CN107523939A - A kind of ultrathin flexible electromagnetic shielding film and preparation method thereof - Google Patents
A kind of ultrathin flexible electromagnetic shielding film and preparation method thereof Download PDFInfo
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- CN107523939A CN107523939A CN201610452875.4A CN201610452875A CN107523939A CN 107523939 A CN107523939 A CN 107523939A CN 201610452875 A CN201610452875 A CN 201610452875A CN 107523939 A CN107523939 A CN 107523939A
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- electromagnetic shielding
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/08—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyacrylonitrile as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
Abstract
The invention discloses a kind of ultrathin flexible electromagnetic shielding film and preparation method thereof.The present invention prepares conductive-nano-fibers film by electrostatic spinning technique, and product is made up of fibre-forming polymer and functional nanoparticles；Or it is made up of fibre-forming polymer, conducting polymer and functional nanoparticles.Due in fiber doped with functional nanoparticles so that ultrathin flexible electromagnetic shielding film has good screening ability to height frequency electromagnetic waves under lower thickness；The product of the present invention is made by electrostatic spinning process, and product flexible touch is comfortable, does not fear washing；Product thickness is thin, flexible, has a wide range of application, almost can be mutually compound with any material, without influenceing its physical property and size.
Description
Technical field
The present invention relates to a kind of electromagnetic shielding film, more particularly to a kind of ultrathin flexible electromagnetic shielding film and preparation method thereof.
Background technology
Electromagnetic wave includes medicine equipment, the horses such as mobile phone, satellite communication, aircraft, spacecraft, railway accident detection, X ray
Reaching, engine, motor, permanent magnet, electromagnetic oven etc., these electromagnetic waves can produce interference to the equipment using magnetic field work,
The normal use of electronic product is influenceed, turns into a kind of new pollution sources-electromagnetic pollution after three big pollutions.Through medical research
Prove, electromagnetic radiation caused by electronic product or electrical equipment etc. can all produce different degrees of danger to each organ of human body, tissue, system
Evil：Headache, insomnia, amnesia, blood pressure rise or declines, heart boundary sexual abnormality etc., serious more likely causes adult's evil
The generation of property brain tumor, ALS, miscarriage, cataract, neurasthenia, depression and adult leukemia, cancer etc.,
Therefore increasingly weighed in the today paid attention to further health, the good electromagnetic shielding of the equipment progress to correlation
Depending on.On the other hand, in ECM, electromagnetic-wave leakage will also result in divulging a secret for information, jeopardize national economy, information and
The safety of military vital strategic secrets.
Frequency electromagnetic waves shielding mechanism is mainly that electromagnetic induction produces reversely vortex, is suppressed by opposing magnetic field or offset real
Now it is electromagnetically shielded, it is only necessary to improve material conductivity and be just easily achieved；It is main but low-frequency electromagnetic wave electromagnetic induction is relatively weak
Electromagnetic shielding is realized by the ground magnetic resistance channel interior decay mechanism that high permeability materials are formed, in order to realize low-frequency electromagnetic wave
The purpose of shielding generally requires higher magnetic conductivity and thickness, complex manufacturing technology, and cost is higher；
The present invention uses functional nanoparticles as packing material, because the physical dimension of nano material is in nanometer amount
Level, quantum size effect and skin effect of material etc. have a major impact to material property, such as the electrical conductivity of nano material
Very low, as nano-grain size reduces, the specific saturation magnetization of material declines, but magnetic susceptibility and coercivity are all drastically
Rise.The nanoscale Ultramicro-powder of metal, metal oxide and some nonmetallic materials is in thinning process, the atom in surface
Number is more and more, increases the activity of nano material, therefore under the radiation of microwave field, atom, electron motion aggravation, promotes magnetic
Change, it is heat energy to make electromagnetic energy, so as to be added significantly to the absorbent properties to low-frequency electromagnetic wave.
The U.S. has been developed that the 4th generation nano wave-absorbing material " super ink powder ", and its absorptivity to radar wave is up to 99%.The U.S.
