CN109852232A - A kind of preparation method of electromagnetic screen coating - Google Patents
A kind of preparation method of electromagnetic screen coating Download PDFInfo
- Publication number
- CN109852232A CN109852232A CN201910079394.7A CN201910079394A CN109852232A CN 109852232 A CN109852232 A CN 109852232A CN 201910079394 A CN201910079394 A CN 201910079394A CN 109852232 A CN109852232 A CN 109852232A
- Authority
- CN
- China
- Prior art keywords
- reaction
- self
- preparation
- electromagnetic screen
- made fill
- 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.)
- Withdrawn
Links
Landscapes
- Paints Or Removers (AREA)
Abstract
The present invention relates to a kind of preparation methods of electromagnetic screen coating, belong to technical field of paint preparation.The present invention is first using rice straw as raw material, high-temperature high-voltage reaction after being mixed after stalk steam blasting with citric acid solution, reaction filter residue is put into retort, charing obtains self-made fill, then by polyvinyl alcohol and 3, it is stirred to react after the mixing of 4- dihydroxy-benzoic acid, obtain reaction solution, reaction solution and self-made fill are mixed again, catechol-oxydase is added and is modified reaction, obtain modified self-made fill, self-made fill and matrix resin will be finally modified and other auxiliary agents are blended and electromagnetic screen coating is made, electromagnetism coating electromagnetic shielding performance produced by the present invention is more preferable, it has broad application prospects.
Description
Technical field
The present invention relates to a kind of preparation methods of electromagnetic screen coating, belong to technical field of paint preparation.
Background technique
With the rapid development of information technology, computer network, information processing equipment, electronic communication equipment and various electric appliances
Equipment as information technology carrier various industries be widely applied, especially electronic component miniaturization, Highgrade integration with
And electronic instrument lightweight, high speed and digitlization；Electromagnetic signal, since it is acted vulnerable to outside electromagnetic interference
Fault, to have serious consequences, it is therefore necessary to take various effective protection measures, could ensure its interference-free and paralysis.
For in terms of electromagnetic signal leakage is given away secrets, no matter military secrecy or trade secret by the leakage of electromagnetic wave can all give phase
It closes unit to cause greatly to lose, corresponding shielding measure must be taken thus, prevent electromagnetic signal from revealing and being detected, to prevent
It gives away secrets.Electromagnetic wave EMI can interfere the normal function of all electronic apparatus, and generate harm to human health, and no matter EMI is to production
It is all a kind of electronic pollution for product or the mankind.High molecule plastic shell is set to have electromagnetic radiation resistant interference and anti-number
Communication information leakage, it is necessary to use conductive shielding material as high molecule plastic surface of shell coating, eliminate and mitigate electromagnetic wave
Interference.Chinese patent CN1632001 provides that the present invention relates to a kind of screening conductive paint/lacquers to include by weight percentage
Following components: metal powder 25~45%, bonding agent 5~25%, viscosity agent 1~10%, thickener 1~12%, solvent 20~
25%, pH adjusting agent 0.5~2%, water 5~20%.Chinese patent CN2917207 provides a kind of environment-friendly type electromagnetic shielding with leading
Electric material, it is coated with anti-electromagnetism of the thickness at 8~15 microns using plastic casing as base, in the inner surface of base or outer surface
Shielding coating layer, the dope layer coated on the plastic casing are spray coating either brush, and dope layer is conductive paint,
Dope layer contains the film-forming resin of 10-30%, and the low pine of 18-28% is than sheet composition metal conductive powder body, the environmental protection of 10-30%
Type solvent, the metallic surface modifier of 2-10%, the auxiliary agent of 0.5%-2.0%；Applied to radio interference shielding or its
It needs the occasion on the highly conductive surface of low cost, is that mobile phone, television set, DVD, laptop, home or office electrical appliance are set
The environment protective conducting material for electromagnetic shielding of the nonmetallic electronic product casing such as standby, Medical Devices.
