阅读说明：本技术 一种用于导电线路的填充式导电油墨及其制备方法 (A kind of filled type electrically conductive ink and preparation method thereof for conducting wire ) 是由 王旭红 李小东 李娜 高峰 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种用于导电线路的填充式导电油墨,该填充式导电油墨的配方包括以下组份：环氧树脂15％-20％、聚乙二醇3％-7％、甲苯二异氰酸酯1％-4％、固化剂2％-6％、溶剂1％-5％、分散剂2％-6％、导电炭黑5％-9％、导电石墨29％-35％、其余为银纳米线；本发明还公开了一种用于导电线路的填充式导电油墨的制备方法,该制备方法包括以下步骤：聚氨酯预制体制备,聚合反应,柔性导电填料制备,合成导电油墨；本发明制备出的填充式导电油墨得到较大提升,以端异氰酸酯聚氨酯为增韧剂,通过端异氰酸酯基与环氧树脂上的仲羟基反应,在环氧树脂上引入柔韧性的醚键对环氧树脂成功进行了改性,改善了环氧树脂的柔性,用改性后的环氧树脂制成的导电油墨与PET薄膜有良好的附着力。(The invention discloses a kind of filled type electrically conductive ink for conducting wire, the formula of the filled type electrically conductive ink includes following component: epoxy resin 15%-20%, polyethylene glycol 3%-7%, toluene di-isocyanate(TDI) 1%-4%, curing agent 2%-6%, solvent 1%-5%, dispersing agent 2%-6%, conductive black 5%-9%, electrically conductive graphite 29%-35%, remaining be silver nanowires；The invention also discloses a kind of preparation method of filled type electrically conductive ink for conducting wire, for the preparation method the following steps are included: prepared by polyurethane precast body, polymerization reaction, compliant conductive filler preparation synthesizes electrically conductive ink；The filled type electrically conductive ink that the present invention prepares is highly improved, using isocyanate terminated polyurethane as toughener, it is reacted by terminal isocyanate group with the secondary hydroxyl on epoxy resin, flexible ehter bond is introduced on epoxy resin, and modification is successfully made to epoxy resin, the flexibility for improving epoxy resin, the electrically conductive ink made of modified epoxy resin and PET film have good adhesive force.)

1. a kind of filled type electrically conductive ink for conducting wire, it is characterised in that；The formula of the filled type electrically conductive ink includes Following component: epoxy resin 15%-20%, polyethylene glycol 3%-7%, toluene di-isocyanate(TDI) 1%-4%, curing agent 2%- 6%, solvent 1%-5%, dispersing agent 2%-6%, conductive black 5%-9%, electrically conductive graphite 29%-35%, remaining be silver nanoparticle Line.

2. a kind of filled type electrically conductive ink for conducting wire according to claim 1, it is characterised in that: including epoxy Resin 15%, polyethylene glycol 7%, toluene di-isocyanate(TDI) 1%, curing agent 6%, solvent 1%, dispersing agent 6%, conductive black 5%, electrically conductive graphite 35%, remaining be silver nanowires.

3. a kind of filled type electrically conductive ink for conducting wire according to claim 1, it is characterised in that: including epoxy Resin 16%, polyethylene glycol 6%, toluene di-isocyanate(TDI) 2%, curing agent 5%, solvent 2%, dispersing agent 5%, conductive black 6%, electrically conductive graphite 34%, remaining be silver nanowires.

4. a kind of filled type electrically conductive ink for conducting wire according to claim 1, it is characterised in that: including epoxy Resin 17%, polyethylene glycol 5%, toluene di-isocyanate(TDI) 3%, curing agent 4%, solvent 3%, dispersing agent 4%, conductive black 7%, electrically conductive graphite 33%, remaining be silver nanowires.

5. a kind of filled type electrically conductive ink for conducting wire according to claim 1, it is characterised in that: including epoxy Resin 20%, polyethylene glycol 3%, toluene di-isocyanate(TDI) 4%, curing agent 2%, solvent 5%, dispersing agent 2%, conductive black 9%, electrically conductive graphite 29%, remaining be silver nanowires.

6. a kind of filled type electrically conductive ink for conducting wire according to claim 1, it is characterised in that: the solidification Agent is dicyanodiamine, and solvent is methylimidazole, and dispersing agent is dimethylformamide.

