CN109971051A - A kind of preparation method of abrasive rubber sealing material - Google Patents
A kind of preparation method of abrasive rubber sealing material Download PDFInfo
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- CN109971051A CN109971051A CN201910154038.7A CN201910154038A CN109971051A CN 109971051 A CN109971051 A CN 109971051A CN 201910154038 A CN201910154038 A CN 201910154038A CN 109971051 A CN109971051 A CN 109971051A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The present invention relates to a kind of preparation methods of abrasive rubber sealing material, belong to sealing material technical field.The present invention uses carbon black and hydrogenated nitrile-butadiene rubber for raw material, prepare rubber packing material, hydrogenated nitrile-butadiene rubber has good oil resistance, heat resistance, excellent resistance to chemical corrosion, good incompressible set resistant, hydrogenated nitrile-butadiene rubber also has high intensity simultaneously, high tear energy, the features such as wear-resisting property is excellent, the hydrogenated nitrile-butadiene rubber of the carbon black containing nanoparticle is being kneaded and will form microcosmic heterogeneous structure in sulfidation, which includes the biggish rubber macromolecules of locomitivity, the systems such as the lower two-dimensional orientation structure rubber layer of locomitivity and cross-linked macromolecular structure, in the system, the rubber layer of layer structure plays skeleton function, it is connected to elastic phase and macromolecular phase structure, form the reticular structure that filler is combined with macromolecular chain, effectively raise the mechanical property and pressure-resistant performance of sealing material.
Description
Technical field
The present invention relates to a kind of preparation methods of abrasive rubber sealing material, belong to sealing material technical field.
Background technique
The features such as rubber seal products mainly utilize elasticity, osmotic-pressure-tolerant, corrosion resistance and the resistance to ag(e)ing of rubber is come
Achieve the purpose that sealing.The high speed development of industrial technology be sealing technique more stringent requirements are proposed it is wider array of use temperature model
It encloses, high pressure, high speed, high vacuum, high-purity and more complicated fluid media (medium) etc..This also pushed rubber seal products to
The directions such as high-endization, functionalization, high performance are developed.Can sealing article reach above-mentioned target and depend primarily in terms of two: one
It is the design in structure, second is that the improvement on material.
For rubber seal products, as its name suggests, main composition material is in addition to this rubber-base composite material has
It is a little that there are also metals or plastic member, clamping cloth etc..The fluid media (medium) and make that the selection of material of main part depends primarily in sealing system
With the big factor of condition two.The variation of the difference, side group of main chain and the size of molecular weight etc. keep the structure of rubber ever-changing, assign
Rubber diversified performance characteristics, while also determining its purposes.Rubber material used in rubber seal products
Two class of polar rubber and non-polar rubber can be divided into.
Oil sealing is one of Major Members of rubber seal products, and main function is to prevent the oil products such as hydraulic oil, lubricating oil
Leakage.When rubber immerses in oil product, small molecule oil product, which can penetrate into the cross-linked network of rubber, makes its swelling, leads to its power
Performance decline is learned, therefore, oil resistivity is to influence one of the principal element of rubber oil sea quality.The oil such as general hydraulic oil, lubricating oil
The molecular polarity of product is weaker, and according to similar compatibility principle, the bigger rubber of polarity is better to its tolerance.The lower temperature resistance of rubber
It can refer to the ability for keeping every mechanical property under certain low temperature, depend primarily on glass transition and crystallization.Vitrifying
Transformation is the frozen process of polymer segment, at this point, Molecular connectivity indices can not change and enter glassy state.Glass transition temperature
Degree is mainly influenced by strand flexibility, substituent group and configuration, and molecular-chain polarr is bigger, and strand flexibility is poorer, Tg
Higher, resistance to low temperature is also poorer.So oil resistivity and resistance to low temperature are conflicts, to have both two kinds of property simultaneously
The rubber that can need to select that there is specific molecular chain structure, such as polarity segment and soft segment containing proper proportion.It is resistance to low
The preferable polar rubber of warm nature energy mainly has polyurethane rubber, the nitrile rubber of low acrylonitrile content, epichlorohydrin rubber, fluorine silicone rubber
With acrylic rubber etc., for the material for obtaining excellent combination property, long benefit is taken often through chemical modification or blending and modifying
It is short.