Electromagnetic screen coating is formulated by synthetic resin, conductive filler, solvent, it is coated on substrate surface and forms one
Layer cured film, to generate conductive shield effect.Coating method is mainly using spraying, brushing, dip-coating and roller coating etc..Conductive coating
Great advantage as electromagnetic shielding material be it is at low cost, it is simple and practical and widely applicable.
Existing electromagnetic screen coating based on conductive coating, the electroconductive stuffing that is added in conductive coating be usually gold,
The non-metal powders such as the metal powders such as silver, copper, nickel and carbon black, graphite.The electric conductivity highest of bronze, chemical stability is good, but valence
Lattice are expensive, so that using being restricted.The electric conductivity of silver powder is also very excellent, and price is low compared with bronze, although with easily being precipitated after glue,
There is " migration " phenomenon, but more generallys use.Copper, the performance of nickel and silver are close, and price is more much lower but oxidizable than silver,
Electric conductivity is unstable, and the durability with glue is poor.As conductive filler, good dispersion is cheap for carbon black, powdered graphite, but
Electric conductivity is poor, is ideal material as electromagnetic shielding.
But existing electromagnetic screen coating effectiveness is poor, while conductive powder body and matrix resin phase in coating
Capacitive is poor, also will affect effectiveness, because a kind of conductive powder body of the invention and matrix resin compatibility are good, electromagnetic shielding effect
The good novel electromagnetic shielding coating of fruit has positive meaning to technical field of paint preparation.
Summary of the invention
Present invention mainly solves the technical issues of, it is poor for current electromagnetic screen coating effectiveness, simultaneously
Conductive powder body and matrix resin poor compatibility, also will affect the defect of effectiveness, provide a kind of electromagnetic screen in coating
Cover the preparation method of coating.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of preparation method of electromagnetic screen coating, it is characterised in that specific preparation step are as follows:
Polyaniline, epoxy resin, modified self-made fill, 2-methylimidazole, ethyl acetate is weighed to be put into colloid mill, with 700~
Discharging is after 20~30min of revolving speed ground and mixed of 800r/min to get electromagnetic screen coating；
The preparation step of the modified self-made fill are as follows:
(1) after the 3,4- dihydroxy-benzoic acid solution mixing that the poly-vinyl alcohol solution and mass fraction that mass fraction is 25% are 30%
It is fitted into reaction kettle, 70~80 DEG C of heat temperature raising, 3~5h is stirred to react with the revolving speed of 300~400r/min, obtains reaction solution；
(2) reaction solution and self-made fill mixing will be obtained, will be fitted into reaction kettle, 15~20min of pre-reaction is stirred, pre-reaction terminates
The catechol-oxydase that reaction solution quality 5% is continuously added in backward reaction kettle, with 700~800r/min's at 30~40 DEG C
Revolving speed is stirred to react 3~5h, filters after reaction, isolated reaction filter cake, as modified self-made fill；
The preparation step of the self-made fill are as follows:
(1) it weighs rice straw and is put into 20~30min of crushing in pulverizer, obtain stalk crushed material, then stalk crushed material is filled
Enter in steam blasting tank, heat-insulation pressure keeping handles 1~2min, the instantaneous pressure release of after treatment, and collection obtains steam explosion products；
(2) high-temperature high-pressure reaction kettle is packed into after mixing the citric acid solution that obtained steam explosion products and mass fraction are 1%
In, it is 1.0~1.2MPa in pressure, temperature is 10~12h of high-temperature high-voltage reaction under conditions of 150~160 DEG C；
(3) it after to high-temperature high-voltage reaction, is separated by filtration to obtain reaction filter residue, reaction filter residue is put into baking oven, 105~
Dry 1~2h, obtains dried object at 110 DEG C, and dried object is moved into retort, under nitrogen protection, it is heated to 400~
500 DEG C, heat preservation 1~2h of charing obtains carbonizing production, as self-made fill.
In electromagnetic screen coating each raw material according to parts by weight, polyaniline is 30~40 parts, epoxy resin is 15~20 parts,
Modified self-made fill is 10~15 parts, 2-methylimidazole is 0.3~0.5 part, ethyl acetate is 25~30 parts.
