Preparation method of coupling agent gas phase modified graphite nanosheet composite powder

A technology of graphite nanosheets and composite powders, applied in the directions of graphite, chemical instruments and methods, dyed organosilicon compound processing, etc., can solve the problems of many operation procedures and complicated processes.

Active Publication Date: 2019-11-08
HARBIN INST OF TECH AT WEIHAI +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the problems of graphite nano-scale microchips (or graphene), titanate or silane compound modification mostly using solvent or water phase method in the prior art, many operating procedures and complicated processes, etc., and proposes a Preparation method of coupling agent gas-phase modified graphite nanosheet composite powder with the advantages of simple preparation, simple process, and easy availability of raw materials

Method used

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  • Preparation method of coupling agent gas phase modified graphite nanosheet composite powder

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Embodiment 1

[0017] A preparation method of silane coupling agent and graphite nanosheet composite powder, which is carried out as follows: take 1 liter of commercially available KH560 silane coupling agent solution, put figure 1 In the tank shown, use a commercially available air pump from figure 1 In the direction indicated by the arrow, the compressed air is input into the silane coupling agent liquid to bubble, and after the airtight tank is filled with the mixed gas, the expanded graphite and the coupling agent are mixed by the inlet of the fluidized bed jet mill using negative air pressure. The mixed gas is sent into the crushing chamber at the same time. In the crushing chamber, the expanded graphite collides at a high speed under the coupling agent atmosphere, and the coupling agent molecules are attached to the surface of the crushed graphite nanopowder. After classification by the classifier, the silane-modified graphite nanopowder is collected.

Embodiment 2

[0019] A preparation method of titanate coupling agent and graphite nanosheet composite powder, which is carried out as follows: take 1 liter of commercially available 201 titanate coupling agent solution, put figure 1 In the tank shown, use a commercially available air pump from figure 1 Inlet in the direction indicated by the arrow, input compressed air into the titanate coupling agent liquid for bubbling, the selected commercially available coupling agent is in a dilute solution state, and the compound atmosphere of the coupling agent can be realized by bubbling with an air pump; airtight tank After the mixed gas is filled, the mixed gas of expanded graphite and coupling agent is sent into the crushing chamber at the same time through the inlet port of the fluidized bed jet mill by negative air pressure. In the crushing chamber, the expanded graphite is in the atmosphere of the coupling agent, A high-speed collision occurs, and at the same time, the coupling agent molecules...

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Abstract

The invention relates to a graphite nano powder modification process, in particular to a preparation method of a composite powder of a silane or titanate coupling agent compound and a graphite nanosheet. The method is characterized in that the silane or titanate coupling agent compound is used to form a coupling agent atmosphere by bubbling, high speed and high energy effects are carried out in apreparation process of the graphite nanosheet, interaction of the coupling agent molecule and the graphite nanosheet is promoted, and the silane or titanate compound is attached on the surface of thegraphite nanosheet to form the modified powder of the graphite nanosheet. Compared with the prior art, the technology of the method is simple, and when the composite powder modified by attaching the coupling agent compound on the surface of the graphite nanosheet is used in various products such as paints and inks, dispersion of the graphite nanosheet powder in the products is enhanced.

Description

technical field [0001] The invention relates to a modification process, in particular to a method for preparing a coupling agent gas-phase modified graphite nano-sheet composite powder by using a gas-phase compound to attach a coupling agent compound to the surface of graphite nano-sheets to obtain a composite powder . Background technique [0002] When graphite nanomaterials are applied in many fields, surface modification is required to improve the application characteristics to meet the needs of various applications. Where the surface loading TiO 2 , -COOH, -OH and other compound modification is a commonly used method. Existing carbon materials, such as carbon nanotubes, graphite, carbon fibers, etc., all have surface modification processes using compounds. Surface modification with coupling agents is a common method for enhancing surface and interface properties of carbon materials. The modification of titanate coupling agent and silane coupling agent in the past mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/12C09C3/06C01B32/21
CPCC09C1/46C09C3/06C09C3/063C09C3/12C01B32/21
Inventor 王春雨钟博赵晓军姜大海
Owner HARBIN INST OF TECH AT WEIHAI
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