CN109627762A - A kind of non-dusting brush nanometer conductive powder and preparation method thereof - Google Patents
A kind of non-dusting brush nanometer conductive powder and preparation method thereof Download PDFInfo
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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
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
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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
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1477—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing nitrogen
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1483—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing sulfur
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/12—Manufacture of brushes
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- 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
- C08K2003/2231—Oxides; Hydroxides of metals of tin
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
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- C08K2201/001—Conductive additives
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- C08K2201/011—Nanostructured additives
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- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C08L2201/00—Properties
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- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The present invention provides a kind of non-dusting brush nanometer conductive powders and preparation method thereof, under nitrogen protection, six ammonium chloroiridates of mixing, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene；It is then refluxed for stirring 1 hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；The centrifugation of ethyl acetate coagulation is added in cooled to room temperature after reaction 4 hours；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；Polyvinyl alcohol, hydrogen peroxide are added in dispersion, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, 60 DEG C are stirred 2 hours, then uramit is added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is subjected to hypergravity processing；Then it is freeze-dried, obtains nano powder；Brush prepared therefrom has excellent wear-resisting property, heat resistance, while having good electrical property；It can be used for high quality, high request motor, engine.
Description
It is June 20, Shen in 2017 the invention belongs to entitled a kind of non-dusting brush and preparation method thereof, the applying date
Please number be 201710471985.X patent application divisional application.
Technical field
The invention belongs to power tool accessory technical fields, and in particular to a kind of non-dusting brush nanometer conductive powder and its system
Preparation Method.
Background technique
Potentiometer product more particularly to aerospace, weaponry etc. are to dedicated organic solid potentiometer, glass at present
Glaze potentiometer has very strict technical requirements, and the output voltage signal for adjusting potentiometer must be very accurate and reliable, skill
Art requires and the brush of potentiometer is closely related, thus requirement of the potentiometer to brush must simultaneously meet apparent size, resistance,
The requirement of many indexs such as wear-resistant coefficient, compression strength, smoothing factor, collision and vibration.
Brush is divided into soft brush, middle hard brush and hard brush by the soft or hard of material；It is divided by the color of brush
Black electrical brush (being made of pure carbon graphite material) and color brush (being made of the metal materials such as copper and graphite)；By brush material
Difference can be divided into: (1) electrographite brush, (2) electrographite brush, (3) metal-graphite brush.In the prior art, general to use
Carbon, graphite composite powder are base-material, and using resin as adhesives, manufacture brush through kneading, milling, molding and solidification.
Existing brush service performance is poor, and stability is bad, and brush unit pressure is excessively high, and resistance is big, hardness is high, leads to electricity
The abrasion of machine brush aggravates, and unit pressure is too small, and contact is unstable, and commutation ability is poor, is easy to appear mechanical spark；Especially
Wear no resistance, commutation ability is poor, poor anti jamming capability, heat resistance are insufficient, be unable to satisfy high performance motor to the various of brush
It is required that.
Summary of the invention
The present invention provides a kind of non-dusting brushes and preparation method thereof, based on cyanate, polyimides, in conjunction with epoxy
Resin, by the selection compatibility of resin matrix, in conjunction with reasonable preparation process, the brush that extruding pelletization is molded preparation again has excellent
Different wear-resisting property, heat resistance, while there is good electrical property；It can be used for high quality, high request motor, engine.
To achieve the above object of the invention, the present invention adopts the following technical scheme: a kind of preparation method of non-dusting brush, including
Following steps:
(1) ethylene bis stearamide is added in cyanate, 110 DEG C are stirred 5 minutes, and Hostathion, 90 DEG C of stirrings 10 are then added
Minute；Anacardol, 1,8- pungent two mercaptan is added norbornene capped polyimides are added, continue to stir after stirring 30 minutes
2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；Add graphene oxide into epoxy
In resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C are stirred 2 hours, then plus
Enter paraffin, stir 1 hour, polymeric matrix is added, stirs 20 minutes, obtain modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 35000~40000rpm；Concentration
The flow of object is 80~90mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle passes through hot pressing, cutting, polishing, obtains non-dusting brush.
