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Method for preparing aligned carbon nanotube on surface of polymeric membrane

A polymer film, carbon nanotube technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem that carbon nanotubes are difficult to use directly, the carbon nanotube array is hard, and the preparation cost is high. problem, to achieve the effect of easy large-scale production and application, wide range and simple preparation method

Inactive Publication Date: 2014-04-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the preparation of carbon nanotube arrays by vapor deposition requires a relatively hard substrate, and the prepared carbon nanotubes are difficult to use directly, and often need to be transferred again; magnetic field and electric field orientation methods often require advanced equipment, and the preparation cost is too high.

Method used

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  • Method for preparing aligned carbon nanotube on surface of polymeric membrane
  • Method for preparing aligned carbon nanotube on surface of polymeric membrane
  • Method for preparing aligned carbon nanotube on surface of polymeric membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for preparing acidified modified single-walled carbon nanotubes on the surface of a polysulfone membrane. The specific steps are as follows:

[0042] (1) Add 2g of single-walled carbon nanotubes (Shenzhen Nanoport Co., Ltd., 1-3nm in diameter and 1-5μm in length) to 100ml of concentrated sulfuric acid / concentrated nitric acid mixed acid (concentrated H 2 SO 4 : concentrated HNO 3 Volume ratio = 3:1), modified at 80°C for 12 hours, then filtered, washed, and dried to obtain modified single-walled carbon nanotubes;

[0043] (2) Dispersing 0.02g modified single-walled carbon nanotubes in water, and obtaining a uniformly dispersed modified single-walled carbon nanotube dispersion with a concentration of 0.1g / L after ultrasonic treatment;

[0044] (3) The modified single-walled carbon nanotube dispersion is evenly deposited on the surface of the polysulfone polymer membrane (Hangzhou Water Treatment Technology Research and Development Cent...

Embodiment 2

[0048] The implementation is the same as in Example 1, only the single-walled carbon nanotubes in the raw material are replaced with multi-walled carbon nanotubes (Shenzhen Nanoport Co., Ltd., diameter 1-7nm, length 1-5μm), and the obtained aligned carbon nanotubes The tube was similar to that in Example 1.

Embodiment 3～6

[0050] The implementation is the same as in Example 1, except that sulfuric acid, nitric acid, potassium permanganate or a mixture of the three (mass ratio 5:2:1) is used as the oxidizing agent to change the oxidation treatment, and the obtained aligned carbon nanotubes are the same as those in Example 1. similar.

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Abstract

The invention discloses a method for preparing an aligned carbon nanotube on the surface of a polymeric membrane. The method comprises the following steps: firstly, performing modification treatment on a carbon nanotube, collecting the treated modified carbon nanotube, and drying; secondly, dispersing the carbon nanotube subjected to the modification treatment in a polar solvent to obtain an uniformly dispersed modified carbon nanotube dispersion liquid through treatment; thirdly, uniformly depositing the modified carbon nanotube dispersion liquid on the surface of a polymeric membrane, and then covering the membrane surface on which the modified carbon nanotube is deposited through another layer of polymeric membrane to form a three-layer structure; finally, after the three-layer structure is treated through hot pressing, slowly pulling and stripping the outside two layers of membranes of the three-layer structure to obtain the aligned carbon nanotube. According to the invention, the advance design of the carbon nanotube before preparation is not required to be considered, and the range of the selectable carbon nanotubes is wide; the preparation method is simple, and easy to realize, and facilitates actual preparation and production; the alignment of the carbon nanotube on the surface of the soft polymeric membrane can be implemented, and the further application of the aligned carbon membrane is facilitated.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for preparing aligned carbon nanotubes on the surface of a polymer film. Background technique [0002] Carbon nanotubes are columnar or layered tubes made of single-layer or multi-layer graphene wound coaxially. Its hollow structure is a natural molecular channel. The flow rate ratio of various molecules in the tube is The usual micropore flow rate is 4 to 5 orders of magnitude faster, especially for water molecules. In addition, carbon nanotubes have unique properties in mechanical, optical, electrical, heat transfer and other aspects, showing broad application prospects. However, the one-dimensional structural characteristics of carbon nanotubes determine that when utilizing the excellent properties of carbon nanotubes, the structure and spatial regularity of carbon nanotubes must be guaranteed, which requires that carbon nanotubes exist in an extended state an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y40/00B82Y30/00C01B32/168C01B32/174
Inventor 张林赵海洋周志军侯立安
Owner ZHEJIANG UNIV
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