It is 1.5%, draw ratio ＞ 100 CNT that patent report adds mass fraction in resin, this thickness 1mm, density
For 1.2-1.4g/cm3Thin-film material have to 20kHz~1.5GHz wide band electromagnetic wave and preferably absorb, can absorb
86% 1.5GHz electromagnetic wave.The material has broad application prospects in civil area.But coating 1mm thickness, limit
To make it and utilize field, conventional fitment material for family seldom possesses the coating that 1mm is even much larger than 1mm, this resin composite materials,
Also it is difficult to use in vegetable material；Brunswick companies of U.S. shielding material made of stainless steel fibre does conductive filler
Shield effectiveness is fine, and with a diameter of 7um superfine stainless steel fibre, loading accounts for the 6% of quality, and its SE value is up to 40dB.But
The shortcomings that such composite is that the problems such as winding fractures is also easy to produce in forming process, when doing textile material, such as maternity dress,
Rigid fiber frangibility, stimulation is produced to skin, can not also be cleaned；Tianjin University of Technology patent CN105200658 leads to
Cross and graphite powder is added into electrostatic spinning liquid so as to which the electric conductivity of electrostatic spinning layer, nanofiber membrane conductivity greatly improved
Reach surprising 1 × 10-8-1.5×100S/cm, only with adding a small amount of graphite powder in electrostatic spinning liquid in practical operation
It is difficult to reach 1 × 100S/cm electrical conductivity, associated shield efficiency are only (and the reckoning only under 100Hz frequencies of formula to calculating value
Value), lack related data and support.Single nano fibrous membrane mechanical strength is poor, restricted application.
Traditional electromagnetic shielding with absorbing material it is emphasised that strong decay, excellent for frequency electromagnetic waves shield effectiveness, but
It is that low-frequency electromagnetic wave shield effectiveness is poor, it is difficult to be satisfied with varying environment and the demand of application scenario；Product flexibility is poor, can not water
Wash, be difficult to widespread adoption in daily life field, such as house ornamentation and field of textiles, conventional material such as maternity dress is rigid
Fiber frangibility, stimulation is produced to skin, can not also be cleaned；Electromagnetic shielding film or related coatings are thicker so far,
It is difficult to effectively compound with traditional material, and has little influence on the size and function of material；Routine intravenous electro-spun layer doped graphite powder,
It is difficult to reach very high electrical conductivity, effectiveness is poor.
The content of the invention
It is an object of the invention to provide a kind of ultrathin flexible electromagnetic shielding film and preparation method thereof.
Scheme one：
A kind of ultrathin flexible electromagnetic shielding film, is made up of fibre-forming polymer and functional nanoparticles.
The functional nanoparticles include electrical-conductive nanometer material and soft magnetic bodies nano material；
The electrical-conductive nanometer material be graphite powder, graphene, CNT, carbon nanohorn, carbon fiber, Nano metal powder,
One or more in Nano semiconductor powder；
The soft magnetic bodies nano material is the one or more in ferro-silicium, magnetically soft alloy, soft magnetic ferrite.
The fibre-forming polymer includes water soluble polymer and water-insoluble macromolecule, water soluble polymer be gelatin and/
Or polyethylene glycol oxide and/or polyvinyl alcohol；Water-insoluble macromolecule is polyacrylonitrile, PLA, chitosan, polyvinyl alcohol contracting fourth
Aldehyde, ethylene glycol terephthalate, polybutylene terephthalate (PBT), polymethyl methacrylate, polystyrene, polyvinylidene fluoride
It is alkene, poly terephthalic acid p-phenylenediamine, poly- M-phthalic acid m-phenylene diamine (MPD), polyurethane, polyurethanes, polyvinyl chloride, poly-
One or more in acid amides.
Scheme two：
A kind of ultrathin flexible electromagnetic shielding film, by fibre-forming polymer, conducting polymer and functional nanoparticles are made.
The conducting polymer is polyacetylene or polyaniline.
The fibre-forming polymer dissolves in the solvent of conducting polymer, or its solvent can be mutual with the solvent of conducting polymer
It is molten；Selected from gelatin, polyethylene glycol oxide, polyvinyl alcohol, polyacrylonitrile, polyvinyl butyral resin, ethylene glycol terephthalate, poly-
It is mutual-phenenyl two acid bromide two alcohol ester, PLA, chitosan, polymethyl methacrylate, Kynoar, polystyrene, poly- to benzene
One in dioctyl phthalate p-phenylenediamine, poly- M-phthalic acid m-phenylene diamine (MPD), polyurethane, polyurethanes, polyvinyl chloride, polyamide
Kind or more than one.
