CN103242934B - Ionic liquid/vegetable oil microemulsion type biological lubricant base oil and preparation method thereof - Google Patents
Ionic liquid/vegetable oil microemulsion type biological lubricant base oil and preparation method thereof Download PDFInfo
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Abstract
The invention discloses ionic liquid/vegetable oil microemulsion type biological lubricant base oil and a preparation method thereof. The ionic liquid/vegetable oil microemulsion type biological lubricant base oil comprises the following components in parts by mass: 1 part of ionic liquid, 1-30 parts of vegetable oil and 1.5-68 parts of surfactant, wherein the amount of cosurfactant is 0-12 times more than that of the ionic liquid. The preparation method comprises the following steps: evenly mixing the surfactant and the cosurfactant; evenly mixing the obtained mixture and the vegetable oil; and dropwisely adding a certain amount of ionic liquid into the oil-containing mixture to obtain a transparent homogeneous reversed-phase ionic liquid microemulsion system. The microemulsion has high stability; the raw material sources are green and environment-friendly; and the obtained lubricant base oil has excellent viscosity-temperature characteristics, heat stability and nano additive compatibility.
Description
Technical field
The present invention relates to a kind of biological lubricant, particularly relate to biological lubricant base oil of a kind of ionic liquid/vegetables oil microemulsion-type and preparation method thereof, specifically refer to taking vegetables oil as nonpolar phase, taking ionic liquid as polar phase, adopt micro-emulsion technology to prepare a kind of new bio lubricant base.
Background technology
The development of new and high technology and the reinforcement of environmental regulation performance and the environment compatibility to lubricant had higher requirement.Tradition oil-based lubricant not only faces grave danger of scarcity of resources, also be difficult to meet environment compatibility requirement simultaneously, therefore replace mineral oil with resourceful crude vegetal, developing high performance biological lubricant base oil has extremely important effect to new and high technology innovation and the strategy of sustainable development.Vegetables oil is the triglyceride being formed by glycerine and lipid acid chemical combination, contains a large amount of unsaturated double-bonds and makes vegetables oil have good viscosity-temperature characteristic, thereby have outstanding lubricity in its structure.But be to affect vegetables oil directly as the unfavorable factor of lubricant but thermo-oxidative stability is poor, viscosity is high.
Ionic liquid, as a kind of novel medium and material of the physical and chemical performance with many excellences, is subject to increasing research and pays close attention in novel lubricant field.The advantages such as its fusing point is low, non-volatile, liquid temperature wide ranges, Heat stability is good, dissolving power is strong, character is adjustable make it possess the primary condition that becomes a kind of excellent property lubricant.At present, existing correlative study shows, different types of imidazole type ion liquid has excellent lubricity.But, the drawbacks limit that the consistency of ionic liquid and multiple additives is poor its development in field of lubricant.In addition, the also extreme difference of intermiscibility of a lot of ionic liquids and non-polar solvent, this has also limited ionic liquid and has applied more widely at other field.
Summary of the invention
The object of the invention is to overcome the shortcomings such as vegetables oil thermo-oxidative stability is poor, viscosity is high, propose that a kind of thermo-oxidative stability is good, viscosity-temperature index is high and biodegradable lubricant base and preparation method thereof.
Microemulsion is by spontaneous in the proper ratio transparent (or translucent), low-viscosity and isotropic thermodynamic stable systems forming of component such as water, oil, tensio-active agent and cosurfactants.Since nineteen forty-three reported first microemulsion, received much concern about research and the application of microemulsion always.The prepared biological lubricant base oil of the present invention is become to be grouped into by vegetables oil, ionic liquid, tensio-active agent and cosurfactant etc., obtains evenly single reversed phase ion liquid microemulsion system by reasonable modulation.Ionic liquid is combined and also can form thermodynamically stable, transparent microemulsion system with tensio-active agent, non-polar solvent.The range of application of ionic liquid has been widened in this discovery to a great extent, thereby develops into a research neck brand-new, that have application prospect.Taking vegetables oil as nonpolar phase, taking ionic liquid as polar phase, the biological lubricant base oil that adopts micro-emulsion technology to prepare, can overcome that vegetables oil thermo-oxidative stability is poor, viscosity is high, the facile hydrolysis shortcoming such as but, promote its viscosity-temperature characteristic, thereby there is outstanding lubricity and biodegradability, and this system meets the requirement of environmental protection.
