CN110373085A - A kind of surface of steel workpiece Special electromagnetic shielding coating - Google Patents
A kind of surface of steel workpiece Special electromagnetic shielding coating Download PDFInfo
- Publication number
- CN110373085A CN110373085A CN201910505867.5A CN201910505867A CN110373085A CN 110373085 A CN110373085 A CN 110373085A CN 201910505867 A CN201910505867 A CN 201910505867A CN 110373085 A CN110373085 A CN 110373085A
- Authority
- CN
- China
- Prior art keywords
- parts
- electromagnetic shielding
- steel workpiece
- shielding coating
- special electromagnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
-
- 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of surface of steel workpiece Special electromagnetic shielding coatings, belong to technical field of function materials.The present invention is according to parts by weight, by 20~30 parts of hollow carbon fibers, 0.2~0.3 part of yeast powder, 3~5 parts of starch, 20~30 parts of water mixing ultrasounds, then mixed fermentation, then 0.01~0.02 times of hollow carbon fiber quality of amylase and 0.01~0.02 times of hollow carbon fiber quality of iron chloride is added dropwise, filtering, high-temperature process is to get modified hollow carbon fiber；By epoxy resin, diluent, curing agent, modified filler, modified hollow carbon fiber, silver-coated copper powder, polyacrylic acid zinc resin, silane coupling agent and dispersing agent are stirred to get surface of steel workpiece Special electromagnetic shielding coating.Surface of steel workpiece Special electromagnetic shielding coating provided by the invention has excellent resistance to neutral salt spray performance.
Description
Technical field
The invention discloses a kind of surface of steel workpiece Special electromagnetic shielding coatings, belong to technical field of function materials.
Background technique
Electro Magnetic Compatibility (Electromagnetic Compatibility) abbreviation EMC, just refers to certain electronic equipment neither
Other equipment are interfered, while also not being influenced by other equipment.Electro Magnetic Compatibility is to produce as our known safeties
One of most important index of quality.Safety is related to the person and property, and Electro Magnetic Compatibility is then related to the person and environmental protection.
Electronic component is to extraneous interference, referred to as EMI；Electromagnetic wave can be acted on electronic component, generated disturbed phenomenon, claimed
For EMS.For example, " snowflake " common on TV fluorescent screen, just indicates that the signal received is disturbed.
Electromagnetic shielding is in some region of space, to weaken the measure of the field strength as caused by certain sources.In the overwhelming majority
In the case of, shield can be made of metals such as copper, aluminium, steel, but for constant and ultra low yield point steel, the materials such as ferrite can also be used
Material is used as shield.In a system or often electromagnetic noise or interference can not be generated between homologous ray and system performance is caused to be disliked
Change, therefore it is required that, 1. within a certain area by power line or magnetic line of force limitation；2. making a certain region not by external power line and magnetic
The influence of the line of force.In recent years, various logical with the fast development of the development of modern science and technology, especially electronic information industry
Becoming increasingly popular for equipment of news provides great convenience for our daily lifes.But these equipment also produce while work
Raw more and more radiation pollutions.Electromagnetic interference not only the electron equipment, especially precise electronic that electromagnetic radiation pollution generates
The normal use of instrument, which is brought, to be seriously affected, and ubiquitous electromagnetic pollution environment returns the especially teen-age body of people
Heart health brings harm.Therefore the research of electromagnetic shielding material just seems ever more important.Electromagnetic shielding material is exactly to utilize material
The mechanism such as reflection, absorption or the counteracting of material prevent electromagnetic energy caused by radiation field source from entering by shielding area, thus effectively
Eliminate or reduce influence of the electromagnetic environment to relevant device and the harm to human health.
At present application more electromagnetic shielding material be composite electromagnetic shielding coating, composition be mainly film-forming resin,
Conductive filler, diluent etc., wherein conductive filler is important component part, and there are commonly silver powder, copper powder, nickel powder, wicker coppers
Powder, carbon black, carbon nanotube etc..Nickel coated copper powder is conductive silicon rubber optimal conducting filler at present, outstanding electric conductivity
With electromagnetic wave shielding performance, have in conductive rubber hot forming it is good anti-oxidant, various environment corrosion resistancies (salt fog examination
Test) there is quite long service life, guarantee that the qualification rate of product is very.In cost such as than silver-plated class product: at present
Silver-plated glass beads and fine silver powder, with the powerful advantage in cost.Do not cause because of the rising of silver-colored valence unstable for valence.Nickel
Copper-clad have for valence stability it is suitable, be end come conductive silicon rubber leading powder filler.
