CN115305128B - Antibacterial lubricating grease composition and preparation and application thereof - Google Patents

Antibacterial lubricating grease composition and preparation and application thereof Download PDF

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Publication number
CN115305128B
CN115305128B CN202210880230.6A CN202210880230A CN115305128B CN 115305128 B CN115305128 B CN 115305128B CN 202210880230 A CN202210880230 A CN 202210880230A CN 115305128 B CN115305128 B CN 115305128B
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antibacterial
grease composition
lubricating grease
coupling agent
base oil
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CN115305128A (en
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包锐
张军
刘亚春
张颖
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China Petroleum and Chemical Corp
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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
    • 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
    • C10M2201/0626—Oxides; Hydroxides; Carbonates or bicarbonates used as thickening agents
    • 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
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/0656—Sulfides; Selenides; Tellurides used as thickening agents
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/105—Silica
    • 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
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/06—Well-defined aromatic compounds
    • C10M2203/065—Well-defined aromatic compounds 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/1033—Polyethers, i.e. containing di- or higher polyoxyalkylene groups 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/04—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions having a silicon-to-carbon bond, e.g. organo-silanes
    • 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
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • 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
    • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
    • 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
    • C10N2030/16—Antiseptic; (micro) biocidal or bactericidal
    • 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
    • C10N2030/36—Seal compatibility, e.g. with rubber
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

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  • 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 relates to the technical field of lubricating grease, and particularly provides a bacteriostatic lubricating grease composition and preparation and application thereof, wherein the bacteriostatic lubricating grease composition comprises base oil, a thickening agent, a structure promoter and a coupling agent, and the thickening agent is more than one of titanium dioxide, zinc oxide, zinc sulfide, magnesium oxide and aluminum oxide; the structure promoter is SiO 2 And/or organobentonite; the coupling agent is a silane coupling agent and/or a titanate coupling agent. The antibacterial grease composition provided by the invention has an antibacterial rate of more than 99.90% for staphylococcus aureus, candida albicans and escherichia coli, combines other performances of the conventional antibacterial grease composition, has good colloid stability, mechanical stability, extreme pressure abrasion resistance and corrosion resistance, and can be used for lubrication, sealing and protection under the working conditions with high requirements on antibacterial cleanliness, such as medical instruments, pharmaceutical preparation equipment and medical consumable processing machinery.

Description

Antibacterial lubricating grease composition and preparation and application thereof
Technical Field
The invention relates to the technical field of lubricating grease, in particular to a bacteriostatic lubricating grease composition and preparation and application thereof.
Background
The improvement of the living standard of people is accompanied by the pursuit of health. WHO has proposed a global theme of the 21 st century as "health and hygiene", and the environment in which individuals are located has a close influence on people's lives and health. The increase in human activity, concomitant global warming and environmental pollution, are excellent conditions for the proliferation of microorganisms, causing the rate and incidence of infection of infectious diseases to rise year by year. WHO statistics show that about 1500 tens of thousands of people die annually from infection, accounting for about 25.5% of the total annual mortality worldwide. With the gradual evolution of microbial pathogens, and excessive abuse of antibiotic drugs, microbial resistance to drugs has become one of the major public health threats in the 21 st century. The medical instrument pollution in hospitals is also a main way of bacterial infection, the infection rate in China is as high as 8.5-9.7%, and the infection rate approaches to the highest value of 5-10% of the average infection rate in the world. Microbial growth is controlled from the source, and the method becomes the optimal mode for preventing microbial transmission.
At present, the parts such as a transmission mechanism, a sealing gasket and the like of the medical instrument are usually inside equipment, and after being infiltrated and polluted by medical wastes, human tissues, human blood and the like, the parts are not easy to clean, so that bacterial residues are propagated, human infection is easily caused after cyclic use, and the human health is seriously threatened.
Therefore, research on lubricating grease with good antibacterial function and conventional performance is of great significance.
Disclosure of Invention
The antibacterial grease composition provided by the invention has excellent antibacterial performance, can effectively inhibit pathogenic bacteria such as staphylococcus aureus, candida albicans and escherichia coli, has other performances of the conventional antibacterial grease composition, has good colloid stability, mechanical stability, extreme pressure wear resistance and corrosion resistance, can be used for lubricating and protecting medical instruments, pharmaceutical preparation equipment, medical consumable processing machinery and working conditions with high requirements on the cleanliness of the antibacterial agent, ensures that relevant parts are not polluted, and avoids the problem of human health.