Summary of the invention
The technical problems to be solved by the invention: it for the shorter problem of existing rubber packing material service life, provides
A kind of preparation method of abrasive rubber sealing material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) hydrogenated nitrile-butadiene rubber and organic imvite modified ethylene propylene diene rubber are mixed and is placed in double mixed open mills under room temperature
Plasticate 1~2min, the mixed rubber after must plasticating；
(2) graphene oxide, carbon black, silicon carbide, white carbon black and vinyltriethoxysilane are added to the mixing rubber after plasticating
In glue, it is placed in double mixed open mills 10~15min of hot-rolling mixing at 150~160 DEG C, obtains glue stuff compounding；
(3) Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, Triallyl isocyanurate and glue stuff compounding is placed in vulcanizing press
Middle vulcanization 20~25min, 14~16h of room temperature obtain abrasive rubber sealing material.
The hydrogenated nitrile-butadiene rubber, organic imvite modified ethylene propylene diene rubber, carbon black, silicon carbide, graphene oxide,
The parts by weight of white carbon black, vinyltriethoxysilane, Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, Triallyl isocyanurate
For 180~200 parts of hydrogenated nitrile-butadiene rubbers, 60~80 parts of organic imvite modified ethylene propylene diene rubbers, 40~50 parts of carbon blacks, 40~
50 parts of silicon carbide, 20~30 parts of graphene oxides, 10~20 parts of white carbon blacks, 5~10 parts of vinyltriethoxysilane, 3~5 parts
Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, 3~5 parts of Triallyl isocyanurates.
Conditions of vulcanization described in step (3) is 150~160 DEG C of curing temperature, 13~15MPa of sulfide stress.
The specific preparation step of organic imvite modified ethylene propylene diene rubber described in step (1) are as follows:
(1) ethylene propylene diene rubber, organo montmorillonite are placed in mixer, 8~10min are kneaded at 120~140 DEG C, kept the temperature,
Obtain ethylene propylene diene rubber mixture；
(2) zinc oxide, stearic acid, sulphur and 2-steryl benzothiazole are added in ethylene propylene diene rubber mixture, 120~
140 DEG C of 10~12min of mixing, discharging, obtain rubber composition；
(3) rubber composition is stood 22 after two-roll mill suppresses flakiness at normal temperature~for 24 hours, it is thin to obtain rubber composition
Piece；
(4) rubber composition thin slice is put into mold, is placed in 10~12min of vulcanization on vulcanizing press, is down to room temperature, shears
At fritter, organic imvite modified ethylene propylene diene rubber is obtained.
The ethylene propylene diene rubber, organo montmorillonite, zinc oxide, stearic acid, sulphur, the weight of 2-steryl benzothiazole
Amount part is 80~100 parts of ethylene propylene diene rubbers, 10~20 parts of organo montmorillonites, 1~3 part of zinc oxide, 4~6 parts of stearic acid, 3~5
Part sulphur, 0.5~1.5 part of 2-steryl benzothiazole.
The specific surface area of organo montmorillonite described in step (1) is 750m2/g, diameter/thickness rate is 200.
Conditions of vulcanization described in step (4) is 150~160 DEG C of curing temperature, 13~15MPa of sulfide stress.
The specific preparation step of graphene oxide described in step (2) are as follows:
(1) graphite powder, sodium nitrate are added in sulfuric acid, 10~15min are stirred with 200~300r/min revolving speed in 0 DEG C of ice water,
Obtain mixture；
(2) potassium permanganate is slowly added in mixture, 10~15min of time is added, magnetic agitation is reacted under 0 DEG C of ice-water bath
4~6h obtains reactant；
(3) by reactant be added deionized water in, under 75~85 DEG C of water-baths with 250~350r/min revolving speed stirring 15~
20min, is slowly added dropwise hydrogen peroxide, and 10~15min of time for adding obtains mixed reaction solution；
(4) mixed reaction solution is filtered, takes solid, with salt acid elution 3~5 times of mass concentration 1%, then it is washed with deionized water 5~
7 times, with 8000~8500r/min revolving speed 30~40min of high speed centrifugation, lower layer's solid is taken, is placed in bag filter and dialyses 6~8 days,
Freeze-drying, obtains graphene oxide.