And the electricity for having excellent scale effect and conventional material incomparable as the nano material of representative using carbon nanotube
Magnetic performance shows excellent performance in terms of conductive and electromagnetic shielding, therefore take carbon nanotube as the electricity of basic filler
The research and development of magnetic screen coating is increasingly taken seriously.The shortcomings that existing electromagnetic screen coating is primarily present has: attachment
Power is poor, shield effectiveness is poor, curing time is long, harmful to environment, is not able to satisfy the requirement of engineer application.
Summary of the invention
The present invention solves the technical problem of: for the resistance to neutrality of traditional surface of steel workpiece Special electromagnetic shielding coating
The bad problem of salt air corrosion performance provides a kind of surface of steel workpiece Special electromagnetic shielding coating.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of surface of steel workpiece Special electromagnetic shielding coating, is made of the raw material of following parts by weight:
30~40 parts of epoxy resin
30~40 parts of diluent
3~5 parts of curing agent
10~20 parts of modified filler
Modified 8~10 parts of hollow carbon fiber
5~8 parts of silver-coated copper powder
3~5 parts of polyacrylic acid zinc resin
3~5 parts of silane coupling agent
2~3 parts of dispersing agent
The process for preparation of the surface of steel workpiece Special electromagnetic shielding coating are as follows: each raw material is weighed by raw material composition, by epoxy
Resin, diluent, curing agent, modified filler, modified hollow carbon fiber, silver-coated copper powder, polyacrylic acid zinc resin, silane coupling agent
It is stirred with dispersing agent to get surface of steel workpiece Special electromagnetic shielding coating.
The epoxy resin is any one in epoxy resin E51, epoxy resin E44 or epoxy resin E20.
The diluent is acetone, any one in dimethylbenzene or ethyl alcohol.
The curing agent is dihexyl triamine, any one in diethylaminopropylamine or triethylene tetramine.
The preparation process of the modified filler are as follows: according to parts by weight, successively take 10~20 parts of ferrous nitrates, 40~50 parts
Ferric nitrate, 200~300 parts of water, is stirred dissolution, obtains mixed serum, then ammonium hydroxide is added dropwise into mixed serum, adjusts mixing slurry
Liquid pH to 8.0~8.2 adds 0.1~0.2 times of mixed serum quality of carragheen and 0.01~0.03 times of mixed serum quality
Emulsifier, after being stirred, keep the temperature still aging, then after being concentrated under reduced pressure, low temperature spray drying obtains modified filler.
The preparation process of the modified hollow carbon fiber are as follows: according to parts by weight, by 20~30 parts of hollow carbon fibers, 0.2
Hollow carbon fiber matter is then added dropwise in~0.3 part of yeast powder, 3~5 parts of starch, 20~30 parts of water mixing ultrasounds, then mixed fermentation
Measure 0.01~0.02 times of amylase and 0.01~0.02 times of hollow carbon fiber quality of iron chloride, filtering, high-temperature process to get
Modified hollow carbon fiber.
The silane coupling agent is silane resin acceptor kh-550, in silane coupling agent KH-560 or Silane coupling reagent KH-570
Any one.
The dispersing agent is dispersing agent 5040, any one in dispersing agent NNO or Dispersant MF.
The modification oxygen of epoxy resin quality 3~5% can also be added in the surface of steel workpiece Special electromagnetic shielding coating
Graphite alkene；The modifying process of the modified graphene oxide are as follows:
(1) according to parts by weight, 10~20 parts of graphene oxides are successively taken, 3~5 parts of kayexalates, 100~150 parts
Deionized water, after ultrasonic disperse, is concentrated, and spray drying obtains pretreatment graphene oxide；
It (2) is in mass ratio after 1:3~1:5 is mixed by pretreatment graphene oxide and toluene di-isocyanate(TDI), heating stirring is anti-
It answers, then vacuum dried, obtains modified graphene oxide.