In order to achieve the above purpose, the invention provides a bacteriostatic lubricating grease composition, which comprises base oil, a thickening agent, a structure promoter and a coupling agent;
the thickening agent is inorganic metal oxide and/or sulfide; the oxide is more than one of titanium dioxide, zinc oxide, magnesium oxide and aluminum oxide; the sulfide is zinc sulfide; the content of the thickening agent is 5-55% of the weight of the antibacterial lubricating grease composition when the thickening agent does not contain the coupling agent;
the structure promoter is SiO 2 And/or organic bentonite, wherein the content of the structure promoter is 0.5-10% of the weight of the antibacterial lubricating grease composition when the structure promoter does not contain a coupling agent;
the coupling agent is a silane coupling agent and/or a titanate coupling agent; the content of the coupling agent is 3-20% of the weight of the thickener;
the antibacterial lubricating grease composition has antibacterial effect on staphylococcus aureus, candida albicans and escherichia coli, and the antibacterial rate is over 99.90 percent.
The antibacterial grease is prepared by the prior art, and the prepared grease has the defects of long working hours, limited antibacterial effect and the like because of adding a bacteriostatic agent or a food additive into the general grease. And the related equipment of the medical apparatus is lubricated for life, and the required lubricating grease has longer service life than the common lubricating grease.
According to the antibacterial lubricating grease composition provided by the invention, the base oil is ether oil or alkyl naphthalene, and the viscosity of the base oil at 100 ℃ is 2-300 mm 2 And/s. The invention adopts ether oil or alkyl naphthalene as base oil, has more excellent oxidation induction period than common base oil, and can obviously prolong the service life of the lubricating grease.
According to the bacteriostatic lubricating grease composition provided by the invention, the bacteriostatic lubricating grease composition further comprises an antioxidant.
According to the antibacterial lubricating grease composition provided by the invention, the content of the antioxidant is 0.5-5% of the weight of the antibacterial lubricating grease composition when the coupling agent is not contained.
According to the antibacterial lubricating grease composition provided by the invention, the antioxidant is more than one of tert-butylphenol, tert-butylphenol derivatives, diphenylamine, naphthylamine and naphthylamine derivatives.
The invention also provides a preparation method of the antibacterial lubricating grease composition, wherein the thickening agent is added into the base oil, the thickening agent and the structural modifier are added into the base oil for mixing, the coupling agent is added for mixing, and the antibacterial lubricating grease composition is prepared by grinding uniformly.
The specific process can be as follows: adding a thickening agent and a structure promoter into base oil, mixing and heating to 60-100 ℃, reacting for 20-100 minutes, adding a coupling agent, then heating to 120-180 ℃ for reacting for 20-90 minutes, reducing the temperature of materials to below 120 ℃, then adding an antioxidant, stirring uniformly, and grinding to obtain the antibacterial lubricating grease composition.
The invention also provides application of the antibacterial lubricating grease composition, wherein the antibacterial lubricating grease composition is used for lubrication, sealing and protection of medical equipment.
The invention also provides application of the antibacterial lubricating grease composition, wherein the antibacterial lubricating grease composition is used for lubrication, sealing and protection of pharmaceutical preparation equipment.
The invention also provides application of the antibacterial lubricating grease composition, wherein the antibacterial lubricating grease composition is used for lubrication, sealing and protection of medical consumable processing machinery.
The bacteriostasis rate (measured by JIS Z2801-2010 method) of the commercially available grease is shown in the following table:
Figure BDA0003763889830000031
Figure BDA0003763889830000041
the antibacterial lubricating grease composition has antibacterial effect on staphylococcus aureus, candida albicans and escherichia coli, the antibacterial rate can reach 99.90%, and the antibacterial activity can reach 4.2-6.8.
According to the antibacterial grease composition and the preparation and application thereof, the specific thickening agent is added into the base oil, so that the thickening agent can not only play a role in thickening but also enable the antibacterial grease composition to have excellent antibacterial performance in the antibacterial grease composition system constructed by the invention, and can effectively inhibit pathogenic bacteria such as staphylococcus aureus, candida albicans, escherichia coli and the like; according to the antibacterial lubricating grease composition, by selecting the special base oil and the thickening agent, a stable colloid structure (a dropping point with higher temperature is realized, and a steel mesh oil separation is tested under a higher temperature condition and a better test result is obtained) can be formed, so that the prepared lubricating grease has excellent oxidation stability, better colloid stability and mechanical stability, and the service life of equipment is ensured. The lubricating grease with the antibacterial function is adopted at the transmission mechanism or the sealing gasket part of the medical instrument, so that the transmission of bacteria can be effectively stopped, and the infection of a human body caused after the use can be prevented.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. The reagents or equipment used were conventional products available for purchase by regular vendors without the manufacturer's attention.
The antioxidant adopted in the invention is more than one of tertiary butyl phenol, tertiary butyl phenol derivatives, diphenylamine, naphthylamine and naphthylamine derivatives.