The functional nanoparticles include electrical-conductive nanometer material and soft magnetic bodies nano material；
The electrical-conductive nanometer material be graphite powder, graphene, CNT, carbon nanohorn, carbon fiber, Nano metal powder,
One or more in Nano semiconductor powder；
The soft magnetic materials is the one or more in ferro-silicium, magnetically soft alloy, soft magnetic ferrite.
A kind of preparation method of ultrathin flexible electromagnetic shielding film, fibre-forming polymer is dissolved in solvent, then to the inside
Functional nanoparticles, magnetic agitation and ultrasonic disperse are added, spinning solution is made, is prepared using electrostatic spinning apparatus by above-mentioned
Spinning solution carry out spinning, composite nano-fiber membrane is made, by the composite nano-fiber membrane prepared electroplated or chemistry
Product is made in plating, vacuum drying.
A kind of preparation method of ultrathin flexible electromagnetic shielding film, fibre-forming polymer and conducting polymer is dissolved separately in molten
In agent, after being well mixed, functional nanoparticles, magnetic agitation and ultrasonic disperse are added, spinning solution is made, utilizes electrostatic spinning
The above-mentioned spinning solution prepared is carried out spinning by device, prepares compound sodium rice tunica fibrosa, is dried in vacuo and product is made.
During electrostatic spinning, according to skill of handling needles spinning, it is 15-25cm to receive distance, applies voltage 25kV, spinning speed 2mL/
h；According to wire or metal dish method spinning, apply voltage 40-100kV, feeding speed 40-1000mL.
Beneficial effects of the present invention：The present invention prepares conductive-nano-fibers by electrostatic spinning technique, and in the fibre
Adulterate functional nanoparticles so that ultrathin flexible electromagnetic shielding film has good under lower thickness to height frequency electromagnetic waves
Good screening ability；Textile material at present more doping metals silks and reach electromagnetic shielding purpose, in daily life field, such as family
Dress and field of textiles are difficult to widespread adoption, conventional material such as maternity dress, rigid fiber frangibility, thorn are produced to skin
Swash, product of the invention is made by electrostatic spinning process, and product flexible touch is comfortable, does not fear washing；Product thickness is thin, flexible
It is good, have a wide range of application, almost can be mutually compound with any material, without influenceing its physical property and size.
Embodiment
With reference to specific embodiment, the present invention will be further described.
Embodiment 1
Certain mass polyacrylonitrile (PAN) is weighed, puts it into conical flask and is slowly added to NN- dimethylformamide DMF,
4h is continuously stirred with magnetic stirring apparatus under the conditions of 80 DEG C, the PAN solution that mass fraction is 10wt% is obtained, then adds inwards
A certain amount of doped hydrochloride polyaniline powder (PANI-HCl) and soft magnetic ferrite powder, magnetic agitation 12h under normal temperature condition, and
Ultrasonic disperse 30min, spinning solution is made, wherein PANI-HCl contents are 15wt%, and soft magnetic ferrite content is 5wt%；Utilize
The above-mentioned spinning solution prepared is carried out spinning by electrostatic spinning apparatus, and it is 18cm to receive distance, applies voltage 25kV, is spinning speed
Spend 2mL/h；The composite nanometer fiber felt prepared is positioned in vacuum drying chamber and dries obtained product.
When electrostatic spinning layer is using fabric or window screening as base material, product can be directly as maternity dress fabric or electromagnetism
Shield window screening bed curtain.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 95-97% electromagnetic shielding rate for low frequency electromagnetic wave material, high frequency is relatively poor, shielding rate 80-85%.
