阅读说明：本技术 一种石墨烯改性的纳米氧化物复合材料机油添加剂 (Graphene modified nano oxide composite material engine oil additive ) 是由 邓满姣 陶和平 袁凯杰 张谦 方铿春 于 2019-01-10 设计创作，主要内容包括：本发明公开了一种石墨烯改性的纳米氧化物复合材料机油添加剂,其包括纳米氧化物复合材料、分散剂、锂基脂和基础油。本发明利用石墨烯对纳米氧化物复合材料进行改性,然后将改性后的纳米氧化物复合材料应用于机油添加剂中,从而提高了机油高温润滑性能。本发明中的纳米氧化物为层状钙钛矿材料,其具有更好的耐高温性能和高温润滑性。层状钙钛矿材料能有效提高机油的极压性能和各工况下的抗磨减磨性能,也可显著减轻高温下摩擦表面的磨损,从而延长机油添加剂的服役寿命。本发明中的石墨烯具有高导热特性。这样将层状钙钛矿材料与石墨烯结合制备的机油添加剂可以降低机油温度并延长机油使用寿命。(The invention discloses a graphene modified nano-oxide composite engine oil additive which comprises a nano-oxide composite, a dispersing agent, lithium-based grease and base oil. According to the invention, the nano-oxide composite material is modified by using graphene, and then the modified nano-oxide composite material is applied to the engine oil additive, so that the high-temperature lubricating property of the engine oil is improved. The nano oxide in the invention is a layered perovskite material, and has better high temperature resistance and high temperature lubricity. The layered perovskite material can effectively improve the extreme pressure performance and the wear resistance and wear reduction performance of the engine oil under various working conditions, and can also obviously reduce the wear of the friction surface at high temperature, thereby prolonging the service life of the engine oil additive. The graphene in the invention has high heat conduction characteristic. The engine oil additive prepared by combining the layered perovskite material and the graphene can reduce the temperature of the engine oil and prolong the service life of the engine oil.)

1. A graphene modified nano oxide composite material engine oil additive is characterized in that,

using the graphene-coated lamellar nano-oxide composite material in the engine oil additive;

the engine oil additive is prepared by fully stirring the graphene-modified nano oxide composite material, the dispersing agent, the lithium-based grease and the base oil according to the mass ratio of (0.5-3) to (1.5-7) to (10-18) to (80-90).

2. The graphene-modified nano-oxide composite engine oil additive as claimed in claim 1, wherein the preparation method of the nano-oxide composite comprises the following steps:

preparing a perovskite structure material precursor;

obtaining nano perovskite dispersion liquid with the concentration of 7.5mg/m L through the perovskite structure material precursor;

mixing graphene dispersion liquid with the concentration of 0.05mg/m L with the nano perovskite dispersion liquid according to 0.1-5 vol% to obtain mixed liquid, and then carrying out vacuum drying on the mixed liquid to obtain the graphene modified nano oxide composite material.

3. The graphene-modified nano-oxide composite engine oil additive as claimed in claim 2, wherein a perovskite structure material precursor is prepared by a high-temperature solid phase method.

4. The graphene-modified nano-oxide composite engine oil additive as claimed in claim 2, wherein the perovskite structure material precursor is treated by liquid phase ion displacement and wet ball milling to obtain a nano-perovskite dispersion.

5. The graphene-modified nano-oxide composite engine oil additive according to claim 1, wherein the nano-oxide composite is a perovskite composite coated with graphene.

6. The graphene-modified nano-oxide composite engine oil additive of claim 5, wherein the perovskite composite is in a layered structure.

7. The graphene-modified nano-oxide composite engine oil additive of claim 1, wherein the nano-oxide composite is HTiNbO₅@Graphene、HTi₂NbO₇@Graphene、HTi₅NbO₁₄@Graphene、HNb₃O₈@Graphene、HCa₂Nb₃-yTayO₁₀@Graphene、HLnNb₂O₇@Graphene、HTaWO₆@Graphene、HCa₂-xSrxNb₃O₁₀At least one of @ Graphene.

8. The graphene-modified nano-oxide composite engine oil additive according to claim 1, wherein the dispersant is at least one of sodium dodecyl benzene sulfonate, stearic acid, fatty glyceride and a silicon-containing surfactant.

9. The graphene-modified nano-oxide composite machine oil additive according to claim 1, wherein the base oil is at least one of mineral oil, synthetic oil, and vegetable base oil.

10. The graphene-modified nano-oxide composite engine oil additive according to claim 1, wherein the graphene dispersion liquid and the nano perovskite dispersion liquid are mixed by means of stirring.

