A kind of polymer-based carbon nanotube dispersing aid and its synthesis method and application

A technology of carbon nanotubes and dispersing aids, which is applied in the innovative field of polymer-based carbon nanotubes dispersing aids and their synthesis methods and uses, can solve the problems of low dispersion, achieve increased dispersion, wide process window, Simple operation effect

Inactive Publication Date: 2011-12-07
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It solves the problem of low dispersion of CNTs in commonly used organic solvents and significantly increases the dispersion of CNTs in organic solvents, thus laying the foundation for the solution method to prepare polymer-based carbon nanotube composites with excellent properties

Method used

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  • A kind of polymer-based carbon nanotube dispersing aid and its synthesis method and application
  • A kind of polymer-based carbon nanotube dispersing aid and its synthesis method and application
  • A kind of polymer-based carbon nanotube dispersing aid and its synthesis method and application

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Embodiment 1

[0034] A polymer-based carbon nanotube dispersion aid. It is represented by the following general formula (A)

[0035]

[0036] R in the general formula 1 for CH 3 (CH 2 ) 3 -; R 2 for -CH 2 -; n=46; m=0.89; its chemical structure is a pyrene-functionalized amorphous polystyrene homopolymer, the pyrene unit is located at the end of the polymer molecular chain, and the content is 0.89 pyrene units per one polymer chain; its number average molecular weight is 5,200, and its molecular weight distribution index is 1.21.

Embodiment 2

[0038] A polymer-based carbon nanotube dispersion aid. It can be represented by general formula (A), and general formula (A) is the same as embodiment 1. R in the general formula 1 for (CH 3 ) 2 CHCH 2 -; R 2 for -CH 2 -; n=80; m=0.96; its chemical structure is a pyrene functionalized amorphous polystyrene homopolymer, the pyrene unit is located at the end of the polymer molecular chain, and the content is 0.96 pyrene unit per one polymer chain; its number average molecular weight is 8,800, and its molecular weight distribution index is 1.20.

Embodiment 3

[0040] A polymer-based carbon nanotube dispersion aid. It can be represented by general formula (A), and general formula (A) is the same as embodiment 1. R in the general formula 1 for C 6 h 5 -; R 2 for -CH 2 -; n=180; m=0.97; its chemical structure is a pyrene-functionalized amorphous polystyrene homopolymer, the pyrene unit is located at the end of the polymer molecular chain, and the content is 0.97 pyrene units per one polymer chain; its number average molecular weight is 19,100, and its molecular weight distribution index is 1.17.

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Abstract

A polymer-based carbon nanotube dispersing aid and its synthesis method and application. The polymer-based carbon nanotube dispersing aid is a pyrene-functionalized amorphous polystyrene homopolymer, and the structural formula is a polymer in which one end of the polystyrene main chain is capped by 0.9-1.05 pyrene units. The number average molecular weight is between 5,000 and 30,000, and the molecular weight distribution index is between 1.10 and 1.21. The anionic polymerization method was adopted to synthesize, and the reactive pyrene-containing compound was added in the late stage of styrene living polymerization, and methanol was used to terminate the reaction after the polymerization. The polymer-based carbon nanotube dispersing assistant of the present invention can significantly improve the dispersing ability of carbon nanotubes in common organic solvents, and can prepare a uniform dispersion liquid of high-concentration carbon nanotubes. The dispersion liquid can be used to prepare a styrene-based polymer (polystyrene or styrene-based copolymer) / carbon nanotube composite material in which carbon nanotubes are uniformly dispersed in a matrix resin.

Description

technical field [0001] The invention relates to the field of polymer and nanotechnology, and more specifically relates to a polymer-based carbon nanotube dispersing aid and the innovation of its synthesis method and application. Background technique [0002] Carbon nanotubes (CNTs) are considered as ideal fillers for the preparation of high-performance, multifunctional polymer nanocomposites due to their ultra-high aspect ratio, low density, excellent physical and mechanical properties, and high thermal and electrical conductivity. . Although theoretical and experimental studies have proved that CNTs have the above-mentioned outstanding properties, the efforts of materials scientists, chemists, and physicists are still needed to realize these properties in polymer-based composites. Since CNTs, especially single-walled carbon nanotubes (SWNTs) have a large specific surface area, they usually exist in the form of tube bundles. When CNTs are dispersed in the matrix resin in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/52C08F112/08C08F8/02C08L25/06C08L53/02C08L55/02C08K7/00C08K3/04C09K23/52
Inventor 闫业海崔健王新程俊梅于永良
Owner QINGDAO UNIV OF SCI & TECH
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