Object of the present invention is achieved through the following technical solutions:
Ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: in mass fraction, its composition comprises 1 part of ionic liquid, vegetables oil 1 ?30 parts, 1.5～68 parts, tensio-active agent; Described ionic liquid be 1 ?Ding Ji ?3 ?methyl imidazolium tetrafluoroborate, 1 ?Ding Ji ?3 ?Methylimidazole hexafluorophosphate, 1 ?Ding Ji ?3 ?Methylimidazole bromine salt, 1 ?Ding Ji ?pyridinium tetrafluoroborate salt and 1 ?Qiang Yi Ji ?3 ?one or more in methyl imidazolium tetrafluoroborate ionic liquid; Described vegetables oil is one or more in soybean oil, Viscotrol C, jatropha curcas oil, sunflower seed oil, Rice pollard oil and plam oil; Described tensio-active agent be octyl phenyl Soxylat A 25-7, cetyl trimethylammonium bromide, two (2 ?ethylhexyl) succinate sodium sulfonate, alkyl glycoside and 1 ?Shi Liu Wan Ji ?3 ?one or more in Methylimidazole villaumite;
When described tensio-active agent be octyl phenyl Soxylat A 25-7 and/or 1 ?Shi Liu Wan Ji ?3 ?when Methylimidazole villaumite, described biological lubricant base oil also comprises 0～12 part of cosurfactant;
When described tensio-active agent be cetyl trimethylammonium bromide, two (2 ?ethylhexyl) succinate sodium sulfonate and alkyl glycoside 1 ?Shi Liu Wan Ji ?3 ?one or more in Methylimidazole villaumite; Or in the time that described tensio-active agent is one or more the mixture in octyl phenyl Soxylat A 25-7 or 1-hexadecyl-3-Methylimidazole villaumite and cetyl trimethylammonium bromide, two (2-ethylhexyl) succinate sodium sulfonate and alkyl glycoside, in mass fraction, described biological lubricant base oil also comprises 1～12 part of cosurfactant;
This ionic liquid/vegetables oil microemulsion-type biological lubricant base oil is transparent liquid, dissolves each other at normal temperatures with Nanometer Copper, nano-graphite and lime borate nano lubricating oil additive.
The preparation method of described ionic liquid/vegetables oil microemulsion-type biological lubricant base oil, comprises the steps:
1), after tensio-active agent is mixed under 20 DEG C～100 DEG C temperature condition with cosurfactant, obtain the mixture of clear;
2) mixture of the clear obtaining is mixed under 20 DEG C～100 DEG C temperature condition with vegetables oil, be prepared into the oil mixture of clear;
3) under 20 DEG C～100 DEG C temperature and agitation condition, in oil mixture, drip ionic liquid, mix,, obtain ionic liquid/vegetables oil microemulsion-type biological lubricant base oil of transparent homogeneous phase.
For further realizing the object of the invention, step 1) described in to mix be to stir and realize for 5～10 minutes with the stirring velocity of 300～1200 revs/min.Step 2) described in to mix be also to stir and realize for 5～10 minutes with the stirring velocity of 300～1200 revs/min.Step 3) rotating speed of described stirring is 300～1200 revs/min, the time is 20～40 minutes.
The relative prior art of the present invention has the following advantages and beneficial effect:
(1) the present invention utilizes environmental type raw material substitution petroleum base raw material to prepare biological lubricant base oil, raw material reagent aboundresources, and environmental pollution is little.The present invention not only can solve the nervous problem of present stage petroleum resources, meets environmental requirement simultaneously.
(2) the prepared novel ion liquid micro-emulsion type biological lubricant base oil of the present invention has excellent viscosity-temperature characteristics and thermostability, the shortcoming of viscosity-temperature characteristics and poor heat stability when efficiently solving vegetables oil and using as lubricant separately.
(3) the prepared novel ion liquid micro-emulsion type biological lubricant base oil of the present invention can dissolve each other with multiple additives, for the nanometer additive that can strengthen lubricant effect, has excellent mutual solubility.Efficiently solve the immiscible defect of ionic liquid and additive, also greatly improved the lubricant effect of lubricant.
(4) the prepared novel ion liquid micro-emulsion type biological lubricant base oil of the present invention, preparation method is simple, easy to operate, is easy to control, and production cost is low.
Embodiment
Below in conjunction with embodiment, the present invention is further described, but embodiments of the present invention are not limited to this.
Embodiment 1
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: in mass fraction, ionic liquid 1 ?Ding Ji ?3 ?1 part of methyl imidazolium tetrafluoroborate, 30 parts of soybean oil, 68 parts of tensio-active agent octyl phenyl Soxylat A 25-7s, 12 parts of cosurfactant Virahols.