Example 1
TiO is mixed with 2 Adding organic bentonite into polyether base oil, mixing and heating to 90 ℃ for reaction for 60 minutes, adding a silane coupling agent, then heating to 140 ℃ for reaction for 50 minutes, after the reaction is finished, reducing the temperature of the materials to 90 ℃, adding an antioxidant, uniformly stirring and grinding to obtain the antibacterial lubricating grease composition; wherein the viscosity of the base oil at 100deg.C is 100mm 2 /s, and base oil, tiO 2 The proportions of the organobentonite and the antioxidant in the weight of the bacteriostatic grease composition when the organobentonite and the antioxidant are not containing the silane coupling agent are shown in the following Table 1, and the addition amount of the silane coupling agent is powdery TiO 2 5% by weight.
Example 2
ZnO and SiO 2 Adding the mixture into alkyl naphthalene base oil, mixing and heating the mixture to 65 ℃ for reaction for 45 minutes, adding a composite coupling agent (a mixture of a silane coupling agent and a titanate coupling agent with the mass ratio of 1:1), heating the mixture to 180 ℃ for reaction for 35 minutes, cooling the material temperature to 100 ℃ after the reaction is finished, adding an antioxidant, stirring the mixture uniformly, and grinding the mixture to obtain the antibacterial lubricating grease composition; wherein the viscosity of the base oil at 100deg.C is 50mm 2 /s, and base oil、ZnO、SiO 2 And the antioxidant, the weight ratio of which is shown in Table 1 below, was 10% of the weight of the powdered ZnO.
Example 3
MgO and SiO 2 Adding the antibacterial lubricating grease composition into polyether base oil, mixing and heating the mixture to 80 ℃ for reaction for 90 minutes, adding a titanate coupling agent, then heating the mixture to 130 ℃ for reaction for 90 minutes, after the reaction is finished, reducing the temperature of the materials to 50 ℃, adding an antioxidant, uniformly stirring and grinding the mixture to obtain the antibacterial lubricating grease composition; wherein the viscosity of the base oil at 100deg.C is 150mm 2 /s, and base oil, mgO, siO 2 And the antioxidant are added in an amount of 20% by weight of the powdered MgO, based on the weight of the grease composition without the titanate coupling agent, as shown in Table 1 below.
Example 4
Adding ZnS and organic bentonite into polyether base oil, mixing and heating to 100 ℃ for reaction for 100 minutes, adding a silane coupling agent, then heating to 165 ℃ for reaction for 40 minutes, after the reaction is finished, reducing the temperature of the materials to below 120 ℃, adding an antioxidant, uniformly stirring and grinding to obtain the antibacterial lubricating grease composition; wherein the viscosity of the base oil at 100deg.C is 220mm 2 And the proportions of the base oil, znS, organobentonite and antioxidant in the weight of the bacteriostatic grease composition when not containing a silane coupling agent are shown in Table 1 below, the addition amount of the silane coupling agent being 3% of the weight of the powdery ZnS.
Example 5
Al is added with 2 O 3 SiO (silicon oxide) 2 Adding the mixture into alkyl naphthalene base oil, mixing and heating the mixture to 70 ℃ for reaction for 25 minutes, adding a composite coupling agent (a mixture of a silane coupling agent and a titanate coupling agent with the mass ratio of 2:1), heating the mixture to 135 ℃ for reaction for 55 minutes, cooling the material temperature to below 120 ℃ after the reaction is finished, adding an antioxidant, stirring the mixture uniformly, and grinding the mixture to obtain the antibacterial lubricating grease composition; wherein the viscosity of the base oil at 100deg.C is 20mm 2 /s, and base oil, al 2 O 3 、SiO 2 And antioxidantThe ratio of the addition amount of the agent to the weight of the bacteriostatic lubricating grease composition without the composite coupling agent is shown in the following table 1, and the addition amount of the composite coupling agent is powdery Al 2 O 3 12% by weight.
Example 6
A method of preparing a bacteriostatic grease composition, which is substantially identical to example 1, except that: the performance index of the prepared antibacterial grease composition was tested without the inclusion of a structural accelerator (the addition ratio of other substances was kept the same as that of the examples), the working cone penetration was prolonged, and the mechanical stability of the grease was judged as an index, and the test results are shown in the following table, and compared with example 1, it can be seen that the mechanical stability of example 1 is better than that of example 6.
The process recipes for examples 1 to 5 of the invention are shown in Table 1 below:
TABLE 1
Figure BDA0003763889830000061
Figure BDA0003763889830000071
The antibacterial grease compositions prepared in examples 1 to 6 were tested, and the indexes and test methods of the tests are shown in Table 2 below; the test results are shown in tables 3 to 4 below.
