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Graphene-polyaniline modified carbon nanotube compound and preparation method thereof

A technology of carbon nanotubes and polyaniline, which is applied in the field of graphene-polyaniline modified carbon nanotube composites and its preparation, can solve the problem of increasing the distance between graphene sheets, the hindrance of electron delocalization, and the inability to fundamentally solve the problem of graphene Problems such as agglomeration, to achieve the effect of controllable electrical performance, enhanced electrical performance, and short cycle

Active Publication Date: 2015-04-01
南通市盛远石墨烯新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Polyaniline particles are deposited on graphene and carbon nanotubes. Polyaniline increases the distance between graphene sheets. Although it can effectively improve the agglomeration of graphene, polyaniline particles are deposited on the surface of graphene, making graphene Electron delocalization of surface conjugation is hindered
[0009] There are also literatures (Jin Yu, Chen Hongyuan, Chen Minghai, Liu Ning, Li Qingwen. Acta Physicochemical Sinica, 2012; 28(3); 609-614.) reported a method to deposit polyaniline on carbon nanotubes by electrochemical method, The method of reabsorbing graphene to prepare carbon nanotube / polyaniline / graphene composite nano-carbon paper with sandwich structure can only absorb a small amount of graphene, and cannot fundamentally solve the problem of graphene agglomeration

Method used

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  • Graphene-polyaniline modified carbon nanotube compound and preparation method thereof
  • Graphene-polyaniline modified carbon nanotube compound and preparation method thereof
  • Graphene-polyaniline modified carbon nanotube compound and preparation method thereof

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Embodiment 1

[0031] 1. Preparation of hydrochloric acid-doped polyaniline-modified carbon nanotubes

[0032] in N 2Under protection, at 0-5°C, disperse 1g of multi-walled carbon nanotubes into 500mL of deionized water, add 0.99g of sodium dodecyl sulfate, and mix for 0.5h under stirring; then add 0.4g of aniline, and Add 100mL hydrochloric acid solution (0.043mol / L), and mix well under stirring conditions for 1h; slowly add 100mL ammonium persulfate solution (0.043mol / L) dropwise, after the dropwise addition, react for 6h, after the reaction, filter and wash and drying to obtain hydrochloric acid-doped polyaniline-modified carbon nanotubes. The infrared spectrogram, Raman spectrogram, X-ray diffraction pattern, scanning electron microscope pattern and electrical conductivity at 1 Hz of the prepared hydrochloric acid-doped polyaniline-modified carbon nanotubes are shown in the appendix respectively. figure 1 , 2 , 3, 4 and 5.

[0033] 2. Preparation of graphite oxide

[0034] Take 2g o...

Embodiment 2

[0046] Weigh 1g of graphite oxide (prepared according to Example 1) and disperse it in 500mL of deionized water, stir and sonicate for 1h to obtain a graphene oxide dispersion, add 0.50g of hydrochloric acid doped polyaniline-modified carbon nanotubes (according to Example 1 Preparation) into the graphene oxide dispersion, ultrasonically stirred, reacted at 60°C for 12h, then added 10g L-ascorbic acid, raised the temperature of the reaction solution to 80°C and reacted for 24h, then soaked in 500mL of 1mol / L ammonia water for 1h , after suction filtration, washing and drying, a graphene-polyaniline-modified carbon nanotube composite is obtained, wherein the mass of the polyaniline-modified carbon nanotube is twice that of the graphene. The prepared graphene-polyaniline modified carbon nanotube composite X-ray diffraction figure, scanning electron microscope figure, electrical conductivity at 1Hz refer to the appendix respectively. image 3 , 4 and 5.

Embodiment 3

[0048] Weigh 1g of graphite oxide (prepared according to Example 1) and disperse it in 500mL of deionized water, stir and sonicate for 1h to obtain a graphene oxide dispersion, add 1.0g of hydrochloric acid doped polyaniline-modified carbon nanotubes (according to Example 1 Preparation) into the graphene oxide dispersion, ultrasonically stirred, reacted at 60°C for 12h, then added 10g L-ascorbic acid, raised the temperature of the reaction solution to 80°C and reacted for 24h, then soaked in 500mL of 1mol / L ammonia water for 1h , after suction filtration, washing, and drying, a graphene-polyaniline-modified carbon nanotube composite is obtained, wherein the mass of hydrochloric acid-doped polyaniline-modified carbon nanotubes is twice that of graphene. The prepared graphene-polyaniline modified carbon nanotube composite X-ray diffraction pattern, scanning electron microscope image, and electrical conductivity at 1 Hz are shown in the appendix respectively. image 3 , 4 and 5....

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Abstract

The invention discloses a graphene-polyaniline modified carbon nanotube compound and a preparation method thereof. The preparation method comprises the following steps of dispersing graphite oxide in deionized water, adding a hydrochloric acid doped polyaniline modified carbon nanotube, reacting to obtain a reactant and filtering, washing, and drying the reactant to obtain the graphene-polyaniline modified carbon nanotube compound. Modified carbon nanotubes are interspersed among graphene sheets and thus the connection among the sheets is isolated and the problem that graphene is easily stacked is solved. By coating grapheme with the modified carbon nanotube through a physical method, the excellent electrical performance of graphene is maintained and the Pi-electron delocalization of the graphene conjugated planes cannot be hindered. By adding the compound into a polymer, the dielectric constant can be effectively increased, the electric conductance loss caused by the mutual contact among the graphene sheets is significantly decreased and the preparation method has obvious advantage in preparation of a composite material having both high dielectric constant and low dielectric loss. The preparation method of the compound has the characteristics of short period, simplicity in process and environment friendliness.

Description

technical field [0001] The invention particularly relates to a graphene-polyaniline modified carbon nanotube composite and a preparation method thereof, belonging to the technical field of inorganic nanomaterials. Background technique [0002] High dielectric constant materials (referred to as high dielectric materials) have great application value in electronics, aerospace, biomedicine and other fields. Graphene, as a two-dimensional structure, has attracted extensive attention from researchers of high dielectric materials due to its high conductivity and large specific surface area. However, due to the van der Waals force between graphene sheets, it is easy to stack, so that its excellent electrical properties cannot be reflected, so people often modify the surface of graphene. [0003] Graphene surface modification can be divided into chemical and physical methods. Jiang et al. used chemical methods to connect hyperbranched polyaramids on the surface of g...

Claims

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Application Information

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IPC IPC(8): C09C1/46C09C3/06C09C3/10C09C3/00H01B1/24
CPCC09C1/46C09C3/06C09C3/10
Inventor 顾嫒娟王童星梁国正袁莉
Owner 南通市盛远石墨烯新材料有限公司
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