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Dispersing method of polyalcohol dispersing agent of one-dimensional carbon nano material

A carbon nanomaterial and dispersant technology, applied in the field of nanomaterials and nanocomposite materials, can solve the problems of affecting product performance, large amount of surfactant and low dispersing ability.

Active Publication Date: 2012-10-03
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still various problems in these carbon nanotube dispersants that have been found, such as low dispersing ability, expensive nucleotides, and the amount of surfactant is often very large, which will greatly affect the follow-up process. Product performance, etc.

Method used

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  • Dispersing method of polyalcohol dispersing agent of one-dimensional carbon nano material
  • Dispersing method of polyalcohol dispersing agent of one-dimensional carbon nano material
  • Dispersing method of polyalcohol dispersing agent of one-dimensional carbon nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 5 mg of one-dimensional carbon nanomaterials (single-walled carbon nanotubes are used as an example here) were mixed with 10 mL of acetone, sonicated for 1 h with a probe-type sonicator, 9 mg of hydroxypropyl methylcellulose was added, and sonicated for another 1 h. The liquid formed in this way is a black solution without obvious precipitation. After being centrifuged at 9,000×g, it can exist stably for more than 3 months (such as figure 1 Show). Simultaneously, also prepare the acetone / carbon nanotube ultrasonic liquid that does not add hydroxypropyl methylcellulose and compare, to show the dispersing effect of hydroxypropyl methylcellulose to carbon nanotube (such as figure 1 Show). The maximum concentration of carbon nanotubes formed by the ultrasonic method of hydroxypropyl methylcellulose / acetone / single-walled carbon nanotubes can reach 5 mg of single-walled carbon nanotubes dispersed in a unit solvent (such as figure 1 Show). It should be noted that the one-di...

Embodiment 2

[0027] In order to further illustrate the dispersing ability of hydroxypropyl methylcellulose to one-dimensional carbon nanomaterials, the ultraviolet-visible-infrared spectra of the hydroxypropyl methylcellulose / acetone / single-walled carbon nanotube solutions prepared by the above method were further measured. Absorption spectra (such as figure 2Show). At the same time, we also used sodium deoxycholate, which is recognized as having good dispersion ability for carbon nanotubes, to prepare ultrasonic solutions of nanotubes for comparison. The principle of UV-visible-infrared absorption spectrum of carbon nanotube solution is based on the following characteristics (J.Chen, M.Hamon, H.Hu, Y.Chen, A.Rao, P.Eklund, and R.Haddon.Science, 1998, 282:95.): If single-walled carbon nanotubes have good dispersion in the solution and exist in the form of single or small bundles, due to the special electronic structure characteristics of single-walled carbon nanotubes (the valence and co...

Embodiment 3

[0030] The dispersant used is other alkyl cellulose or alkyl cellulose derivatives except hydroxypropyl methyl cellulose, such as methyl cellulose hydroxymethyl cellulose, hydroxyethyl methyl cellulose, hydroxyethyl cellulose Base cellulose, ethyl cellulose, methyl hydroxyethyl cellulose etc. also can obtain the similar result of embodiment 1 and embodiment 2 with acetone as solvent.

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Abstract

The present invention relates to a carbon nano-material polymer dispersant and a dispersing method thereof. The carbon nano-material polymer dispersant is characterized in that the carbon nano-material polymer dispersant is alkyl fibrin or a derivative of the alkyl fibrin; a general structural formula is shown at right; in the formula, R is equal to H, CmH2m plus 1 or CpH2pOH, and n, p and m are any positive integer; the dispersing method is characterized in that a one-dimensional carbon nano-material surface is functionalized by forming the non covalent bond combination between a main chain of the polymer dispersant and the one-dimensional carbon nano-material surface; then the surface functionalized one-dimensional carbon nano-material is dispersed in solvent by the dispersant, so as to disperse the one-dimensional carbon nano-material in the solvent.

Description

technical field [0001] The invention relates to a dispersant and a dispersion method for one-dimensional carbon nanomaterials, in particular to a polymer dispersant for one-dimensional carbon nanomaterials, which is used to disperse one-dimensional carbon nanomaterials in solvents . The method belongs to the field of nanomaterials and nanocomposite materials. Background technique [0002] One-dimensional carbon nanomaterials have become a research and application hotspot in recent years due to their huge aspect ratio and excellent physical properties. Among them, carbon nanotubes can be regarded as a tubular structure formed by winding graphene, which has attracted great attention worldwide due to its excellent electrical, mechanical and thermal properties (S. Reich, C. Thomsen, J. Maultzsch. Carbon Nanotubes: Basic Concepts and Physical Properties, 2004, WILEY-VCH Verlag GmbH & KGaA). Potential applications related to one-dimensional carbon nanomaterials involve almost a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/48C09K23/48
Inventor 万冬云周振平黄富强
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI