CN116285501A - Preparation method of ink electric conductor - Google Patents

Abstract

The invention discloses the technical field of preparation of ink electrical conductors, in particular to a preparation method of an ink electrical conductor, which comprises the steps of adding epoxy resin into an isocyanate-terminated polyurethane prepolymer, adding glycol ethyl ether acetate into the mixture to dissolve the mixture, and reacting for 2-3 hours to obtain polyurethane modified epoxy resin; the invention has the beneficial effects that: the dried ink electric conductor prolongs the service life, has simple and reliable preparation process, can make various cold light patterns according to the needs, has bright color, distinct body, good contrast, energy conservation, environmental protection and excellent outdoor interference resistance, and is suitable for various environments.

Description

Preparation method of ink electric conductor

Technical Field

The invention relates to the technical field of ink electric conductor preparation, in particular to a preparation method of an ink electric conductor.

Background

The ink electric conductor is an indispensable consumable material for preparing microelectronic devices by using an ink jet printing technology, and the quality of the ink electric conductor directly influences the conductive performance of electronic components. The unique non-contact digital controllable printing method of the ink jet printing technology can pattern on any shape of base material and save consumable materials, and the outstanding advantages are deeply emphasized by people, and the ink electric conductor is applied to a flexible or hard circuit board and can also play roles of wires, antennas or resistors. The ink electrical conductor is also widely applied in the electronic field, such as radio frequency identification tag equipment, photoelectricity, medical patches, medical imaging and the like, and can also be applied to electronic equipment such as membrane switches, transparent contact switches, IC cards, RFID, electronic luminescent plates, pressure sensors and the like. In addition, the ink electric conductor can be widely applied to cold light identification indicating equipment of highways, tunnels, bridges, carriers and power equipment. The existing cold light mark indicating equipment is usually formed by using industrial fluorescent powder or photosensitive silver paste in a platemaking mode, has weak outdoor interference resistance to moisture, ultraviolet rays and the like, and needs to be additionally provided with a protective frame body. Meanwhile, the types of the current available ink electric conductors in the field of cold light mark indicating equipment are fewer, the difficulty of the preparation process is high, and the service life of the current ink electric conductors is short.

Therefore, it is necessary to invent a method for preparing an ink electrical conductor.

Disclosure of Invention

In order to achieve the above object, the present invention provides the following technical solutions: the preparation method comprises the following steps of:

s1: adding epoxy resin into the isocyanate-terminated polyurethane prepolymer, and then adding glycol diethyl ether acetate to dissolve the mixed solution, and reacting for 2-3 hours to obtain polyurethane modified epoxy resin;

the preparation method of the epoxy resin comprises the following steps:

p1, weighing bisphenol A and NaOH mixed solution with the mass concentration of 8-10%, mixing and stirring until the mixed solution is dissolved; the method comprises the steps of carrying out a first treatment on the surface of the

P2, adding epoxy chloropropane into the dissolution liquid, reacting for 2-3.5h at 50-100 ℃, washing to be neutral, and dehydrating to obtain an epoxy resin product;

p3, washing the reactant for 7 times to neutrality, and then dehydrating under normal pressure and reduced pressure to obtain epoxy resin;

s2: adding graphite particles into the S1 solution, fully and uniformly stirring and fully mixing, and standing for 0.5h;

s3: mixing propylene glycol methyl ether propionate, tributyl phosphate and propylene glycol methyl ether at normal temperature to obtain solution A;

s4: mixing polydimethylsiloxane and methacryloxy silane to obtain a solution B, and adding a required pigment into the solution B;

s5: mixing the solution A and the solution B, and then adding the mixture into the solution obtained in the step S2;

s6: carrying out ultrasonic vibration treatment on the liquid obtained in the step S5 for 1h;

s7: combining the solution obtained in the step S6 with a patterning technology to form ink-jet printing;

s8: drying the finished product in the step S7 to form an ink electric conductor;

s9: after the drying treatment, the solvent volatilizes, the volume is reduced, and a continuous and stable network is finally formed;

the temperature is maintained at 70-80 degrees in step S1.

