrasonic treatment for 30min to form a uniform dispersion liquid; 10mL of ethanol containing 0.3g of 3-aminopropyltrimethoxysilane was slowly added under stirring, the reaction was continued for 24 hours after the addition was completed, and the resulting paste product was washed with anhydrous ethanol 2 to 4 times to remove excess 3-aminopropyltrimethoxysilane, and then washed with distilled water 2 to 4 times. The obtained layered double-metal hydroxide (zinc-aluminum) with the surface modified by silane coupling agent is obtained.
The embodiment further provides a preparation method of the lubricating oil repairing agent, which specifically comprises the following steps:
(1) adding zinc-aluminum type hydrotalcite with the surface modified by 3-aminopropyltrimethoxysilane and the interlayer of dodecyl sulfonate into PAO oil at the temperature of 80 ℃, adding N, N-di-sec-butyl-p-phenylenediamine, fully stirring and keeping the temperature for 20 minutes to obtain a mixture;
(2) and heating the mixture to 130 ℃, adding sodium sulfonate, and keeping the temperature for 10 minutes to obtain the sodium sulfonate-containing aqueous solution.
The zinc aluminum type layered double hydroxide lubricant repairing agent provided by the embodiment is analyzed, the analysis result is shown in table 3, and it can be seen from the analysis result that the prepared zinc aluminum type friction modifier meets the index requirement.
Table 3: analysis result of Zinc-aluminum type Friction modifier
Example 3
The embodiment provides a layered double metal hydroxide (magnesium aluminum) lubricant repairing agent, which specifically comprises the following components:
surface modified with 3-aminopropyltrimethoxysilane and layer
The magnesium-aluminum hydrotalcite with the surface modified by 3-aminopropyltrimethoxysilane and the interlayer modified by dodecyl sulfonate is prepared by the following method: dissolving 100mg of magnesium-aluminum type hydrotalcite with dodecyl sulfonate groups between layers in 50-100 mL of ethanol, and performing ultrasonic treatment for 30min to form a uniform dispersion liquid; 10mL of ethanol containing 0.3g of 3-aminopropyltrimethoxysilane was slowly added under stirring, the reaction was continued for 24 hours after the addition was completed, and the resulting paste product was washed with anhydrous ethanol 2 to 4 times to remove excess 3-aminopropyltrimethoxysilane, and then washed with distilled water 2 to 4 times. The obtained layered bimetal hydroxide (magnesium aluminum) with the surface modified by silane coupling agent.
The embodiment further provides a preparation method of the lubricating oil repairing agent, which specifically comprises the following steps:
(1) adding magnesium-aluminum hydrotalcite with the surface modified by 3-aminopropyltrimethoxysilane and the interlayer of dodecyl sulfonate into PAO oil at the temperature of 80 ℃, adding alpha-naphthylamine and 2, 6-di-tert-butyl-p-cresol, fully stirring and keeping the temperature constant for 20 minutes to obtain a mixture;
(2) and heating the mixture to 130 ℃, adding sodium sulfonate, and keeping the temperature for 10 minutes to obtain the sodium sulfonate-containing aqueous solution.
The magnesium-aluminum layered double hydroxide lubricant repairing agent provided by the embodiment is analyzed, the analysis result is shown in table 4, and it can be seen from the analysis result that the prepared magnesium-aluminum layered double hydroxide lubricant repairing agent meets the index requirement.
Table 4: analysis results of magnesium-aluminum type friction modifier
Experimental example 1
A magnesium-aluminum type lubricant repairing agent is prepared according to example 3, and is compounded with SM 10W-30 gasoline engine oil to be directly used for a Benz 300C series car, so that the applicability of the magnesium-aluminum type lubricant repairing agent is examined. The oil change period of the above experiment was 2 km, and the oil product was analyzed after the end of the experiment, and the results are shown in table 5.
Table 5: different metal contents of engine oil
The content of the element of the engine oil reflects the abrasion condition of each friction pair in the engine, particularly the content of the element Fe in the engine oil represents the abrasion condition of the engine in the running test process, and the excessive abrasion can cause blow-by, increased oil consumption, noise and power loss. As can be seen from Table 5, after the Mg-Al lubricant repairing agent is compounded with the SM 10W-30 gasoline engine oil, the content of Fe element in the engine oil is directly reduced from 130mg/kg to 50mg/kg, the content of Cu element is directly reduced from 65mg/kg to 37mg/kg, and the content of Al element is directly reduced from 60mg/kg to 29mg/kg, thereby indicating that the Mg-Al lubricant repairing agent has extremely excellent wear resistance.
Experimental example 2
The zinc-aluminum type lubricant repairing agent is prepared according to the example 2, and is compounded with the SL 5W-30 gasoline engine oil to be directly used for the great wall Harvard series cars, and the applicability of the aluminum type lubricant repairing agent is examined. The original oil change mileage of SL 5W-30 is 7000km, after the zinc-aluminum type lubricating oil repairing agent is added, the oil change period of the experiment is changed to 2 kilometers, the oil product is analyzed after the experiment is finished, and the result is shown in Table 6.
