Preparation method of carbon nano tube-based electrically conductive and flame-retardant aqueous polyurethane coating and adhesive

A technology of water-based polyurethane and carbon nanotubes, which is applied in polyurea/polyurethane coatings, conductive coatings, polyurea/polyurethane adhesives, etc., and can solve the problems of poor heat resistance, water resistance, antistatic, flame retardant and other limited applications , The strength of water-based polyurethane coatings is not high, etc., to achieve the effects of improving thermal stability, improving catalytic efficiency, and high dispersibility

Inactive Publication Date: 2015-02-04
JINHUA VOCATIONAL TECH COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of water-based polyurethane coating products is not high, and the performance of heat resistance, water resistance, antistatic and flame retardancy is poor, which limits its further application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of carboxylated carbon nanotubes

[0026] Add 0.1 g of carbon nanotubes and 100 mL of concentrated nitric acid into a 250 mL flask at a reaction temperature of 50°C, condense and reflux for 1 h in an ultrasonic cleaner with an ultrasonic power of 200 W and an ultrasonic frequency of 40 KHz; then transfer to a beaker with 250 g Dilute with deionized water, filter with a microporous membrane with a diameter of 0.2 μm, wash with deionized water repeatedly until neutral; finally dry the filtered carbon nanotubes at 105°C for 12 hours, and grind them into powder for later use to obtain Carboxylated carbon nanotubes;

[0027] The carbon nanotubes are single-walled carbon nanotubes produced by chemical vapor deposition, with a diameter of 1nm, a tube length of 100 μm, a purity of 99.5wt%, amorphous carbon impurities2 / g;

[0028] (2) Preparation of amidated carbon nanotubes

[0029] Take 0.040g of carboxylated carbon nanotubes prepared in step (1) and add the...

Embodiment 2

[0036] (1) Preparation of carboxylated carbon nanotubes

[0037] Take 1g of carbon nanotubes and 200mL of mixed acid (the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1) into a 500 mL flask, the reaction temperature is 70 ° C, in an ultrasonic cleaner with an ultrasonic power of 200W and an ultrasonic frequency of 40KHz Condensate and reflux for 5 hours; then transfer to a beaker and dilute with 350g deionized water, filter with a microporous filter membrane with a diameter of 0.2 μm, and wash with deionized water repeatedly until neutral; finally put the carbon nanotubes after suction filtration at 105°C Bake for 12 hours, grind to powder for later use;

[0038] The carbon nanotubes are multi-walled carbon nanotubes produced by chemical vapor deposition, with a diameter of 100nm, a tube length of 5 μm, a purity of 99.5wt%, amorphous carbon impurities2 / g;

[0039] (2) Preparation of amidated carbon nanotubes

[0040] Take 0.200 g of the carb...

Embodiment 3

[0046] (1) Preparation of carboxylated carbon nanotubes

[0047] Add 0.5 g of carbon nanotubes and 250 mL of concentrated sulfuric acid into a 500 mL flask at a reaction temperature of 60°C, condense and reflux for 3 hours in an ultrasonic cleaner with an ultrasonic power of 200W and an ultrasonic frequency of 40KHz; then transfer to a beaker with 300g Dilute with deionized water, filter with a microporous membrane with a diameter of 0.2 μm, and wash repeatedly with deionized water until neutral; finally, dry the carbon nanotubes after suction at 105 ° C, grind them into powder for later use, To obtain carboxylated carbon nanotubes;

[0048] The carbon nanotubes are double-walled carbon nanotubes produced by chemical vapor deposition, with a diameter of 3nm, a tube length of 50 μm, a purity of 99.5wt%, amorphous carbon impurities2 / g;

[0049] (2) Preparation of amidated carbon nanotubes

[0050] Take 0.250 g of carboxylated carbon nanotubes prepared in step (1) and add them...

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Abstract

The invention relates to a preparation method of carbon nano tube-based electrically conductive and flame-retardant aqueous polyurethane coating and adhesive. Specifically, the preparation method comprises the following steps: carrying out acidifying treatment on a carbon nano tube, modifying a carboxyl group on the surface in a certain proportion and condensing with acrylamide to prepare an amidated carbon nano tube intermediate; and finally condensing the amidated carbon nano tube with isophorone diisocyanate by virtue of in-situ polymerization, so as to improve the dispersibility of the carbon nano tube in aqueous polyurethane emulsion and enhance physical and chemical actions between polyurethane molecules, thus finally preparing as novel carbon nano tube-based electrically conductive and flame-retardant aqueous polyurethane coating and adhesive emulsion. The finished product can be widely used as a coating for a wall, furniture and metal appliances and also can be used as an adhesive for plastic, glass, rubber, papermaking, leather and spinning.

Description

[0001] technical field [0002] The invention relates to a method for preparing a carbon nanotube-based waterborne polyurethane composite material, in particular to a method for preparing a carbon nanotube-based conductive and flame-resistant waterborne polyurethane coating and an adhesive. Background technique [0003] Carbon nanotubes were discovered by Iijima in 1991. They are mainly single-layer or multi-layer tubular nanomaterials composed of carbon hexagons (the bends are carbon pentagons and carbon heptagons). Carbon nanotubes have excellent mechanical properties, and their modulus and strength can reach between 200GPa~1000GPa and 200MPa~900MPa. Compared with general inorganic fillers, carbon nanotubes have an aspect ratio as high as 100-1000, have excellent flexibility, and have good compatibility with polymers. In addition, carbon nanotubes also have excellent electrical conductivity, excellent electrical properties, magnetic properties and optical properties. Mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D7/12C09D5/18C09D5/24C09J175/06C09J11/04C09J9/02C08G18/75C08G18/44C08G18/34C08G18/32C08G18/22
CPCC08G18/0823C08G18/3206C08G18/348C08G18/44C08G18/6677C08G18/6692C08G18/755C08K7/24C08K9/04C09D5/18C09D5/24C09D7/62C09D7/70C09D175/06C09J9/02C09J11/04C09J175/06
Inventor 王延青段宝荣
Owner JINHUA VOCATIONAL TECH COLLEGE
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