Carbon nanotube modified polyurea explosion-proof material and preparation method thereof

A technology of carbon nanotube modification and explosion-proof materials, which is applied in the direction of polyurea/polyurethane coatings, coatings, etc., to achieve good results

Inactive Publication Date: 2019-10-08
QINGDAO AIR NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the use of carbon nanotubes to modify polyurea materials for ...

Method used

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  • Carbon nanotube modified polyurea explosion-proof material and preparation method thereof
  • Carbon nanotube modified polyurea explosion-proof material and preparation method thereof
  • Carbon nanotube modified polyurea explosion-proof material and preparation method thereof

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preparation example Construction

[0032] see figure 1 , a method for preparing a carbon nanotube modified polyurea explosion-proof material provided by the present invention, comprising the following steps:

[0033] Step S110: preparing functionalized carbon nanotubes;

[0034] Step S120: preparing a polyurea elastomer material; and

[0035] Step S130: mixing the functionalized carbon nanotubes with the polyurea elastomer material to obtain the carbon nanotube-modified polyurea explosion-proof material.

[0036] In the carbon nanotube modified polyurea explosion-proof material provided by the present invention, the carbon nanotubes are pre-functionalized, and then the functionalized carbon nanotubes are inserted into the polyurea elastomer resin through a combination of conventional physical dispersion and chemical reaction. , because the whole process does not contain non-reactive pigments and fillers, the physical reinforcement of the filler to the material is abandoned, and at the same time, the defect of...

Embodiment 1

[0063] Preparation of Aminated Carbon Nanotubes

[0064] (1) The multi-walled carbon nanotube raw material is mixed with the mixture of concentrated sulfuric acid and concentrated nitric acid in a weight ratio of 0.1 to 100, treated with 80kHz ultrasonic waves for 48 hours, stirred at 80°C, suction filtered, and washed repeatedly with water until The filtrate is neutral, and after vacuum drying, hydroxyl-functionalized carbon nanotubes are obtained;

[0065] (2) Pre-treat the single-necked flask by evacuating and burning off the water vapor, then fill with nitrogen, add 0.1 parts by weight of the hydroxyl-functionalized carbon nanotubes obtained in step (1) to the processed single-necked flask, and then vacuumize and fill the flask with nitrogen again. 100 parts by weight of dimethylacetamide (DMAC) was added to the mixture and ultrasonic was used for 30 minutes. Then add 1 part by weight of azobisbutylnitrile (AIBN) and 1 part by weight of acrylic acid into the flask, put it...

Embodiment 2

[0070] Preparation of Polyurea Elastomer Material

[0071] The composition and mass parts of A component and B component are as follows:

[0072]

[0073] The volume ratio of component A to component B is 1:1

[0074] The α value (-NCO / -NH) of component A and component B is 1.05~1.10

[0075] The spray paint temperature of component A and component B should be kept at 65℃~70℃

[0076] For the preparation of component A, put PTMG1000 into a reaction kettle with nitrogen protection, heat it to 120°C under stirring, dehydrate it under vacuum -0.1MPa for 2.5 hours, release the vacuum, drop the temperature below 60°C and add polyisocyanate, at 85 React at ℃ for 2 hours. After the reaction is over, measure the NCO value, add functionalized carbon nanotubes, and disperse ultrasonically at 50-60°C for 24 hours. Tube modified isocyanate terminated semi-prepolymer A component.

[0077] For the preparation of component B, weigh each component according to the order of the formul...

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Abstract

The invention provides a carbon nanotube modified polyurea explosion-proof material. The preparation method includes: preparing functionalized carbon nanotubes, preparing a polyurea elastomer material, and mixing the functionalized carbon nanotubes with the polyurea elastomer material to obtain the carbon nanotube modified polyurea explosion-proof material. Carbon nanotubes are functionalized in advance, the functionalized carbon nanotubes are connected into polyurea elastomer resin by means of combining conventional physical dispersion with chemical reaction, and the whole process does not contain non-reactive pigment and filler, so that physical reinforcing of filler to the material is abandoned, and the defect that the material is poor in low-temperature flexibility due to the fact thatthe material is reinforced by increasing hard segment content in a resin system is avoided. The carbon nanotube modified polyurea explosion-proof material can be used in military facilities and explosion-proof energy-absorbing protection equipment, has good actual effect and practical value, can resist shock waves and fragments caused by explosion and meets basic requirements of military equipment.

Description

technical field [0001] The invention relates to the technical field of explosion-proof material compositions, in particular to a carbon nanotube modified polyurea explosion-proof material and a preparation method thereof. Background technique [0002] Spraying polyurea materials are widely used in the fields of submarine pipeline, buried pipeline anticorrosion, storage tank anticorrosion, concrete protection, waterproof, military skin, chassis protection, etc. because of its solvent-free environmental protection, high mechanical strength, and quick construction. Applying it to the field of military anti-ballistic and explosion-proof protective materials requires that the coating not only have super high physical strength, but also exhibit good tear resistance under high-speed impact, but it is difficult for conventional polyurea products to achieve the above-mentioned Require. The current conventional solution is to add special fillers to the polyurea resin system or use a ...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D7/62C08G18/76C08G18/75C08G18/66C08G18/48C08G18/32
CPCC08G18/3234C08G18/4854C08G18/6685C08G18/755C08G18/7671C08G2150/50C08K2201/011C08L2205/025C09D7/62C09D175/02C08L75/02C08K13/06C08K9/08C08K9/02C08K3/041C08K7/24
Inventor 王宝柱岳长山温喜梅王伟李灿刚王玲玲
Owner QINGDAO AIR NEW MATERIALS
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