The graphite powder, sulfuric acid, sodium nitrate, potassium permanganate, deionized water, the parts by weight of hydrogen peroxide are 5~10 parts of stones
Ink powder, the sulfuric acid of 100~120 parts of mass concentrations 50%, 4~6 parts of sodium nitrate, 10~15 parts of potassium permanganate, 180~200 parts go from
The hydrogen peroxide of sub- water, 10~15 parts of mass concentrations 30%.
Dialysis bag retention molecular weight described in step (4) is 8000-14000.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention, by addition carbon black, silicon carbide and white carbon black, prepares rubber seal material using hydrogenated nitrile-butadiene rubber as raw material
Material, hydrogenated nitrile-butadiene rubber have good oil resistance, and since hydrogenated nitrile-butadiene rubber has HI SA highly saturated structure, make its tool
Good heat resistance, excellent resistance to chemical corrosion, good incompressible set resistant, while hydrogenated nitrile-butadiene rubber is also
With high intensity, high tear energy, the features such as wear-resisting property is excellent, the hydrogenated nitrile-butadiene rubber of the carbon black containing nanoparticle being kneaded and
It will form microcosmic heterogeneous structure in sulfidation, which includes the biggish rubber macromolecule of locomitivity, locomitivity is lower
Two-dimensional orientation structure rubber layer and the systems such as cross-linked macromolecular structure, in the system, the rubber layer of layer structure plays bone
Frame effect, it is connected to elastic phase and macromolecular phase structure, forms the reticular structure that filler is combined with macromolecular chain, effectively
The mechanical property and resistance to pressure for improving sealing material, there are the groups such as hydroxyl and hydrogen, these groups on silicon carbide powder surface
Physics chemical action can be formed with the silicon oxygen bond in the reactive functional groups and white carbon black in hydrogenated nitrile-butadiene rubber, can effectively mentioned
The resistance to pressure of high rubber packing material, and the large specific surface area of silicon carbide and white carbon black, adhesion strength with super strength, while hard charcoal
It is black that also there is tear-proof and heat-resisting anti-aging property, the various performances of rubber packing material can be effectively improved, to effectively mention
The service life of high rubber packing material；
(2) present invention prepares abrasive rubber sealing material, organic illiteracy is de- by adding organic imvite modified ethylene propylene diene rubber
Soil is that smectite clay is delaminated layered silicate material made of dispersion, purifying modified, super-fine classified, special organic composite,
With good dispersion performance, polymer material can be applied to, to improve the impact resistance, fatigue resistance, size of polymer
Stability, gas barrier property and ageing-resistant performance etc. change simultaneously to play the role of enhancing polymer comprehensive physical performance
Be apt to its processing performance, due to organo montmorillonite be carry out ion exchange organic-treating using organic cation and montmorillonite and
, the montmorillonite layer spacing after organising increases, and interlaminar action power weakens, and montmorillonite layer surface becomes oleophylic from hydrophily
Property, surface can reduce, and when being blended with ethylene propylene diene rubber, ethylene propylene diene rubber can easily intercalation enter in lamella,
Lamella is strutted, to obtain the modified EPT rubber material of nano-dispersion, modified EPT rubber material is not only
With preferably mechanical property, and exhibit improvements over the pressure-resistant performance and ageing-resistant performance of common ethylene propylene diene rubber；
(3) present invention prepares abrasive rubber sealing material, since graphite oxide itself has stratiform by addition graphene oxide
Structure, the oxygen-containing functional group on lamella can generate the substances such as water and carbon dioxide at high temperature under high pressure, be a kind of quasi- two again
The restricted structure of dimension, elastomeric polymer molecule can be bound in its interlayer, limit the free movement of strand and segment, because
The mechanical property of abrasive rubber sealing material, heat resistance, resistance to pressure and wearability can be improved in this.
