Carbon nano-tube / unsaturated polyester composite material and preparation thereof

A polyester composite material and carbon nanotube technology, which is applied in the field of nanomaterials to achieve the effects of reduced volume resistivity, convenient preparation and simple process

Inactive Publication Date: 2009-04-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, functionalized carbon nanotubes prepared by reacting amino or hydroxyl acrylate compounds with carbon nanotubes have not been reported yet.

Method used

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  • Carbon nano-tube / unsaturated polyester composite material and preparation thereof
  • Carbon nano-tube / unsaturated polyester composite material and preparation thereof
  • Carbon nano-tube / unsaturated polyester composite material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Mix 500 mg of multi-walled carbon nanotubes with an average diameter of 8 to 15 nm and a length of 50 μm with 150 mL of H 2 SO 4 with HNO 3 mixed solution (98%H 2 SO 4 : 68% HNO 3 = 3:1) mixed, and reflux reaction for 4 hours at 35-40° C. and ultrasonic vibration. Then filter with a metafluoride membrane with a pore size of 0.45 μm, and wash with water until the pH is neutral. The product was placed in a vacuum oven and dried under vacuum at 40°C for 24h. Then the above-mentioned one-step acidified and washed product was placed in H 2 SO 4 with H 2 o 2 mixed solution (98%H 2 SO 4 : 30%H 2 o 2 =4:1) at 70°C for 2h. Then filter with a metafluoride membrane with a pore size of 0.45 μm, and wash with water until the pH is neutral. The product was placed in a vacuum oven and dried under vacuum at 40°C for 24h.

[0034] Step 2: Take 400 mg of the above-mentioned acidified carbon nanotubes and place them in a reaction flask, add 20 mL of SOCl 2 And 1mL...

Embodiment 2

[0038] The first step and the second step are prepared according to the method described in Example 1 to prepare acyl chloride carbon nanotubes.

[0039] Step 3: Mix 0.2 g of carbonyl chloride carbon nanotubes and 30 g of hydroxyhexyl methacrylate evenly, and heat and reflux in an oil bath at 96° C. for 36 hours. After the reaction was completed, the excess hydroxyhexyl methacrylate was ultrasonically washed away with absolute ethanol, filtered with a microporous membrane (0.45 μm in diameter), washed several times, and dried in vacuum to obtain a polymerizable double bonded carbon on the surface. nanotube.

[0040] Step 4: Take 30 g of unsaturated polyester, take 0.3 g of carbon nanotubes modified with hydroxyhexyl methacrylate according to 1% of the total amount, add it to the unsaturated polyester, stir vigorously for 8 hours, disperse with ultrasonic waves for 4 hours, and mix evenly. Add 0.3 g of cobalt isooctanoate and 0.45 g of methyl ethyl ketone peroxide, and stir ev...

Embodiment 3

[0042] The first step and the second step are prepared according to the method described in Example 1 to prepare acyl chloride carbon nanotubes.

[0043] Step 3: Mix 0.2 g of carbonyl chloride carbon nanotubes and 30 g of the reaction product of acrylic acid and ethylenediamine (N-ethylaminovinylamide) evenly, and heat to reflux in an oil bath at 96° C. for 36 h. After the reaction is completed, ultrasonically wash with absolute ethanol until the pH is neutral, filter with a microporous membrane (0.45 μm in diameter), repeat the washing several times, and dry in vacuum to obtain carbon nanotubes with polymerizable double bonds on the surface.

[0044] Step 4: Take 30 g of unsaturated polyester, take 0.3 g of the above-mentioned modified carbon nanotubes according to 1% of the total amount, add them to the unsaturated polyester, stir vigorously for 8 hours, disperse by ultrasonic wave for 4 hours, and mix evenly. Add 0.3 g of cobalt isooctanoate and 0.45 g of methyl ethyl keton...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a carbon nano tube / unsaturated polyester composite material and a preparation method thereof. The preparation method comprises the following steps: carboxylic acid and chloroformylation are carried out to the carbon nano tube, the carbon nano tube is modified by amino or hydroxyl acrylic ester compound, and the carbon nano tube which can carry polymerizable double bond. The modified carbon nano tube is dispersed in unsaturated polyester substrate, and cobalt iso-octoate and methyl ethyl ketone peroxide are adopted as an accelerating agent and a curing agent so as to prepare the carbon nano tube / unsaturated polyester composite material. The obtained composite material has higher heat stability and chemical stability. Compared with unsaturated polyester condensate which has same compositions and does not add the carbon nano tube, the volume resistivity of the cured composite material is reduced to 3 to 9 order of magnitude, and the surface resistivity is reduced to 3 to 8 order of magnitude. The invention has simple technique and more practicability. The composite material can be applied to the shell or coating of the equipment in the fields of manufacturing motors of electric appliances, chemical machines and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, specifically relates to the preparation technology of carbon nanotube composite materials, and refers to a preparation method of carbon nanotube / unsaturated polyester composite materials used as surface structure materials or coatings. Background technique [0002] Since Iijima discovered carbon nanotubes in 1991, carbon nanotubes have been a research hotspot in recent years because of their unique structure, good electrical and mechanical properties. Carbon nanotubes have nanoscale diameters and micron-scale lengths, and the aspect ratio can reach 100-1000. They are extremely strong and have ideal elastic modulus. They are an excellent fiber material, and their performance is better than any current fiber. Therefore, it can be used as a superfiber for the reinforcement of advanced composite materials; because carbon nanotubes combine the semi-metallic properties of graphite with the quantu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08K9/04C08K5/17C08K3/04
Inventor 王国建王瑶刘琳孙栋
Owner TONGJI UNIV
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