CN108822621A - Application in low temperature curing type composite conducting ink and preparation method thereof and touch screen - Google Patents
Application in low temperature curing type composite conducting ink and preparation method thereof and touch screen Download PDFInfo
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- CN108822621A CN108822621A CN201810328858.9A CN201810328858A CN108822621A CN 108822621 A CN108822621 A CN 108822621A CN 201810328858 A CN201810328858 A CN 201810328858A CN 108822621 A CN108822621 A CN 108822621A
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- graphene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
Abstract
The present invention relates to the applications in touch screen technology field more particularly to low temperature curing type composite conducting ink and preparation method thereof and touch screen, and low temperature curing type composite conducting ink includes the raw material of following parts by weight：45~65 parts of graphene compounded mix, 6~12 parts of organic binder, 2~5 parts of surfactant, 0.3~1.0 part of defoaming agent, the graphene compounded mix are that modified with ultrahigh molecular weight polyethylene is made using graphene.Graphene and conductive ultra-high molecular weight polyethylene are effectively combined by the present invention, are not only improved the dispersion of Graphene powder in production process, are improved the uniformity of electrically conductive ink, reduce the resistance of electrically conductive ink, and are conducive to improve the fastness of conducting wire and substrate bonding.
Description
Technical field
The present invention relates to touch screen technology field more particularly to low temperature curing type composite conducting ink and preparation method thereof and
Application in touch screen.
Background technique
With the fast development of electronic technology, touch screen using more and more extensive.Touch screen is that one kind can be by aobvious
The man-machine interface that display screen curtain operates electronic equipment allows user to carry out direct touch control at the interface.Existing touch
Screen has resistive touch screen, capacitive touch screen, infrared-type touch screen and ultrasonic surface formula touch screen.Wherein, capacitor
Formula touch screen has been widely applied in each field, institute because it has many advantages, such as that the service life is long, accuracy is high, volume production feasibility is strong
Calling capacitive touch screen is exactly a kind of touch screen for reaching touch control operation purpose using the peculiar electrical characteristics of human body.
The layout method of the patterning conducting wire of touch screen mostly uses yellow light micro-photographing process technology, screen printing technology and radium-shine
Printing technology is assisted, these technologies, which require electrically conductive ink, can form conducting wire.Electrically conductive ink be usually by conductive filler,
The high concentration multiphase dispersion of Binder Phase, solvent and auxiliary agent composition, wherein conductive filler is the main component of electrocondution slurry, is mentioned
For the electric conductivity of electrocondution slurry；Binder Phase guarantees there is good binding force between conducting wire and matrix；Organic solvent and auxiliary agent
It is to be allowed to be suitable for silk-screen printing for adjusting slurry.Conductive filler is divided into metal system and carbon system again, and what metal system was often used has
Gold, silver, copper etc., carbon system commonly use graphene and carbon nanotube.
Graphene is a kind of two-dimension periodic honeycomb dot matrix structural material being made of carbon atom, with high conductivity, greatly
The features such as specific surface area, good mechanical strength and thermal stability.Meanwhile the flexibility of graphene can be well adapted for flexibility
Circuit.But graphene is easy to happen reunion during producing electrically conductive ink, so that mixing is uneven, influences leading for ink
Electrical property.
Summary of the invention
In view of this, the object of the present invention is to provide low temperature curing type composite conducting ink and preparation method thereof and touching
Graphene and conductive ultra-high molecular weight polyethylene are effectively combined, not only improve graphene in production process by the application in screen
The dispersion of powder improves the uniformity of electrically conductive ink, reduces the resistance of electrically conductive ink, and it is viscous with substrate to be conducive to raising conducting wire
The fastness of knot.
The present invention solves above-mentioned technical problem by following technological means：
Low temperature curing type composite conducting ink, the raw material including following parts by weight：45~65 parts of graphene compounded mix,
6~12 parts of organic binder, 2~5 parts of surfactant, 0.3~1.0 part of defoaming agent, the graphene compounded mix are to utilize
Modified with ultrahigh molecular weight polyethylene is made in graphene.
Further, the graphene compounded mix is in powdered, and particle diameter distribution is at 0.6~23 μm.
