Preparation method of sulfydryl carbon nano-tube micro-sphere conductive adhesives for liquid-crystal display circuits

Abstract

The invention discloses a preparation method of sulfydryl carbon nano-tube micro-sphere conductive adhesives for liquid-crystal display circuits. The method includes the steps: preparing monomers, initiating agents, dispersing agents and solvents into macro-molecular micro-spheres; preparing sulfydryl modified carbon nano-tubes; wrapping and growing the sulfydryl modified carbon nano-tubes on thesurfaces of the treated macro-molecular micro-spheres by a low-temperature plasma enhanced chemical vapor deposition method to prepare sulfydryl modified carbon nano-tube micro-spheres; dispersing thesulfydryl modified carbon nano-tube micro-spheres into acrylic resin adhesives comprising acrylic resin, curing agents, surface active agents and coupling agents; performing defoaming treatment to obtain the sulfydryl modified carbon nano-tube micro-sphere conductive adhesives. According to the method, sulfydryl is grafted on the carbon nano-tubes, the sulfydryl and a lot of metal generate strongresultant force, so that the cohesiveness of prepared conductive adhesives is greatly improved, and the method overcomes the shortcomings that conductive fillers in tradition conductive adhesives arehigh in content, high in prices, complicated in preparation process, high in environmental pollution and the like.

Description

technical field

[0001] The invention relates to the field of conductive adhesives, in particular to a method for preparing a mercapto carbon nanotube microsphere conductive adhesive for liquid crystal display circuits. Background technique

[0002] With the rapid development of the world's information and communication industries, display devices are becoming more and more important as the key components of human-machine dialogue. Thin film transistor-liquid crystal displays (TFT-LCDs) make The technology of fine processing of microelectronics is transplanted to the processing of thin film transistor (TFT) array on large area glass, and then the array substrate and another substrate with color filter film are used with the mature liquid crystal display (LCD) Technology to form a liquid crystal cell, and then go through post-processing such as polarizer coating and other processes, and finally form a liquid crystal display device. The FPD (flat panel display) industry with T...

Examples

Embodiment 1

[0034] (1) The ratio of parts by mass is 5 : 0.01: 0.05 : 100, taking styrene monomer, azobisisobutyronitrile initiator, chloroform and solvent ethanol, and reacting at 90°C for 5 hours to prepare a polymer micro Balls, the particle size of the polymer microspheres is 6 μm;

[0035] (2) Using single-walled carbon nanotubes with a diameter of 40 nm and a purity greater than 97% as raw materials, the original carbon nanotubes were added to H 2 SO 4 :HNO 3 =3:1 in the mixed acid, the mass ratio of the carbon nanotubes to the mixed acid was 1:180, ultrasonically dispersed for 30 min, placed on a constant temperature magnetic stirrer and stirred at 80 °C for 30 min; then the treated carbon The nanotubes are added to a large amount of deionized water to cool, centrifuged, and repeatedly sucked to neutrality, and vacuum dried to obtain carbon dioxide nanotubes. Weigh the raw materials according to the mass ratio of oxidized carbon nanotubes, 3-mercaptopropyltrimethoxysilane and di...

Embodiment 2

[0040] (1) The ratio of parts by mass is 30 : 0.2 : 0.15 : 100, taking styrene monomer, azobisisobutyronitrile initiator, mercaptoethanol and solvent ethanol, and reacting at 65°C for 18 hours to prepare a polymer Microspheres, the polymer microspheres have a particle size of 4 μm;

[0041] (2) Using multi-walled carbon nanotubes with a diameter of 10 nm and a purity greater than 97% as raw materials, the original carbon nanotubes are added to the mixed acid of H2SO4:HNO3=3:1, and the mass ratio of the carbon nanotubes to the mixed acid is It was 1:190, ultrasonically dispersed for 30 min, placed on a constant temperature magnetic stirrer, and stirred at 80 °C for 30 min; then the treated carbon nanotubes were added to a large amount of deionized water to cool, centrifuged, and repeatedly sucked to medium properties, vacuum drying, prepared carbon dioxide nanotubes. Weigh the raw materials according to the mass ratio of oxidized multi-walled carbon nanotubes, 3-mercaptopropyl...