Technical Field

The invention relates to the field of engine oil additives, in particular to a graphene modified nano oxide composite engine oil additive.

Background

In recent years, the number of automobiles has increased dramatically. Especially in large and medium cities in China, along with the increasingly serious air pollution caused by motor vehicle exhaust in cities, the destructiveness of the automobile exhaust to the environment is more and more remarkable. Therefore, it is required to reduce the emission of exhaust gas of automobiles as much as possible while enjoying the convenience of automobiles. The engine is the heart of the automobile, and only qualified engine oil can reduce the abrasion of engine parts and prolong the service life.

Engine oil, i.e. engine lubricating oil. The engine oil can play roles in lubrication, wear reduction, auxiliary cooling, sealing, leakage prevention, rust prevention, corrosion prevention, shock absorption, buffering and the like for the engine. The engine oil consists of base oil and additive. The machine oil on the market can be simply divided into mineral oil and synthetic oil (vegetable oil is not used because the yield is rare) because of different base oils. The synthetic oil is divided into: total synthesis and semi-synthesis. The lubricating base oil mainly comprises mineral base oil and synthetic base oil. Mineral base oils are widely used in large quantities (above about 95%), but in some applications products formulated with synthetic base oils must be used. The existing engine oil in the market has the problems of high temperature, reduced high-temperature lubricity and large exhaust emission.

Disclosure of Invention

The invention aims to provide a graphene modified nano oxide composite material engine oil additive to solve the problems of high temperature, reduced high-temperature lubricity and large exhaust emission of the existing engine oil.

In order to achieve the purpose, the invention provides the following technical scheme: a graphene modified nano oxide composite engine oil additive is provided, wherein,

using the graphene-coated lamellar nano-oxide composite material in the engine oil additive;

the engine oil additive is prepared by fully stirring the graphene-modified nano oxide composite material, the dispersing agent, the lithium-based grease and the base oil according to the mass ratio of (0.5-3) to (1.5-7) to (10-18) to (80-90).

As a further improvement of the above aspect, the method for preparing the nano-oxide composite material includes the steps of:

preparing a perovskite structure material precursor;

obtaining nano perovskite dispersion liquid with the concentration of 7.5mg/m L through the perovskite structure material precursor;

mixing graphene dispersion liquid with the concentration of 0.05mg/m L with the nano perovskite dispersion liquid according to 0.1-5 vol% to obtain mixed liquid, and then carrying out vacuum drying on the mixed liquid to obtain the graphene modified nano oxide composite material.

Further, a perovskite structure material precursor is prepared by a high-temperature solid phase method.

Further, the perovskite structure material precursor is treated by liquid phase ion replacement and wet ball milling to obtain the nano perovskite dispersion liquid.

As a further improvement of the above scheme, the nano-oxide composite material is a perovskite composite material coated with graphene.

Further, the perovskite composite material has a layered structure.

As a further improvement of the scheme, the nano-oxide composite material is HTiNbO₅@Graphene、HTi₂NbO₇@Graphene、HTi₅NbO₁₄@Graphene、HNb₃O₈@Graphene、HCa₂Nb₃-yTayO₁₀@Graphene、HLnNb₂O₇@Graphene、HTaWO₆@Graphene、HCa₂-xSrxNb₃O₁₀At least one of @ Graphene.

As a further improvement of the scheme, the dispersant is at least one of sodium dodecyl benzene sulfonate, stearic acid, fatty glyceride and silicon-containing surfactant.

As a further improvement of the above aspect, the base oil is at least one of a mineral oil, a synthetic oil, and a vegetable base oil.

As a further improvement of the above scheme, the graphene dispersion liquid and the nano perovskite dispersion liquid are mixed by stirring.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the nano-oxide composite material is modified by using graphene, and then the modified nano-oxide composite material is applied to the engine oil additive, so that the high-temperature lubricating property of the engine oil additive is improved. The nano oxide in the invention is a layered perovskite material, and has better high temperature resistance and high temperature lubricity. The layered perovskite material can effectively improve the extreme pressure performance and the wear resistance and wear reduction performance of the engine oil additive under various working conditions, and can also obviously reduce the wear of the friction surface at high temperature, thereby prolonging the service life of the engine oil additive. The graphene in the invention has high heat conduction characteristic. Therefore, the engine oil additive prepared by combining the layered perovskite material and the graphene can reduce the temperature of the engine oil and prolong the service life of the engine oil on one hand, and can ensure the high-temperature lubricating property of the engine oil and reduce the emission of high-temperature pollution source gas on the other hand.

Drawings

FIG. 1 is a flow chart of a method for preparing a nano-oxide composite material.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, 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.