The invention also discloses a kind of nanometer conductive powders and preparation method thereof, include the following steps, under nitrogen protection, mix
Close six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene；It is then refluxed for stirring 1 hour, potassium hydroxide is then added
Ethanol solution and tert-butyl hydroperoxide；The centrifugation of ethyl acetate coagulation is added in cooled to room temperature after reaction 4 hours；It will be from
Resulting dispersion system in ethyl alcohol is scattered in after the washing of heart sediment；Polyvinyl alcohol, hydrogen peroxide, 50 DEG C of stirrings are added in dispersion
5 hours, n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, 60 DEG C are stirred 2 hours, and uramit is then added, and are returned
Stream stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is subjected to hypergravity processing；Then freezing is dry
It is dry, obtain nano powder；The revolving speed of the hypergravity processing is 35000~40000rpm；The flow of concentrate is 80~90mL/
min。
The invention also discloses a kind of polymeric matrixs and preparation method thereof, include the following steps, by ethylene stearic bicine diester
Amine is added in cyanate, and 110 DEG C are stirred 5 minutes, and Hostathion is then added, and 90 DEG C are stirred 10 minutes；It is pungent that anacardol, 1,8- is added
Norbornene capped polyimides are added after stirring 30 minutes in two mercaptan, continue stirring 2 hours, are then added in 115 DEG C
Triethanolamine, stirring obtained polymeric matrix after 15 minutes.
The invention also discloses a kind of brush compositions and preparation method thereof, comprising the following steps:
(1) ethylene bis stearamide is added in cyanate, 110 DEG C are stirred 5 minutes, and Hostathion, 90 DEG C of stirrings 10 are then added
Minute；Anacardol, 1,8- pungent two mercaptan is added norbornene capped polyimides are added, continue to stir after stirring 30 minutes
2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；Add graphene oxide into epoxy
In resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C are stirred 2 hours, then plus
Enter paraffin, stir 1 hour, polymeric matrix is added, stirs 20 minutes, obtain modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 35000~40000rpm；Concentration
The flow of object is 80~90mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition.
The invention also discloses a kind of modified resin systems and preparation method thereof, include the following steps, ethylene is double stearic
Amide is added in cyanate, and 110 DEG C are stirred 5 minutes, and Hostathion is then added, and 90 DEG C are stirred 10 minutes；Anacardol, 1,8- is added
Norbornene capped polyimides are added after stirring 30 minutes in pungent two mercaptan, continue stirring 2 hours, then add in 115 DEG C
Enter triethanolamine, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into epoxy resin, 160 DEG C of stirrings 1 are small
When after methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether is added, 120 DEG C are stirred 2 hours, and paraffin is then added, and are stirred 1 hour, are added
Enter polymeric matrix, stirs 20 minutes, obtain modified resin system.
In above-mentioned technical proposal, pungent two mercaptan of ethylene bis stearamide, cyanate, Hostathion, anacardol, 1,8-, drop ice
Piece alkenyl capped polyimides, triethanolamine, graphene oxide, epoxy resin, methyl silicon sodium alcoholate, aliphatic amine polyoxyethylene ether,
The mass ratio of paraffin is 12: 100: 3: 8: 8: 40: 2: 2: 50: 12: 6: 8；
Six ammonium chloroiridates, triscyclopentadienyl samarium, ethyl alcohol, hexamethylene, potassium hydroxide-ethanol solution, tert-butyl hydroperoxide, gather dioctyl tin
Vinyl alcohol, hydrogen peroxide, n-isopropyl acrylamide, tetraphenylporphyrin iron, uramit mass ratio be 20: 75: 5: 200: 150
:20:15:20:10:12:2:15；
Polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide are for amino
Zinc formate, ethylene vinyl acetate copolymer mass ratio be 5: 3: 32: 100: 2: 11: 2: 15.
In the present invention, the mass concentration of potassium hydroxide is 4% in the potassium hydroxide-ethanol solution；The fatty amine polyoxy
The molecular weight of vinethene is 2500~3500；The molecular weight of the polyvinyl alcohol is 1500~2000.The present invention is poly- by being added
Hydrogen peroxide is added while vinyl alcohol, tetraphenylporphyrin iron is added after mixing, other than increasing conductive powder body surface-active, more
It is important that reduced to the molecular weight of polyvinyl alcohol has certain degradation to the strand of polyvinyl alcohol, this is to rear
After continuous electrical-conductive nanometer powder is mixed with resin, the dispersion performance and the related key of continuous performance for improving metal oxide are helped, especially
It is the influence for avoiding the polyvinyl alcohol of hot property, wear-resisting property difference to overall performance, has given full play to polyvinyl alcohol in conducting powder
Body surface face combines other compounds to improve activity and increases the advantages of compatibility is to embody good electrical properties, it is thus also avoided that its
Participate in the problem of resin body makes heat resistance, wearability decline.