Specific embodiment
According to parts by weight, 5~10 parts of graphite powders, the sulfuric acid of 100~120 parts of mass concentrations 50%, 4~6 parts are weighed respectively
Sodium nitrate, 10~15 parts of potassium permanganate, 180~200 parts of deionized waters, 10~15 parts of mass concentrations 30% hydrogen peroxide, by graphite
Powder, sodium nitrate are added in sulfuric acid, stir 10~15min in 0 DEG C of ice water with 200~300r/min revolving speed, obtain mixture, will be high
Potassium manganate is slowly added in mixture, and 10~15min of time is added, and magnetic agitation reacts 4~6h under 0 DEG C of ice-water bath, is obtained instead
Object is answered, reactant is added in deionized water, 15~20min is stirred with 250~350r/min revolving speed under 75~85 DEG C of water-baths,
Hydrogen peroxide is slowly added dropwise, 10~15min of time for adding obtains mixed reaction solution, mixed reaction solution is filtered, take solid, uses quality
The salt acid elution of concentration 1% 3~5 times, then be washed with deionized water 5~7 times, with 8000~8500r/min revolving speed high speed centrifugation 30~
40min takes lower layer's solid, is placed in bag filter and dialyses 6~8 days, and dialysis bag retention molecular weight is 8000~14000, and freezing is dry
It is dry, graphene oxide is obtained, then according to parts by weight, it is de- to weigh 80~100 parts of ethylene propylene diene rubbers, 10~20 parts of organic illiteracies respectively
Soil, 1~3 part of zinc oxide, 4~6 parts of stearic acid, 3~5 parts of sulphur, 0.5~1.5 part of 2-steryl benzothiazole, by EPDM
Rubber, organo montmorillonite are placed in mixer, and 8~10min is kneaded at 120~140 DEG C, and it is mixed to obtain ethylene propylene diene rubber for heat preservation
Object is refined, zinc oxide, stearic acid, sulphur and 2-steryl benzothiazole are added in ethylene propylene diene rubber mixture, 120~
140 DEG C of 10~12min of mixing, discharging, obtain rubber composition, by rubber composition normal after two-roll mill suppresses flakiness
Warm standing 22 down~for 24 hours, rubber composition thin slice is obtained, rubber composition thin slice is put into mold, is placed on vulcanizing press,
Under 150~160 DEG C, the conditions of vulcanization of 13~15MPa, vulcanizes 10~12min, be down to room temperature, cut into fritter, obtain organic illiteracy
De- land reform ethylene propylene diene rubber, then according to parts by weight, weigh respectively 180~200 parts of hydrogenated nitrile-butadiene rubbers, 60~80 parts have
The imvite modified ethylene propylene diene rubber of machine, 40~50 parts of carbon blacks, 40~50 parts of silicon carbide, 20~30 parts of graphene oxides, 10~
20 parts of white carbon blacks, 5~10 parts of vinyltriethoxysilane, 3~5 parts of Isosorbide-5-Nitraes-dual-tert-butyl peroxy isopropyl base benzene, 3~5 part three
Hydrogenated nitrile-butadiene rubber and organic imvite modified ethylene propylene diene rubber are mixed and are placed on double mixed mills by allyl iso cyanurate
Plasticate under room temperature 1~2min in machine, the mixed rubber after must plasticating, by graphene oxide, carbon black, silicon carbide, white carbon black and second
Alkenyl triethoxysilane is added in the mixed rubber after plasticating, and is placed in the hot-rolling mixing at 150~160 DEG C in double mixed open mills
10~15min obtains glue stuff compounding, by Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, Triallyl isocyanurate and glue stuff compounding
It is placed in vulcanizing press, 20~25min, room temperature is vulcanized with 2mm drawing sheet under conditions of 150~160 DEG C, 13~15MPa
14~16h is placed, abrasive rubber sealing material is obtained.