The beneficial effects of the present invention are:
(1) present invention is by addition modified filler, modified hollow carbon fiber and polypropylene acidic resins, firstly, in modified filler
In preparation process, ferrous nitrate and ferric nitrate can be transformed into the magnetic nanometer four of tool under the alkaline system that ammonium hydroxide provides and aoxidize
Three-iron, in ageing process, the nano ferriferrous oxide of generation is adsorbable and is scattered in carragheen gelling system, meanwhile, body
Sodium ion in system can be dispersed in gel rubber system, be then passed through spray drying, formed shell be nano ferriferrous oxide and
Internal wrappage is the microballoon of carragheen, secondly, in use, since modified filler surface package has magnetic four oxygen
Change three-iron, steel surface can be adsorbed on, so that the adhesive force of coating gets a promotion, when extraneous neutral salt spray penetrates into
When in system, the gellan gum chance in modified filler is water-swellable, so that modified hollow carbon fiber is squeezed power, but hollow carbon fiber
Due to the toughness of its own, original shape need to be restored, and reverse extrusion power is formed to modified filler, so that the saliferous in gellan gum
Moisture squeezes out, and with the sodium ion in saliferous moisture ion exchange can occur for zinc ion in polyacrylic acid zinc resin, to make to apply
The polyacrylic resin of layer surface becomes solvable and falls off with one end of zinc ion, so that the resistance to neutral salt spray of system
It can further be promoted；
(2) technical solution of the present invention in system by being further introduced into homemade modified graphene oxide, firstly, in modified oxygen
In the preparation process of graphite alkene, under kayexalate effect, phenyl ring can be total with graphene oxide in molecular structure
Yoke area generates interaction and adsorbs, and sulfonic acid group can introduce more negative electrical charges between graphene oxide layer structure, thus
Make interlayer structure because mutually exclusive with like charges, the lamella graphene oxide after effectively avoiding removing is reunited again, is being sprayed
In mist granulation process, monolithic layer structure and morphology is made to change, surface roughness is promoted, and spherical in shape can be dispersed, and further
Under isocyanates effect, isocyanate structural can be introduced in surface of graphene oxide, promote graphene oxide and coating matrix
Between interface compatibility and binding force, in the dry contraction process of coating, the graphene oxide rupture of spherical structure is separated into
Smaller laminated structure, to not only may make up in coating surface and the continuous smaller laminated structure of internal formation to outside
Corrosive medium is effective against structure, can also effectively extend the diffusion path of corrosive medium, obtain the corrosion resistance of product
Further promoted；In addition, the introducing of graphene oxide conjugation area and the phenyl ring in kayexalate molecular structure, can mention
High coating avoids coating from loosening peeling in use the adsorption capacity of surface of steel workpiece, effectively extends the anti-corrosion of coating
Service life.
Specific embodiment
According to parts by weight, 10~20 parts of graphene oxides are successively taken, 3~5 parts of kayexalates, 100~150 parts
Deionized water, after ultrasonic disperse, is concentrated, and spray drying obtains pretreatment graphene oxide；It will pretreatment graphene oxide and toluene
Diisocyanate is heating stirring reaction after 1:3~1:5 mixing in mass ratio, then vacuum dried, obtains modified graphite oxide
Alkene；According to parts by weight, 10~20 parts of ferrous nitrates, 40~50 parts of ferric nitrates are successively taken, 200~300 parts of water pour into beaker
In, it is stirred 20~30min of dissolution with glass bar, obtains mixed serum, then the beaker for filling mixed serum is moved into digital display and is surveyed
Fast constant temperature blender with magnetic force is 45~55 DEG C in temperature, under the conditions of speed of agitator is 300~500r/min, passes through dropping funel
The ammonium hydroxide that mass fraction is 15~20% is added dropwise into beaker with 3~5mL/min rate, adjusts mixed serum pH to 8.0 in beaker
~8.2,0.1~0.2 times of mixed serum quality of carragheen and 0.01~0.03 times of mixed serum quality of emulsifier are added,
Continue constant temperature and be stirred 45~60min, stop stirring, keeps the temperature still aging 2~4h, obtain ageing liquid, and gained is aged liquid
Rotary Evaporators are moved into, is 75~80 DEG C in temperature, under the conditions of pressure is 400~500kPa, 6~8h is concentrated under reduced pressure, must be concentrated
Liquid, and gained concentrate is delivered to spray dryer with 25~35g/min feed rate, in inlet air temperature be 95~100 DEG C,
Under the conditions of leaving air temp is 75~80 DEG C, cold nebulization is granulated, and obtains modified filler；According to parts by weight, hollow by 20~30 parts
Carbon fiber, 0.2~0.3 part of yeast powder, 3~5 parts of starch, 20~30 parts of water are placed in single-necked flask, in supersonic frequency be 55~