Hot pressing condition of the invention is that 1MPa/155 DEG C of solidification+2MPa/180 DEG C of solidifications 1.5~2.0 in 2.5~3.0 hours are small
When+1.5MPa/230 DEG C solidify 3.5~4.5 hours, increase points three sections with temperature and gradually solidify, the excellent modification of availability
Resin；Unmodified resin elongation percentage is low, brittleness is big, the brush of preparation not endurance, therefore should not use, two allyls of existing addition
Based compound, diamine, epoxy resin will cause the reduction of heat resistance or humidity resistance.Modified epoxy/the cyanate of the present invention/
Under the premise of its heat resistance and unaffected bending modulus, toughness is improved polyimide resin significantly, is especially dropped
Low brush friction cracking risk.
The invention also discloses the product prepared according to above-mentioned preparation method and a kind of motor brush structure, the electricity
Brush configuration includes the brush of above-mentioned preparation method preparation, further includes brushgear housing.
The present invention devises several small molecule compounds other than high performance resin, in conjunction with polymerization technology, poly-
During closing Polymerization induced phase separation, system will form two-arch tunnel structure, and can occur under certain condition opposite
The phenomenon that turning, i.e., forming thermoplastic unit as a small amount of component reaction becomes the auxiliary continuous phase of system.Since reversion phase structure is
Netted continuous phase is constituted by a small amount of thermoplastic unit and is formed, and the mechanical property of system and heat, electrical property are often with master
Based on continuous phase, a small amount of thermoplastic unit is controlled by parameter designing, this structure is conducive to increasing substantially for system performance.
Existing anacardol has certain toughening, plasticization effect, but due to the limitation of structure, so that aathermoset resin system is added
System crosslink density, mechanical property and heat resistance are declined afterwards, have violated the use original intention of high performance heat resistant polymer；Root
According to technical solution of the present invention, there is stronger activity using anacardol, pungent two mercaptan of 1,8-, can first occur with cyanate anti-
It answers, then graft reaction occurs with epoxy resin, inside introduce toughness and heat-resist long-chain and benzene ring structure, play interior
Toughening effect can also reduce hardness, be modified purpose with a definite target in view to matrix resin to reach, and methyl silicon sodium alcoholate with
The combination of aliphatic amine polyoxyethylene ether then avoids excessive flexibility, so that solidfied material is had high heat resistance and mechanical strength, to meet
Brush material heat resistance, workability, rub resistance, water resistance technical requirements.
The present invention uses rare earth modified conductive filler for the first time, manufactures brush material then in conjunction with resin matrix, passes through the change of samarium
Learning activity makes the powder of different properties form uniform network structure with small organic molecule and polymer, is conducive to each constituent element and exists
The interaction of interface and mutually wetting, make entire material system be in the most steady state of thermodynamics, in brush material high temperature work
The carbide and small molecule material matter generated under condition is few, so the heat fading of coefficient of friction is small, particularly, in powder without
Rare earth is added in resin system, rare earth generates sudden strain of a muscle square crystal structure oxide at high temperature and is similar to lamellar graphite, has high temperature
Lubricating action, while avoiding the influence polymerizeing to resin matrix；So that product coefficient of friction of the invention is high and stablizes, and
In conjunction with metal iridium denatured conductive tin-oxide, brush electrical property can be effectively ensured.
The indices of brush practical application influence each other very big, and it is extremely difficult that many index will reach requirement simultaneously, than
Such as say that brush resistance itself is the smaller the better, but resistance is small, intensity is lower with regard to impacted.The kind of brush material, proportion,
Method in dispersing uniformity and process in granularity size, process etc. has influence to technical indicator, solution
Certainly the key of problem is to solve while meeting the scheme of all technical requirement, passes through formula and technique both sides
In conjunction with just can achieve technical effect.