Embodiment 2
Certain mass PVAC polyvinylalcohol is weighed, under the conditions of 90 DEG C 4h is continuously stirred with magnetic stirring apparatus using water as solvent,
The PVA solution that mass fraction is 10wt% is obtained, then adds a certain amount of soft magnetic ferrite powder inwards, magnetic under normal temperature condition
Power stirs 12h, and ultrasonic disperse 30min, spinning solution is made, wherein soft magnetic ferrite content is 8wt%；Filled using electrostatic spinning
Put and the above-mentioned spinning solution prepared is subjected to spinning, it is 18cm to receive distance, applies voltage 25kV, is spinning speed 2mL/h；Will
The composite nano-fiber membrane prepared is electroplated or chemical plating, is dried in vacuo and product is made.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 90-93% electromagnetic shielding rate for low frequency electromagnetic wave material, high frequency is relatively preferable, shielding rate 95-99%.
Embodiment 3
Certain mass polyethylene glycol oxide (PEO) is weighed, puts it into and chloroform is slowly added in conical flask, under the conditions of 80 DEG C
4h is continuously stirred with magnetic stirring apparatus, the PEO solution that mass fraction is 10wt% is obtained, then adds a certain amount of hydrochloric acid inwards
Doped polyacetylene powder and ferro-silicium, magnetic agitation 12h under normal temperature condition, and ultrasonic disperse 30min, are made spinning solution, its
Middle doped hydrochloride polyacetylene content of powder is 15wt%, and ferro-silicium content is 5wt%；Matched somebody with somebody using electrostatic spinning apparatus by above-mentioned
The spinning solution made carries out spinning, and it is 18cm to receive distance, applies voltage 25kV, is spinning speed 2mL/h；Answered what is prepared
Close nanofiber mats and be positioned in vacuum drying chamber dry obtained product.
When electrostatic spinning layer is using fabric or window screening as base material, product can be directly as maternity dress fabric or electromagnetism
Shield window screening bed curtain.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 95-97% electromagnetic shielding rate for low frequency electromagnetic wave material, radioshielding rate is 88-90%.
Embodiment 4
Certain mass polyethylene glycol oxide (PEO) is weighed, is continuously stirred with magnetic stirring apparatus under the conditions of 90 DEG C using water as solvent
4h is mixed, the PEO solution that mass fraction is 10wt% is obtained, then adds a certain amount of soft-magnetic alloy powder, normal temperature condition inwards
Lower magnetic agitation 12h, and ultrasonic disperse 30min, spinning solution is made, wherein magnetically soft alloy content is 8wt%；Utilize electrostatic spinning
The above-mentioned spinning solution prepared is carried out spinning by device, and it is 18cm to receive distance, is applied voltage 25kV, is spinning speed 2mL/h；
The composite nano-fiber membrane prepared is electroplated or product is made in chemical plating, vacuum drying.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 90-91% electromagnetic shielding rate for low frequency electromagnetic wave material, high frequency is relatively preferable, shielding rate 93-96%.
Embodiment 5
Certain mass polyacrylonitrile (PAN) is weighed, puts it into conical flask and is slowly added to NN- dimethylformamide DMF,
4h is continuously stirred with magnetic stirring apparatus under the conditions of 80 DEG C, the PAN solution that mass fraction is 10wt% is obtained, then adds inwards
A certain amount of doped hydrochloride polyaniline powder (PANI-HCl), lapis lazuli powder and soft magnetic ferrite powder, magnetic under normal temperature condition
Power stirs 12h, and ultrasonic disperse 30min, is made spinning solution, and wherein PANI-HCl contents are 15wt%, soft magnetic ferrite content
For 5wt%, lapis lazuli content of powder is 1wt%；The above-mentioned spinning solution prepared is subjected to spinning using electrostatic spinning apparatus, connect
It is 18cm to receive distance, applies voltage 25kV, is spinning speed 2mL/h；The composite nanometer fiber felt prepared is positioned over vacuum
Obtained product is dried in drying box.
When electrostatic spinning layer is using fabric or window screening as base material, product can be directly as maternity dress fabric or electromagnetism
Shield window screening bed curtain.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 97-99% electromagnetic shielding rate for low frequency electromagnetic wave material, high frequency is relatively poor, shielding rate 97-99%.