The drying process in step S7 employs drying.

The preparation steps of the isocyanate-terminated polyurethane prepolymer in the step S1 are as follows:

heating polyethylene glycol, vacuumizing and dehydrating until the water content is less than or equal to 0.2%, cooling to 20-25 ℃, then charging nitrogen for protection, adjusting the internal temperature to 80-85 ℃, adding 2, 4-toluene diisocyanate, stirring for reacting until the-NCO content is less than or equal to 4%, stopping the reaction, and cooling to 20-25 ℃.

The invention has the beneficial effects that: the dried ink electric conductor prolongs the service life, has simple and reliable preparation process, can make various cold light patterns according to the needs, has bright color, clear fonts, good contrast, energy conservation, environmental protection and excellent outdoor interference resistance, and is suitable for various environments.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and explanation only and is not intended to limit the present invention.

Embodiment one:

the invention provides a preparation method of an ink electric conductor, which comprises the following specific operation steps of:

s1: adding epoxy resin into the isocyanate-terminated polyurethane prepolymer, and then adding glycol diethyl ether acetate to dissolve the mixed solution, and reacting for 2-3 hours to obtain polyurethane modified epoxy resin;

s2: adding graphite particles into the S1 solution, fully and uniformly stirring and fully mixing, and standing for 0.5h;

s3: mixing propylene glycol methyl ether propionate, tributyl phosphate and propylene glycol methyl ether at normal temperature to obtain solution A;

s4: mixing polydimethylsiloxane and methacryloxy silane to obtain a solution B, and adding a required pigment into the solution B;

s5: mixing the solution A and the solution B, and then adding the mixture into the solution obtained in the step S2;

s6: carrying out ultrasonic vibration treatment on the liquid obtained in the step S5 for 1h;

s7: combining the solution obtained in the step S6 with a patterning technology to form ink-jet printing;

s8: drying the finished product in the step S7 to form an ink electric conductor;

s9: after the drying treatment, the solvent volatilizes, the volume is reduced, and a continuous and stable network is finally formed;

the temperature is maintained at 70-80 degrees in step S1.

The drying process in step S7 employs drying.

The preparation steps of the isocyanate-terminated polyurethane prepolymer in the step S1 are as follows:

heating polyethylene glycol, vacuumizing and dehydrating until the water content is less than or equal to 0.2%, cooling to 20-25 ℃, then charging nitrogen for protection, adjusting the internal temperature to 80-85 ℃, adding 2, 4-toluene diisocyanate, stirring for reacting until the-NCO content is less than or equal to 4%, stopping the reaction, and cooling to 20-25 ℃.

Embodiment two:

s3: mixing propylene glycol methyl ether propionate, tributyl phosphate and propylene glycol methyl ether into a solution A at normal temperature;

s4: mixing polydimethylsiloxane and methacryloxy silane to obtain a solution B, and adding a required pigment into the solution B;

s5: mixing the solution A and the solution B, and then adding the mixture into the solution obtained in the step S2;

the substances in S3 and S4 can be mixed with tributyl phosphate and propylene glycol methyl acryloyloxy silane at normal temperature to prepare a preparation liquid, and the preparation liquid is added with pigment, then propylene glycol methyl ether propionate polydimethylsiloxane is added, and finally the preparation liquid is mixed with the solution in S2.

Embodiment III:

45g of polyurethane modified epoxy resin is dissolved in acetone, 6.5g of graphite with the particle size of 7-8 nm is added, then 15g of propylene glycol methyl ether propionate, 9g of tributyl phosphate, 7.5g of propylene glycol methyl ether, 6g of polydimethylsiloxane, 3.75g of methacryloxy silane and 9g of C.I. direct black 166 are added, and after uniform mixing, ultrasonic oscillation treatment is carried out for 45-75min, thus obtaining the nano graphite conductive ink.