With the implementation of the disabling anti-preparation method of harmful substance (RoHS), an ep-type material not instead of demand becomes
It is generally uniform at a kind of requirement of fundamental property although the regulation of country variant is not quite similar.In existing environmental protection
In type halogen-free material formula composition, it is typically chosen phosphide and makees flame retardant substitution halogen compounds, but use phosphorous flame-retardant material
When material, the inorganic particle that need to usually arrange in pairs or groups just has method by UL-94 test specification, and the inorganic particle arranged in pairs or groups is usually hydroxide
Object, more commonly used hydroxide are silica and aluminium hydroxide respectively, and there are distinct disadvantages when for brush, in addition to shadow
It rings outside electrical property, wear-resisting, heat resistance but will be influenced；The present invention is led by the cooperation between organic matter, such as P elements-modification
The synergistic effect of electric metal limits the usage ratio of several compounds, realizes the halogen-free flameproof of brush, reaches V0 grades.
In the case of volume is smaller and smaller, the speed of service is getting faster, the heat that brush generates is also increasing, these
If heat can not be expelled to external environment in due course, brush assembly of electric will be made to influence the reliability of product because temperature is excessively high and cause
Service life lowers.Therefore, how to radiate at the same improve it is heat-resisting with maintain system stablize running will become more and more important, because
For in the reason of brushgear damages, because high temperature causes the ratio of damage or loss of function for example to vibrate, rub much higher than other
Influence caused by the factors such as wiping；Therefore, it is provided simultaneously with the exploitation of the high heat resistance baseplate material of various demand characteristics, is also brush
Industry one of continual Research Emphasis for a long time.
Epoxy is good with CE resin heat resistance, but brittleness and water imbibition are insufficient, generally by toughening modifying, but can lead
The decline of pyrogenicity performance is obvious, and there are many modified schemes not to refer to substantially only for toughness and heat resistance for the prior art
Wearability and electric conductivity, the more not no report about brush base resin.The present invention passes through triethanolamine and polyphenylene sulfide
Use, increase modified heat convertible resin composition hydrophobic property, in addition also pass through reactive mercapto, amido, triazole
Phosphorus, being introduced into system can make the crosslink density of resin combination decrease, and cooperate polyphenylene sulfide, ethene-vinyl acetate base
Ester copolymer, toughness can increased, so that gained modified resin composition mechanical strength with higher and processing be made to stablize
Property；In addition, having a certain proportion of small molecule compound to will not influence the last crosslinking curing of modified resin as reticular structure, instead
And the generation of low molecular weight condensation polymer can be avoided；Therefore, by several compounds to polyimide resin, epoxy resin and cyanogen
Acid ester resin is modified, and while keeping the heat resistance and intensity of resin, effectively improves humidity resistance and toughness, together
When small molecule reduce the generation of low-molecular-weight polycondensate in thermosetting resin curing process, reduce friction defect and stress lack
It falls into, to a certain degree raising wear-resisting property.
The present invention is in the molecular structure controlled the content of the rigid radicals such as phenyl ring in a certain range by limited proportion, thus
The melt viscosity for reducing resin makes technique processability be improved；And it is kept due to the rigid structure of resin matrix
Good heat resistance, and there is good moisture-proof, anti-flammability and reliability, low in-plane thermal expansion coefficient.It is existing
There is technology epoxy that will play certain catalytic action to curing reaction of cyanate etc., is conducive to improve monomer in solidification process
Conversion ratio, promote the completion of curing reaction；However, that there is reactivities is larger for existing modified resin system, the work phase is short
Manufacturability issues, this can have adverse effect on the mechanical property of resin system, electrical property, practical application.The present invention will
1,8- pungent two mercaptan, zinc dimethyl dithiocarbamate and paraffin are introduced into cyanate/epoxy modified resin, can not only
Enough improve the processing performance of uncured resin, additionally it is possible to improve the mechanics of solidified resin, the performances such as heat-resisting；Ethylene stearic bicine diester
Pungent two mercaptan of amine, 1,8- can be with resin monomer polymerization reaction, to be conducive to certain flexible unit introducing thennosetting curable
In network structure.Chemical chain structure of the invention is conducive to improve the tough of resin material in the case where heat resistance loses small
The performances such as property, electricity, wear-resisting, water-fast, such as boiling water boiling 96 hours, water absorption rate is less than 0.8%.