Table 2. Index of test and corresponding test method
Figure BDA0003763889830000072
Table 3 antibacterial properties of antibacterial grease compositions prepared in examples 1 to 6
Figure BDA0003763889830000073
Figure BDA0003763889830000081
TABLE 4 other Properties of the antibacterial grease compositions prepared in examples 1 to 6
Figure BDA0003763889830000082
Comparative example 1
A method of preparing a composition substantially identical to example 1, except that: tiO is mixed with 2 Instead of being ferric oxide, the composition is not fattable, ferric oxide precipitates directly in the base oil.
Comparative example 2
A method of preparing a composition substantially identical to example 1, except that: tiO is mixed with 2 Instead of copper oxide, the composition is not fattable and the copper oxide precipitates directly in the base oil.
Analysis and discussion:
as shown in the table, the antibacterial lubricating grease composition has excellent antibacterial rate, the antibacterial activity value is more than 2.0, and the extreme pressure antiwear performance, colloid stability, mechanical stability and corrosion resistance of the general lubricating grease composition can be considered.
The antibacterial lubricating grease composition has excellent antibacterial property, can meet the requirements of medical appliances, pharmaceutical preparation equipment, medical consumable processing machinery and high requirements on the degree of cleanliness of antibacterial treatment, is not polluted, and avoids the problem of human health;
according to the antibacterial lubricating grease composition, special base oil and thickener are selected, so that a stable colloid structure can be formed, and the prepared lubricating grease has excellent oxidation stability, good colloid stability and mechanical stability and can ensure the service life of equipment.
The antibacterial lubricating grease composition disclosed by the invention has good extreme pressure abrasion resistance, can adapt to the working environment of general load, and reduces equipment abrasion;
the antibacterial lubricating grease composition provided by the invention has qualified corrosion and rust resistance, and can protect relevant instrument parts from being corroded in the application process;
the antibacterial lubricating grease composition disclosed by the invention is simple in preparation process, short in production time and capable of realizing industrial mass production.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The antibacterial lubricating grease composition comprises base oil and is characterized by further comprising a thickening agent, a structure promoter and a coupling agent;
the base oil is ether oil or alkyl naphthalene, and the viscosity of the base oil at 100 ℃ is 2-300 mm 2 /s；
The thickening agent is inorganic metal oxide and/or sulfide; the oxide is more than one of titanium dioxide, zinc oxide, magnesium oxide and aluminum oxide; the sulfide is zinc sulfide; the content of the thickening agent is 5-55% of the weight of the antibacterial lubricating grease composition when the thickening agent does not contain a coupling agent; the thickening agent plays a role in thickening in the antibacterial lubricating grease composition system and also enables the antibacterial lubricating grease composition to have excellent antibacterial performance;
the structure promoter is SiO 2 And/or organic bentonite, wherein the content of the structural accelerator is 0.5-10% of the weight of the antibacterial lubricating grease composition when the structural accelerator does not contain a coupling agent;
the coupling agent is a silane coupling agent and/or a titanate coupling agent; the content of the coupling agent is 3-20% of the weight of the thickener;
the antibacterial grease composition has an antibacterial rate of over 99.90 percent on staphylococcus aureus, candida albicans and escherichia coli.
2. The anti-microbial grease composition according to claim 1, wherein the anti-microbial grease composition further comprises an antioxidant.
3. The antibacterial grease composition according to claim 2, wherein the antioxidant is present in an amount of 0.5 to 5% by weight of the antibacterial grease composition when the coupling agent is absent.
4. The antibacterial grease composition according to claim 2 or 3, wherein the antioxidant is one or more of tert-butylphenol, tert-butylphenol derivatives, diphenylamine, naphthylamine and naphthylamine derivatives.
5. The method for preparing the antibacterial lubricating grease composition according to any one of claims 1 to 4, which is characterized in that a thickening agent and a structural modifier are added into base oil to be mixed, then a coupling agent is added to be mixed, and the antibacterial lubricating grease composition is prepared by grinding uniformly.
6. The method for preparing the antibacterial grease composition according to any one of claim 5, which is characterized in that a thickening agent and a structure promoter are added into base oil, mixed and heated to 60-100 ℃, reacted for 20-100 minutes, then heated to 120-180 ℃ after adding a coupling agent, reacted for 20-90 minutes, the material temperature is reduced to below 120 ℃, then an antioxidant is added, and the antibacterial grease composition is obtained after uniform stirring and grinding.
7. The application of the antibacterial lubricating grease composition is characterized in that the antibacterial lubricating grease composition as claimed in any one of claims 1-4 is used for lubrication, sealing and protection of medical equipment.
8. The application of the antibacterial lubricating grease composition is characterized in that the antibacterial lubricating grease composition as claimed in any one of claims 1-4 is used for lubrication, sealing and protection of pharmaceutical preparation equipment.
9. The application of the antibacterial lubricating grease composition is characterized in that the antibacterial lubricating grease composition as claimed in any one of claims 1-4 is used for lubrication, sealing and protection of medical consumable processing machinery.
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