Embodiment four:

the preparation method of the epoxy resin comprises the following steps:

p1, weighing bisphenol A and NaOH mixed solution with the mass concentration of 8-10%, mixing and stirring until the mixed solution is dissolved; the method comprises the steps of carrying out a first treatment on the surface of the

P2, adding epoxy chloropropane into the dissolution liquid, reacting for 2-3.5h at 50-100 ℃, washing to be neutral, and dehydrating to obtain an epoxy resin product;

p3, washing the reactant for 7 times to neutrality, and then dehydrating under normal pressure and reduced pressure to obtain epoxy resin;

the molar ratio of NaOH in the mixed solution of bisphenol A, epichlorohydrin and 8-10% NaOH is 0.3-0.5:0.4-0.6:0.5-0.7, the mixed solution of 8-10% NaOH is prepared from 32% NaOH solution, alkali-containing saturated saline and tap water, the mass concentration of NaOH in the alkali-containing saturated saline is 2-10%, and the alkali-containing saturated saline is a byproduct generated by preparing an aliphatic epoxy resin reactive diluent.

The above description is only of the preferred embodiments of the present invention, and any person skilled in the art may modify the present invention or make modifications to the present invention equivalent thereto using the technical solutions described above. Therefore, any simple modification or equivalent made according to the technical solution of the present invention falls within the scope of the protection claimed by the present invention.

Claims (4)

1. The preparation method of the ink electric conductor comprises isocyanate-terminated polyurethane prepolymer, and is characterized by comprising the following specific operation steps:

s1: adding epoxy resin into the isocyanate-terminated polyurethane prepolymer, and then adding glycol diethyl ether acetate to dissolve the mixed solution, and reacting for 2-3h to obtain polyurethane modified epoxy resin;

the preparation method of the epoxy resin comprises the following steps:

p1, weighing bisphenol A and NaOH mixed solution with the mass concentration of 8-10%, mixing and stirring until the mixed solution is dissolved; the method comprises the steps of carrying out a first treatment on the surface of the

P2, adding epoxy chloropropane into the dissolution liquid, reacting for 2-3.5h at 50-100 ℃, washing to be neutral, and dehydrating to obtain an epoxy resin product;

p3, washing the reactant for 7 times to neutrality, and then dehydrating under normal pressure and reduced pressure to obtain epoxy resin;

s2: adding graphite particles into the S1 solution, fully and uniformly stirring and fully mixing, and standing for 0.5h;

s3: mixing propylene glycol methyl ether propionate, tributyl phosphate and propylene glycol methyl ether at normal temperature to obtain solution A;

s4: mixing polydimethylsiloxane and methacryloxy silane to obtain a solution B, and adding a required pigment into the solution B;

s5: mixing the solution A and the solution B, and then adding the mixture into the solution obtained in the step S2;

s6: carrying out ultrasonic vibration treatment on the liquid obtained in the step S5 for 1h;

s7: combining the solution obtained in the step S6 with a patterning technology to form ink-jet printing;

s8: drying the finished product in the step S7 to form an electric conductor;

s9: after the drying process, the solvent volatilizes and the volume decreases to eventually form a continuous stable network.

2. The method for producing an electrical conductor for ink according to claim 1, wherein the temperature is maintained at 70 to 80 degrees in step S1.

3. The method for producing an electrical conductor of ink according to claim 1, wherein the drying treatment in step S7 is drying.

4. The method for preparing an ink electrical conductor according to claim 1, wherein the preparation of the isocyanate terminated polyurethane prepolymer in step S1 comprises the following steps:

heating polyethylene glycol, vacuumizing and dehydrating until the water content is less than or equal to 0.2%, cooling to 20-25 ℃, then charging nitrogen for protection, adjusting the internal temperature to 80-85 ℃, adding 2, 4-toluene diisocyanate, stirring for reacting until the-NCO content is less than or equal to 4%, stopping the reaction, and cooling to 20-25 ℃.