The invention uses metal composite oxide iridium-tin-samarium oxide nano-particles as conductive material, both
It provides brush excellent electric conductivity, and resin matrix can be promoted to form good network structure, so that it is comprehensive to be conducive to brush
The more cobalt sulfides being added when the raising, especially binding resin pre-polymerization of energy avoid existing carbon material as existing point of conductive agent
It dissipates unevenly, it is bad with resin system compatibility, so that the problem of brush can not preferably reach excellent combination property.It adds simultaneously
A small amount of carbon material can increase stabilization, the patency of conductive network in favor of the special construction of carbon material, further increase brush electricity
Performance.
The present invention carries out resin modified in extrusion for the first time under low temperature, both solved the existing polymerization of fusion method it is uneven,
Easily there is the defect of oligomer, especially by the effect of adding technology and small molecule, solves the existing reaction of extrusion molding
Property is weak and the problem of be not used to a variety of properties different compound high polymer melting mixing；By in thermosetting resin main body
The good thermoplastic resin of hot property is added not only to have improved performed polymer processability but also avoided polymerization excessively, especially thermoplastic resin
The brush that the addition of rouge obtains is easy to polish processing, and mechanical property is good, and electrical property, hot property are still good；By the present invention
The modified resin of preparation for brush preparation after, can with conductive powder body it is good mix and in conjunction with curing process it is available
The good brush product of homogeneous stabilization, performance especially electrical property, hot property, wear-resisting property, flame retardant property.
Since particle diameter is small, large specific surface area, surface energy height, it is easy to reunite, therefore be difficult to evenly spread to
In high molecular material, the methods of existing machinery stirring, mixing, ultrasonic disperse, but dispersion effect is not satisfactory.The present invention is first
The activity that metal iridium improves combined oxidation metal is added, is unfavorable for conductive powder body and resin matrix instead if be not further processed
Mixing, recycle polyvinyl alcohol to handle the surface of particle, while n-isopropyl acrylamide and tetraphenyl be added
PORPHYRIN IRON, carries out that processing is different, and polyvinyl alcohol occurs on a small quantity under certain condition of the present invention from other coupling agents to inorganic filler
Degradation, there are two benefits, first is that avoiding macromolecular chain structure that influence electric conductivity is completely covered on particle, second is that with polyureas first
Aldehyde can increase n-isopropyl acrylamide, the reactivity of composite oxides together, so that particle surface has acitve organic matter,
Especially in the presence of hydrogen peroxide, the exposure level and effect of metal oxide and small molecule compound can be improved；Finally lead to
Hypergravity processing is crossed, thoroughly solves the problems, such as particle aggregation, while retaining particle surface active group.Therefore, the present invention obtains
To electrical-conductive nanometer powder can be effectively improved and receive the agglomeration of particulate, moreover, receiving the functional group on particulate surface can be same
The polymer such as epoxy resin, cyanate, norbornene capped polyimides carry out co-polymeric, substantially increase and receive particulate
Dispersibility and stability in the polymer, from electrical property, heat resistance and wear-resisting property this it appears that.
Specific embodiment
Embodiment one
A kind of preparation method of non-dusting brush, comprising the following steps:
(1) ethylene bis stearamide is added in bisphenol A cyanate, 110 DEG C are stirred 5 minutes, Hostathion are then added, 90 DEG C are stirred
It mixes 10 minutes；Anacardol, 1,8- pungent two mercaptan is added, norbornene capped polyimides are added after stirring 30 minutes, continues
Stirring 2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into
In bisphenol A epoxide resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C of stirrings 2 are small
When, paraffin is then added, stirs 1 hour, polymeric matrix is added, stirs 20 minutes, obtains modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 35000rpm；The stream of concentrate
Amount is 80mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle by hot pressing (hot pressing condition be 1MPa/155 DEG C solidification 2.5 hours+2MPa/180 DEG C
Solidification 2.0 hours+1.5MPa/230 DEG C solidify 4.5 hours), cutting, polishing, obtain non-dusting brush.
Embodiment two
A kind of preparation method of non-dusting brush, comprising the following steps:
(1) ethylene bis stearamide is added in bisphenol A cyanate, 110 DEG C are stirred 5 minutes, Hostathion are then added, 90 DEG C are stirred
It mixes 10 minutes；Anacardol, 1,8- pungent two mercaptan is added, norbornene capped polyimides are added after stirring 30 minutes, continues
Stirring 2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into
In bisphenol A epoxide resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C of stirrings 2 are small
When, paraffin is then added, stirs 1 hour, polymeric matrix is added, stirs 20 minutes, obtains modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 35000rpm；The stream of concentrate
Amount is 90mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle by hot pressing (hot pressing condition be 1MPa/155 DEG C solidification 2.5 hours+2MPa/180 DEG C
Solidification 1.5 hours+1.5MPa/230 DEG C solidify 4.5 hours), cutting, polishing, obtain non-dusting brush.