Under the conditions of 75kHz, mix 40~60min of ultrasound, obtain dispersion liquid, then dispersion liquid is placed in fermentation cauldron, in temperature for 30~
It 35 DEG C, under the conditions of revolving speed is 100~200r/min, ferments 3~5 days, hollow carbon fiber quality is then added dropwise into fermentation cauldron
0.01~0.02 times of amylase and 0.01~0.02 times of hollow carbon fiber quality of iron chloride, in revolving speed be 400~600r/
Under the conditions of min, after being stirred 40~60min, filtering obtains filter residue, then by filter residue, then filter residue is placed in tube furnace,
Then nitrogen is filled with into furnace with the rate of 60~90mL/min, under the conditions of temperature is 1100~1200 DEG C, high-temperature process 2~
3h is to get modified hollow carbon fiber；According to parts by weight, by 30~40 parts of epoxy resin, 30~40 parts of diluents, 3~5 parts solid
Agent, 10~20 parts of modified fillers, 8~10 parts of modified hollow carbon fibers, 5~8 parts of silver-coated copper powders, 3~5 parts of polyacrylic acid zinc trees
Rouge, 3~5 parts of silane coupling agents and 2~3 parts of dispersing agents are placed in batch mixer and material gross mass 3~5% changes in batch mixer
Property graphene oxide, in revolving speed be 1100~1200r/min under the conditions of, high-speed stirred mix 40~60min to get iron and steel parts
Surface Special electromagnetic shielding coating.The epoxy resin is any in epoxy resin E51, epoxy resin E44 or epoxy resin E20
It is a kind of.The diluent is acetone, any one in dimethylbenzene or ethyl alcohol.The curing agent is dihexyl triamine, diethylamino
Any one in base propylamine or triethylene tetramine.The silane coupling agent is silane resin acceptor kh-550, silane coupling agent KH-
560 or Silane coupling reagent KH-570 in any one.The dispersing agent is dispersing agent 5040, dispersing agent NNO or Dispersant MF
In any one.
Example 1
According to parts by weight, 10 parts of graphene oxides, 3 parts of kayexalates, 100 parts of deionized waters, ultrasound point are successively taken
It after dissipating, is concentrated, spray drying obtains pretreatment graphene oxide；Graphene oxide will be pre-processed and toluene di-isocyanate(TDI) presses matter
Amount than being after 1:3 is mixed, react, then vacuum dried by heating stirring, obtains modified graphene oxide；According to parts by weight, successively
20 parts of ferrous nitrates, 50 parts of ferric nitrates are taken, 300 parts of water pour into beaker, are stirred dissolution 30min with glass bar, must mix
Slurries, then the beaker for filling mixed serum immigration digital display is tested the speed constant temperature blender with magnetic force, it is 55 DEG C in temperature, speed of agitator is
Under the conditions of 500r/min, the ammonium hydroxide that mass fraction is 20% is added dropwise into beaker with 5mL/min rate by dropping funel, adjusts
Mixed serum pH to 8.2 in beaker adds 0.2 times of mixed serum quality of carragheen and 0.03 times of mixed serum quality of cream
Agent continues constant temperature and is stirred 60min, stops stirring, keep the temperature still aging 4h, obtains ageing liquid, and gained ageing liquid is moved
Enter Rotary Evaporators, is 80 DEG C in temperature, under the conditions of pressure is 500kPa, 8h is concentrated under reduced pressure, obtains concentrate, and gained is concentrated
Liquid is delivered to spray dryer with 35g/min feed rate, in inlet air temperature be 100 DEG C, leaving air temp be 80 DEG C under the conditions of, it is low
Warm mist projection granulating, obtains modified filler；According to parts by weight, by 30 parts of hollow carbon fibers, 0.3 part of yeast powder, 5 parts of starch, 30 parts
Water is placed in single-necked flask, under the conditions of supersonic frequency is 75kHz, is mixed ultrasound 60min, dispersion liquid is obtained, then by dispersion liquid
It is placed in fermentation cauldron, is 35 DEG C in temperature, under the conditions of revolving speed is 200r/min, ferments 5 days, be then added dropwise into fermentation cauldron hollow
The amylase and 0.02 times of hollow carbon fiber quality of iron chloride that 0.02 times of carbon fiber quality, in revolving speed be 600r/min condition
Under, after being stirred 60min, filtering obtains filter residue, then by filter residue, then filter residue is placed in tube furnace, then with 90mL/
The rate of min is filled with nitrogen into furnace, and under the conditions of temperature is 1200 DEG C, high-temperature process 3h is to get modified hollow carbon fiber；It presses
Parts by weight meter, by 40 parts of epoxy resin, 40 parts of diluents, 5 parts of curing agent, 20 parts of modified fillers, 10 parts of hollow carbon fibers of modification
Dimension, 8 parts of silver-coated copper powders, 5 parts of polyacrylic acid zinc resins, 5 parts of silane coupling agents and 3 parts of dispersing agents are placed in batch mixer, and mixed
The modified graphene oxide of material gross mass 5% in material machine, under the conditions of revolving speed is 1200r/min, high-speed stirred mixes 60min,
Up to surface of steel workpiece Special electromagnetic shielding coating.The epoxy resin is epoxy resin E51.The diluent is acetone.
