Method for preparing carbon nanometer tube composites by sol and gel method

A sol-gel method and carbon nanotube technology, which is applied in the treatment of dyed macromolecular organic compounds, fibrous fillers, etc., can solve the problems of not completely solving the problem of carbon nanotube agglomeration, the scope of application is too narrow, and the implementation method is complicated. The sol-gel process is simple and easy to implement, the implementation method is simple, and the structure and performance can be adjusted.

Inactive Publication Date: 2005-07-27
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, these methods may not completely solve the problem of agglomeration of carbon nanotubes, or the scope of application is too narrow, or the implementation method is complicated, and cannot meet the needs of reality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Preparation of one of the carbon nanotube composites.

[0027] The carbon nanotube composite prepared in this embodiment is a carbon nanotube-polyurethane composite.

[0028] Steps:

[0029] In the first step, add 2 g of dry carbon nanotubes and 50 mL of mixed acid of 98% sulfuric acid and 60% nitric acid in a volume ratio of 3:1 to the flask, ultrasonically treat for 24 hours, filter with suction, wash, and vacuum-dry at 100°C to obtain acidified Carbon nanotubes 1.5g;

[0030] In the second step, add 1.5 g of acidified carbon nanotubes and 15 g of thionyl chloride obtained in the first step into the flask, ultrasonically treat for 30 minutes, heat to 60 ° C, stir and react under reflux for 24 hours, distill off excess thionyl chloride, and filter with suction. Wash to remove unreacted thionyl chloride, and dry under vacuum at 60°C to obtain 1.2 g of acylated carbon nanotubes;

[0031] In the third step, add 1.2 g of acylated carbon nanotubes obtained in ...

Embodiment 2

[0034] Example 2: Preparation of the second carbon nanotube composite.

[0035] The carbon nanotube composite prepared in this embodiment is a carbon nanotube-polyethylene glycol composite material.

[0036] Steps:

[0037] The first step is with embodiment 1; No second step;

[0038] In the third step, add 1.2 g of acidified carbon nanotubes obtained in the first step and 10 g of oxiranyl trimethoxysilane into the flask, seal it with a ground plug, repeatedly pump and fill the flask with nitrogen three times, ultrasonically treat for 40 minutes, and heat to 70°C , reacted under stirring for 96 hours, distilled off most of the excess silsesquioxane under reduced pressure, filtered, washed, and dried in vacuum at 40°C to obtain 1.0 g of carbon nanotubes grafted with silsesquioxane;

[0039] In the fourth step, the carbon nanotubes grafted with the silsesquioxane obtained in the third step and the single-end silsesquioxane polyethylene glycol with a molecular weight of 1000 ar...

Embodiment 3

[0041] Embodiment 3: The third preparation of the carbon nanotube composite.

[0042] The carbon nanotube composite prepared in this example is a carbon nanotube organic-inorganic hybrid material.

[0043] Steps:

[0044] The first, two and three steps are the same as embodiment 1;

[0045] In the fourth step, the silsesquioxane-grafted carbon nanotubes obtained in the third step are mixed with tetrahydrofuran solution of ethyl orthosilicate to make a sol with a concentration of 1%;

[0046] In the fifth step, the sol obtained in the fourth step is spin-coated at 25° C. and 4000 rpm to form a film to obtain a carbon nanotube organic-inorganic hybrid material.

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Abstract

Production of carbon nanometer tube composite by sol-gel method is carried out by surface modifying the carbon nanometer tube to obtain acidified carbon nanometer tube by strong acid oxide, reacting acidified carbon nanometer tube with acylating agent to prepare active carbon nanometer tube containing acyl halide perssad, sesquioxosilane with azyl, chlorine, and epoxy etc. active perssad as end group reacting with acidified or acyl halide perssad contained carbon nanometer tube, and obtaining sesquioxosilane stem grafted carbon nanometer tube. Its advantages include good solubility in organic solvent, good dispersiveness to plastic and coating, good compatibility for high performance membrane material, high strength material and wave absorbing material.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube composite by a sol-gel method, and belongs to the technical field of composite material preparation. Background technique [0002] Because carbon nanotubes have a series of excellent properties such as high strength and high electrical conductivity, they are very suitable as modifiers for various materials, especially polymer materials, but carbon nanotubes are insoluble and have poor compatibility with most materials. Researchers have been exploring ways to improve the solubility and compatibility of carbon nanotubes with materials. [0003] At present, there are three methods commonly used at home and abroad: online polymerization in the presence of carbon nanotubes; grafting organic matter or polymers on the surface of carbon nanotubes, and then blending with the polymer matrix; grafting on the surface of carbon nanotubes Polymerizable monomers are then copolym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C09C1/44C09C3/10
Inventor 徐敏陈群张弢袭锴
Owner EAST CHINA NORMAL UNIV
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