Embodiment three
A kind of preparation method of non-dusting brush, comprising the following steps:
(1) ethylene bis stearamide is added in bisphenol A cyanate, 110 DEG C are stirred 5 minutes, Hostathion are then added, 90 DEG C are stirred
It mixes 10 minutes；Anacardol, 1,8- pungent two mercaptan is added, norbornene capped polyimides are added after stirring 30 minutes, continues
Stirring 2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into
In bisphenol A epoxide resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C of stirrings 2 are small
When, paraffin is then added, stirs 1 hour, polymeric matrix is added, stirs 20 minutes, obtains modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 40000rpm；The stream of concentrate
Amount is 80mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle by hot pressing (hot pressing condition be 1MPa/155 DEG C solidification 3.0 hours+2MPa/180 DEG C
Solidification 2.0 hours+1.5MPa/230 DEG C solidify 4.5 hours), cutting, polishing, obtain non-dusting brush.
Example IV
A kind of preparation method of non-dusting brush, comprising the following steps:
(1) ethylene bis stearamide is added in Bisphenol F cyanate, 110 DEG C are stirred 5 minutes, Hostathion are then added, 90 DEG C are stirred
It mixes 10 minutes；Anacardol, 1,8- pungent two mercaptan is added, norbornene capped polyimides are added after stirring 30 minutes, continues
Stirring 2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into
In bisphenol A epoxide resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C of stirrings 2 are small
When, paraffin is then added, stirs 1 hour, polymeric matrix is added, stirs 20 minutes, obtains modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 40000rpm；The stream of concentrate
Amount is 90mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle by hot pressing (hot pressing condition be 1MPa/155 DEG C solidification 3.0 hours+2MPa/180 DEG C
Solidification 1.5 hours+1.5MPa/230 DEG C solidify 4.5 hours), cutting, polishing, obtain non-dusting brush.
Embodiment five
A kind of preparation method of non-dusting brush, comprising the following steps:
(1) ethylene bis stearamide is added in bis-phenol E cyanate, 110 DEG C are stirred 5 minutes, Hostathion are then added, 90 DEG C are stirred
It mixes 10 minutes；Anacardol, 1,8- pungent two mercaptan is added, norbornene capped polyimides are added after stirring 30 minutes, continues
Stirring 2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into
In bisphenol A epoxide resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C of stirrings 2 are small
When, paraffin is then added, stirs 1 hour, polymeric matrix is added, stirs 20 minutes, obtains modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 40000rpm；The stream of concentrate
Amount is 80mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle by hot pressing (hot pressing condition be 1MPa/155 DEG C solidification 3.0 hours+2MPa/180 DEG C
Solidification 2.0 hours+1.5MPa/230 DEG C solidify 3.5 hours), cutting, polishing, obtain non-dusting brush.
Embodiment six
A kind of preparation method of non-dusting brush, comprising the following steps:
(1) ethylene bis stearamide is added in bisphenol A cyanate, 110 DEG C are stirred 5 minutes, Hostathion are then added, 90 DEG C are stirred
It mixes 10 minutes；Anacardol, 1,8- pungent two mercaptan is added, norbornene capped polyimides are added after stirring 30 minutes, continues
Stirring 2 hours, then in 115 DEG C of addition triethanolamines, stirring obtained polymeric matrix after 15 minutes；It adds graphene oxide into
In bis-phenol E epoxy resin, 160 DEG C are added methyl silicon sodium alcoholate and aliphatic amine polyoxyethylene ether after stirring 1 hour, and 120 DEG C of stirrings 2 are small
When, paraffin is then added, stirs 1 hour, polymeric matrix is added, stirs 20 minutes, obtains modified resin system；
(2) under nitrogen protection, six ammonium chloroiridates, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene are mixed；It is then refluxed for stirring 1
Hour, potassium hydroxide-ethanol solution and tert-butyl hydroperoxide is then added；Cooled to room temperature after reaction 4 hours is added
The centrifugation of ethyl acetate coagulation；Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；It is added in dispersion poly-
Vinyl alcohol, hydrogen peroxide, 50 DEG C are stirred 5 hours, and n-isopropyl acrylamide, tetraphenylporphyrin iron is then added, and 60 DEG C of stirrings 2 are small
When, uramit is then added, return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is carried out
Hypergravity processing；Then it is freeze-dried, obtains nano powder；The revolving speed of the hypergravity processing is 40000rpm；The stream of concentrate
Amount is 80mL/min；
(3) by polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide generation
It is added in extruder after carbaminate, the dry grinding uniformly of ethylene vinyl acetate copolymer, obtains brush in 175 DEG C of extrusions
Composition particle；Brush composition particle by hot pressing (hot pressing condition be 1MPa/155 DEG C solidification 3.0 hours+2MPa/180 DEG C
Solidification 1.5 hours+1.5MPa/230 DEG C solidify 3.5 hours), cutting, polishing, obtain non-dusting brush.