Under 20 DEG C of conditions, tensio-active agent is mixed with cosurfactant, 300 revs/min of stirring velocitys, stir 5 minutes, obtain the mixture of clear.Under the rotating speed agitation condition of 300 revs/min, oil phase soybean oil is added in mixture, stir 5 minutes, be prepared into the oil mixture of clear.Keep temperature and stirring velocity constant, in oil mixture, drip ionic liquid, stir 20 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, can be used as biological lubricant base oil.There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1.
Embodiment 2
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: ionic liquid 1 ?Ding Ji ?3 ?1 part of Methylimidazole bromine salt, 1 part of Viscotrol C, 1.35 parts of tensio-active agent octyl phenyl Soxylat A 25-7s, 0.15 part of tensio-active agent cetyl trimethylammonium bromide, 6 parts of cosurfactant propyl carbinols.
Under 100 DEG C of conditions, tensio-active agent is mixed with cosurfactant, 750 revs/min of stirring velocitys, stir 8 minutes, obtain the mixture of clear.Under 750 revs/min of agitation conditions, oil phase Viscotrol C is added in mixture, stir 8 minutes, be prepared into oil mixture.Keep temperature and stirring velocity constant, in oil mixture, drip ionic liquid, stir 40 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, the reversed phase ion liquid microemulsion system that obtains transparent homogeneous phase, can be used as biological lubricant base oil.There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1.
Embodiment 3
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: ionic liquid 1 ?Ding Ji ?3 ?1 part of methyl imidazolium tetrafluoroborate, 15 parts of Rice pollard oils, 32.67 parts of tensio-active agent octyl phenyl Soxylat A 25-7s, tensio-active agent 1 ?Shi Liu Wan Ji ?3 ?0.33 part of Methylimidazole villaumite, 1 part of cosurfactant n-hexyl alcohol.
Under 60 DEG C of conditions, tensio-active agent is mixed, 1200 revs/min of stirring velocitys, stir 10 minutes, obtain the mixture of clear.Under 1200 revs/min of agitation conditions, oil phase is added in mixture, stir 10 minutes, be prepared into oil mixture.Keep temperature and stirring velocity constant, in oil-containing, drip ionic liquid, stir 30 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, can be used as biological lubricant base oil.。There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1
Embodiment 4
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: in mass fraction, ionic liquid 1 ?Ding Ji ?3 ?1 part of Methylimidazole hexafluorophosphate, 30 parts of plam oils, 10 parts of tensio-active agent cetyl trimethylammonium bromides, tensio-active agent 1 ?Shi Liu Wan Ji ?3 ?10 parts of Methylimidazole villaumites, 12 parts of cosurfactant nonylcarbinols.
Under 20 DEG C of conditions, tensio-active agent is mixed with cosurfactant, 300 revs/min of stirring velocitys, stir 5 minutes, obtain the mixture of clear.Under the rotating speed agitation condition of 300 revs/min, oil phase is added in mixture, stir 5 minutes, be prepared into the oil mixture of clear.Keep temperature and stirring velocity constant, in oil mixture, drip ionic liquid, stir 20 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, can be used as biological lubricant base oil.There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1.
Embodiment 5
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: in mass fraction, ionic liquid 1 ?Ding Ji ?1 part of pyridinium tetrafluoroborate salt, 30 parts of rapeseed oils, tensio-active agent 1 ?Shi Liu Wan Ji ?3 ?20 parts of Methylimidazole villaumites.
Under 100 DEG C of conditions, tensio-active agent is mixed with cosurfactant, 750 revs/min of stirring velocitys, stir 8 minutes, obtain the mixture of clear.Under 750 revs/min of agitation conditions, oil phase is added in mixture, stir 8 minutes, be prepared into oil mixture.Keep temperature and stirring velocity constant, in oil mixture, drip ionic liquid, stir 40 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, the reversed phase ion liquid microemulsion system that obtains transparent homogeneous phase, can be used as biological lubricant base oil.There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1.
Embodiment 6
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: in mass fraction, ionic liquid 1 ?Qiang Yi Ji ?3 ?1 part of methyl imidazolium tetrafluoroborate, 30 parts of jatropha curcas oils, tensio-active agent 1 ?Shi Liu Wan Ji ?3 ?32 parts of Methylimidazole villaumites, tensio-active agent 1 ?Shi Liu Wan Ji ?3 ?32 parts of Methylimidazole two (2 ?ethylhexyl) succinate sodium sulfonates, 12 parts of cosurfactant Pentyl alcohols.
