CN107509380A - A kind of preparation method of environmental-protecting electromagnetic shielding composite - Google Patents
A kind of preparation method of environmental-protecting electromagnetic shielding composite Download PDFInfo
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- CN107509380A CN107509380A CN201710824421.XA CN201710824421A CN107509380A CN 107509380 A CN107509380 A CN 107509380A CN 201710824421 A CN201710824421 A CN 201710824421A CN 107509380 A CN107509380 A CN 107509380A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
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Abstract
The invention discloses a kind of preparation method of environmental-protecting electromagnetic shielding composite, the present invention is using addition nano-sized carbon conductive fiber material in the composite, carbon nano-fiber after graphite and processing of the nano-sized carbon conductive fiber material with the good dispersion after processing, with good capability of electromagnetic shielding, it can be easily combined with each other with other materials, there is the physical property of relative reinforcement；Meet green requirement in the selection of composite manufacturing process and raw material of the present invention.Using bamboo and wood as matrix of materials, its durability is effectively improved, alleviates the weight of material.
Description
Technical field
The present invention relates to electromagnetic shielding material manufacturing field, and in particular to a kind of preparation of environmental-protecting electromagnetic shielding composite
Method.
Background technology
With the fast development of electronics and information industry, electronic electric equipment is used widely in all trades and professions, it
While the life to people provides great convenience, also expose serious electromagnetic pollution problem.Correlative study is demonstrate,proved
Real, the electromagnetic wave that electronic electric equipment is sent can not only disturb the normal work of other instruments equipment, but also may cause letter
Breath leakage, or even be detrimental to health.Electromagnetic pollution has turned into the harm people after noise pollution, air pollution, water pollution
The fourth-largest public hazards of class existence.
Electromagnetic pollution endangers the production and living of the mankind, military development in science and technology huge, proposes that one kind can effectively shield electricity
The material of magnetic wave has very important social effect and economic implications.
High new material such as graphite and carbon nano-fiber, have proved that its conductive radiation protection ability is splendid through overtesting,
Not by external interference, reach the effect of radiation-proof anti-static, but in existing technology, it is directly that graphite dispersion is fine to fabric
In dimension, the poor dispersion of graphite, easily aggregation, so poor performance, simple carbon nano-fiber spinning moulding effect in addition
Difference, have much room for improvement.
The content of the invention
The present invention provides a kind of preparation method of environmental-protecting electromagnetic shielding composite, and the present invention uses to be added in the composite
Plus nano carbon conductive fibers material, after the nano-sized carbon conductive fiber material has graphite and the processing of the good dispersion after processing
Carbon nano-fiber, there is good capability of electromagnetic shielding, easily can be combined with each other with other materials, there is relative reinforcement
Physical property；Meet green requirement in the selection of composite manufacturing process and raw material of the present invention.Made using bamboo and wood
For matrix of materials, its durability is effectively improved, alleviates the weight of material.
To achieve these goals, the invention provides a kind of preparation method of environmental-protecting electromagnetic shielding composite, the party
Method comprises the following steps：
（1）Prepare nano-sized carbon conductive fiber material powder
Graphitic pretreatment, sodium fluoride is mixed in Nano graphite powder, and add metallic catalyst, mixed, in inert gas shielding
Under sodium fluoride is fixed in 600-650 DEG C of heating, heat time control on Nano graphite powder surface in 10-15min；
Carbon nano-fiber is pre-processed, and the Nano carbon fibers Wesy concentrated sulfuric acid is carried out with potassium permanganate to mix acid oxidase, violent through ultrasound
After stirring, the carbon nano-fiber of carboxylated is obtained, adds surface conditioning agent, heats 10-15min at 150-200 DEG C, adds