Embodiment 3

[0046] (1) The ratio of parts by mass is 15 : 0.5 : 3 : 100, taking styrene monomer, azobisisobutyronitrile initiator, mercaptoacetic acid and solvent ethanol, and reacting at 70°C for 12 hours to prepare a polymer Microspheres, the polymer microspheres have a particle size of 5 μm;

[0047] (2) Using single-wall carbon nanotubes and multi-wall carbon nanotubes with a diameter of 30 nm and a purity greater than 97% as raw materials, the original carbon nanotubes are added to the mixed acid of H2SO4:HNO3=3:1, and the carbon nanotubes The mass ratio of the tube to the mixed acid was 1:190, ultrasonically dispersed for 30 min, and placed on a constant temperature magnetic stirrer at 80 °C for 30 min under reflux; then the treated carbon nanotubes were added to a large amount of deionized water to cool, centrifuged, And repeated suction filtration to neutrality, and vacuum drying to obtain oxidized carbon nanotubes. Weigh the raw materials according to the mass ratio of oxidized ...

technical field

[0001] The invention relates to the field of conductive adhesives, in particular to a method for preparing a mercapto carbon nanotube microsphere conductive adhesive for liquid crystal display circuits. Background technique

[0002] With the rapid development of the world's information and communication industries, display devices are becoming more and more important as the key components of human-machine dialogue. Thin film transistor-liquid crystal displays (TFT-LCDs) make The technology of fine processing of microelectronics is transplanted to the processing of thin film transistor (TFT) array on large area glass, and then the array substrate and another substrate with color filter film are used with the mature liquid crystal display (LCD) Technology to form a liquid crystal cell, and then go through post-processing such as polarizer coating and other processes, and finally form a liquid crystal display device. The FPD (flat panel display) industry with T...

Examples

Embodiment 1

[0034] (1) The ratio of parts by mass is 5 : 0.01: 0.05 : 100, taking styrene monomer, azobisisobutyronitrile initiator, chloroform and solvent ethanol, and reacting at 90°C for 5 hours to prepare a polymer micro Balls, the particle size of the polymer microspheres is 6 μm;

[0035] (2) Using single-walled carbon nanotubes with a diameter of 40 nm and a purity greater than 97% as raw materials, the original carbon nanotubes were added to H 2 SO 4 :HNO 3 =3:1 in the mixed acid, the mass ratio of the carbon nanotubes to the mixed acid was 1:180, ultrasonically dispersed for 30 min, placed on a constant temperature magnetic stirrer and stirred at 80 °C for 30 min; then the treated carbon The nanotubes are added to a large amount of deionized water to cool, centrifuged, and repeatedly sucked to neutrality, and vacuum dried to obtain carbon dioxide nanotubes. Weigh the raw materials according to the mass ratio of oxidized carbon nanotubes, 3-mercaptopropyltrimethoxysilane and di...

Embodiment 2

[0040] (1) The ratio of parts by mass is 30 : 0.2 : 0.15 : 100, taking styrene monomer, azobisisobutyronitrile initiator, mercaptoethanol and solvent ethanol, and reacting at 65°C for 18 hours to prepare a polymer Microspheres, the polymer microspheres have a particle size of 4 μm;

[0041] (2) Using multi-walled carbon nanotubes with a diameter of 10 nm and a purity greater than 97% as raw materials, the original carbon nanotubes are added to the mixed acid of H2SO4:HNO3=3:1, and the mass ratio of the carbon nanotubes to the mixed acid is It was 1:190, ultrasonically dispersed for 30 min, placed on a constant temperature magnetic stirrer, and stirred at 80 °C for 30 min; then the treated carbon nanotubes were added to a large amount of deionized water to cool, centrifuged, and repeatedly sucked to medium properties, vacuum drying, prepared carbon dioxide nanotubes. Weigh the raw materials according to the mass ratio of oxidized multi-walled carbon nanotubes, 3-mercaptopropyl...

Embodiment 3

[0046] (1) The ratio of parts by mass is 15 : 0.5 : 3 : 100, taking styrene monomer, azobisisobutyronitrile initiator, mercaptoacetic acid and solvent ethanol, and reacting at 70°C for 12 hours to prepare a polymer Microspheres, the polymer microspheres have a particle size of 5 μm;

[0047] (2) Using single-wall carbon nanotubes and multi-wall carbon nanotubes with a diameter of 30 nm and a purity greater than 97% as raw materials, the original carbon nanotubes are added to the mixed acid of H2SO4:HNO3=3:1, and the carbon nanotubes The mass ratio of the tube to the mixed acid was 1:190, ultrasonically dispersed for 30 min, and placed on a constant temperature magnetic stirrer at 80 °C for 30 min under reflux; then the treated carbon nanotubes were added to a large amount of deionized water to cool, centrifuged, And repeated suction filtration to neutrality, and vacuum drying to obtain oxidized carbon nanotubes. Weigh the raw materials according to the mass ratio of oxidized ...

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