Graphene oxide dispersion carbon nanotube solution and preparation method thereof

A technology of carbon nanotubes and graphene, which is applied in the field of graphene oxide dispersed carbon nanotube solution and its preparation, can solve the problems of limited mass fraction of carbon nanotubes, achieve poor dispersion effect, avoid damage, and improve mechanical properties Effect

Inactive Publication Date: 2018-12-21
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the literature "Rapid and low temperature spark plasma sintering synthesis of novelcarbon nanotube reinforced titanium matrix composites" FC Wang, Carbon, 2015,95, 396-407 (rapid low temperature discharge plasma sintering synthesis of carbon nanotube reinforced titanium matrix composi

Method used

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  • Graphene oxide dispersion carbon nanotube solution and preparation method thereof
  • Graphene oxide dispersion carbon nanotube solution and preparation method thereof
  • Graphene oxide dispersion carbon nanotube solution and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Prepare pure carbon nanotube alcohol solution, the steps are as follows:

[0027] 1) Weigh 20mg of carbon nanotubes into a beaker, and add alcohol to a total volume of 100ml to obtain a suspension of carbon nanotubes;

[0028] 2) Ultrasonic dispersion of the suspension of carbon nanotubes for 10 min using an ultrasonic stirrer to obtain a suspension of agglomerated carbon nanotubes after ultrasound.

[0029] The pure carbon nanotube alcohol solution of the present embodiment is dropped on the silicon wafer and left to stand for 3 minutes, and the macroscopic appearance is as follows: figure 1 As shown in (a), the SEM microscopic appearance after dilution is as follows figure 1 As shown in (b): the carbon nanotubes show obvious aggregation phenomenon in the alcohol solution, and the microstructure shows that the carbon nanotubes are agglomerated together and distributed in flocculent form, and the morphology of a single carbon nanotube cannot be distinguished.

[0030]...

Embodiment 2

[0032] The steps of preparing the first graphene oxide dispersed carbon nanotube solution are as follows:

[0033] 1) 1g graphite powder (>325 mesh) and 12.75g CrO 3 Add it to a beaker, slowly add 10.5ml HCl (37.5wt.%), stir in a fume hood at room temperature for 2 hours, wash the product with deionized water until it is colorless, and then dry it in a vacuum oven at 60°C for 12 hours to obtain a graphite intercalation compound;

[0034] 2) Immerse the graphite intercalation compound in 30% H in a large beaker 2 o 2 After 20h in the solution 60ml, wash 3 times to obtain chemically expanded graphite;

[0035] 3) Immerse chemically expanded graphite into 200ml 98% H 2 SO 4 Remove intercalated water for 10 minutes, and filter to remove excess sulfuric acid to obtain dehydrated expanded graphite;

[0036] 4) Dissolve 120ml H in an ice-water bath 2 SO 4 , 13.3ml H 3 PO 4 Mix and stir with dehydrated expanded graphite, and add 6g KMnO within 30min 4 , remove the ice-water...

Embodiment 3

[0043] The steps of preparing the second graphene oxide dispersed carbon nanotube solution are as follows:

[0044] 1) 1g graphite powder (>325 mesh) and 12.75g CrO 3Add it to a beaker, slowly add 10.5ml HCl (37.5wt.%), stir in a fume hood at room temperature for 2 hours, wash the product with deionized water until it is colorless, and then dry it in a vacuum oven at 60°C for 12 hours to obtain a graphite intercalation compound;

[0045] 2) Immerse the graphite intercalation compound in 30% H in a large beaker 2 o 2 After 20h in the solution 60ml, wash 3 times to obtain chemically expanded graphite;

[0046] 3) Immerse chemically expanded graphite into 200ml 98%H 2 SO 4 Remove intercalated water for 10 minutes, and filter to remove excess sulfuric acid to obtain dehydrated expanded graphite;

[0047] 4) Dissolve 120ml H in an ice-water bath 2 SO 4 , 13.3ml H 3 PO 4 Mix and stir with dehydrated expanded graphite, and add 6g KMnO within 30min 4 , remove the ice-water ...

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Abstract

The invention discloses a graphene oxide dispersion carbon nanotube solution and a preparation method thereof. The graphene oxide dispersion carbon nanotube solution comprises a carbon nanotube and agraphene oxide solution, wherein a mass concentration ratio of the graphene oxide and the carbon nanotube in the solution is (1 to 10) to 1. The preparation method comprises the following steps: 1, preparing the graphene oxide solution by adopting an improved Hummers method to control a water addition amount in an oxidation step; 2, weighing the carbon nanotubes, placing the carbon nanotubes intoa container, adding an appropriate amount of graphene oxide solution, diluting the graphene oxide solution by adding alcohol, so as to obtain suspension of the graphene oxide and the carbon nanotubes;and 3, ultrasonically dispersing the suspension of the graphene oxide and the carbon nanotubes by utilizing an ultrasonic stirrer, and obtaining the carbon nanotube dispersion solution comprising thegraphene oxide. By adopting the graphene oxide dispersion carbon nanotube solution and the preparation method thereof, the problems that the carbon nanotubes are poor in dispersion effect and easy insecondary clustering can be solved, the damage of the carbon nanotube structure can also be avoided, and the mechanical performance of a matrix material can be improved.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a graphene oxide dispersed carbon nanotube solution and a preparation method thereof. Background technique [0002] Since the Japanese scientist Sumio Iijima discovered carbon nanotubes on the argon DC arc discharge cathode product in 1991, there has been an upsurge in carbon nanotube research that continues to this day. Carbon nanotubes are graphite tubular structures, which are seamless nanotubes formed by curling graphite sheets according to a certain helical glue. Carbon nanotubes are divided into two types: single-walled and multi-walled, with diameters ranging from a few nanometers to tens of nanometers, lengths ranging from hundreds of nanometers to tens of microns, and the longest ones reaching several millimeters. The aspect ratio of carbon nanotubes is about 100-1000, up to 1000-10000, so it is considered as a typical one-dimensional nanomaterial...

Claims

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Application Information

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IPC IPC(8): C01B32/174C01B32/198
CPCC01B32/174C01B32/198
Inventor 刘许旸刘经奇韦良晓胡宁吕学伟
Owner CHONGQING UNIV
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