CN114806680A - Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil - Google Patents
Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil Download PDFInfo
- Publication number
- CN114806680A CN114806680A CN202210233517.XA CN202210233517A CN114806680A CN 114806680 A CN114806680 A CN 114806680A CN 202210233517 A CN202210233517 A CN 202210233517A CN 114806680 A CN114806680 A CN 114806680A
- Authority
- CN
- China
- Prior art keywords
- ionic liquid
- oil
- lubricating
- hmim
- binary system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
-
- 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
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/401—Fatty vegetable or animal oils used as base material
-
- 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
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
-
- 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
-
- 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
- C10N2030/08—Resistance to extreme temperature
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention discloses an ionic liquid and nano particle binary system additive for enhancing the lubricating effect of vegetable oil, which comprises base oil, wherein [ HMIm ] is uniformly dispersed in the base oil]PF 6 Ionic liquid and Al 2 O 3 Nanoparticles. Al in the invention 2 O 3 The nano particles have good physical and chemical properties, can be used as additives to be dispersed in lubricating oil to improve the anti-wear and bearing capacity of the lubricating oil, and in addition, the [ HMIm]PF 6 The ionic liquid has high thermal stability, high chemical inertia and low saturated vapor pressure, can be used as a lubricating oil additive to improve the lubricating effect of lubricating oil, and adopts [ HMim]PF 6 Ionic liquid for Al in lubricating oil 2 O 3 The surface of the nano particles is modified, so that the nano particles are stably dispersed in the lubricantIn the lubricating oil, the lubricating effect of the base oil is improved through a lubricating enhancement mechanism under the synergistic effect between the ionic liquid and the nano particles.
Description
Technical Field
The invention relates to the technical field of lubricating oil additives, in particular to an ionic liquid and nanoparticle binary system additive for enhancing the lubricating effect of vegetable oil.
Background
At present, most of lubricating oils used in industrial fields such as manufacturing and automobiles are petroleum-based lubricating oils, and improper use thereof causes environmental problems such as air, water, soil pollution, and the like. Meanwhile, along with the development of economic society, the demand of people for lubricating oil is increasing day by day. Therefore, in order to solve the contradiction between the increasing demand for lubricating oils and environmental protection, development of new environmentally friendly lubricating oils is being sought to gradually replace petroleum-based lubricating oils.
The synthetic ester-based lubricating oil and the vegetable oil-based lubricating oil have good biodegradation and lubricating properties and low toxicity, and are two types of potential environment-friendly lubricating oil. As with the traditional lubricating oil base liquid, the synthetic ester and the vegetable oil also need to be matched with the additive for use, so as to improve the antifriction, antiwear and bearing capacity of the environment-friendly lubricating oil. Inorganic nano particles and ionic liquid are two novel environment-friendly lubricating oil additives, can adapt to harsh working environments such as high temperature, high vacuum and the like, have small environmental pollution, seek to develop environment-friendly lubricating oil with wide application range and small environmental pollution, and become research targets in the friction industry and the lubrication industry. People can use synthetic ester and vegetable oil as the base oil of the environment-friendly lubricating oil, and use inorganic nano particles and ionic liquid as the additive of the environment-friendly lubricating oil.
However, in the prior art, the ionic liquid or the inorganic nanoparticles are generally used as a single lubricating oil additive, and the performance of the lubricating oil cannot be improved by well utilizing the matching of the ionic liquid and the inorganic nanoparticles, so that the lubricating effect of the lubricating oil is low, and therefore, the ionic liquid and nanoparticle binary system additive for enhancing the lubricating effect of the vegetable oil is needed.
Disclosure of Invention
The invention provides an ionic liquid and nano particle binary system additive for enhancing the lubricating effect of vegetable oil, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
the ionic liquid and nanoparticle binary system additive for enhancing the lubricating effect of vegetable oil comprises base oil, wherein [ HMIm ] is uniformly dispersed in the base oil]PF 6 Ionic liquid and Al 2 O 3 Nanoparticles.
As a further improvement scheme of the technical scheme: the base oil is vegetable oil-based or synthetic ester-based lubricating oil.
As a further improvement scheme of the technical scheme: the base oil is sunflower seed oil.
As a further improvement scheme of the technical scheme: homogeneously dispersed 0.2 wt.% in the base oil [ HMIm]PF 6 Ionic liquid and 0.1 wt.% Al 2 O 3 Nanoparticles.
