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Polyester/low-filling hybrid carbon nanotube composite material and preparation method thereof

A technology of carbon nanotubes and composite materials, applied in the field of material science, can solve problems such as compatibility differences, and achieve the effect of good dispersion and easy dispersion

Inactive Publication Date: 2014-07-09
GUANGXI LISHENG STONE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, short carbon nanotubes and longer carbon nanotubes are easier to disperse, but long carbon nanotubes have more prominent electrical and thermal conductivity; carbon nanotubes with different surface treatments should also have different compatibility in the same polymer system

Method used

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  • Polyester/low-filling hybrid carbon nanotube composite material and preparation method thereof
  • Polyester/low-filling hybrid carbon nanotube composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 78g dimethyl terephthalate, 50g ethylene glycol and 0.03g n-tetrabutyl titanate into a 250ml three-necked flask equipped with mechanical stirring, and control the reaction temperature to 200°C for transesterification;

[0026] (2) After the amount of methanol steamed by transesterification reaches 25.4g, add 0.03g zinc acetate, and 0.05g diameter is 10-20nm carboxylated single-walled carbon nanotubes (wherein, the mass ratio is: short carbon nanotubes (length about 2 micron) / long carbon nanotube (about 20 microns in length) = 1 / 1), the control temperature is 280°C, the polycondensation reaction is carried out under a pressure of less than 40Pa for 4h, and after the polycondensation is completed, it is vacuum-dried at 80°C for 24h to obtain the product. Ethylene terephthalate / carbon nanotube composites. The carbon nanotube content in the composite material is 0.05wt%. The obtained sample was hot-pressed at 265°C to form a film, and the force, electrical conducti...

Embodiment 2

[0028] (1) Add 78g dimethyl terephthalate, 50g ethylene glycol and 0.03g n-tetrabutyl titanate into a 250ml three-necked flask equipped with mechanical stirring, and control the reaction temperature to 200°C for transesterification;

[0029] (2) After the amount of methanol steamed by transesterification reaches 25.4g, add 0.03g zinc acetate, and 0.5g diameter is 10-20nm carboxylated single-walled carbon nanotube (wherein, mass ratio is: short carbon nanotube (length about 2 micron) / long carbon nanotube (about 20 microns in length) = 1 / 1), the control temperature is 280°C, the polycondensation reaction is carried out under a pressure of less than 40Pa for 4h, and after the polycondensation is completed, it is vacuum-dried at 80°C for 24h to obtain the product. Ethylene terephthalate / carbon nanotube composites. The carbon nanotube content in the composite material is 0.5wt%. The obtained sample was hot-pressed at 265°C to form a film, and the force, electrical conductivity and...

Embodiment 3

[0031] (1) Add 78g dimethyl terephthalate, 50g ethylene glycol and 0.03g n-tetrabutyl titanate into a 250ml three-necked flask equipped with mechanical stirring, and control the reaction temperature to 200°C for transesterification;

[0032] (2) After the amount of methanol evaporated by transesterification reaches 25.4g, add 0.03g zinc acetate, and 5g diameter is 10-20nm carboxylated single-walled carbon nanotubes (wherein, mass ratio is: short carbon nanotubes (about 2 microns in length) ) / long carbon nanotubes (about 20 microns in length)=1 / 1), the control temperature is 280°C, the polycondensation reaction is carried out under a pressure of less than 40Pa for 4h, and after the polycondensation is completed, the product is obtained by vacuum drying at 80°C for 24h. Ethylene phthalate / carbon nanotube composites. The carbon nanotube content in the composite material is 5wt%. The obtained sample was hot-pressed at 265°C to form a film, and the force, electrical conductivity a...

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Abstract

The invention relates to a polyester / low-filling hybrid carbon nanotube composite material and a preparation method thereof. The carbon nanotube composite material is prepared from the following raw materials, by weight, 0.05-5 parts of carbon nanotubes, 78 parts of dimetyl terephthalate, 50-100 parts of a diol, 0.0078-0.78 parts of an ester exchange catalyst and 0.0078-0.78 parts of a polymerization catalyst. According to the composite material prepared in the invention, advantages of long carbon nanotubes and short carbon nanotubes, which are greatly performed through the optimized combination of the long carbon nanotubes and the short carbon nanotubes, and the low system viscosity and vigorous mechanical stirring in the in situ polymerization process allow the carbon nanotubes to be uniformly dispersed in the system, so the low filling of the carbon nanotubes allows good mechanical performances, thermal performances and electric performances of the composite material to be reached. The method for preparing the high-electricity-conduction high-thermal-conduction low-filling composite material is an in situ polymerization method without any solvents, so the method is greatly convenient for the industrialized production.

Description

technical field [0001] The invention belongs to the technical field of material science and relates to a polyester / low-filled hybrid carbon nanotube composite material and a preparation method thereof. Background technique [0002] For a long time, polymer materials have been considered to be less useful in conducting electricity and heat, mainly because their volume resistivity is generally 10 10 ~10 20 Between Ω / cm, it is far from meeting the minimum electrical conductivity requirements; similarly, its thermal conductivity is also very different, about 1 / 500 to 1 / 600 of metal. This greatly limits the use of polymer materials from the root. However, many fields currently have high requirements for electrical and thermal conductivity. Although metals such as silver, copper, and aluminum have good electrical and thermal conductivity, and have been used in a wide range of fields, their specificity is large and expensive. Its application range, especially various instruments...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08K9/04C08K7/00C08K3/04C08L67/02
Inventor 陈珍明杨桂生
Owner GUANGXI LISHENG STONE CO LTD