In the present invention, pungent two mercaptan of ethylene bis stearamide, cyanate, Hostathion, anacardol, 1,8-, norbornene
Capped polyimides, triethanolamine, graphene oxide, epoxy resin, methyl silicon sodium alcoholate, aliphatic amine polyoxyethylene ether, paraffin
Mass ratio is 12: 100: 3: 8: 8: 40: 2: 2: 50: 12: 6: 8；
Six ammonium chloroiridates, triscyclopentadienyl samarium, ethyl alcohol, hexamethylene, potassium hydroxide-ethanol solution, tert-butyl hydroperoxide, gather dioctyl tin
Vinyl alcohol, hydrogen peroxide, n-isopropyl acrylamide, tetraphenylporphyrin iron, uramit mass ratio be 20: 75: 5: 200: 150
:20:15:20:10:12:2:15；
Polytetrafluoroethylene (PTFE), five cobalt sulfides, nano powder, modified resin system, carbon fiber, polyphenylene sulfide, dimethyl disulfide are for amino
Zinc formate, ethylene vinyl acetate copolymer mass ratio be 5: 3: 32: 100: 2: 11: 2: 15.
In the present invention, the mass concentration of potassium hydroxide is 4% in the potassium hydroxide-ethanol solution；The fatty amine polyoxy
The molecular weight of vinethene is 2500~3500；The molecular weight of the polyvinyl alcohol is 1500~2000.
It combines above-mentioned brush with existing brushgear housing to obtain motor brush structure, utilizes 24V speed reducer actual verification, starting
Five Wan Cihou, electricity still run well；2.1~2.2 millimeters of brush wear, 0.71 millimeter of commutator wear.
Comparative example one
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, in step (1) by anacardol,
Pungent two mercaptan of 1,8- replaces with octamethylenediamine.
Comparative example two
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, step is added without three in (1)
Ethanol amine, Hostathion.
Comparative example three
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, step is added without second in (1)
Support bis-stearamides.
Comparative example four
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, centrifugation in step (2)
Object (i.e. metal oxide) changes graphite powder into.
Comparative example five
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, step is added without six in (2)
Ammonium chloroiridate.
Comparative example six
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, it is added without in step (2) double
Oxygen water, tetraphenylporphyrin iron.
Comparative example seven
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, it is added without in step (2) poly-
Ureaformaldehyde；Step is added without polyphenylene sulfide in (3).
Comparative example eight
A kind of preparation method of non-dusting brush, it is consistent with embodiment one, wherein the difference is that, step is added without carbon in (3)
Fiber.
Tg test equipment and condition: 5 DEG C DMA, heating rate/min；Anti-flammability: according to UL94 testing vertical flammability standard
It is judged；CT test equipment and condition: TMA is warming up to 300 DEG C from 25 DEG C of room temperature with the heating rate of 10 DEG C/min, measurement
In-plane thermal expansion coefficient at from 50 DEG C to 130 DEG C；96 hours test water absorption rates of boiling；According to electrical carbon brush physical chemistry
It can test method test electrical property；Universal testing machine tests mechanical property；It is tested in a finishing phase most greatly using existing grinding wheel
Workpiece number；Friction 500 hours, test wear rate.