Under 60 DEG C of conditions, tensio-active agent is mixed, 1200 revs/min of stirring velocitys, stir 10 minutes, obtain the mixture of clear.Under 1200 revs/min of agitation conditions, oil phase is added in mixture, stir 10 minutes, be prepared into oil mixture.Keep temperature and stirring velocity constant, in oil-containing, drip ionic liquid, stir 30 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, can be used as biological lubricant base oil.There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1.
Embodiment 7
Component and the consumption thereof of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil: in mass fraction, ionic liquid 1 ?Ding Ji ?3 ?1 part of methyl imidazolium tetrafluoroborate, 30 parts of epoxy soybean oils, 68 parts of tensio-active agent octyl phenyl Soxylat A 25-7s, 32 parts of Surfactants Alkyls, 12 parts of cosurfactant n-Octanols.
Under 20 DEG C of conditions, tensio-active agent is mixed with cosurfactant, 300 revs/min of stirring velocitys, stir 5 minutes, obtain the mixture of clear.Under the rotating speed agitation condition of 300 revs/min, oil phase is added in mixture, stir 5 minutes, be prepared into the oil mixture of clear.Keep temperature and stirring velocity constant, in oil mixture, drip ionic liquid, stir 20 minutes, obtain the reversed phase ion liquid microemulsion system of transparent homogeneous phase, can be used as biological lubricant base oil.There is not chemical reaction in preparation process of the present invention, easy to operate, and experimental installation is simple and energy consumption is low.Raw material for the preparation of lubricant base all has stronger biological degradability, has avoided environmental pollution damage.The lubricant base of gained microemulsified can make nanometer additive stable dispersion in system such as Nanometer Copper, nano-graphite, lime borate, has significantly improved antifriction, the abrasion resistance of lubricating oil.The performance perameter of this lubricant base is in table 1.
The various performance parameters of table 1 gained lubricant base
As shown in Table 1, the lubricant base viscosity-temperature index of gained of the present invention is all more than 80, higher than the vegetables oil viscosity-temperature index that is used alone as lubricant base.Oxidative stability test result shows, gained base oil after oxidation, viscosity velocity of variation is lower.
In table 1, the detection method of various performance parameters is as follows:
(1) microemulsion outward appearance: range estimation.
(2) microemulsion emulsifying stability: centrifuging.By embodiment 1 ?the microemulsion for preparing in 3 be placed in the biochemical cultivation case one week of 40 DEG C.Each 6ml that takes out is placed in centrifuge tube, and centrifugal 15min under 3000 revs/min of speed observes whether layering of sample.If without layering, interpret sample is stable microemulsion.
(3) particle diameter: Ma Erwen laser particle analyzer test.
(4) viscosity: rotational viscosimeter NDJ ?5S test.
(5) oxidative stability: viscosity velocity of variation method.Sample thief 10g, is positioned in 200 DEG C of constant temperature oil baths, passes into air 12h, and air flow quantity is 15L/h, measures 40 DEG C of viscosity numbers after formation testing oxidation, weighs oxidation of lubricating oil stability with the viscosity velocity of variation before and after being oxidized.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under spirit of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (5)
1. ionic liquid/vegetables oil microemulsion-type biological lubricant base oil, is characterized in that: in mass fraction, its composition comprises 1 part of ionic liquid, vegetables oil 1 ?30 parts, 1.5～68 parts, tensio-active agent; Described ionic liquid be 1 ?Ding Ji ?3 ?methyl imidazolium tetrafluoroborate, 1 ?Ding Ji ?3 ?Methylimidazole hexafluorophosphate, 1 ?Ding Ji ?3 ?Methylimidazole bromine salt, 1 ?Ding Ji ?pyridinium tetrafluoroborate salt and 1 ?Qiang Yi Ji ?3 ?one or more in methyl imidazolium tetrafluoroborate ionic liquid; Described vegetables oil is one or more in soybean oil, Viscotrol C, jatropha curcas oil, sunflower seed oil, Rice pollard oil and plam oil; Described tensio-active agent be octyl phenyl Soxylat A 25-7, cetyl trimethylammonium bromide, two (2 ?ethylhexyl) succinate sodium sulfonate, alkyl glycoside and 1 ?Shi Liu Wan Ji ?3 ?one or more in Methylimidazole villaumite;
When described tensio-active agent be octyl phenyl Soxylat A 25-7 and/or 1 ?Shi Liu Wan Ji ?3 ?when Methylimidazole villaumite, described biological lubricant base oil also comprises 0～12 part of cosurfactant;
When described tensio-active agent be cetyl trimethylammonium bromide, two (2 ?ethylhexyl) succinate sodium sulfonate and alkyl glycoside 1 ?Shi Liu Wan Ji ?3 ?one or more in Methylimidazole villaumite; Or when described tensio-active agent be octyl phenyl Soxylat A 25-7 or 1 ?Shi Liu Wan Ji ?3 ?when one or more mixture in Methylimidazole villaumite and cetyl trimethylammonium bromide, two (2 ?ethylhexyl) succinate sodium sulfonate and alkyl glycoside, in mass fraction, described biological lubricant base oil also comprises 1～12 part of cosurfactant;
Described cosurfactant is one or more in Virahol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Octanol and nonylcarbinol;
This ionic liquid/vegetables oil microemulsion-type biological lubricant base oil is transparent liquid, dissolves each other at normal temperatures with Nanometer Copper, nano-graphite and lime borate nano lubricating oil additive.