In the preparation step (1) of the modified self-made fill, poly-vinyl alcohol solution and mass fraction that mass fraction is 25%
Mass ratio for 30% 3,4- dihydroxy-benzoic acid solution is 2:1.
In the preparation step (2) of the modified self-made fill, the mass ratio of reaction solution and self-made fill is 8:1.
The pressure that heat-insulation pressure keeping is handled in the preparation step (1) of the self-made fill is preferably that 1.5~1.8MPa, temperature are excellent
It is selected as 200~220 DEG C.
The matter for the citric acid solution that steam explosion products and mass fraction are 1% in the preparation step (2) of the self-made fill
Amount is than being 1:8.
Pectase can also be added in the preparation step (2) of the self-made fill, laccase promotes the hydrolysis of fiber.
The temperature of heat preservation charing can be more preferably 480~500 DEG C in the preparation step (3) of the self-made fill.
The method have the benefit that:
(1) present invention is first using rice straw as raw material, high temperature and pressure after mixing after stalk steam blasting with citric acid solution
Reaction filter residue is put into retort by reaction, and charing obtains self-made fill, then by polyvinyl alcohol and 3,4-Dihydroxybenzoic acid
It is stirred to react after mixing, obtains reaction solution, then reaction solution and self-made fill are mixed, catechol-oxydase is added and is modified instead
It answers, obtains modified self-made fill, it finally will modified self-made fill and matrix resin and the obtained electromagnetic shielding of other auxiliary agents blending
Coating, the present invention first to smashed stalk carry out Steam explosion treatment, keep stalk fibre physical mechanics property itself and
Under conditions of complete appearance, fibrous inside generates pressure difference during pressurization and moment discharge, so that shape inside stalk fibre
At the high pressure draught impacted from inside to outside, under the action of the high pressure draught, the weakness group such as stalk fibre cell wall and pit membrane
It knits by high pressure dilating expansion, expands stalk fibre inner space capacity, then mix explosion fiber and citric acid solution high
Warm autoclaving, stalk fibre absorbs thermal energy under high pressure and high temperature condition, and stronger activity occurs for strand, relatively narrow at one
Within the temperature range of, intermolecular connection rupture hydrolyzes, hydrolysis can promote furfural to produce under the action of organic acid
It is raw, and condensation or polycondensation (resinification) can occur under subsequent effect for the furfural generated, finally obtain the stalk fibre of resinification,
During resinification, condensation polycondensation occurs for the furfural between fiber, combines so that adjacent fiber be anchored, and it is intricate to be formed
Cross-linked structure, further enrich the space structure inside stalk fibre, then the present invention is by hydrogen peroxide by straw
The hydroxyl on stalk fiber surface aoxidizes, and increases its charcoal chain molecular weight, then remove the wood substance component in stalk fibre with dipping by lye,
The inner space capacity for expanding stalk fibre again, finally carbonizes, and has obtained that the porosity is higher, and internal structure is more complicated
Stalk Carbon fibe, and the increase of the porosity and interior spatial structure are more complicated, be more advantageous to electromagnetic wave attenuation by absorption and
Multiple attenuation, therefore, the shielding properties for adding the electromagnetic screen coating of stalk Carbon fibe of the present invention are improved；
(2) present invention is stirred to react after also mixing polyvinyl alcohol and 3,4-Dihydroxybenzoic acid, and gained reaction solution and self-control are filled out
Material and the reaction of catechol-oxydase high-speed stirred, wherein poly-vinyl alcohol solution and 3,4-Dihydroxybenzoic acid solution first carry out ester
Change reaction, to introduce catechol functional group, then carries out secondary response with catechol-oxydase again, utilize catechol oxygen
Change enzyme to aoxidize catechol group, forms adjacent benzoquinones structure, Michael addition reaction can occur between adjacent benzoquinones, formed covalent
Key crosslinking points finally form one layer of macromolecule network polymers on self-made fill surface, and the presence of this layer of network polymers improves
Compatibility between self-made fill and matrix resin of the present invention, improves the effectiveness of coating, has wide answer
Use prospect.