As a further improvement scheme of the technical scheme: homogeneously dispersed 0.8 wt.% in the base oil [ HMIm]PF 6 Ionic liquid and 0.1 wt.% Al 2 O 3 Nanoparticles.
As a further improvement scheme of the technical scheme: homogeneously dispersed 0.2 wt.% in the base oil [ HMIm]PF 6 Ionic liquid and 0.4 wt.% Al 2 O 3 Nanoparticles.
As a further improvement scheme of the technical scheme: homogeneously dispersed 0.8 wt.% in the base oil [ HMIm]PF 6 Ionic liquid and 0.4 wt.% Al 2 O 3 Nanoparticles.
The ionic liquid, nanoparticle binary system additive for enhancing the lubricating effect of vegetable oil as described in any one of the above, for use as a metal working lubricant or as a machine lubricant.
Compared with the prior art, the invention has the beneficial effects that:
compared with the prior art, the novel point and the innovation point of the invention are creative through [ HMIm]PF 6 Ionic liquid and Al 2 O 3 The nano particles adopt [ HMIm ] under the condition of certain concentration proportion combination]PF 6 Ionic liquid and Al 2 O 3 The lubricating effect is improved under the synergistic effect of the nano particles. [ HMIm]PF 6 Ionic liquid and Al 2 O 3 The nano particles are two novel environment-friendly lubricating oil additives, can adapt to harsh working environments such as high temperature, high vacuum and the like, and have small environmental pollution. Wherein, Al 2 O 3 The nano particles have good physical and chemical properties, and can be used as an additive to be dispersed in lubricating oil so as to improve the wear resistance and the bearing capacity of the lubricating oil; further, [ HMIm]PF 6 High thermal stability and chemical inertness of ionic liquidThe lubricating oil has high performance and low saturated vapor pressure, and can be used as a lubricating oil additive to improve the lubricating effect of the lubricating oil. Using [ HMIm]PF 6 Ionic liquid for Al in lubricating oil 2 O 3 The surface of the nano particles is modified, so that the nano particles are stably dispersed in the lubricating oil, and the lubricating effect of the base oil is improved through a lubricating enhancement mechanism under the synergistic effect between the ionic liquid and the nano particles.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a graph showing the variation of the friction coefficient with speed of the surface of AISI4340 steel according to example 1, example 2 and comparative example 1 of the present invention;
FIG. 2 is a graph showing the variation of the friction coefficient with speed on the surface of AISI4340 steel according to example 3, example 4 and comparative example 2 of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention provides an ionic liquid and nano particle binary system additive for enhancing the lubricating effect of vegetable oil, which comprises base oil, wherein [ HMIm ] is uniformly dispersed in the base oil]PF 6 Ionic liquid and Al 2 O 3 Nanoparticles.
The base oil is vegetable oil-based or synthetic ester-based lubricating oil, and specifically, the base oil is sunflower seed oil.
The synthetic ester-based lubricating oil and the vegetable oil-based lubricating oil have good biodegradation and lubricating properties and low toxicity, and are two types of potential environment-friendly lubricating oil. As with the traditional lubricating oil base liquid, the synthetic ester and the vegetable oil also need to be matched with the additive for use, so as to improve the antifriction, antiwear and bearing capacity of the environment-friendly lubricating oil. [ HMIm]PF 6 Ionic liquid and Al 2 O 3 The nano particles are two novel environment-friendly lubricating oil additives, can adapt to harsh working environments such as high temperature, high vacuum and the like, and have small environmental pollution, wherein Al 2 O 3 The nano particles have good physical and chemical properties, and can be used as an additive to be dispersed in lubricating oil so as to improve the anti-wear and bearing capacity of the lubricating oil. Further, [ HMIm]PF 6 High thermal stability and chemical property of ionic liquidThe inertia is high, the saturated vapor pressure is low, and the lubricating effect of the lubricating oil can be improved by using the additive as the lubricating oil additive. Using [ HMIm]PF 6 Ionic liquid for Al in lubricating oil 2 O 3 The surface of the nano particles is modified, so that the nano particles are stably dispersed in the lubricating oil, and the lubricating effect of the base oil is improved through a lubricating enhancement mechanism under the synergistic effect between the ionic liquid and the nano particles.
In the case of the example 1, the following examples are given,
uniformly dispersed 0.2 wt.% [ HMIm ] in sunflower seed oil]PF 6 Ionic liquid and 0.1 wt.% Al 2 O 3 Nanoparticles, which are then disposed at the frictional interface between the AISI4340 steel surface and the ceramic.
