A kind of non-isocyanate polyurethane carbon nanotube modified epoxy resin composite material and preparation method thereof

A carbon nanotube modified, non-isocyanate technology, which is applied in the field of non-isocyanate polyurethane carbon nanotube modified epoxy resin composite materials and its preparation, can solve the problem of inability to effectively improve the flexibility of epoxy resin composite materials and the addition of carbon nanotubes. Solve problems such as limited amount, difficult to disperse paint, etc., achieve good storage stability, improve processability, and not easy to settle

Active Publication Date: 2018-03-30
SHANGHAI XIONGRUN RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN104341719A with a publication date of 2015.02.11 discloses "a carbon nanotube modified epoxy resin composite material". The surface-modified carbon nanotubes can be uniformly dispersed in the epoxy resin matrix, and the nanometer Compared with untreated carbon nanotubes, the composite material has better acid and alkali resistance, but it is inconvenient to use a large amount of dispersant and solvent
[0006] CN1844209A with a publication date of 2006.10.11 discloses a grafted carbon nanotube with active amino groups on the surface of the carbon nanotube, which provides an epoxy resin nanocomposite preparation method that is easy to disperse and has a good interfacial adhesion and enhanced curing function, but This material cannot effectively improve the flexibility of epoxy resin composites
[0007] CN103666199A with a publication date of 2014.03.26 discloses "carbon nanotube modified conductive anti-corrosion coating for grounding grid and its preparation method", which provides an epoxy resin coating with both conductive and anti-corrosion functions, but due to carbon nanotubes Without proper modification, it is not easy to disperse in the paint, and it needs to add a large amount of anti-rust paint to achieve a certain anti-corrosion function, which is quite limited in use
[0008] CN101775194A with a publication date of 2010.07.14 discloses "a carbon nanotube / epoxy resin composite material and its preparation method", adding plasma-activated grafted modified carbon nanotubes to the epoxy resin, so that the carbon nanotubes Good dispersion in epoxy resin, but the addition of carbon nanotubes is limited, the maximum addition is only 0.8%

Method used

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  • A kind of non-isocyanate polyurethane carbon nanotube modified epoxy resin composite material and preparation method thereof
  • A kind of non-isocyanate polyurethane carbon nanotube modified epoxy resin composite material and preparation method thereof
  • A kind of non-isocyanate polyurethane carbon nanotube modified epoxy resin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Take epoxy resin (1,4-Butanediol diglycidyl ether, SIGMA-ALDRICH, 100phr) and tetrabutylammonium bromide (tetrabutylammonium bromide, TBAB, SIGMA-ALDRICH, 0.5phr) and place in a high-pressure reaction tank, seal the reaction tank, At this time, the exhaust valve of the reaction tank was opened, and the carbon dioxide was passed into the reaction tank through the inlet valve, and the air content of the reactant was reduced for 10 minutes. Then close the exhaust valve, pass carbon dioxide into the reaction tank and make the carbon dioxide pressure in the reaction tank reach 8atm, heat the reaction tank to 140°C, then increase the carbon dioxide pressure to 10atm, continue the reaction for 5 hours, and obtain the cyclocarbonate product BDCE , by 1HNMR analysis, epoxy functional group 99%.

Embodiment 2

[0048] Get cyclocarbonate BDCE (290g) and dibasic amine D-230 (460g) was placed in the reaction tank, and the temperature was raised to 50°C for 4 hours, and the viscosity of the mixture increased with the reaction time, and the non-isocyanate polyurethane prepolymer NIPU-NH was obtained. 2 .

[0049] Preparation of non-isocyanate polyurethane modified carbon nanotubes:

Embodiment 3

[0051] Multi-walled carbon nanotubes (CNT Co.LTd., C Tube -100) into concentrated sulfuric acid (98%) and nitric acid (68%) mixture (v / v=3 / 1) mixed solution (carbon nanotubes: mixed acid solution = 1g: 100mL), oscillated by 40kHz ultrasonic wave for 30 minutes After that, the temperature was raised to 60°C for 4 hours, and the obtained product was washed with a large amount of deionized water, and filtered with a PVDF filter membrane (25mm 0.45um) until the pH value was approximately equal to 7, and the product was dried in a vacuum oven at 50°C , to obtain carboxylated carbon nanotubes (MWNT-COOH). After acid value analysis, the product carboxylic acid concentration was 0.186mmol / g.

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Abstract

The invention provides a nonisocyanate polyurethane carbon nano-tube modified epoxy resin composite material. The composite material is prepared by mixing and curing a carbon nano-tube epoxy resin curing agent and epoxy resin which are in a weight ratio of 1:5-5:1, wherein the carbon nano-tube epoxy resin curing agent is prepared from a carbon nano-tube and nonisocyanate polyurethane grafted on the carbon nano-tube which are in a weight ratio of 1:100-1:5. The invention further provides a method for preparing the nonisocyanate polyurethane carbon nano-tube modified epoxy resin composite material. The nonisocyanate polyurethane carbon nano-tube modified epoxy resin composite material has excellent storage stability, deposit prevented carbon nano-tube, relatively high toughness and corrosion resistance.

Description

Technical field: [0001] The invention relates to an epoxy resin composite material, in particular to a non-isocyanate polyurethane carbon nanotube modified epoxy resin composite material and a preparation method thereof. Background technique: [0002] Carbon nanotubes are a new technology developed rapidly in the late 1980s. With their unique structure and physical and chemical properties, carbon nanotubes have attracted the attention of all parties, aroused high attention, and have been widely used in various fields. Carbon nanotubes have high strength and excellent resistance to acid and alkali. Therefore, many studies have shown that adding carbon nanotubes to metal and polymer materials can effectively improve the physical and chemical properties of materials. Using nano Anti-corrosion coatings made with advanced technology are obviously superior to traditional anti-rust coatings in terms of anti-corrosion, adhesion, and flexibility. [0003] With the development of mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/02C08K9/04C08K9/08C08K7/24
CPCC08K7/24C08K9/02C08K9/04C08K9/08C08K2201/011C08L63/00
Inventor 何俊凌何愈
Owner SHANGHAI XIONGRUN RESIN
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