Specific embodiment
It weighs rice straw and is put into 20~30min of crushing in pulverizer, obtain stalk crushed material, then stalk crushed material is filled
Enter in steam blasting tank, under conditions of pressure is 1.5~1.8MPa, temperature is 200~220 DEG C heat-insulation pressure keeping processing 1~
2min, the instantaneous pressure release of after treatment, collection obtain steam explosion products；It is by obtained steam explosion products and mass fraction
1% citric acid solution is to be fitted into high-temperature high-pressure reaction kettle after 1:8 is mixed in mass ratio, is 1.0~1.2MPa, temperature in pressure
Degree is 10~12h of high-temperature high-voltage reaction under conditions of 150~160 DEG C；After to high-temperature high-voltage reaction, it is separated by filtration to obtain anti-
Filter residue is answered, reaction filter residue is put into baking oven, dry 1~2h, obtains dried object at 105~110 DEG C, and dried object is moved into and is carbonized
In furnace, under nitrogen protection, 400~500 DEG C are heated to, heat preservation 1~2h of charing obtains carbonizing production, and as self-control is filled out
Material, it is spare；In mass ratio be 2:1 by mass fraction be 25% poly-vinyl alcohol solution and mass fraction be 30% 3,4- dihydroxy
It is fitted into reaction kettle after benzoic acid solution mixing, 70~80 DEG C of heat temperature raising, is stirred to react 3 with the revolving speed of 300~400r/min
~5h, obtains reaction solution；It will obtain reaction solution and spare self-made fill be 8:1 mixing in mass ratio, be fitted into reaction kettle, stir
15~20min of pre-reaction is mixed, pre-reaction continuously adds the catechol-oxydase of reaction solution quality 5% into reaction kettle after terminating,
Revolving speed at 30~40 DEG C with 700~800r/min is stirred to react 3~5h, filters after reaction, isolated reaction filter cake,
As modified self-made fill；According to parts by weight, 30~40 parts of polyanilines, 15~20 parts of epoxy resin are weighed, on 10~15 parts
It states modified self-made fill, 0.3~0.5 part of 2-methylimidazole, 25~30 parts of ethyl acetate to be put into colloid mill, with 700~800r/
Discharging is after 20~30min of revolving speed ground and mixed of min to get electromagnetic screen coating.
Example 1
The preparation of steam explosion products:
It weighs rice straw and is put into pulverizer and crush 20min, obtain stalk crushed material, then that stalk crushed material is packed into steam is quick-fried
In broken tank, heat-insulation pressure keeping processing 1min under conditions of pressure is 1.5MPa, temperature is 200 DEG C, the instantaneous pressure release of after treatment,
Collection obtains steam explosion products；
The preparation of self-made fill:
It (1) is in mass ratio to be packed into after 1:8 is mixed by the citric acid solution that obtained steam explosion products and mass fraction are 1%
It is 1.0MPa in pressure, temperature is high-temperature high-voltage reaction 10h under conditions of 150 DEG C in high-temperature high-pressure reaction kettle；
(2) it after to high-temperature high-voltage reaction, is separated by filtration to obtain reaction filter residue, reaction filter residue is put into baking oven, at 105 DEG C
Dry 1h, obtains dried object, and dried object is moved into retort, under nitrogen protection, is heated to 400 DEG C, heat preservation charing
1h obtains carbonizing production, as self-made fill, spare；
The preparation of reaction solution:
In mass ratio be 2:1 by mass fraction be 25% poly-vinyl alcohol solution and mass fraction be 30% 3,4- dihydroxy benzenes first
It is fitted into reaction kettle after acid solution mixing, 70 DEG C of heat temperature raising, 3h is stirred to react with the revolving speed of 300r/min, obtains reaction solution；
The preparation of modified self-made fill:
It will obtain reaction solution and spare self-made fill be 8:1 mixing in mass ratio, be fitted into reaction kettle, stir pre-reaction
15min, pre-reaction continuously add the catechol-oxydase of reaction solution quality 5% into reaction kettle after terminating, at 30 DEG C with
The revolving speed of 700r/min is stirred to react 3h, filters after reaction, isolated reaction filter cake, as modified self-made fill；
The preparation of electromagnetic screen coating:
According to parts by weight, 30 parts of polyanilines, 15 parts of epoxy resin, 10 parts of above-mentioned modified self-made fills, 0.3 part of 2- methyl are weighed
Imidazoles, 25 parts of ethyl acetate are put into colloid mill, to discharge after the revolving speed ground and mixed 20min of 700r/min to get electromagnetic screen
Cover coating.
