Preparation method of hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conductive composite film

A polybutadiene and carbon nanotube technology, which is applied in the field of preparation of conductive composite films, can solve the problems of long operation time, difficult formation of conductive films, easy occurrence of chapping, etc., and achieves the effect of high sensitivity

Inactive Publication Date: 2015-12-30
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of existing carbon nanotubes such as poor dispersion, low gas sensitivity response, long operating time, difficult formation of conductive film, and easy chapping phenomenon, and provide a simple and easy-to-operate, low-energy-consumption Preparation method of carboxyl-terminated polybutadiene-acrylonitrile copolymer / carbon nanotube conductive composite film with hydroxyl functionalization, short operation time, easy film formation and good carbon nanotube dispersion performance

Method used

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  • Preparation method of hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conductive composite film
  • Preparation method of hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conductive composite film
  • Preparation method of hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conductive composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1. Dissolve 14.6g of carboxyl-terminated polybutadiene-acrylonitrile copolymer with an average molecular weight of 2800 in 6mL of tetrahydrofuran solvent, add 35mL of triethanolamine and 1.8g of sodium bisulfate, and perform esterification reaction at 110°C for 4 hours, and the reaction is completed. The obtained product was washed with distilled water until it was neutral, and dried in vacuum at 110° C. for 7 days to obtain a modified hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer.

[0026] 2. Put 0.100 g of hydroxyl multi-walled carbon nanotubes (purchased from Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences) in a 50 mL three-neck flask, add 5 mL of toluene, and ultrasonically disperse them with an ultrasonic cleaner for 2 hours to obtain a uniform carbon nanotube dispersion. The used hydroxyl multi-walled carbon nanotubes have an outer diameter of 30-50 nm, a length of 10-20 μm, and a hydroxyl content of 1.06%.

...

Embodiment 2

[0034] In step 3 of Example 1, 0.300 g of hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer and 5 mL of toluene were added to a 50 mL three-necked flask, stirred evenly, and 8.0 μg of di-n-butyltin dilaurate, 31.4 μg of hexamethylene diisocyanate was heated up to 80°C and reacted at constant temperature for 2 hours to form a brown-yellow transparent solution. Other steps were the same as in Example 1 to obtain a hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer / carbon nanotube conductive composite film.

Embodiment 3

[0036] In step 3 of Example 1, 0.186 g of hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer and 5 mL of toluene were added to a 50 mL three-necked flask, stirred evenly, and 5.7 μg of di-n-butyltin dilaurate, 41.9 μg of hexamethylene diisocyanate was heated up to 80°C and reacted at constant temperature for 2 hours to form a brown-yellow transparent solution. Transfer the brown-yellow transparent solution in step 3 to the carbon nanotube dispersion obtained in step 2, react at 80°C for 2 hours, add 8 μL of 1,4-butanediol dropwise, and continue to react at 80°C for 2 hours to obtain a uniformly dispersed black suspension. Cloudy liquid. The other steps were the same as in Example 1 to obtain a hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer / carbon nanotube conductive composite film.

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Abstract

The invention discloses a preparation method of a hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer / carbon nanotube conducting composite film. The method comprises the following steps: carrying out in-situ coupling reaction on a hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer and uniform hydroxy multiwall carbon nanotubes subjected to ultrasonic dispersion to form a polyurethane compound by using hexamethylene diisocyanate, coating a film, and drying at room temperature to obtain the hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer / carbon nanotube conducting composite film. The method is simple to operate and easy for film formation, and has the advantages of low energy consumption, short operation time and favorable dispersibility of the carbon nanotubes; the obtained conducting composite film can implement detection on benzene and methylbenzene solvent vapor, has the advantages of short response time, high sensitivity and high selectivity, can not cause permanent damage to the conducting film, can implement the ppm-level detection on the benzene vapor, and can implement repeated use.

Description

technical field [0001] The invention belongs to the technical field of preparation of conductive composite films, and in particular relates to a method for preparing a hydroxyl-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer / carbon nanotube conductive composite film. Background technique [0002] With the continuous acceleration of urbanization and industrialization, indoor environmental pollution is becoming more and more serious. Indoor pollutants include volatile organic compounds, such as toluene, formaldehyde, benzene, methyl chloride, etc., which have various types and concentrations. Low, long duration and other characteristics. These volatile organic compounds mainly come from the release of artificial floors, paints, interior paints, wallpapers, floors, adhesives, etc., which are suspected carcinogens. Therefore, the detection of these volatile organic compounds is particularly important. [0003] At present, domestic reports on hydroxyl c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L75/04C08K7/00C08K3/04C08G18/65C08G18/62C08G18/32C08G18/10
Inventor 徐峰郭双罗延龄
Owner SHAANXI NORMAL UNIV
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