Enter silver, nitrogen and helium it is mixed gas protected under at 400-450 DEG C heat 30-45min, silver is dispersed in nano-sized carbon
In fiber；
The carbon nano-fiber of the graphite of pretreatment and pretreatment is placed in container, is dissolved, added with 150-250 parts isopropanol
Dispersant, polyphenylene sulfide, PPS resin, are blended with forced mixer, then carry out ultrasonic disperse with ultrasonic wave separating apparatus again, are surpassed
Acoustic frequency is 25-30kHz, time 1-2h, forms the nano-sized carbon conductive fiber material solution of homogeneous；
Obtained nano-sized carbon conductive fiber material solution and chemical blend thing are subjected to chemical blend, the chemical blend thing is poly-
Vinyl chloride, the mass fraction of the chemical blend thing account for the 25-30% of original solution, a nanometer carbonaceous conductive are prepared with method of electrostatic spinning
Fibrous material, ball mill grinding obtain nano-sized carbon conductive fiber material powder；
（2）According to following parts by weight dispensing:
Diisocyanate 25-29 parts
N,N methylene bis acrylamide 16-19 parts
Nano-sized carbon conductive fiber material powder 5-7.5 parts
Bamboo and woods fiber 10-15 parts
Toughener 0.5-1 parts；
（3）By the diisocyanate, N, N- methylene-bisacrylamides are dissolved in dichloromethane solvent, and it is molten to obtain macromolecule
Liquid；Nano-sized carbon conductive fiber material powder, toughener are slowly added in above-mentioned Polymer Solution, high-speed stirred, makes nanometer
Carbon conductive fibers material powder and toughener are well dispersed in Polymer Solution；Tentatively removed using the method for vacuum distillation
The solvent in mixture is stated, after being extracted twice with extractant, again using removal residual solvent is evaporated under reduced pressure, until can not detect
Untill solvent, solid powdery mixture is obtained；By solid powdery mixture obtained above and bamboo and woods fiber, using double
Screw extruder carries out melt pelletization, obtains environmental-protecting electromagnetic shielding composite.
Preferably, in nano-sized carbon conductive fiber material powder preparation process, the weight of each raw material is：Graphite 6-
8 parts, carbon nano-fiber 10-15 parts, polyphenylene sulfide 30-48 parts, PPS resin 0.5-0.8 parts, dispersant 0.5-1.0 parts, sodium fluoride
0.05-0.1 parts, metallic catalyst 0.1-0.2 parts, silver-colored 0.05-0.1 parts, surface conditioning agent 0.5-1.0 parts.
Embodiment
Embodiment one
Graphitic pretreatment, sodium fluoride is mixed in Nano graphite powder, and add metallic catalyst, mixed, in inert gas shielding
Under sodium fluoride is fixed in 600 DEG C of heating, heat time control on Nano graphite powder surface in 10min.
Carbon nano-fiber pre-processes, and the Nano carbon fibers Wesy concentrated sulfuric acid is carried out with potassium permanganate to mix acid oxidase, through ultrasound
After being stirred vigorously, the carbon nano-fiber of carboxylated is obtained, adds surface conditioning agent, heats 10min at 150 DEG C, adds
Silver, nitrogen and helium it is mixed gas protected under at 400 DEG C heat 30min, silver is dispersed in carbon nano-fiber.
The carbon nano-fiber of the graphite of pretreatment and pretreatment is placed in container, is dissolved, added with 150 parts of isopropanols
Dispersant, polyphenylene sulfide, PPS resin, are blended with forced mixer, then carry out ultrasonic disperse with ultrasonic wave separating apparatus again, are surpassed
Acoustic frequency is 25kHz, time 1h, forms the nano-sized carbon conductive fiber material solution of homogeneous.
Obtained nano-sized carbon conductive fiber material solution and chemical blend thing are subjected to chemical blend, the chemical blend thing
For polyvinyl chloride, the mass fraction of the chemical blend thing accounts for the 25% of original solution, prepares nano-sized carbon with method of electrostatic spinning and leads
Electric fibrous material, ball mill grinding obtain nano-sized carbon conductive fiber material powder.
In nano-sized carbon conductive fiber material powder preparation process, the weight of each raw material is：Graphite 6 part, nanometer
10 parts of carbon fiber, 30 parts of polyphenylene sulfide, 0.5 part of PPS resin, 0.5 part of dispersant, 0.05 part of sodium fluoride, metallic catalyst 0.1
Part, silver-colored 0.05 part, 0.5 part of surface conditioning agent.
According to following parts by weight dispensing:
25 parts of diisocyanate
16 parts of N,N methylene bis acrylamide
5 parts of nano-sized carbon conductive fiber material powder
10 parts of bamboo and woods fiber
0.5 part of toughener.