According to parts by weight, sulfuric acid, the 4 parts of sodium nitrate, 10 parts of 5 parts of graphite powders, 100 parts of mass concentrations 50% are weighed respectively
The hydrogen peroxide of potassium permanganate, 180 parts of deionized waters, 10 parts of mass concentrations 30% graphite powder, sodium nitrate is added in sulfuric acid, 0
10min is stirred with 200r/min revolving speed in DEG C ice water, mixture is obtained, potassium permanganate is slowly added in mixture, the time is added
10min, magnetic agitation reacts 4h under 0 DEG C of ice-water bath, obtains reactant, reactant is added in deionized water, in 75 DEG C of water-baths
Under 15min stirred with 250r/min revolving speed, hydrogen peroxide is slowly added dropwise, time for adding 10min obtains mixed reaction solution, will mixing it is anti-
It answers liquid to filter, takes solid, with salt acid elution 3 times of mass concentration 1%, then be washed with deionized water 5 times, it is high with 8000r/min revolving speed
Speed centrifugation 30min, takes lower layer's solid, is placed in bag filter and dialyses 6 days, and dialysis bag retention molecular weight 8000, freeze-drying obtains
Graphene oxide, then according to parts by weight, 80 parts of ethylene propylene diene rubbers, 10 parts of organo montmorillonites, 1 part of zinc oxide, 4 are weighed respectively
Ethylene propylene diene rubber, organo montmorillonite are placed in mixer by part stearic acid, 3 parts of sulphur, 0.5 part of 2-steryl benzothiazole,
It is kneaded 8min at 120 DEG C, keeps the temperature, ethylene propylene diene rubber mixture is obtained, by zinc oxide, stearic acid, sulphur and 2- mercapto alcohol radical benzene
And thiazole is added in ethylene propylene diene rubber mixture, in 120 DEG C of mixing 10min, discharging obtains rubber composition, by rubber mix
Object stands 22h after two-roll mill suppresses flakiness at normal temperature, obtains rubber composition thin slice, rubber composition thin slice is put
Enter in mold, be placed on vulcanizing press, under 150 DEG C, the conditions of vulcanization of 13MPa, vulcanizes 10min, be down to room temperature, cut into
Fritter obtains organic imvite modified ethylene propylene diene rubber, then according to parts by weight, weighs 180 parts of hydrogenated nitrile-butadiene rubbers, 60 respectively
The organic imvite modified ethylene propylene diene rubber of part, 40 parts of carbon blacks, 40 parts of silicon carbide, 20 parts of graphene oxides, 10 parts of white carbon blacks, 5
Part vinyltriethoxysilane, 3 parts of Isosorbide-5-Nitraes-dual-tert-butyl peroxy isopropyl base benzene, 3 parts of Triallyl isocyanurates, will hydrogenate
Nitrile rubber and the mixing of organic imvite modified ethylene propylene diene rubber are placed in double mixed open mills the 1min that plasticates under room temperature, must mould
Mixed rubber after refining, after the addition of graphene oxide, carbon black, silicon carbide, white carbon black and vinyltriethoxysilane is plasticated
Mixed rubber in, be placed in double mixed open mills that hot-rolling is kneaded 10min at 150 DEG C, glue stuff compounding obtained, by Isosorbide-5-Nitrae-dual-tert-butyl
Peroxy isopropyl base benzene, Triallyl isocyanurate and glue stuff compounding are placed in vulcanizing press, in 150 DEG C, the condition of 13MPa
Under 20min vulcanized with 2mm drawing sheet, room temperature 14h obtains abrasive rubber sealing material.
According to parts by weight, sulfuric acid, the 5 parts of sodium nitrate, 12 parts of 8 parts of graphite powders, 110 parts of mass concentrations 50% are weighed respectively
The hydrogen peroxide of potassium permanganate, 190 parts of deionized waters, 12 parts of mass concentrations 30% graphite powder, sodium nitrate is added in sulfuric acid, 0
12min is stirred with 250r/min revolving speed in DEG C ice water, mixture is obtained, potassium permanganate is slowly added in mixture, the time is added
12min, magnetic agitation reacts 5h under 0 DEG C of ice-water bath, obtains reactant, reactant is added in deionized water, in 80 DEG C of water-baths
Under 18min stirred with 300r/min revolving speed, hydrogen peroxide is slowly added dropwise, time for adding 12min obtains mixed reaction solution, will mixing it is anti-
It answers liquid to filter, takes solid, with salt acid elution 4 times of mass concentration 1%, then be washed with deionized water 6 times, it is high with 8250r/min revolving speed