Example 2
The preparation of steam explosion products:
It weighs rice straw and is put into pulverizer and crush 25min, obtain stalk crushed material, then that stalk crushed material is packed into steam is quick-fried
In broken tank, heat-insulation pressure keeping processing 1min under conditions of pressure is 1.7MPa, temperature is 210 DEG C, the instantaneous pressure release of after treatment,
Collection obtains steam explosion products；
The preparation of self-made fill:
It (1) is in mass ratio to be packed into after 1:8 is mixed by the citric acid solution that obtained steam explosion products and mass fraction are 1%
It is 1.1MPa in pressure, temperature is high-temperature high-voltage reaction 11h under conditions of 155 DEG C in high-temperature high-pressure reaction kettle；
(2) it after to high-temperature high-voltage reaction, is separated by filtration to obtain reaction filter residue, reaction filter residue is put into baking oven, at 108 DEG C
Dry 1h, obtains dried object, and dried object is moved into retort, under nitrogen protection, is heated to 450 DEG C, heat preservation charing
2h obtains carbonizing production, as self-made fill, spare；
The preparation of reaction solution:
In mass ratio be 2:1 by mass fraction be 25% poly-vinyl alcohol solution and mass fraction be 30% 3,4- dihydroxy benzenes first
It is fitted into reaction kettle after acid solution mixing, 75 DEG C of heat temperature raising, 4h is stirred to react with the revolving speed of 350r/min, obtains reaction solution；
The preparation of modified self-made fill:
It will obtain reaction solution and spare self-made fill be 8:1 mixing in mass ratio, be fitted into reaction kettle, stir pre-reaction
18min, pre-reaction continuously add the catechol-oxydase of reaction solution quality 5% into reaction kettle after terminating, at 35 DEG C with
The revolving speed of 750r/min is stirred to react 4h, filters after reaction, isolated reaction filter cake, as modified self-made fill；
The preparation of electromagnetic screen coating:
According to parts by weight, 35 parts of polyanilines, 18 parts of epoxy resin, 13 parts of above-mentioned modified self-made fills, 0.4 part of 2- methyl are weighed
Imidazoles, 28 parts of ethyl acetate are put into colloid mill, to discharge after the revolving speed ground and mixed 25min of 750r/min to get electromagnetic screen
Cover coating.