By the diisocyanate, N, N- methylene-bisacrylamides are dissolved in dichloromethane solvent, obtain macromolecule
Solution；Nano-sized carbon conductive fiber material powder, toughener are slowly added in above-mentioned Polymer Solution, high-speed stirred, makes to receive
Rice carbon conductive fibers material powder and toughener are well dispersed in Polymer Solution；Tentatively removed using the method for vacuum distillation
Solvent in said mixture, after being extracted twice with extractant, again using removal residual solvent is evaporated under reduced pressure, until can not examine
Untill measuring solvent, solid powdery mixture is obtained；By solid powdery mixture obtained above and bamboo and woods fiber, use
Double screw extruder carries out melt pelletization, obtains environmental-protecting electromagnetic shielding composite.
Embodiment two
Graphitic pretreatment, sodium fluoride is mixed in Nano graphite powder, and add metallic catalyst, mixed, in inert gas shielding
Under sodium fluoride is fixed in 650 DEG C of heating, heat time control on Nano graphite powder surface in 15min.
Carbon nano-fiber pre-processes, and the Nano carbon fibers Wesy concentrated sulfuric acid is carried out with potassium permanganate to mix acid oxidase, through ultrasound
After being stirred vigorously, the carbon nano-fiber of carboxylated is obtained, adds surface conditioning agent, heats 15min at 200 DEG C, adds
Silver, nitrogen and helium it is mixed gas protected under at 450 DEG C heat 45min, silver is dispersed in carbon nano-fiber.
The carbon nano-fiber of the graphite of pretreatment and pretreatment is placed in container, is dissolved, added with 250 parts of isopropanols
Dispersant, polyphenylene sulfide, PPS resin, are blended with forced mixer, then carry out ultrasonic disperse with ultrasonic wave separating apparatus again, are surpassed
Acoustic frequency is 30kHz, time 2h, forms the nano-sized carbon conductive fiber material solution of homogeneous.
Obtained nano-sized carbon conductive fiber material solution and chemical blend thing are subjected to chemical blend, the chemical blend thing
For polyvinyl chloride, the mass fraction of the chemical blend thing accounts for the 30% of original solution, prepares nano-sized carbon with method of electrostatic spinning and leads
Electric fibrous material, ball mill grinding obtain nano-sized carbon conductive fiber material powder.
In nano-sized carbon conductive fiber material powder preparation process, the weight of each raw material is：Graphite 8 part, nanometer
15 parts of carbon fiber, 48 parts of polyphenylene sulfide, 0.8 part of PPS resin, 1.0 parts of dispersant, 1 part of sodium fluoride, 0.2 part of metallic catalyst, silver
0.1 part, 1.0 parts of surface conditioning agent.
According to following parts by weight dispensing:
29 parts of diisocyanate
19 parts of N,N methylene bis acrylamide
7.5 parts of nano-sized carbon conductive fiber material powder
15 parts of bamboo and woods fiber
1 part of toughener.
By the diisocyanate, N, N- methylene-bisacrylamides are dissolved in dichloromethane solvent, obtain macromolecule
Solution；Nano-sized carbon conductive fiber material powder, toughener are slowly added in above-mentioned Polymer Solution, high-speed stirred, makes to receive
Rice carbon conductive fibers material powder and toughener are well dispersed in Polymer Solution；Tentatively removed using the method for vacuum distillation
Solvent in said mixture, after being extracted twice with extractant, again using removal residual solvent is evaporated under reduced pressure, until can not examine
Untill measuring solvent, solid powdery mixture is obtained；By solid powdery mixture obtained above and bamboo and woods fiber, use
Double screw extruder carries out melt pelletization, obtains environmental-protecting electromagnetic shielding composite.