Speed centrifugation 35min, takes lower layer's solid, is placed in bag filter and dialyses 7 days, dialysis bag retention molecular weight 11000, freeze-drying,
Graphene oxide is obtained, then according to parts by weight, weighs 90 parts of ethylene propylene diene rubbers, 15 parts of organo montmorillonites, 2 parts of oxidations respectively
Ethylene propylene diene rubber, organo montmorillonite are placed in mixing by zinc, 5 parts of stearic acid, 4 parts of sulphur, 1.0 parts of 2-steryl benzothiazole
In machine, it is kneaded 9min at 130 DEG C, keeps the temperature, ethylene propylene diene rubber mixture is obtained, by zinc oxide, stearic acid, sulphur and 2- mercapto alcohol
Base benzothiazole is added in ethylene propylene diene rubber mixture, and in 130 DEG C of mixing 11min, discharging obtains rubber composition, by rubber
Mixture stands 23h after two-roll mill suppresses flakiness at normal temperature, obtains rubber composition thin slice, and rubber composition is thin
Piece is put into mold, is placed on vulcanizing press, under 155 DEG C, the conditions of vulcanization of 14MPa, is vulcanized 11min, is down to room temperature, cuts
It is cut into small pieces, obtains organic imvite modified ethylene propylene diene rubber, then according to parts by weight, weighs 190 parts of hydrogenated butyronitrile rubbers respectively
Glue, 70 parts of organic imvite modified ethylene propylene diene rubbers, 45 parts of carbon blacks, 45 parts of silicon carbide, 25 parts of graphene oxides, 15 parts of hard charcoals
Black, 8 parts of vinyltriethoxysilane, 4 parts of Isosorbide-5-Nitraes-dual-tert-butyl peroxy isopropyl base benzene, 4 parts of Triallyl isocyanurates, will
Hydrogenated nitrile-butadiene rubber and the mixing of organic imvite modified ethylene propylene diene rubber are placed in double mixed open mills the 1min that plasticates under room temperature,
Graphene oxide, carbon black, silicon carbide, white carbon black and vinyltriethoxysilane are added and mould by the mixed rubber after must plasticating
In mixed rubber after refining, it is placed in double mixed open mills the hot-rolling mixing 12min at 155 DEG C, glue stuff compounding is obtained, by the bis- uncles of Isosorbide-5-Nitrae-
Butylperoxyisopropyl benzene, Triallyl isocyanurate and glue stuff compounding are placed in vulcanizing press, in 155 DEG C, 14MPa
Under the conditions of 22min vulcanized with 2mm drawing sheet, room temperature 15h obtains abrasive rubber sealing material.
According to parts by weight, sulfuric acid, the 6 parts of sodium nitrate, 15 parts of 10 parts of graphite powders, 120 parts of mass concentrations 50% are weighed respectively
The hydrogen peroxide of potassium permanganate, 200 parts of deionized waters, 15 parts of mass concentrations 30% graphite powder, sodium nitrate is added in sulfuric acid, 0
15min is stirred with 300r/min revolving speed in DEG C ice water, mixture is obtained, potassium permanganate is slowly added in mixture, the time is added
15min, magnetic agitation reacts 6h under 0 DEG C of ice-water bath, obtains reactant, reactant is added in deionized water, in 85 DEG C of water-baths
Under 20min stirred with 350r/min revolving speed, hydrogen peroxide is slowly added dropwise, time for adding 15min obtains mixed reaction solution, will mixing it is anti-
It answers liquid to filter, takes solid, with salt acid elution 5 times of mass concentration 1%, then be washed with deionized water 7 times, it is high with 8500r/min revolving speed
Speed centrifugation 40min, takes lower layer's solid, is placed in bag filter and dialyses 8 days, dialysis bag retention molecular weight 14000, freeze-drying,
Graphene oxide is obtained, then according to parts by weight, weighs 100 parts of ethylene propylene diene rubbers, 20 parts of organo montmorillonites, 3 parts of oxidations respectively
Ethylene propylene diene rubber, organo montmorillonite are placed in mixing by zinc, 6 parts of stearic acid, 5 parts of sulphur, 1.5 parts of 2-steryl benzothiazole
In machine, it is kneaded 10min at 140 DEG C, keeps the temperature, ethylene propylene diene rubber mixture is obtained, by zinc oxide, stearic acid, sulphur and 2- mercapto
Alcohol radical benzothiazole is added in ethylene propylene diene rubber mixture, and in 140 DEG C of mixing 12min, discharging obtains rubber composition, by rubber