7. a kind of a kind of preparation side of filled type electrically conductive ink for conducting wire as described in claim 1-6 any one Method, it is characterised in that: the preparation method the following steps are included:

S1: polyethylene glycol is added in the preparation of polyurethane precast body in three-necked flask, and heating vacuumizes dehydration, inflated with nitrogen after cooling Protection keeps interior 75-85 DEG C of temperature, the toluene di-isocyanate(TDI) of stoichiometry is added as early as possible, stops reacting after stirring 0.5-1.2h, Isocyanate terminated base polyurethane prepolymer for use as is obtained, is cooled to room temperature for use, surveying NCO content with di-n-butylamine method is 5%；

S2: epoxy resin is added in polymerization reaction in three-necked flask, adds ethylene glycol ether acetate dissolution completely, keeps Base polyurethane prepolymer for use as obtained in the step of 65-75 DEG C of interior temperature, addition stoichiometry one, reacts 1.5-2.5h, obtains polyurethane Modified epoxy IPN；

S3: the preparation of compliant conductive filler using electrically conductive graphite as primary raw material, and is equipped with conductive black, is prepared using Hummers method Graphite oxide is obtained, three-dimensional netted graphene is made using microwave radiation pyrolysis expansion method in graphite oxide, silver nitrate is taken to be added Ultrasound is to being completely dissolved in ethylene glycol, adds three-dimensional netted graphene and is dispersed with stirring 1.2h and obtains dispersion liquid, by dispersion liquid plus Enter in dimethylformamide and stir, FeCl6HO alcoholic solution is then added and stirs and evenly mixs, sealing and standing 13h, obtained reaction solution Successively to be washed for several times with deionized water, dehydrated alcohol, after centrifuge separation, vacuum drying obtains graphene/silver nanowires compound, It takes graphene/silver nanowires compound and graphene nanometer sheet that 6~10h of ball milling in ball grinder is added to fill out to get to compliant conductive Material；

S4: synthesis electrically conductive ink, by a certain proportion of compliant conductive filler as made from step 3 and polyurethane modified epoxy tree Rouge IPN mixing, is added curing agent, solvent, dispersing agent, 20-40min is ground in grinder, modified epoxy base is obtained and leads Electric ink.

Technical field

The present invention relates to filled type electrically conductive ink preparation technical field, specially a kind of filled type for conducting wire is led Electric ink and preparation method thereof.

Background technique

Touch screen is also known as " touch screen ", " touch panel ", is a kind of induction type liquid of the input signals such as receivable contact Crystal device, when contacting the graphic button on screen, the haptic feedback system on screen can be according to the journey of preprogramming Formula drives various connection devices, is substituted for mechanical push button panel, and produces by liquid crystal display picture lively Visual and sound effects, touch screen technology as at present it is a kind of most simply, conveniently, naturally man-machine interaction mode by the whole world it is universal Pay attention to, and is widely used in various industries.Raising with development in science and technology and people to product requirement, flexible touch screen Gradually it is applied to the mobile electronic devices such as mobile phone and palm PC.Flexible touch screen is using can be any made of flexible material The touch-control display panel of bending deformation has outstanding advantages of light, thin, foldable and portable；

Touch screen uses flexible circuit board cooperating, and flexible circuit board passes through printing using electrically conductive ink or conductive ink Or the mode of printing forms conducting wire on flexible insulating substrate, but traditional electrically conductive ink and PET film adhesion Difference；And the conducting wire plate poor toughness of traditional electrically conductive ink attachment, bending resistance poor performance；For this purpose, the present invention proposes a kind of use In the filled type electrically conductive ink and preparation method thereof of conducting wire.

Summary of the invention

The filled type electrically conductive ink and preparation method thereof that the purpose of the present invention is to provide a kind of for conducting wire, with solution Certainly the problems mentioned above in the background art.

To achieve the above object, the invention provides the following technical scheme: a kind of filled type conductive oil for conducting wire Ink, which includes following component: epoxy resin 15%-20%, polyethylene glycol 3%-7%, toluene diisocynate Ester 1%-4%, curing agent 2%-6%, solvent 1%-5%, dispersing agent 2%-6%, conductive black 5%-9%, electrically conductive graphite 29%-35%, remaining be silver nanowires.