Claims (2)
1. a kind of preparation method of environmental-protecting electromagnetic shielding composite, this method comprise the following steps：
（1）Prepare nano-sized carbon conductive fiber material powder
Graphitic pretreatment, sodium fluoride is mixed in Nano graphite powder, and add metallic catalyst, mixed, in inert gas shielding
Under sodium fluoride is fixed in 600-650 DEG C of heating, heat time control on Nano graphite powder surface in 10-15min；
Carbon nano-fiber is pre-processed, and the Nano carbon fibers Wesy concentrated sulfuric acid is carried out with potassium permanganate to mix acid oxidase, violent through ultrasound
After stirring, the carbon nano-fiber of carboxylated is obtained, adds surface conditioning agent, heats 10-15min at 150-200 DEG C, adds
Enter silver, nitrogen and helium it is mixed gas protected under at 400-450 DEG C heat 30-45min, silver is dispersed in nano-sized carbon
In fiber；
The carbon nano-fiber of the graphite of pretreatment and pretreatment is placed in container, is dissolved, added with 150-250 parts isopropanol
Dispersant, polyphenylene sulfide, PPS resin, are blended with forced mixer, then carry out ultrasonic disperse with ultrasonic wave separating apparatus again, are surpassed
Acoustic frequency is 25-30kHz, time 1-2h, forms the nano-sized carbon conductive fiber material solution of homogeneous；
Obtained nano-sized carbon conductive fiber material solution and chemical blend thing are subjected to chemical blend, the chemical blend thing is poly-
Vinyl chloride, the mass fraction of the chemical blend thing account for the 25-30% of original solution, a nanometer carbonaceous conductive are prepared with method of electrostatic spinning
Fibrous material, ball mill grinding obtain nano-sized carbon conductive fiber material powder；
（2）According to following parts by weight dispensing:
Diisocyanate 25-29 parts
N,N methylene bis acrylamide 16-19 parts
Nano-sized carbon conductive fiber material powder 5-7.5 parts
Bamboo and woods fiber 10-15 parts
Toughener 0.5-1 parts；
（3）By the diisocyanate, N, N- methylene-bisacrylamides are dissolved in dichloromethane solvent, and it is molten to obtain macromolecule
Liquid；Nano-sized carbon conductive fiber material powder, toughener are slowly added in above-mentioned Polymer Solution, high-speed stirred, makes nanometer
Carbon conductive fibers material powder and toughener are well dispersed in Polymer Solution；Tentatively removed using the method for vacuum distillation
The solvent in mixture is stated, after being extracted twice with extractant, again using removal residual solvent is evaporated under reduced pressure, until can not detect
Untill solvent, solid powdery mixture is obtained；By solid powdery mixture obtained above and bamboo and woods fiber, using double
Screw extruder carries out melt pelletization, obtains environmental-protecting electromagnetic shielding composite.
2. the method as described in claim 1, in nano-sized carbon conductive fiber material powder preparation process, the parts by weight of each raw material
Match and be：Graphite 6-8 parts, carbon nano-fiber 10-15 parts, polyphenylene sulfide 30-48 parts, PPS resin 0.5-0.8 parts, dispersant
0.5-1.0 parts, sodium fluoride 0.05-0.1 parts, metallic catalyst 0.1-0.2 parts, silver-colored 0.05-0.1 parts, surface conditioning agent 0.5-1.0
Part.
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| CN201710824421.XA CN107509380A (en) | 2017-09-13 | 2017-09-13 | A kind of preparation method of environmental-protecting electromagnetic shielding composite |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942134A (en) * | 2010-09-06 | 2011-01-12 | 四川大学 | Method for preparing anisotropic conductive polymer composite |
| CN104562698A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method of sizing agent of carbon fibers for reinforcement of thermoplastic resin |
| US20150197641A1 (en) * | 2014-01-16 | 2015-07-16 | Jun-young Choi | Cavitation resistant polyurethane compositions and methods of forming coating films using the same |
| CN105177745A (en) * | 2015-08-31 | 2015-12-23 | 贵州省纤维检验局 | Novel electromagnetic shielding nanocarbon conductive fibrous material and preparation method thereof |
| CN105619916A (en) * | 2015-12-25 | 2016-06-01 | 北京化工大学 | Nano-toughened carbon fiber composite material and preparation method thereof |
-
2017
- 2017-09-13 CN CN201710824421.XA patent/CN107509380A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942134A (en) * | 2010-09-06 | 2011-01-12 | 四川大学 | Method for preparing anisotropic conductive polymer composite |
| CN104562698A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method of sizing agent of carbon fibers for reinforcement of thermoplastic resin |
| US20150197641A1 (en) * | 2014-01-16 | 2015-07-16 | Jun-young Choi | Cavitation resistant polyurethane compositions and methods of forming coating films using the same |
| CN105177745A (en) * | 2015-08-31 | 2015-12-23 | 贵州省纤维检验局 | Novel electromagnetic shielding nanocarbon conductive fibrous material and preparation method thereof |
| CN105619916A (en) * | 2015-12-25 | 2016-06-01 | 北京化工大学 | Nano-toughened carbon fiber composite material and preparation method thereof |
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