Glue mixture is stood for 24 hours at normal temperature after two-roll mill suppresses flakiness, rubber composition thin slice is obtained, by rubber composition
Thin slice is put into mold, is placed on vulcanizing press, under 160 DEG C, the conditions of vulcanization of 15MPa, is vulcanized 12min, is down to room temperature,
Fritter is cut into, obtains organic imvite modified ethylene propylene diene rubber, then according to parts by weight, weighs 200 parts of hydrogenated butyronitriles respectively
Rubber, 80 parts of organic imvite modified ethylene propylene diene rubbers, 50 parts of carbon blacks, 50 parts of silicon carbide, 30 parts of graphene oxides, 20 parts it is white
Carbon black, 10 parts of vinyltriethoxysilane, 5 parts of Isosorbide-5-Nitraes-dual-tert-butyl peroxy isopropyl base benzene, 5 parts of triallyl isocyanuric acids
Hydrogenated nitrile-butadiene rubber and organic imvite modified ethylene propylene diene rubber are mixed to be placed in double mixed open mills under room temperature and be plasticated by ester
2min, the mixed rubber after must plasticating, graphene oxide, carbon black, silicon carbide, white carbon black and vinyltriethoxysilane are added
Enter in the mixed rubber after plasticating, is placed in double mixed open mills the hot-rolling mixing 15min at 160 DEG C, glue stuff compounding is obtained, by Isosorbide-5-Nitrae-
Dual-tert-butyl peroxy isopropyl base benzene, Triallyl isocyanurate and glue stuff compounding are placed in vulcanizing press, 160 DEG C,
25min is vulcanized with 2mm drawing sheet under conditions of 15MPa, room temperature 16h obtains abrasive rubber sealing material.
Reference examples: the rubber packing material of Dongguan company production.
The rubber packing material that example and reference examples are prepared is detected, specific detection is as follows:
Tensile property: it provides to carry out according to GB/T528-2009.Using universal sampling machine by sealing material be tailored into 75mm ×
The dumbbell-shaped specimen of 12.5mm × 2mm, the tensile speed of universal tensile testing machine are 500mm/min, every group sample testing 5,
Take its average value as test result.
Tearing strength: it is tested according to the square sample in GB/T529-2009.
Specific test result such as table 1.
1 performance characterization contrast table of table
| Detection project | Example 1 | Example 2 | Example 3 | Reference examples |
| Tensile strength/MPa | 12.0 | 12.5 | 12.9 | 6.7 |
| Elongation at break/% | 520 | 515 | 512 | 198 |
| Tearing strength/kN/m | 60 | 61 | 65 | 23 |
As shown in Table 1, rubber packing material prepared by the present invention has good mechanical property, has longer service life.
Claims (10)
1. a kind of preparation method of abrasive rubber sealing material, which is characterized in that specific preparation step are as follows:
(1) hydrogenated nitrile-butadiene rubber and organic imvite modified ethylene propylene diene rubber are mixed and is placed in double mixed open mills under room temperature
Plasticate 1~2min, the mixed rubber after must plasticating；
(2) graphene oxide, carbon black, silicon carbide, white carbon black and vinyltriethoxysilane are added to the mixing rubber after plasticating
In glue, it is placed in double mixed open mills 10~15min of hot-rolling mixing at 150~160 DEG C, obtains glue stuff compounding；
(3) Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, Triallyl isocyanurate and glue stuff compounding is placed in vulcanizing press
Middle vulcanization 20~25min, 14~16h of room temperature obtain abrasive rubber sealing material.
2. a kind of preparation method of abrasive rubber sealing material according to claim 1, which is characterized in that the hydrogenation
Nitrile rubber, organic imvite modified ethylene propylene diene rubber, carbon black, silicon carbide, graphene oxide, white carbon black, three second of vinyl
Oxysilane, Isosorbide-5-Nitrae-dual-tert-butyl peroxy isopropyl base benzene, Triallyl isocyanurate parts by weight be 180~200 parts hydrogenation
Nitrile rubber, 60~80 parts of organic imvite modified ethylene propylene diene rubbers, 40~50 parts of carbon blacks, 40~50 parts of silicon carbide, 20~
30 parts of graphene oxides, 10~20 parts of white carbon blacks, 5~10 parts of vinyltriethoxysilane, 3~5 parts of Isosorbide-5-Nitraes-dual-tert-butyl mistake
Oxygen cumene, 3~5 parts of Triallyl isocyanurates.