Table 6: analysis result of engine oil
The oil change mileage of the Changcheng Hafei series car adopting SL 5W-30 is 7000km, and each index meets the standard requirement. However, after the zinc-aluminum type lubricating oil repairing agent is added, the oil change mileage is changed into 20000km, and each index meets the standard requirement. Compared with 7000km indexes, 20000km indexes are all in the standard range although being increased. After the repairing agent is added, the oil change mileage is changed to 3 times of the original mileage. Therefore, the magnalium lubricating oil repairing agent has extremely excellent abrasion resistance and oxidation resistance.
The above description is only for the purpose of illustrating preferred embodiments of the present invention and is not intended to limit the scope of the present invention, so that variations of the features of the raw materials, the steps, the formula and the like, which are equivalent to the scope of the present invention, are included in the claims of the present invention.
Claims (8)
1. The layered double-metal hydroxide lubricating oil repairing agent is characterized by comprising the following components in percentage by weight:
3-25% of layered double hydroxide with the surface modified by a silane coupling agent;
1-5% of an antirust agent;
0.5-3% of an antioxidant;
the balance of base oil;
the layered double hydroxide with the surface modified by the silane coupling agent is prepared by the method comprising the following steps: dissolving the layered double hydroxide in ethanol to form a uniform dispersion liquid; slowly adding an ethanol solution containing a silane coupling agent into the dispersion liquid while stirring, fully reacting, and washing a reaction product to obtain the product;
the layered double hydroxide with the surface modified by the silane coupling agent is zinc-aluminum hydrotalcite with the surface modified by the silane coupling agent and the interlayer of dodecyl sulfonate or nickel-aluminum hydrotalcite with the surface modified by the silane coupling agent and the interlayer of dodecyl sulfonate;
the surface of the layered double hydroxide is modified by the following silane coupling agent: 3-aminopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane or a mixture thereof;
the antioxidant is one or two of a-naphthylamine, 2, 6-di-tert-butyl-p-cresol and N, N-di-sec-butyl-p-phenylenediamine.
2. The layered double hydroxide lubricating oil repairing agent according to claim l, wherein the usage ratio of the layered double hydroxide to the silane coupling agent is 1: 1-5.
3. The layered double hydroxide lubricant repairing agent according to claim 1, wherein the rust inhibitor is one or a mixture of sodium carboxylate and sodium sulfonate;
and/or the base oil is one or a mixture of silicone oil, synthetic hydrocarbon oil or PAO oil.
4. The layered double hydroxide lubricant oil repairing agent according to claim 1, which is characterized by comprising the following components in percentage by weight:
3-25% of nickel-aluminum hydrotalcite with the surface modified by 3-glycidyl ether oxypropyl trimethoxy silane and the interlayer modified by dodecyl sulfonate;
1-5% of sodium carboxylate;
0.5-3% of 2, 6-di-tert-butyl-p-cresol;
the balance of the mixture of silicone oil and PAO oil.
5. The layered double hydroxide lubricant oil repairing agent according to claim 4, which is characterized by comprising the following components in percentage by weight:
3-10% of nickel-aluminum hydrotalcite with the surface modified by 3-glycidyl ether oxypropyl trimethoxy silane and the interlayer modified by dodecyl sulfonate;
1-3% of sodium carboxylate;
0.5-1.5% of 2, 6-di-tert-butyl-p-cresol;
the balance of the mixture of silicone oil and PAO oil.
6. The layered double hydroxide lubricant oil repairing agent according to claim 1, which is characterized by comprising the following components in percentage by weight:
3-25% of zinc-aluminum hydrotalcite with the surface modified by 3-aminopropyltrimethoxysilane and the interlayer of dodecyl sulfonate;
1-5% of sodium sulfonate;
0.5-3% of N, N-di-sec-butyl p-phenylenediamine;
the balance of PAO oil.
7. The layered double hydroxide lubricant oil repairing agent according to claim 6, which is characterized by comprising the following components in percentage by weight:
20-25% of zinc-aluminum hydrotalcite with the surface modified by 3-aminopropyltrimethoxysilane and the interlayer of dodecyl sulfonate;
1-3% of sodium sulfonate;
0.5-1.5% of N, N-di-sec-butyl p-phenylenediamine;
the balance of PAO oil.
8. The method for preparing the layered double hydroxide lubricant repairing agent according to any one of claims 1 to 7, which is characterized by comprising the following steps:
(1) adding the layered double hydroxide with the surface modified by the silane coupling agent into base oil at the temperature of 60-80 ℃, adding an antioxidant, fully stirring, and keeping the temperature for 10-30 minutes to obtain a mixture;
(2) and heating the mixture to 120-130 ℃, adding an antirust agent, and keeping the temperature for 5-20 minutes to obtain the antirust agent.
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| CN104160004A (en) * | 2012-01-23 | 2014-11-19 | 丰田自动车株式会社 | Oil additive and oil filter |
| CN104342269A (en) * | 2013-07-26 | 2015-02-11 | 中国石油化工股份有限公司 | Layered double metal hydroxide lubricating grease and preparation method thereof |
| CN104893786A (en) * | 2015-05-28 | 2015-09-09 | 清华大学 | Preparation method and application method of hydrotalcite nano-additive |
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| CN104160004A (en) * | 2012-01-23 | 2014-11-19 | 丰田自动车株式会社 | Oil additive and oil filter |
| CN104342269A (en) * | 2013-07-26 | 2015-02-11 | 中国石油化工股份有限公司 | Layered double metal hydroxide lubricating grease and preparation method thereof |
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