Embodiment 6
Certain mass PVAC polyvinylalcohol is weighed, under the conditions of 90 DEG C 4h is continuously stirred with magnetic stirring apparatus using water as solvent,
The PVA solution that mass fraction is 10wt% is obtained, then adds a certain amount of soft magnetic ferrite powder inwards, obsidian powder,
Magnetic agitation 12h under normal temperature condition, and ultrasonic disperse 30min, spinning solution is made, wherein soft magnetic ferrite content is 8wt%, black
Sunlight stone content is 1wt%；The above-mentioned spinning solution prepared is subjected to spinning using electrostatic spinning apparatus, it is 18cm to receive distance,
Apply voltage 25kV, be spinning speed 2mL/h；The composite nano-fiber membrane prepared is electroplated or chemical plating,
Product is made in vacuum drying.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 98-99% electromagnetic shielding rate for low frequency electromagnetic wave material, high frequency is relatively preferable, shielding rate 98-99.9%.
Comparative example 1
Certain mass polyacrylonitrile (PAN) is weighed, puts it into conical flask and is slowly added to NN- dimethylformamide DMF,
4h is continuously stirred with magnetic stirring apparatus under the conditions of 80 DEG C, the PAN solution that mass fraction is 10wt% is obtained, then adds inwards
A certain amount of doped hydrochloride polyaniline powder (PANI-HCl), magnetic agitation 12h under normal temperature condition, and ultrasonic disperse 30min, system
Spinning solution is obtained, wherein PANI-HCl contents are 15wt%；The above-mentioned spinning solution prepared is spun using electrostatic spinning apparatus
Silk, it is 18cm to receive distance, applies voltage 25kV, is spinning speed 2mL/h；The composite nanometer fiber felt prepared is positioned over
Obtained product is dried in vacuum drying chamber.
When electrostatic spinning layer is using fabric or window screening as base material, product can be directly as maternity dress fabric or electromagnetism
Shield window screening bed curtain.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 21-25% electromagnetic shielding rate for low frequency electromagnetic wave material, radioshielding rate is 31-34%.
Comparative example 2
Certain mass PVAC polyvinylalcohol is weighed, under the conditions of 90 DEG C 4h is continuously stirred with magnetic stirring apparatus using water as solvent,
The PVA solution that mass fraction is 10wt% is obtained, spinning solution is made；Using electrostatic spinning apparatus by the above-mentioned spinning solution prepared
Spinning is carried out, it is 18cm to receive distance, applies voltage 25kV, is spinning speed 2mL/h；The composite nano-fiber membrane that will be prepared
Electroplated or product is made in chemical plating, vacuum drying.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 25-26% electromagnetic shielding rate for low frequency electromagnetic wave material, radioshielding rate is 21-22%.
Comparative example 3
Certain mass PVAC polyvinylalcohol is weighed, under the conditions of 90 DEG C 4h is continuously stirred with magnetic stirring apparatus using water as solvent,
Obtain the PVA solution that mass fraction is 10wt%；Then the graphite powder of 5 mass parts coupling agent treatments, sick ultrasonic disperse are added
12h, spinning solution is made；The above-mentioned spinning solution prepared is subjected to spinning using electrostatic spinning apparatus, it is 18cm to receive distance, is applied
Making alive 25kV, it is spinning speed 2mL/h；The composite Nano fibre film prepared is dried in vacuo product is made.
Using vector network analyzer, working frequency 30kHz-500MHz, the electromagnetic material of preparation is tested, as a result
It was found that there is 25-26% electromagnetic shielding rate for low frequency electromagnetic wave material, radioshielding rate is 35-47%.
Claims (9)
1. a kind of ultrathin flexible electromagnetic shielding film, it is characterised in that be made up of fibre-forming polymer and functional nanoparticles.
2. ultrathin flexible electromagnetic shielding film according to claim 1, it is characterised in that the functional nanoparticles include leading
Electric nano material and/or soft magnetic bodies nano material；
The electrical-conductive nanometer material is graphite powder, graphene, CNT, carbon nanohorn, carbon fiber, Nano metal powder, nanometer
One or more in semiconductor powder；
The soft magnetic bodies nano material is the one or more in ferro-silicium, magnetically soft alloy, soft magnetic ferrite.