In the case of the example 2, the following examples are given,
uniformly dispersed 0.8 wt.% [ HMIm ] in sunflower seed oil]PF 6 Ionic liquid and 0.1 wt.% Al 2 O 3 Nanoparticles, which are then disposed at the frictional interface between the AISI4340 steel surface and the ceramic.
In the comparative example 1,
0.1 wt.% of Al is uniformly dispersed in the sunflower seed oil 2 O 3 Nanoparticles, which are then disposed at the frictional interface between the AISI4340 steel surface and the ceramic.
Curves of the friction coefficient of the AISI4340 steel surface as a function of the sliding speed were obtained by equally setting example 1, example 2 and comparative example 1 at the friction interface between the AISI4340 steel surface and the ceramic, as shown in fig. 1, wherein (1) sunflower oil +0.1 wt.% Al2O3 nanoparticles (open triangle data points), (2) sunflower oil +0.1 wt.% Al2O3 nanoparticles +0.2 wt.% HMIm PF6 ionic liquid (solid triangle data points), (3) sunflower oil +0.1 wt.% Al2O3 nanoparticles +0.8 wt.% HMIm PF6 ionic liquid (solid square data points); the normal load is 50N.
In the case of the embodiment 3, the following examples,
uniformly dispersed 0.2 wt.% [ HMIm ] in sunflower seed oil]PF 6 Ionic liquid and 0.4 wt.% Al 2 O 3 Nanoparticles, which are then disposed at the frictional interface between the AISI4340 steel surface and the ceramic.
In the case of the example 4, the following examples are given,
uniformly dispersed 0.8 wt.% [ HMIm ] in sunflower seed oil]PF 6 Ionic liquid and 0.4 wt.% Al 2 O 3 Nanoparticles, which are then disposed at the frictional interface between the AISI4340 steel surface and the ceramic.
In a comparative example 2,
0.4 wt.% of Al is uniformly dispersed in the sunflower seed oil 2 O 3 Nanoparticles, which are then disposed at the frictional interface between the AISI4340 steel surface and the ceramic.
Curves of the friction coefficient of the AISI4340 steel surface as a function of sliding speed were obtained by equally setting example 3, example 4 and comparative example 2 at the friction interface between the AISI4340 steel surface and the ceramic, as shown in fig. 2, wherein (1) sunflower oil +0.4 wt.% Al2O3 nanoparticles (open triangle data points), (2) sunflower oil +0.4 wt.% Al2O3 nanoparticles +0.2 wt.% HMIm PF6 ionic liquid (solid triangle data points), (3) sunflower oil +0.4 wt.% Al2O3 nanoparticles +0.8 wt.% HMIm PF6 ionic liquid (solid square data points); the normal load is 50N.
Further comparison of the above examples gave [ HMIm]PF 6 Ionic liquid and Al 2 O 3 The nano particles can greatly improve the lubricating effect of the base oil through a lubricating enhancement mechanism under a synergistic effect.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. Ionic liquid and nano particle binary system for enhancing lubricating effect of vegetable oilAdditive comprising a base oil, characterized in that [ HMIm ] is homogeneously dispersed in said base oil]PF 6 Ionic liquid and Al 2 O 3 Nanoparticles.
2. The ionic liquid, nanoparticle binary system additive for enhancing the lubricating effect of vegetable oils as claimed in claim 1, wherein the base oil is a vegetable oil-based or synthetic ester-based lubricating oil.
3. The ionic liquid, nanoparticle binary system additive for enhancing the lubricating effect of vegetable oil as claimed in claim 1, wherein the base oil is sunflower seed oil.
4. The ionic liquid, nanoparticle binary system additive to enhance vegetable oil lubrication according to claim 1, wherein 0.2 wt.% of [ HMIm ] is homogeneously dispersed in the base oil]PF 6 Ionic liquid and 0.1 wt.% Al 2 O 3 Nanoparticles.
5. The ionic liquid, nanoparticle binary system additive to enhance vegetable oil lubrication according to claim 1, wherein 0.8 wt.% of [ HMIm ] is homogeneously dispersed in the base oil]PF 6 Ionic liquid and 0.1 wt.% Al 2 O 3 Nanoparticles.