Preferably, including epoxy resin 15%, polyethylene glycol 7%, toluene di-isocyanate(TDI) 1%, curing agent 6%, solvent 1%, dispersing agent 6%, conductive black 5%, electrically conductive graphite 35%, remaining be silver nanowires.

Preferably, including epoxy resin 16%, polyethylene glycol 6%, toluene di-isocyanate(TDI) 2%, curing agent 5%, solvent 2%, dispersing agent 5%, conductive black 6%, electrically conductive graphite 34%, remaining be silver nanowires.

Preferably, including epoxy resin 17%, polyethylene glycol 5%, toluene di-isocyanate(TDI) 3%, curing agent 4%, solvent 3%, dispersing agent 4%, conductive black 7%, electrically conductive graphite 33%, remaining be silver nanowires.

Preferably, including epoxy resin 20%, polyethylene glycol 3%, toluene di-isocyanate(TDI) 4%, curing agent 2%, solvent 5%, dispersing agent 2%, conductive black 9%, electrically conductive graphite 29%, remaining be silver nanowires.

Preferably, the curing agent is dicyanodiamine, and solvent is methylimidazole, and dispersing agent is dimethylformamide.

A kind of a kind of preparation method of the filled type electrically conductive ink for conducting wire as described above, the preparation method packet Include following steps:

S1: polyethylene glycol is added in the preparation of polyurethane precast body in three-necked flask, and heating vacuumizes dehydration, fills after cooling Nitrogen protection keeps interior 75-85 DEG C of temperature, the toluene di-isocyanate(TDI) of stoichiometry is added as early as possible, stops after stirring 0.5-1.2h Reaction is cooled to room temperature for use, surveying NCO content with di-n-butylamine method is 5% to get isocyanate terminated base polyurethane prepolymer for use as is arrived；

S2: epoxy resin is added in polymerization reaction in three-necked flask, adds ethylene glycol ether acetate dissolution completely, Base polyurethane prepolymer for use as obtained in the step of 65-75 DEG C of temperature in keeping, addition stoichiometry one, reacts 1.5-2.5h, is gathered Urethane modified epoxy IPN；

S3: the preparation of compliant conductive filler using electrically conductive graphite as primary raw material, and is equipped with conductive black, using Hummers method Graphite oxide is prepared, three-dimensional netted graphene is made using microwave radiation pyrolysis expansion method in graphite oxide, takes silver nitrate Ultrasound is added in ethylene glycol to being completely dissolved, adds three-dimensional netted graphene and is dispersed with stirring 1.2h and obtain dispersion liquid, will disperse Liquid is added in dimethylformamide and stirs, and FeCl6HO alcoholic solution is then added and stirs and evenly mixs, sealing and standing 13h, what is obtained is anti- Liquid is answered successively to be washed for several times with deionized water, dehydrated alcohol, after centrifuge separation, it is multiple that vacuum drying obtains graphene/silver nanowires Object is closed, takes graphene/silver nanowires compound and graphene nanometer sheet that 6~10h of ball milling in ball grinder is added and is led to get to flexibility Electric filler；

S4: synthesis electrically conductive ink, by a certain proportion of compliant conductive filler as made from step 3 and polyurethane-modified ring Oxygen resin IPN mixing, is added curing agent, solvent, dispersing agent, 20-40min is ground in grinder, obtains modified epoxy Base electrically conductive ink.

Compared with prior art, the beneficial effects of the present invention are: formula of the present invention is national regulations raw material, And the filled type electrically conductive ink that the present invention prepares is highly improved, and using isocyanate terminated polyurethane as toughener, passes through end Isocyanate group is reacted with the secondary hydroxyl on epoxy resin, and flexible ehter bond is introduced on epoxy resin to epoxy resin success It is modified, improves the flexibility of epoxy resin, the electrically conductive ink made of modified epoxy resin has good with PET film Good adhesive force, the conducting wire buckle resistance of printing have reached 10000 times, and electric property has reached similar with bending resistance The index of product meets the requirement of flexible print circuit.

Specific embodiment

The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects It encloses.