Further, the organic binder is phenolic resin, epoxy resin, organic siliconresin, one in ethyl cellulose
Kind is a variety of, and the surfactant is polyethylene glycol, and the defoaming agent is dimethicone.
In addition, the invention also discloses the preparation methods of above-mentioned low temperature curing type composite conducting ink, which is characterized in that packet
Include following steps：
The preparation of graphene compounded mix：Ultra-high molecular weight polyethylene is taken to grind sieving, obtaining partial size is 20~30 μ
Ultra-high molecular weight polyethylene powder is added in graphene dispersing solution, seals at room temperature by the ultra-high molecular weight polyethylene powder of m
1~1.5h of ultrasound, then by purging, slowly removal solvent for 24 hours in 48~55 DEG C of vacuum drying obtains stone under stirring
Black alkene compounded mix；
The preparation of composite conducting ink：Take isopropanol be added deionized water in be made concentration be 25wt% isopropanol it is molten
Liquid is added graphene compounded mix, organic binder, surfactant, defoaming agent into aqueous isopropanol and stirs and evenly mixs, obtains
Composite conducting ink.
Further, the graphene dispersing solution prepare it is as follows：Natural graphite, over-expense are sequentially added in column vial
Change polyethylene and chloroform, under air-proof condition, the continual ultrasonic 48h under 25 DEG C of temperature, power 300W, 30~35kHz of frequency is obtained
Suspension is centrifugated under 4000r/min 1h, collects centrifuge tube supernatant liquor, be filtered by vacuum by pvdf membrane by suspension,
Ultrasound 10h is added in chloroform to get graphene dispersing solution is arrived in obtained filter residue.
Further, the mass ratio 8 of the natural graphite, hyperbranched polyethylene and chloroform:4:1.
Further, the mean pore size of the pvdf membrane is 100nm.
In addition, the invention also discloses composite conducting ink the answering in touch screen that above-mentioned preparation method is prepared
With the composite conducting ink is formed by curing pattern conductive line by screen printing or gunite on touch screen base material
Road.
It is first natural by ultrasound stripping using hyperbranched polyethylene in chloroform in composite conducting ink preparation of the invention
Graphite, the low defect form the few-layer graphene alkene dispersion liquid of hyperbranched polyethylene is contained on efficiently obtained surface, then poly- with super high molecular weight
Vinyl solution mixing, volatilizees through solvent, obtains the super high molecular weight composite powder with the graphene coated of isolation network structure,
The electric conductivity of electrically conductive ink can be enhanced.
Electrically conductive ink of the invention is compound with conducting polymer using graphene, reduces the gap between conductive particle,
Improve the conductive capability of electrically conductive ink；By graphene with conducting polymer is compound not only improves Graphene powder in production process
Dispersion improves the uniformity of particle dispersion in electrically conductive ink, reduces the resistance of electrically conductive ink, and it is advantageous to be conducive to conducting polymer
In the fastness for improving conducting wire and substrate bonding.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in detail：
Low temperature curing type composite conducting ink of the invention, the raw material including following parts by weight：Graphene compounded mix
45~65 parts, 6~12 parts of organic binder, 2~5 parts of surfactant, 0.3~1.0 part of defoaming agent, wherein graphene is compound
Filler is that modified with ultrahigh molecular weight polyethylene is made using graphene, and graphene compounded mix is in powdered, and particle diameter distribution
At 0.6~23 μm, organic binder selects one of phenolic resin, epoxy resin, organic siliconresin, ethyl cellulose or more
Kind, surfactant selects polyethylene glycol, and defoaming agent selects dimethicone.