3. ultrathin flexible electromagnetic shielding film according to claim 1, it is characterised in that the fibre-forming polymer includes water solubility
Macromolecule and water-insoluble macromolecule, water soluble polymer are gelatin and/or polyethylene glycol oxide and/or polyvinyl alcohol；It is non-aqueous
Property macromolecule be polyacrylonitrile, it is polyvinyl butyral resin, ethylene glycol terephthalate, polybutylene terephthalate (PBT), poly-
Lactic acid, chitosan, polymethyl methacrylate, polystyrene, Kynoar, poly terephthalic acid p-phenylenediamine, poly- isophthalic
One or more in dioctyl phthalate m-phenylene diamine (MPD), polyurethane, polyurethanes, polyvinyl chloride, polyamide.
A kind of 4. ultrathin flexible electromagnetic shielding film, it is characterised in that by fibre-forming polymer, conducting polymer and functional nano grain
Son is made.
5. ultrathin flexible electromagnetic shielding film according to claim 4, it is characterised in that the conducting polymer be polyacetylene or
Polyaniline.
6. ultrathin flexible electromagnetic shielding film according to claim 4, it is characterised in that the fibre-forming polymer dissolves in conduction
The solvent of polymer, or its solvent can dissolve each other with the solvent of conducting polymer；Selected from polyethylene glycol oxide, gelatin, polyvinyl alcohol,
Polyacrylonitrile, PLA, chitosan, polyvinyl butyral resin, ethylene glycol terephthalate, polybutylene terephthalate
Ester, polymethyl methacrylate, Kynoar, polystyrene, poly terephthalic acid p-phenylenediamine, poly- M-phthalic acid isophthalic
One or more in diamines, polyurethane, polyurethanes, polyvinyl chloride, polyamide.
7. ultrathin flexible electromagnetic shielding film according to claim 4, it is characterised in that the functional nanoparticles include leading
Electric nano material and/or soft magnetic bodies nano material；
The electrical-conductive nanometer material is graphite powder, graphene, CNT, carbon nanohorn, carbon fiber, Nano metal powder, nanometer
One or more in semiconductor powder；
The soft magnetic materials is the one or more in ferro-silicium, magnetically soft alloy, soft magnetic ferrite.
8. a kind of preparation method of ultrathin flexible electromagnetic shielding film, it is characterised in that fibre-forming polymer is dissolved in solvent, so
Backward the inside adds functional nanoparticles, magnetic agitation and ultrasonic disperse, and spinning solution is made, will be upper using electrostatic spinning apparatus
State the spinning solution prepared and carry out spinning, composite nano-fiber membrane is made, the composite nano-fiber membrane prepared is electroplated
Or product is made in chemical plating, vacuum drying.
9. a kind of preparation method of ultrathin flexible electromagnetic shielding film, it is characterised in that by fibre-forming polymer and conducting polymer point
It is not dissolved in solvent, after being well mixed, adds functional nanoparticles, magnetic agitation and ultrasonic disperse, spinning solution, profit is made
The above-mentioned spinning solution prepared is subjected to spinning with electrostatic spinning apparatus, prepares compound sodium rice tunica fibrosa, vacuum drying is made
Product.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109438980A (en) * | 2018-09-26 | 2019-03-08 | 南京大学 | A kind of light absorber and preparation method thereof |
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| CN111155239A (en) * | 2019-12-30 | 2020-05-15 | 东华大学 | Preparation method of electrostatic spinning polyimide/MXene electromagnetic shielding film |
| CN111379049A (en) * | 2018-12-27 | 2020-07-07 | 苏州迪塔杉针织有限公司 | Preparation method of conductive fiber for mobile phone touch screen gloves |
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| CN112300726A (en) * | 2020-11-16 | 2021-02-02 | 张家港保税区汇英聚福材料科技合伙企业(有限合伙) | Electromagnetic shielding adhesive tape |
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| CN110158193A (en) * | 2018-04-12 | 2019-08-23 | 济南开发区星火科学技术研究院 | The preparation method of high molecular material based on modified graphene |