2. the preparation method of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil claimed in claim 1, is characterized in that comprising the steps:
1), after tensio-active agent is mixed under 20 DEG C～100 DEG C temperature condition with cosurfactant, obtain the mixture of clear;
2) mixture of the clear obtaining is mixed under 20 DEG C～100 DEG C temperature condition with vegetables oil, be prepared into the oil mixture of clear;
3) under 20 DEG C～100 DEG C temperature and agitation condition, in oil mixture, drip ionic liquid, mix, obtain ionic liquid/vegetables oil microemulsion-type biological lubricant base oil of transparent homogeneous phase.
3. the preparation method of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil according to claim 2, is characterized in that: step 1) described in to mix be to stir and realize for 5～10 minutes with the stirring velocity of 300～1200 revs/min.
4. the preparation method of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil according to claim 2, is characterized in that: step 2) described in to mix be to stir and realize for 5～10 minutes with the stirring velocity of 300～1200 revs/min.
5. the preparation method of ionic liquid/vegetables oil microemulsion-type biological lubricant base oil according to claim 2, is characterized in that: step 3) rotating speed of described stirring is 300～1200 revs/min, the time is 20～40 minutes.
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| CN103937587A (en) * | 2014-04-28 | 2014-07-23 | 华南理工大学 | Vegetable oil based ionic liquid microemulsion type nano lubricating oil and preparation method thereof |
| JP6374708B2 (en) * | 2014-05-29 | 2018-08-15 | デクセリアルズ株式会社 | Ionic liquid, lubricant and magnetic recording medium |
| CN106420610B (en) * | 2016-10-21 | 2019-06-11 | 昆明理工大学 | A kind of ionic liquid micro emulsion and its application |
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| CN108841436B (en) * | 2018-07-26 | 2021-03-16 | 颜凤生 | Vegetable lubricating oil containing graphene-polymer fibers |
| CN109181831A (en) * | 2018-09-28 | 2019-01-11 | 陈太师 | A kind of preparation method of stable type biological lubricant |
| CN109628769B (en) * | 2019-02-02 | 2021-04-06 | 东北大学 | Method for extracting light rare earth elements in acidic solution by adopting ionic liquid microemulsion |
| CN109913300B (en) * | 2019-03-28 | 2022-12-16 | 乐福思健康用品有限公司 | Biodegradable environment-friendly lubricant and preparation method thereof |
| CN111218323B (en) * | 2020-02-24 | 2022-06-14 | 辽宁大学 | Environment-friendly lubricating oil and preparation method thereof |
| CN111317067A (en) * | 2020-03-20 | 2020-06-23 | 广州市优百特饲料科技有限公司 | Emulsified nano fat powder and preparation method and application thereof |
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| CN111763478B (en) * | 2020-07-21 | 2021-11-02 | 中国工程物理研究院机械制造工艺研究所 | Chemical polishing solution for KDP crystal, preparation method and polishing method |
| CN113817532A (en) * | 2021-10-29 | 2021-12-21 | 无锡奇比特润滑油有限公司 | Piezofluorescence color-changing lubricating oil and preparation process thereof |
| CN114806680A (en) * | 2022-03-10 | 2022-07-29 | 湖南三一工业职业技术学院 | Ionic liquid and nano particle binary system additive for enhancing lubricating effect of vegetable oil |
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