3. a kind of preparation method of abrasive rubber sealing material according to claim 1, which is characterized in that step (3) institute
The conditions of vulcanization stated is 150~160 DEG C of curing temperature, 13~15MPa of sulfide stress.
4. a kind of preparation method of abrasive rubber sealing material according to claim 1, which is characterized in that step (1) institute
The specific preparation step for the organic imvite modified ethylene propylene diene rubber stated are as follows:
(1) ethylene propylene diene rubber, organo montmorillonite are placed in mixer, 8~10min are kneaded at 120~140 DEG C, kept the temperature,
Obtain ethylene propylene diene rubber mixture；
(2) zinc oxide, stearic acid, sulphur and 2-steryl benzothiazole are added in ethylene propylene diene rubber mixture, 120~
140 DEG C of 10~12min of mixing, discharging, obtain rubber composition；
(3) rubber composition is stood 22 after two-roll mill suppresses flakiness at normal temperature~for 24 hours, it is thin to obtain rubber composition
Piece；
(4) rubber composition thin slice is put into mold, is placed in 10~12min of vulcanization on vulcanizing press, is down to room temperature, shears
At fritter, organic imvite modified ethylene propylene diene rubber is obtained.
5. a kind of preparation method of abrasive rubber sealing material according to claim 4, which is characterized in that the ternary
EP rubbers, organo montmorillonite, zinc oxide, stearic acid, sulphur, the parts by weight of 2-steryl benzothiazole are 80~100 part three
First EP rubbers, 10~20 parts of organo montmorillonites, 1~3 part of zinc oxide, 4~6 parts of stearic acid, 3~5 parts of sulphur, 0.5~1.5 part
2-steryl benzothiazole.
6. a kind of preparation method of abrasive rubber sealing material according to claim 4, which is characterized in that step (1) institute
The specific surface area for the organo montmorillonite stated is 750m2/g, diameter/thickness rate is 200.
7. a kind of preparation method of abrasive rubber sealing material according to claim 4, which is characterized in that step (4) institute
The conditions of vulcanization stated is 150~160 DEG C of curing temperature, 13~15MPa of sulfide stress.
8. a kind of preparation method of abrasive rubber sealing material according to claim 1, which is characterized in that step (2) institute
The specific preparation step for the graphene oxide stated are as follows:
(1) graphite powder, sodium nitrate are added in sulfuric acid, 10~15min are stirred with 200~300r/min revolving speed in 0 DEG C of ice water,
Obtain mixture；
(2) potassium permanganate is slowly added in mixture, 10~15min of time is added, magnetic agitation is reacted under 0 DEG C of ice-water bath
4~6h obtains reactant；
(3) by reactant be added deionized water in, under 75~85 DEG C of water-baths with 250~350r/min revolving speed stirring 15~
20min, is slowly added dropwise hydrogen peroxide, and 10~15min of time for adding obtains mixed reaction solution；
(4) mixed reaction solution is filtered, takes solid, with salt acid elution 3~5 times of mass concentration 1%, then it is washed with deionized water 5~
7 times, with 8000~8500r/min revolving speed 30~40min of high speed centrifugation, lower layer's solid is taken, is placed in bag filter and dialyses 6~8 days,
Freeze-drying, obtains graphene oxide.
9. a kind of preparation method of abrasive rubber sealing material according to claim 8, which is characterized in that the graphite
Powder, sulfuric acid, sodium nitrate, potassium permanganate, deionized water, the parts by weight of hydrogen peroxide are 5~10 parts of graphite powders, 100~120 parts of quality
The sulfuric acid of concentration 50%, 4~6 parts of sodium nitrate, 10~15 parts of potassium permanganate, 180~200 parts of deionized waters, 10~15 parts of quality are dense
The hydrogen peroxide of degree 30%.
10. a kind of preparation method of abrasive rubber sealing material according to claim 8, which is characterized in that step (4) institute
The dialysis bag retention molecular weight stated is 8000-14000.
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| CN110790992A (en) * | 2019-12-19 | 2020-02-14 | 苏州中可欣电子科技有限公司 | Super-elastic rubber material |
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