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| CN109438980A (en) * | 2018-09-26 | 2019-03-08 | 南京大学 | A kind of light absorber and preparation method thereof |
| CN109468701A (en) * | 2018-10-19 | 2019-03-15 | 南通纺织丝绸产业技术研究院 | Electrostatic spinning apparatus, orientation Fe3O4/ Gr/PAN composite conducting nanofiber and preparation method thereof |
| CN111379049A (en) * | 2018-12-27 | 2020-07-07 | 苏州迪塔杉针织有限公司 | Preparation method of conductive fiber for mobile phone touch screen gloves |
| CN109651641B (en) * | 2019-01-03 | 2021-10-08 | 孙斌 | Preparation method of multilayer nano electromagnetic shielding composite film |
| CN109651641A (en) * | 2019-01-03 | 2019-04-19 | 莫爱军 | A kind of preparation method of multi-layer nano electromagnetic shielding composite material |
| CN109808267A (en) * | 2019-01-31 | 2019-05-28 | 常德力元新材料有限责任公司 | A kind of electromagnetic shielding composite material and preparation method thereof |
| CN109808267B (en) * | 2019-01-31 | 2021-01-29 | 常德力元新材料有限责任公司 | Electromagnetic shielding composite material and preparation method thereof |
| WO2020155845A1 (en) * | 2019-01-31 | 2020-08-06 | 常德力元新材料有限责任公司 | Electromagnetic shielding composite material and preparation method therefor |
| CN109776830A (en) * | 2019-03-05 | 2019-05-21 | 中原工学院 | A kind of polyurethane/carboxymethyl chitosan/PAn conducting membrane preparation method |
| CN109776830B (en) * | 2019-03-05 | 2021-09-17 | 中原工学院 | Preparation method of polyurethane/carboxymethyl chitosan/polyaniline conductive film |
| CN111020815A (en) * | 2019-11-29 | 2020-04-17 | 江苏金太阳纺织科技股份有限公司 | Quilt core fabric with electromagnetic wave shielding, permanent flame retardance and no molten drops and preparation method thereof |
| CN111155239A (en) * | 2019-12-30 | 2020-05-15 | 东华大学 | Preparation method of electrostatic spinning polyimide/MXene electromagnetic shielding film |
| CN111625149B (en) * | 2020-06-03 | 2024-04-16 | 上海天马微电子有限公司 | Conductive shielding module, manufacturing method thereof and display device |
| CN111625149A (en) * | 2020-06-03 | 2020-09-04 | 上海天马微电子有限公司 | Conductive shielding module, manufacturing method thereof and display device |
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| CN112251914B (en) * | 2020-10-27 | 2022-02-08 | 中原工学院 | High-temperature-resistant composite nanofiber membrane for preparing piezoelectric material and preparation method thereof |
| CN112300726A (en) * | 2020-11-16 | 2021-02-02 | 张家港保税区汇英聚福材料科技合伙企业(有限合伙) | Electromagnetic shielding adhesive tape |
| CN113043686A (en) * | 2021-03-24 | 2021-06-29 | 广东思泉新材料股份有限公司 | Electromagnetic shielding composite film with sandwich structure and preparation method thereof |
| CN113100773A (en) * | 2021-04-12 | 2021-07-13 | 中国科学院深圳先进技术研究院 | Method for preparing fiber membrane dry electrode by directly spinning on skin |
| CN113755018A (en) * | 2021-09-30 | 2021-12-07 | 哈尔滨工业大学（深圳） | Flexible electromagnetic shielding material and preparation method and application thereof |
| CN114045595A (en) * | 2021-11-02 | 2022-02-15 | 广东鹏运实业有限公司 | Antistatic and anti-electromagnetic radiation composite fabric and preparation method thereof |
| CN114150496A (en) * | 2021-11-15 | 2022-03-08 | 吉林大学 | Flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performances and preparation method thereof |
| CN114150496B (en) * | 2021-11-15 | 2023-07-28 | 吉林大学 | Flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performances and preparation method thereof |
| CN114775297A (en) * | 2022-03-29 | 2022-07-22 | 中国科学院合肥物质科学研究院 | Insulating heat-conducting-electromagnetic shielding composite material and preparation method and application thereof |
| CN114775297B (en) * | 2022-03-29 | 2023-05-05 | 中国科学院合肥物质科学研究院 | Insulating heat conduction-electromagnetic shielding composite material and preparation method and application thereof |
| CN115045108A (en) * | 2022-07-08 | 2022-09-13 | 中国核动力研究设计院 | Composite material, preparation method and application |
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