Preparation method of hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conducting composite film

A technology of polybutadiene and carbon nanotubes, which is applied in the field of preparation of conductive composite films, can solve the problems of long operation time, easy chapping, poor dispersion, etc., and achieve the effect of high sensitivity

Inactive Publication Date: 2014-02-05
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 hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conducting composite film
  • Preparation method of hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conducting composite film
  • Preparation method of hydroxy-functionalized carboxyl-terminated polybutadiene-acrylonitrile copolymer/carbon nanotube conducting composite film

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Effect test

Embodiment 1

[0025] 1. Dissolve 14.6g of carboxy-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, esterify at 110°C for 4 hours, and the reaction is over. The obtained product was washed with distilled water to neutrality, and vacuum dried at 110° C. for 7 days to obtain a modified hydroxyl-terminated polybutadiene-acrylonitrile copolymer.

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

[0027] 3. Add 0.150g hydroxyl-functionalized carboxyl-terminated polybutadiene-...

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 uniformly, and 8.0 μg di-n-butyl tin dilaurate, 31.4μg of hexamethylene diisocyanate was heated to 80°C and reacted at constant temperature for 2 hours to form a brown-yellow transparent solution. The other steps are 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, add 0.186 g of hydroxyl-functionalized carboxy-terminated polybutadiene-acrylonitrile copolymer and 5 mL of toluene into a 50 mL three-necked flask, stir evenly, and add 5.7 μg di-n-butyltin dilaurate, 41.9μg of hexamethylene diisocyanate was heated to 80°C and reacted at a constant temperature for 2 hours to form a brown-yellow transparent solution. Transfer the brown-yellow transparent solution from step 3 to the carbon nanotube dispersion obtained in step 2, react at 80°C for 2 hours, add 8 μL 1,4-butanediol dropwise, and continue to react at 80°C for 2 hours to obtain a uniformly dispersed black suspension Turbid liquid. The other steps are 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 specifically 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 has become more and more serious. Indoor pollutants include volatile organic compounds, such as toluene, formaldehyde, benzene, methyl chloride, etc., and they have many types and concentrations. Low and long duration. These volatile organic compounds mainly come from the release of artificial floors, paints, interior coatings, wallpaper, floors, adhesives, etc., which are suspected carcinogens. Therefore, the detection of these volatile organic compounds is particularly important. [0003] At present, there are many mature technologies in domestic reports about ...

Claims

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Application Information

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Patent Type & Authority Applications(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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