Example 3
The preparation of steam explosion products:
It weighs rice straw and is put into pulverizer and crush 30min, obtain stalk crushed material, then that stalk crushed material is packed into steam is quick-fried
In broken tank, heat-insulation pressure keeping processing 2min under conditions of pressure is 1.8MPa, temperature is 220 DEG C, the instantaneous pressure release of after treatment,
Collection obtains steam explosion products；
The preparation of self-made fill:
It (1) is in mass ratio to be packed into after 1:8 is mixed by the citric acid solution that obtained steam explosion products and mass fraction are 1%
It is 1.2MPa in pressure, temperature is high-temperature high-voltage reaction 12h under conditions of 160 DEG C in high-temperature high-pressure reaction kettle；
(2) it after to high-temperature high-voltage reaction, is separated by filtration to obtain reaction filter residue, reaction filter residue is put into baking oven, at 110 DEG C
Dry 2h, obtains dried object, and dried object is moved into retort, under nitrogen protection, is heated to 500 DEG C, heat preservation charing
2h obtains carbonizing production, as self-made fill, spare；
The preparation of reaction solution:
In mass ratio be 2:1 by mass fraction be 25% poly-vinyl alcohol solution and mass fraction be 30% 3,4- dihydroxy benzenes first
It is fitted into reaction kettle after acid solution mixing, 80 DEG C of heat temperature raising, 5h is stirred to react with the revolving speed of 400r/min, obtains reaction solution；
The preparation of modified self-made fill:
It will obtain reaction solution and spare self-made fill be 8:1 mixing in mass ratio, be fitted into reaction kettle, stir pre-reaction
20min, pre-reaction continuously add the catechol-oxydase of reaction solution quality 5% into reaction kettle after terminating, at 40 DEG C with
The revolving speed of 800r/min is stirred to react 5h, filters after reaction, isolated reaction filter cake, as modified self-made fill；
The preparation of electromagnetic screen coating:
According to parts by weight, 40 parts of polyanilines, 20 parts of epoxy resin, 15 parts of above-mentioned modified self-made fills, 0.5 part of 2- methyl are weighed
Imidazoles, 30 parts of ethyl acetate are put into colloid mill, to discharge after the revolving speed ground and mixed 30min of 800r/min to get electromagnetic screen
Cover coating.
Reference examples 1
Using common stalk fibre charcoal as reference examples
Porosity measurement is carried out to self-made fill produced by the present invention and common stalk fibre charcoal:
Porosity detection method: it is detected according to GB/T4511.1-1984 charred coal porosity measuring method；
1 porosity testing result of table
| Detection project | Example 1 | Example 2 | Example 3 | Reference examples 1 |
| The porosity (%) | 35.7 | 35.9 | 36.3 | 20.2 |
By above-mentioned detection data as it can be seen that the stalk Carbon fibe porosity produced by the present invention is bigger, it is more conducive to the suction of electromagnetic wave
Receive decaying and multiple attenuation.
Reference examples 2
Using common stalk fibre charcoal as reference examples 2
The common stalk fibre in modified self-made fill produced by the present invention and reference examples 2 is carried out between matrix resin respectively
Compatibility performance detection；
Compatibility detection method: being that 1:10 is stirred 60min by shielding filler and bisphenol A type epoxy resin in mass ratio, point
The state of lotion after Guan Cha not standing 3 days, 10 days and 30 days；
2 compatibility testing result of table
| Detection project | Example 1 | Example 2 | Example 3 | Reference examples 2 |
| Emulsion state after standing 3 days | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating |
| Emulsion state after standing 10 days | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating | Shielding material is reunited, and has no precipitating |
| Emulsion state after standing 30 days | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating | Shielding filler is uniformly dispersed, and has no precipitating | Shielding material is reunited, and precipitating is generated |
It is more preferable that compatibility between modified self-made fill and matrix resin is made in the present invention it can be seen from detection data in upper table.
Reference examples 3
It keeps other raw materials and preparation method constant, the modified self-made fill of the present invention is substituted for common stalk Carbon fibe, equally
Electromagnetic screen coating is made, and using this coating as reference examples；
Performance detection is carried out to the electromagnetism coating in electromagnetism coating and control of the invention respectively；
Testing result is as shown in table 3:
3 performance test results of table
| Detection project | Example 1 | Example 2 | Example 3 | Reference examples 3 |
| Shielding rate (dB) | Greater than 76 | Greater than 77 | Greater than 77 | Greater than 63 |
| Sheet resistance (Ω) | Less than 0.02 | Less than 0.02 | Less than 0.02 | Greater than 0.05 |
Electromagnetism coating electromagnetic shielding performance produced by the present invention is more preferable it can be seen from detection data in upper table, has wide
Application prospect.