Embodiment one
Preparing for the low temperature curing type composite conducting ink of the present embodiment is as follows：
The preparation of graphene compounded mix：It is 8 that mass ratio is sequentially added in column vial:4:1 natural graphite surpasses
Branched polyethylene and chloroform, under air-proof condition, the continual ultrasonic 48h under 25 DEG C of temperature, power 300W, frequency 30kHz is hanged
Suspension is centrifugated under 4000r/min 1h, collects centrifuge tube supernatant liquor, be by mean pore size by supernatant liquid
The pvdf membrane of 100nm is filtered by vacuum, and ultrasound 10h is added in chloroform to get graphene dispersing solution is arrived in obtained filter residue；Take superelevation point
Sub- weight northylen grinds sieving, the ultra-high molecular weight polyethylene powder that partial size is 20~30 μm is obtained, by super high molecular weight
Polyethylene powders are added in graphene dispersing solution, seal ultrasound 1h at room temperature, then slow by purging under stirring
Solvent is removed, for 24 hours in 48 DEG C of vacuum drying, obtains graphene compounded mix；
The preparation of composite conducting ink：Take isopropanol be added deionized water in be made concentration be 25wt% isopropanol it is molten
45 parts of graphene compounded mix, 6 parts of organic siliconresin, 2 parts of polyethylene glycol, dimethicone are added into aqueous isopropanol for liquid
0.3 part stirs and evenly mixs, and obtains composite conducting ink.
Embodiment two
Preparing for the low temperature curing type composite conducting ink of the present embodiment is as follows：
The preparation of graphene compounded mix：It is 8 that mass ratio is sequentially added in column vial:4:1 natural graphite surpasses
Branched polyethylene and chloroform, under air-proof condition, the continual ultrasonic 48h under 25 DEG C of temperature, power 300W, frequency 35kHz is hanged
Suspension is centrifugated under 4000r/min 1h, collects centrifuge tube supernatant liquor, be by mean pore size by supernatant liquid
The pvdf membrane of 100nm is filtered by vacuum, and ultrasound 10h is added in chloroform to get graphene dispersing solution is arrived in obtained filter residue；Take superelevation point
Sub- weight northylen grinds sieving, the ultra-high molecular weight polyethylene powder that partial size is 20~30 μm is obtained, by super high molecular weight
Polyethylene powders are added in graphene dispersing solution, seal ultrasound 1.5h at room temperature, then slow by purging under stirring
Slow removal solvent for 24 hours in 55 DEG C of vacuum drying obtains graphene compounded mix；
The preparation of composite conducting ink：Take isopropanol be added deionized water in be made concentration be 25wt% isopropanol it is molten
65 parts of graphene compounded mix, mass ratio 1 are added into aqueous isopropanol for liquid:2:It is 1 phenolic resin, epoxy resin, organic
1.0 parts of 5 parts of 12 parts of mixture, polyethylene glycol, the dimethicone of silicone resin stirs and evenly mixs, and obtains composite conducting ink.
Embodiment three
Preparing for the low temperature curing type composite conducting ink of the present embodiment is as follows：
The preparation of graphene compounded mix：It is 8 that mass ratio is sequentially added in column vial:4:1 natural graphite surpasses
Branched polyethylene and chloroform, under air-proof condition, the continual ultrasonic 48h under 25 DEG C of temperature, power 300W, 30~35kHz of frequency is obtained
To suspension, suspension is centrifugated 1h under 4000r/min, centrifuge tube supernatant liquor is collected, passes through mean pore size
It is filtered by vacuum for the pvdf membrane of 100nm, ultrasound 10h is added in chloroform to get graphene dispersing solution is arrived in obtained filter residue；Take superelevation
Molecular weight polyethylene grinds sieving, the ultra-high molecular weight polyethylene powder that partial size is 20~30 μm is obtained, by supra polymer
Weight northylen powder is added in graphene dispersing solution, seals ultrasound 1.2h at room temperature, then passes through purging under stirring
Slowly removal solvent for 24 hours in 50 DEG C of vacuum drying obtains graphene compounded mix；
The preparation of composite conducting ink：Take isopropanol be added deionized water in be made concentration be 25wt% isopropanol it is molten
50 parts of graphene compounded mix, 10 parts of ethyl cellulose, 3 parts of polyethylene glycol, dimethicone are added into aqueous isopropanol for liquid
0.5 part stirs and evenly mixs, and obtains composite conducting ink.
Example IV
Preparing for the low temperature curing type composite conducting ink of the present embodiment is as follows：
The preparation of graphene compounded mix is the same as embodiment three.
