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Method and device for preparing vertical orderly carbon nano tube/polyaniline composite membrane

A carbon nanotube, vertically ordered technology, applied in the field of carbon nanotube/polyaniline composite film, can solve the problems of difficult to obtain thin film CNTs/polymer composite film, poor order of CNTs in the composite film, etc., and achieve cost Inexpensive, easy to operate, high order effect

Inactive Publication Date: 2015-01-28
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electric field method is the polarization phenomenon of CNTs under the action of the electric field force, resulting in a dipole moment, so that the CNTs can be arranged in an orderly manner along the direction of the electric field force, but it is difficult to obtain a thin film CNTs / polymer composite film by the electric field method
Mechanical force field-induced orientation, such as suction filtration, can use a vacuum filtration device to directly filter the mixed dispersion of CNTs and PANi nanofibers under shear force to form a thin film. The preparation method is simple, but the resulting composite film CNTs have poor order

Method used

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  • Method and device for preparing vertical orderly carbon nano tube/polyaniline composite membrane
  • Method and device for preparing vertical orderly carbon nano tube/polyaniline composite membrane
  • Method and device for preparing vertical orderly carbon nano tube/polyaniline composite membrane

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Embodiment 1

[0025] figure 1 It is a structural schematic diagram of the suction filter-electric field device of the present invention.

[0026] Such as figure 1 As shown, the suction filtration-electric field device 10 provided by the present invention includes a body 11, a funnel 12, a sand core 13, a pad 14, a filter paper 15, an aluminum electrode 16, an aluminum electrode 17, an AC power supply 18, a wire 19, a wire 20, a storage Liquid bottle (not shown in the figure) and vacuum pump (not shown in the figure).

[0027] The body 11 is a hollow structure made of polymethyl methacrylate. The upper end of the main body 11 is provided with an opening, so that the mixed aqueous dispersion 21 of carbon nanotubes and polyaniline enters the main body 11 through the opening.

[0028] The funnel 12 is connected to the lower end of the body 11, communicates with the body 11, and has a downward outlet.

[0029] The sand core 13 is disposed in the middle of the body 11 .

[0030] A spacer 14 ...

Embodiment 2

[0037] The suction filtration-electric field device 10 in is used to prepare carbon nanotube / polyaniline composite membrane, and the preparation method comprises the following steps:

[0038] Step 1, preparing a mixed aqueous dispersion.

[0039]First, carbon nanotubes (CNTs) are subjected to acidification treatment, and the method of acidification treatment can refer to the literature J. Liu, A.G. Rinzler, H. Dai. Fullerene pipes [J]. Science, 1998, 280, 1253-1256. In this embodiment, the single-walled CNTs after the acidification treatment have a diameter of 1-2 nm and a length of about 1 μm. Then, polyaniline (PANi) nanofibers were prepared by chemical oxidation polymerization. The preparation method is as in the literature H.D.Tran, Y.Wang, J.M.D'Arcy, et al.Toward an understanding of the formation of conducting polymer nanofibers[J].ACS NANO , 2008, 2(9):1841-1848. In this embodiment, the PANi nanofibers prepared by the above method have a diameter of about 40 nm and a...

Embodiment 3

[0049] In this embodiment, the steps of preparing the CNTs / PANi composite membrane are the same as in the second embodiment, but the distance between the aluminum electrode 16 and the aluminum electrode 17 and the filter paper 15 is adjusted to 12 mm.

[0050] image 3 It is the cross-sectional SEM image of the CNTs / PANi composite film prepared in embodiment three;

[0051] Such as image 3 As shown, the thickness of the CNTs / PANi composite film prepared in this example is about 20 μm, and the CNTs are evenly dispersed on the surface of the composite film. lowered.

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Abstract

The invention provides a method of preparing a vertical orderly carbon nano tube / polyaniline composite membrane. The method is characterized by comprising the following steps: a step of preparing a mixed aqueous dispersion liquid, namely, preparing a carbon nano tube subjected to the acidification treatment into a carbon nano tube aqueous dispersion liquid, preparing a polyaniline nano fiber aqueous dispersion liquid, then mixing the carbon nano tube aqueous dispersion liquid with the polyaniline nano fiber aqueous dispersion liquid to perform ultrasonic treatment for 4 hours and mechanical stirring for 30 minutes to obtain the mixed aqueous dispersion liquid; a step of preparing a carbon nano tube / polyaniline composite membrane by cooperating suction filtration with electric fields, namely pouring the mixed aqueous dispersion liquid into a suction filtration-electric field device, applying voltage of 100-250V to filter paper vertically, regulating the suction filtration power to 180W, applying the synergistic effect of the electric fields and the suction filtration to the mixed aqueous dispersion liquid, continuously applying voltage for 24 hours after the suction filtration is ended, then, taking out the filter paper and naturally drying the filter paper in the air to obtain the carbon nano tube / polyaniline composite membrane, wherein a mass ratio of the carbon nano tube to the polyaniline nano fiber in the mixed aqueous dispersion liquid is 5 to 1.

Description

technical field [0001] The invention relates to the preparation of materials, in particular to a method and a device for synergistically preparing a vertically ordered carbon nanotube / polyaniline composite film by adopting a suction filtration method and an electric field method. Background technique [0002] The structure of carbon nanotubes (CNTs) endows them with excellent mechanical, electrical and thermal properties. The CNTs / polymer composite film based on CNTs has been widely studied. The addition of CNTs makes the composite film have high strength, high conductivity and high thermal stability. It is widely used in structural materials, electronic devices, biomedicine and electrochemistry. The field has great application prospects. At present, CNTs / polymer composite films are mainly divided into two types. One is a composite film prepared by simply blending CNTs and polymers. The preparation method is relatively simple, and the CNTs are arranged disorderly in the pol...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/02C08K7/24
Inventor 王霞蔡思思李晓燕廖耀祖丁婕张津瑞
Owner UNIV OF SHANGHAI FOR SCI & TECH
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