The curing agent is dihexyl triamine.The silane coupling agent is silane resin acceptor kh-550.The dispersing agent is dispersing agent
5040。
Example 2
According to parts by weight, by 30 parts of hollow carbon fibers, 0.3 part of yeast powder, 5 parts of starch, 30 parts of water are placed in single-necked flask, in
Under the conditions of supersonic frequency is 75kHz, ultrasound 60min is mixed, dispersion liquid is obtained, then dispersion liquid is placed in fermentation cauldron, Yu Wendu
It is 35 DEG C, under the conditions of revolving speed is 200r/min, ferments 5 days, 0.02 times of hollow carbon fiber quality is then added dropwise into fermentation cauldron
Amylase and 0.02 times of hollow carbon fiber quality of iron chloride, under the conditions of revolving speed is 600r/min, after being stirred 60min,
Filtering, is obtained filter residue, then by filter residue, then filter residue is placed in tube furnace, be then filled with the rate of 90mL/min into furnace
Nitrogen, under the conditions of temperature is 1200 DEG C, high-temperature process 3h is to get modified hollow carbon fiber；According to parts by weight, by 40 parts of rings
Oxygen resin, 40 parts of diluents, 5 parts of curing agent, 10 parts of modified hollow carbon fibers, 8 parts of silver-coated copper powders, 5 parts of polyacrylic acid zinc resins,
5 parts of silane coupling agents and 3 parts of dispersing agents are placed in batch mixer, under the conditions of revolving speed is 1200r/min, high-speed stirred mixing
60min is to get surface of steel workpiece Special electromagnetic shielding coating.The epoxy resin is epoxy resin E51.The diluent is
Acetone.The curing agent is dihexyl triamine.The silane coupling agent is silane resin acceptor kh-550.The dispersing agent is dispersion
Agent 5040.
Example 3
According to parts by weight, 20 parts of ferrous nitrates, 50 parts of ferric nitrates are successively taken, 300 parts of water are poured into beaker, stirred with glass bar
Mixed dissolution 30min is mixed, obtains mixed serum, then the beaker for filling mixed serum immigration digital display is tested the speed constant temperature blender with magnetic force,
It is 55 DEG C in temperature, under the conditions of speed of agitator is 500r/min, matter is added dropwise into beaker with 5mL/min rate by dropping funel
Measure the ammonium hydroxide that score is 20%, adjust mixed serum pH to 8.2 in beaker, add 0.2 times of mixed serum quality of carragheen with
The emulsifier that 0.03 times of mixed serum quality continues constant temperature and is stirred 60min, stops stirring, keep the temperature still aging 4h, obtain old
Change liquid, and gained ageing liquid moved into Rotary Evaporators, is 80 DEG C in temperature, under the conditions of pressure is 500kPa, 8h is concentrated under reduced pressure,
Concentrate, and gained concentrate is delivered to spray dryer with 35g/min feed rate, in inlet air temperature be 100 DEG C, out
Under the conditions of air temperature is 80 DEG C, cold nebulization is granulated, and obtains modified filler；According to parts by weight, by 40 parts of epoxy resin, 40 parts dilute
Release agent, 5 parts of curing agent, 20 parts of modified fillers, 8 parts of silver-coated copper powders, 5 parts of polyacrylic acid zinc resins, 5 parts of silane coupling agents and 3 parts
Dispersing agent is placed in batch mixer, and under the conditions of revolving speed is 1200r/min, high-speed stirred mixes 60min to get surface of steel workpiece
Special electromagnetic shielding coating.The epoxy resin is epoxy resin E51.The diluent is acetone.The curing agent be two oneself
Base triamine.The silane coupling agent is silane resin acceptor kh-550.The dispersing agent is dispersing agent 5040.