The preparation of composite conducting ink：Take isopropanol be added deionized water in be made concentration be 25wt% isopropanol it is molten
60 parts of graphene compounded mix, 8 parts of ethyl cellulose, 4 parts of polyethylene glycol, dimethicone are added into aqueous isopropanol for liquid
0.8 part stirs and evenly mixs, and obtains composite conducting ink.
The composite conducting ink that above-described embodiment is prepared can be used for the molding of touch screen conducting wire, and can pass through halftone
Print process or gunite are formed by curing pattern conductive route on touch screen base material.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferred embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that, it can modify to technical solution of the present invention
Or equivalent replacement should all cover without departing from the objective and range of technical solution of the present invention in claim of the invention
In range.Technology not described in detail in the present invention, shape, construction portion are well-known technique.
Claims (8)
1. low temperature curing type composite conducting ink, which is characterized in that the raw material including following parts by weight：Graphene compounded mix
45~65 parts, 6~12 parts of organic binder, 2~5 parts of surfactant, 0.3~1.0 part of defoaming agent, the graphene is compound to be filled out
Material is that modified with ultrahigh molecular weight polyethylene is made using graphene.
2. low temperature curing type composite conducting ink according to claim 1, which is characterized in that the graphene compounded mix
In powdered, and particle diameter distribution is at 0.6~23 μm.
3. low temperature curing type composite conducting ink according to claim 2, which is characterized in that the organic binder is phenol
One of urea formaldehyde, epoxy resin, organic siliconresin, ethyl cellulose are a variety of, and the surfactant is polyethylene glycol,
The defoaming agent is dimethicone.
4. the preparation method of low temperature curing type composite conducting ink according to claim 3, which is characterized in that including following
Step：
The preparation of graphene compounded mix：Ultra-high molecular weight polyethylene is taken to grind sieving, obtaining partial size is 20~30 μm
Ultra-high molecular weight polyethylene powder is added in graphene dispersing solution ultra-high molecular weight polyethylene powder, and sealing is super at room temperature
1~1.5h of sound, then by purging, slowly removal solvent for 24 hours in 48~55 DEG C of vacuum drying obtains graphite under stirring
Alkene compounded mix；
The preparation of composite conducting ink：Take isopropanol that the aqueous isopropanol for being made that concentration is 25wt% is added in deionized water, to
Graphene compounded mix, organic binder, surfactant, defoaming agent are added in aqueous isopropanol to stir and evenly mix, obtains compound
Electrically conductive ink.
5. the preparation method of low temperature curing type composite conducting ink according to claim 4, which is characterized in that the graphite
Preparing for alkene dispersion liquid is as follows：Natural graphite, hyperbranched polyethylene and chloroform, air-proof condition are sequentially added in column vial
Under, the continual ultrasonic 48h under 25 DEG C of temperature, power 300W, 30~35kHz of frequency obtains suspension, by suspension in 4000r/
It is centrifugated 1h under min, collects centrifuge tube supernatant liquor, is filtered by vacuum by pvdf membrane, obtained filter residue, which is added in chloroform, to be surpassed
Sound 10h to get arrive graphene dispersing solution.
6. the preparation method of low temperature curing type composite conducting ink according to claim 5, which is characterized in that described natural
The mass ratio 8 of graphite, hyperbranched polyethylene and chloroform:4:1.
7. the preparation method of low temperature curing type composite conducting ink according to claim 6, which is characterized in that the PVDF
The mean pore size of film is 100nm.
8. the application in low temperature curing type composite conducting ink touch screen according to claim 3, which is characterized in that described
Composite conducting ink is formed by curing pattern conductive route by screen printing or gunite on touch screen base material.
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| CN201810328858.9A CN108822621A (en) | 2018-04-13 | 2018-04-13 | Application in low temperature curing type composite conducting ink and preparation method thereof and touch screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110804234A (en) * | 2019-09-29 | 2020-02-18 | 芜湖凯龙电子科技有限公司 | Novel method for preparing PPTC (polymeric positive temperature coefficient) overcurrent protection element by using graphene |
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| CN103087335A (en) * | 2012-11-09 | 2013-05-08 | 浙江工业大学 | Method for preparing graphene organic dispersion solution from hyperbranched polyethylene |
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Application publication date: 20181116 |