Claims (8)
1. a kind of preparation method of electromagnetic screen coating, it is characterised in that specific preparation step are as follows:
Polyaniline, epoxy resin, modified self-made fill, 2-methylimidazole, ethyl acetate is weighed to be put into colloid mill, with 700~
Discharging is after 20~30min of revolving speed ground and mixed of 800r/min to get electromagnetic screen coating；
The preparation step of the modified self-made fill are as follows:
(1) after the 3,4- dihydroxy-benzoic acid solution mixing that the poly-vinyl alcohol solution and mass fraction that mass fraction is 25% are 30%
It is fitted into reaction kettle, 70~80 DEG C of heat temperature raising, 3~5h is stirred to react with the revolving speed of 300~400r/min, obtains reaction solution；
(2) reaction solution and self-made fill mixing will be obtained, will be fitted into reaction kettle, 15~20min of pre-reaction is stirred, pre-reaction terminates
The catechol-oxydase that reaction solution quality 5% is continuously added in backward reaction kettle, with 700~800r/min's at 30~40 DEG C
Revolving speed is stirred to react 3~5h, filters after reaction, isolated reaction filter cake, as modified self-made fill；
The preparation step of the self-made fill are as follows:
(1) it weighs rice straw and is put into 20~30min of crushing in pulverizer, obtain stalk crushed material, then stalk crushed material is filled
Enter in steam blasting tank, heat-insulation pressure keeping handles 1~2min, the instantaneous pressure release of after treatment, and collection obtains steam explosion products；
(2) high-temperature high-pressure reaction kettle is packed into after mixing the citric acid solution that obtained steam explosion products and mass fraction are 1%
In, it is 1.0~1.2MPa in pressure, temperature is 10~12h of high-temperature high-voltage reaction under conditions of 150~160 DEG C；
(3) it after to high-temperature high-voltage reaction, is separated by filtration to obtain reaction filter residue, reaction filter residue is put into baking oven, 105~
Dry 1~2h, obtains dried object at 110 DEG C, and dried object is moved into retort, under nitrogen protection, it is heated to 400~
500 DEG C, heat preservation 1~2h of charing obtains carbonizing production, as self-made fill.
2. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: in electromagnetic screen coating
According to parts by weight, polyaniline is 30~40 parts to each raw material, epoxy resin is 15~20 parts, modified self-made fill is 10~15
Part, 2-methylimidazole are 0.3~0.5 part, ethyl acetate is 25~30 parts.
3. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: the modified self-control is filled out
In the preparation step (1) of material, 3,4- dihydroxy benzenes first that the poly-vinyl alcohol solution and mass fraction that mass fraction is 25% are 30%
The mass ratio of acid solution is 2:1.
4. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: the modified self-control is filled out
In the preparation step (2) of material, the mass ratio of reaction solution and self-made fill is 8:1.
5. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: the self-made fill
It is preferably 200~220 DEG C that the pressure that heat-insulation pressure keeping is handled in preparation step (1), which is preferably 1.5~1.8MPa, temperature,.
6. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: the self-made fill
The mass ratio for the citric acid solution that steam explosion products and mass fraction are 1% in preparation step (2) is 1:8.
7. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: the self-made fill
Pectase can also be added in preparation step (2), laccase promotes the hydrolysis of fiber.