Example 4
According to parts by weight, 20 parts of ferrous nitrates, 50 parts of ferric nitrates are successively taken, 300 parts of water are poured into beaker, stirred with glass bar
Mixed dissolution 30min is mixed, obtains mixed serum, then the beaker for filling mixed serum immigration digital display is tested the speed constant temperature blender with magnetic force,
It is 55 DEG C in temperature, under the conditions of speed of agitator is 500r/min, matter is added dropwise into beaker with 5mL/min rate by dropping funel
Measure the ammonium hydroxide that score is 20%, adjust mixed serum pH to 8.2 in beaker, add 0.2 times of mixed serum quality of carragheen with
The emulsifier that 0.03 times of mixed serum quality continues constant temperature and is stirred 60min, stops stirring, keep the temperature still aging 4h, obtain old
Change liquid, and gained ageing liquid moved into Rotary Evaporators, is 80 DEG C in temperature, under the conditions of pressure is 500kPa, 8h is concentrated under reduced pressure,
Concentrate, and gained concentrate is delivered to spray dryer with 35g/min feed rate, in inlet air temperature be 100 DEG C, out
Under the conditions of air temperature is 80 DEG C, cold nebulization is granulated, and obtains modified filler；According to parts by weight, by 30 parts of hollow carbon fibers, 0.3
Part yeast powder, 5 parts of starch, 30 parts of water are placed in single-necked flask, under the conditions of supersonic frequency is 75kHz, mix ultrasound 60min,
Dispersion liquid is obtained, then dispersion liquid is placed in fermentation cauldron, is 35 DEG C in temperature, under the conditions of revolving speed is 200r/min, ferments 5 days,
Then 0.02 times of hollow carbon fiber quality of amylase and 0.02 times of hollow carbon fiber quality of iron chloride are added dropwise into fermentation cauldron,
Under the conditions of revolving speed is 600r/min, after being stirred 60min, filtering obtains filter residue, then by filter residue, is then placed in filter residue
In tube furnace, nitrogen is then filled with into furnace with the rate of 90mL/min, under the conditions of temperature is 1200 DEG C, high-temperature process 3h,
Up to modified hollow carbon fiber；According to parts by weight, by 40 parts of epoxy resin, 40 parts of diluents, 5 parts of curing agent, 20 parts of modifications
Filler, 10 parts of modified hollow carbon fibers, 8 parts of silver-coated copper powders, 5 parts of silane coupling agents and 3 parts of dispersing agents are placed in batch mixer, in turn
Under the conditions of speed is 1200r/min, high-speed stirred mixes 60min to get surface of steel workpiece Special electromagnetic shielding coating.The ring
Oxygen resin is epoxy resin E51.The diluent is acetone.The curing agent is dihexyl triamine.The silane coupling agent is
Silane resin acceptor kh-550.The dispersing agent is dispersing agent 5040.
Comparative example: the surface of steel workpiece Special electromagnetic of Zhuzhou new material Science and Technology Co., Ltd. production, which shields, to be applied
Material.
1 to 4 gained surface of steel workpiece Special electromagnetic shielding coating of example and comparative example product are subjected to performance detection, tool
Body detecting method is as follows:
Coating is sprayed on test plate (panel) by the requirement of GB/T1727, tests resistance to neutral salt spray performance by GB/T1771.Specific detection knot
Fruit is as shown in table 1:
Table 1: performance detection table
| Detection content | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example |
| Resistance to Neutral Salt Spray Corrosion (1000h) | Paint film is not blistering, corrodes at scratch 0.46mm | Paint film is not blistering, corrodes at scratch 1.15mm | Paint film is not blistering, corrodes at scratch 1.54mm | Paint film is not blistering, corrodes at scratch 1.63mm | Occur vesicle at scratch, corrodes 2.67mm |
By 1 testing result of table it is found that present invention gained surface of steel workpiece Special electromagnetic shielding coating has excellent resistance to neutrality
Salt air corrosion performance.