1 brush of table characterization
Performance characterization two
Claims (4)
1. a kind of preparation method of non-dusting brush nanometer conductive powder, which is characterized in that include the following steps, in nitrogen protection
Under, six ammonium chloroiridates of mixing, dioctyl tin, triscyclopentadienyl samarium, ethyl alcohol and hexamethylene；It is then refluxed for stirring 1 hour, hydrogen-oxygen is then added
Change potassium ethanol solution and tert-butyl hydroperoxide；The centrifugation of ethyl acetate coagulation is added in cooled to room temperature after reaction 4 hours；
Resulting dispersion system in ethyl alcohol is scattered in after centrifugal sediment is washed；The addition polyvinyl alcohol, hydrogen peroxide in dispersion, 50 DEG C
Then n-isopropyl acrylamide, tetraphenylporphyrin iron is added in stirring 5 hours, 60 DEG C are stirred 2 hours, and polyureas first is then added
Aldehyde return stirring 3 hours, is then concentrated to get the concentrate of solid content 80%；Concentrate is subjected to hypergravity processing；Then cold
It is lyophilized dry, obtains nano powder；The revolving speed of the hypergravity processing is 35000~40000rpm；The flow of concentrate be 80~
90mL/min。
2. preparation method according to claim 1, which is characterized in that six ammonium chloroiridate, dioctyl tin, triscyclopentadienyl samarium,
Ethyl alcohol, hexamethylene, potassium hydroxide-ethanol solution, tert-butyl hydroperoxide, polyvinyl alcohol, hydrogen peroxide, n-isopropyl acrylamide,
Tetraphenylporphyrin iron, uramit mass ratio be 20: 75: 5: 200: 150: 20: 15: 20: 10: 12: 2: 15.
3. preparation method according to claim 1, which is characterized in that potassium hydroxide in the potassium hydroxide-ethanol solution
Mass concentration is 4%；The molecular weight of the polyvinyl alcohol is 1500~2000.
4. the non-dusting brush nanometer conductive powder of preparation method preparation according to claim 1.
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| CN108219734A (en) * | 2017-12-11 | 2018-06-29 | 昆山市冠宝化学有限公司 | Furniture single-component polyurethane adhesive and preparation method thereof |
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| CN104999070A (en) * | 2015-06-25 | 2015-10-28 | 合肥蓝科新材料有限公司 | Corrosion-resistant motor carbon brush material doped with nanometer molybdenum powder and preparation method of corrosion-resistant motor carbon brush material |
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| US5182166A (en) * | 1991-05-01 | 1993-01-26 | Burton Ralph A | Wear-resistant composite structure of vitreous carbon containing convoluted fibers |
| JPH0895344A (en) * | 1994-09-29 | 1996-04-12 | Ricoh Co Ltd | Conductive brush and electrifying device using that |
| CN101113239B (en) * | 2007-07-24 | 2011-06-29 | 山东大学 | Polyphenylene sulfide resin/graphite radical conductive composite material and its preparing technique |
| CN105322410B (en) * | 2014-07-10 | 2018-08-17 | 苏州东南碳制品有限公司 | The preparation method of brush used for electric engine of cleaner and the brush prepared by this method |
| CN104693796A (en) * | 2015-03-06 | 2015-06-10 | 苏州欢颜电气有限公司 | Preparation and application of conducting composite material polyaniline/graphene/copper |
| CN106433122A (en) * | 2016-09-07 | 2017-02-22 | 深圳先进技术研究院 | Modified cyanate ester composite material, and preparation method and application thereof |
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|---|---|---|---|---|
| US4119572A (en) * | 1975-11-04 | 1978-10-10 | Georgy Nikolaevich Fridman | Carbon-graphite material for brushes of electric machines and method for preparing same |
| CN1312333A (en) * | 2000-02-25 | 2001-09-12 | 阿尔卑斯电气株式会社 | Conductive resin composition and coded switch using said composition |
| CN104999070A (en) * | 2015-06-25 | 2015-10-28 | 合肥蓝科新材料有限公司 | Corrosion-resistant motor carbon brush material doped with nanometer molybdenum powder and preparation method of corrosion-resistant motor carbon brush material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107118516A (en) | 2017-09-01 |
| CN109354833A (en) | 2019-02-19 |
| CN109486115A (en) | 2019-03-19 |
| CN109517334A (en) | 2019-03-26 |
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Application publication date: 20190416 |