8. a kind of preparation method of electromagnetic screen coating according to claim 1, it is characterised in that: the self-made fill
The temperature of heat preservation charing can be more preferably 480~500 DEG C in preparation step (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079394.7A CN109852232A (en) | 2019-01-28 | 2019-01-28 | A kind of preparation method of electromagnetic screen coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079394.7A CN109852232A (en) | 2019-01-28 | 2019-01-28 | A kind of preparation method of electromagnetic screen coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109852232A true CN109852232A (en) | 2019-06-07 |
Family
ID=66896517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910079394.7A Withdrawn CN109852232A (en) | 2019-01-28 | 2019-01-28 | A kind of preparation method of electromagnetic screen coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109852232A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357456A (en) * | 2019-06-21 | 2019-10-22 | 游雪花 | A kind of preparation method of modified light guide concrete |
| CN110591615A (en) * | 2019-10-21 | 2019-12-20 | 李文凤 | Preparation method of water-resistant high-viscosity biomass wallpaper adhesive |
| CN112592607A (en) * | 2020-12-29 | 2021-04-02 | 成都芙涵麟涂料科技有限公司 | Preparation method of filler for conductive coating |
-
2019
- 2019-01-28 CN CN201910079394.7A patent/CN109852232A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357456A (en) * | 2019-06-21 | 2019-10-22 | 游雪花 | A kind of preparation method of modified light guide concrete |
| CN110591615A (en) * | 2019-10-21 | 2019-12-20 | 李文凤 | Preparation method of water-resistant high-viscosity biomass wallpaper adhesive |
| CN112592607A (en) * | 2020-12-29 | 2021-04-02 | 成都芙涵麟涂料科技有限公司 | Preparation method of filler for conductive coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109852232A (en) | A kind of preparation method of electromagnetic screen coating | |
| Zhang et al. | Eco-friendly flame retardant and electromagnetic interference shielding cotton fabrics with multi-layered coatings | |
| CN105062040B (en) | A kind of thermal reversion selfreparing electrostatic dissipation polyurethane film and preparation method thereof | |
| Cheng et al. | Durable electromagnetic interference (EMI) shielding ramie fabric with excellent flame retardancy and Self-healing performance | |
| CN109817385A (en) | A kind of preparation method that environment-friendly type graphene conductive carbon is starched and its application on flexible heating film | |
| CN106497339B (en) | A kind of power equipment environment-friendly fireproof material and preparation method thereof | |
| Müller et al. | Flexible PEDOT-nanocellulose composites produced by in situ oxidative polymerization for passive components in frequency filters | |
| Abdel Aziz et al. | Diglycidyl ether of bisphenol A/chitosan‐graft‐polyaniline composites with electromagnetic interference shielding properties: Synthesis, characterization, and curing kinetics | |
| CN101950597B (en) | Silver aluminum slurry for electromagnetic shielding and preparation method thereof | |
| CN114103305B (en) | high-Tg high-heat-conductivity metal-based copper-clad plate and processing technology thereof | |
| Shi et al. | Tunable construction of fire safe and mechanically strong hierarchical composites towards electromagnetic interference shielding | |
| CN107610945A (en) | A kind of preparation method of nitrogen-phosphor codoping charcoal based super capacitor electrode material | |
| CN114874624B (en) | Heat-conducting wave-absorbing room-temperature curing silicone rubber product and preparation method thereof | |
| CN110903545A (en) | Anti-aging acid-alkali-resistant cable material and preparation method thereof | |
| CN105037678A (en) | Heat-resisting polyurethane elastomer and preparation method thereof | |
| CN2917207Y (en) | Environment protective conducting material for electromagnetic shielding | |
| CN112940457B (en) | Flame-retardant epoxy electromagnetic shielding material and preparation method thereof | |
| CN102250545A (en) | High temperature resistant antistatic coating and preparation method thereof | |
| CN109294397A (en) | A kind of preparation method of rapid curing peel type anticorona varinish | |
| CN109509876A (en) | A kind of preparation process of compound cladding lithium cell cathode material | |
| Yu et al. | Thermally driven self‐healing PEDOT conductive films relying on reversible and multiple Diels–Alder interaction | |
| CN104152042A (en) | Surface insulation paint | |
| CN114195978A (en) | Polyurethane solid electrolyte and preparation method and application thereof | |
| JP2018178012A (en) | Resin modifier, resin composition, solid electrolyte, lithium ion secondary battery, and method for producing resin modifier | |
| Omrani et al. | Kinetics and thermal properties of epoxy resin cured with Ni (II)‐tris‐(O‐pheneylendiamine) bromide |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190607 |
|
| WW01 | Invention patent application withdrawn after publication |