Claims (9)
1. a kind of surface of steel workpiece Special electromagnetic shielding coating, it is characterised in that: be made of the raw material of following parts by weight:
30~40 parts of epoxy resin
30~40 parts of diluent
3~5 parts of curing agent
10~20 parts of modified filler
Modified 8~10 parts of hollow carbon fiber
5~8 parts of silver-coated copper powder
3~5 parts of polyacrylic acid zinc resin
3~5 parts of silane coupling agent
2~3 parts of dispersing agent
The process for preparation of the surface of steel workpiece Special electromagnetic shielding coating are as follows: each raw material is weighed by raw material composition, by epoxy
Resin, diluent, curing agent, modified filler, modified hollow carbon fiber, silver-coated copper powder, polyacrylic acid zinc resin, silane coupling agent
It is stirred with dispersing agent to get surface of steel workpiece Special electromagnetic shielding coating.
2. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the asphalt mixtures modified by epoxy resin
Rouge is any one in epoxy resin E51, epoxy resin E44 or epoxy resin E20.
3. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the diluent
Any one for acetone, in dimethylbenzene or ethyl alcohol.
4. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the curing agent
Any one for dihexyl triamine, in diethylaminopropylamine or triethylene tetramine.
5. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the modification is filled out
The preparation process of material are as follows: according to parts by weight, successively take 10~20 parts of ferrous nitrates, 40~50 parts of ferric nitrates, 200~300 parts
Water is stirred dissolution, obtains mixed serum, then ammonium hydroxide is added dropwise into mixed serum, adjusts mixed serum pH to 8.0~8.2, then
0.1~0.2 times of mixed serum quality of carragheen and 0.01~0.03 times of mixed serum quality of emulsifier is added, is stirred
Afterwards, heat preservation is still aging, then after being concentrated under reduced pressure, low temperature spray drying obtains modified filler.
6. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: in the modification
The preparation process of empty carbon fiber are as follows: according to parts by weight, by 20~30 parts of hollow carbon fibers, 0.2~0.3 part of yeast powder, 3~5
0.01~0.02 times of hollow carbon fiber quality of shallow lake is then added dropwise in part starch, 20~30 parts of water mixing ultrasounds, then mixed fermentation
Powder enzyme and 0.01~0.02 times of hollow carbon fiber quality of iron chloride, filtering, high-temperature process is to get modified hollow carbon fiber.
7. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the silane is even
Connection agent is silane resin acceptor kh-550, any one in silane coupling agent KH-560 or Silane coupling reagent KH-570.
8. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the dispersing agent
For dispersing agent 5040, any one in dispersing agent NNO or Dispersant MF.
9. a kind of surface of steel workpiece Special electromagnetic shielding coating according to claim 1, it is characterised in that: the steel work
The modified graphene oxide of epoxy resin quality 3~5% can also be added in the Special electromagnetic shielding coating of part surface；The modification
The modifying process of graphene oxide are as follows:
(1) according to parts by weight, 10~20 parts of graphene oxides are successively taken, 3~5 parts of kayexalates, 100~150 parts
Deionized water, after ultrasonic disperse, is concentrated, and spray drying obtains pretreatment graphene oxide；
It (2) is in mass ratio after 1:3~1:5 is mixed by pretreatment graphene oxide and toluene di-isocyanate(TDI), heating stirring is anti-
It answers, then vacuum dried, obtains modified graphene oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910505867.5A CN110373085A (en) | 2019-06-12 | 2019-06-12 | A kind of surface of steel workpiece Special electromagnetic shielding coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910505867.5A CN110373085A (en) | 2019-06-12 | 2019-06-12 | A kind of surface of steel workpiece Special electromagnetic shielding coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110373085A true CN110373085A (en) | 2019-10-25 |
Family
ID=68250066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910505867.5A Pending CN110373085A (en) | 2019-06-12 | 2019-06-12 | A kind of surface of steel workpiece Special electromagnetic shielding coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110373085A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608638A (en) * | 2021-01-14 | 2021-04-06 | 成都萃匀离环保科技有限公司 | Preparation method of high-stability modified polyepoxy resin composite conductive coating |
| CN114989696A (en) * | 2022-05-31 | 2022-09-02 | 福建泉州旺拉利建材有限公司 | Mortar surface viscosity enhancing interface agent and use method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275052A (en) * | 2008-05-14 | 2008-10-01 | 海洋化工研究院 | Corrosion-resistant electromagnetic screen coating and preparation thereof |
| CN101880499A (en) * | 2010-04-22 | 2010-11-10 | 中山市杜威涂料有限公司 | Alcohol-soluble electromagnetic wave shielding coating |
| CN107880856A (en) * | 2017-11-13 | 2018-04-06 | 常州莱尚纺织品有限公司 | A kind of paraffin wax emulsions ice slurry and preparation method thereof |
| CN108485473A (en) * | 2018-04-19 | 2018-09-04 | 郦璋 | A kind of heat-insulating composite epoxy resin paint |
-
2019
- 2019-06-12 CN CN201910505867.5A patent/CN110373085A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275052A (en) * | 2008-05-14 | 2008-10-01 | 海洋化工研究院 | Corrosion-resistant electromagnetic screen coating and preparation thereof |
| CN101880499A (en) * | 2010-04-22 | 2010-11-10 | 中山市杜威涂料有限公司 | Alcohol-soluble electromagnetic wave shielding coating |
| CN107880856A (en) * | 2017-11-13 | 2018-04-06 | 常州莱尚纺织品有限公司 | A kind of paraffin wax emulsions ice slurry and preparation method thereof |
| CN108485473A (en) * | 2018-04-19 | 2018-09-04 | 郦璋 | A kind of heat-insulating composite epoxy resin paint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608638A (en) * | 2021-01-14 | 2021-04-06 | 成都萃匀离环保科技有限公司 | Preparation method of high-stability modified polyepoxy resin composite conductive coating |
| CN114989696A (en) * | 2022-05-31 | 2022-09-02 | 福建泉州旺拉利建材有限公司 | Mortar surface viscosity enhancing interface agent and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101182127B (en) | Method for preparing electric filler and uses thereof | |
| CN110373085A (en) | A kind of surface of steel workpiece Special electromagnetic shielding coating | |
| CN109370414B (en) | Graphene heat dissipation coating and preparation method thereof | |
| CN107486135B (en) | Bentonite-coated ferroferric oxide nano material and preparation method and application thereof | |
| CN109206961A (en) | A kind of graphene conductive heat-conductive coating and preparation method thereof | |
| CN110093087A (en) | A kind of double-component aqueous graphene heavy antisepsis heat radiation coating and preparation method | |
| CN110342531A (en) | A kind of iron powder coated silica material and preparation method thereof | |
| CN111004598B (en) | Conductive silver adhesive applied to electronic resonator and preparation method | |
| CN110862592B (en) | Alumina/carboxylic butyronitrile composite material and preparation method thereof | |
| CN114133740A (en) | Heat-conducting wave-absorbing silicone rubber composite material and preparation method thereof | |
| CN113930133B (en) | Heavy-duty corrosion-resistant sintering epoxy powder coating special for roll coating of large-caliber steel pipe and preparation method thereof | |
| CN108341929A (en) | A kind of Graphene epoxy resin composite material and preparation method thereof | |
| CN103275529A (en) | 0.6-18GHz-frequency-band wave-absorbing powder/inorganic silicate anti-electromagnetic interference coating material and preparation method thereof | |
| CN111748191A (en) | Two-dimensional graphene composite material with copper nanoparticles loaded on surface and preparation method and application thereof | |
| CN101654582A (en) | Rust resistance and corrosion resistance coating | |
| CN106543773A (en) | The scale surface treatment method of the superfine quartz powder of median≤2 μm | |
| CN1208403C (en) | Organic/inorganic composite electromagnetic wave absorbing and shielding paint | |
| CN108102434A (en) | A kind of nanometer of toughening inorganic zinc coating and preparation method thereof | |
| CN102234472A (en) | Conductive paint with strong heat-insulating and corrosion-resistant properties and manufacturing process thereof | |
| CN104212311B (en) | A kind of emulsion paint having capability of electromagnetic shielding | |
| CN109940953A (en) | Double-layer composite wave-absorbing material and preparation method thereof | |
| CN104910587B (en) | Add the epoxy resin composite material preparation method of modified coal ash | |
| CN111378302B (en) | High-performance anti-electromagnetic wave interference normal-temperature cured phosphate anti-corrosion coating and preparation method thereof | |
| CN114603133A (en) | Conductive silver paste containing multilevel-structure nano filler and preparation method thereof | |
| CN106633833B (en) | The preparation method of a kind of electronic equipment case material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191025 |