6. The ionic liquid, nanoparticle binary system additive to enhance vegetable oil lubrication according to claim 1, wherein 0.2 wt.% of [ HMIm ] is homogeneously dispersed in the base oil]PF 6 Ionic liquid and 0.4 wt.% Al 2 O 3 Nanoparticles.
7. The ionic liquid, nanoparticle binary system additive to enhance vegetable oil lubrication according to claim 1, wherein 0.8 wt.% of [ HMIm ] is homogeneously dispersed in the base oil]PF 6 Ionic liquid and 0.4 wt.% Al 2 O 3 Nanoparticles.
8. An ionic liquid, nanoparticle binary system additive to enhance the lubricating effect of a vegetable oil as claimed in any one of claims 1 to 7 for use as a metal working lubricant or as a machine lubricant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210233517.XA CN114806680A (en) | 2022-03-10 | 2022-03-10 | Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210233517.XA CN114806680A (en) | 2022-03-10 | 2022-03-10 | Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114806680A true CN114806680A (en) | 2022-07-29 |
Family
ID=82528126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210233517.XA Pending CN114806680A (en) | 2022-03-10 | 2022-03-10 | Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114806680A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103242934A (en) * | 2013-04-02 | 2013-08-14 | 华南理工大学 | Ionic liquid/vegetable oil microemulsion type biological lubricant base oil and preparation method thereof |
CN112375602A (en) * | 2020-11-20 | 2021-02-19 | 常熟理工学院 | Ionic liquid-based nanofluid cutting fluid and preparation method thereof |
-
2022
- 2022-03-10 CN CN202210233517.XA patent/CN114806680A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103242934A (en) * | 2013-04-02 | 2013-08-14 | 华南理工大学 | Ionic liquid/vegetable oil microemulsion type biological lubricant base oil and preparation method thereof |
CN112375602A (en) * | 2020-11-20 | 2021-02-19 | 常熟理工学院 | Ionic liquid-based nanofluid cutting fluid and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Kalakada et al. | Analysis of static and dynamic performance characteristics of THD journal bearing operating under lubricants containing nanoparticles | |
Singh et al. | Properties, functions and applications of commonly used lubricant additives: A review | |
Vadiraj et al. | Effect of nano oil additive proportions on friction and wear performance of automotive materials | |
Abdollah et al. | Experimental analysis of tribological performance of palm oil blended with hexagonal boron nitride nanoparticles as an environment-friendly lubricant | |
Reeves et al. | Ionic liquids: a plausible future of bio-lubricants | |
CN103602376B (en) | A kind of Composite nanometer antiwear agent and preparation method thereof | |
Zheng et al. | Synergistic effects between the two choline-based ionic liquids as lubricant additives in glycerol aqueous solution | |
CN108165351B (en) | High-low temperature instrument oil composition and preparation method thereof | |
CN103666189A (en) | Self-lubricating wear-resistant coating resistant to impact and high-temperature ablation and preparation method thereof | |
Cao et al. | Study on the preparation and tribological properties of fly ash as lubricant additive for steel/steel pair | |
CN114806680A (en) | Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil | |
Hao et al. | Tribological evaluation and lubrication mechanisms of nanoparticles enhanced lubricants in cold rolling | |
Shankar et al. | Experimental studies on viscosity, thermal and tribological properties of vegetable oil (kapok oil) with boric acid as an additive | |
Pabsetti et al. | Performance of hydraulic oils and its additives in fluid power system: A review | |
CN109652194B (en) | Water-based lubricating composition for titanium alloy friction pair | |
Akl et al. | An experimental investigation of tribological performance of a lubricant using different nano additives | |
Çöl et al. | Tribological behaviours of lubricating oils with CNT and Si 3 N 4 nanoparticle additives | |
KR101404140B1 (en) | lubricant composition containing nano molybdenum oxide | |
Khasbage et al. | Performance of Jatropha Biolubricant for Hydrodynamic Journal Bearing Lubrication | |
CN105238501A (en) | Environment-friendly nanometer lubricant additive | |
CN103275788A (en) | Preparation method of nanometer additive lubricating oil with ultra lubrication effect | |
Levchenko et al. | New generation carbon coatings with monocrystalline structure as the promising new method of oil lubricity increasing | |
CN103603608B (en) | A kind of bidirectional protective lubricating and wear-resisting connects hoop | |
Reeves et al. | The effect of particulate additives on the tribological performance of bio-based and ionic liquid-based lubricants for energy conservation and sustainability | |
CN112899056A (en) | Lubricating oil for mining machinery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |