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Oxidized graphene or graphene/inorganic particle core/shell material and preparation method thereof

A technology of inorganic particles and graphene, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of preparation methods of hybrid materials with "core/shell" structure, etc., to change the physical and chemical properties of the surface and expand the application Space and cost reduction effect

Active Publication Date: 2012-02-08
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there have been no literature reports on graphene oxide or "core / shell" structure hybrid materials formed by graphene and inorganic particles and their preparation methods.

Method used

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  • Oxidized graphene or graphene/inorganic particle core/shell material and preparation method thereof
  • Oxidized graphene or graphene/inorganic particle core/shell material and preparation method thereof
  • Oxidized graphene or graphene/inorganic particle core/shell material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] First, mix 10 g of submicron spherical silica (average particle size 500 nm) with 200 mL of ethanol / water solution (98 / 2, v / v) under high-speed stirring for 30 min to obtain a uniform suspension, and then add 0.2 g coupling agent KH550, heated to 60°C and stirred for 10 hours, then centrifuged and washed 3-4 times with deionized water to remove ungrafted coupling agent to obtain modified silica.

[0032] Prepare 200 mL of graphene oxide aqueous dispersion with a concentration of 0.5 mg / mL, and oscillate ultrasonically at room temperature to uniformly disperse it. Add the silica treated with the coupling agent KH550 into deionized water, stir to disperse evenly, and prepare 200 g of a suspension with a silica content of 5 wt%. Add the prepared silicon dioxide suspension dropwise into the graphene oxide dispersion under stirring. After the dropwise addition, let it stand for 10 minutes. It can be seen that the color of the supernatant becomes lighter, and the color of the...

Embodiment 2

[0034] First, mix 2.5g of titanium dioxide (average particle size 200nm) with 200mL of ethanol / water solution (98 / 2, v / v) under high-speed stirring for 30min to obtain a uniform suspension, then add 0.3g of coupling agent A1100 to the suspension , and heated up to 60° C. and stirred for 10 h, and centrifuged and washed with deionized water for 3-4 times to remove ungrafted coupling agent to obtain modified titanium dioxide.

[0035] 1000 mL of graphene oxide aqueous dispersion with a concentration of 0.05 mg / mL was prepared, and ultrasonically oscillated at room temperature to uniformly disperse it. Add the titanium dioxide treated with the coupling agent A1100 into distilled water, stir to disperse evenly, and prepare 500 g of a suspension with a titanium dioxide content of 0.5 wt%. Add the prepared titanium dioxide suspension dropwise into the graphene oxide dispersion under stirring. After the dropwise addition, let it stand for 10 minutes. It can be seen that the color of ...

Embodiment 3

[0037] First, mix 10g of micron-grade alumina (average particle size 1μm) with 200mL of ethanol / water solution (98 / 2, v / v) under high-speed stirring for 30min to obtain a uniform suspension, and then add 0.2g of coupling Agent A1170, heated to 60°C and stirred for 10 hours, centrifuged and washed with deionized water for 3-4 times to remove ungrafted coupling agent to obtain modified alumina.

[0038] Prepare 25 mL of graphene oxide aqueous dispersion with a concentration of 2 mg / mL, and oscillate ultrasonically at room temperature to disperse it evenly. The alumina treated with the coupling agent A1170 was added into deionized water, stirred to disperse evenly, and prepared into 50 g of a suspension with an alumina content of 20 wt%. Add the prepared alumina suspension dropwise into the graphene oxide dispersion liquid under stirring. After the dropwise addition, let it stand for 10 minutes. It can be seen that the color of the supernatant becomes lighter, and the color of th...

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Abstract

The invention firstly discloses an oxidized graphene or graphene / inorganic particle core / shell material which is formed by electrostatic self-assembly, wherein inorganic particles are taken as the core of the material, oxidized graphene or graphene is taken as a shell layer, and the content of the oxidized graphene or the graphene is 0.1-2wt% of that of the inorganic particles. The invention alsodiscloses a preparation method of the oxidized graphene or graphene / inorganic particle core / shell material. Therefore, a new species is added for outer-coated inorganic powder materials and the application space of the inorganic particles is expanded; furthermore, the electrostatic self-assembly technology is further applied to the preparation of the oxidized graphene or graphene-inorganic powderhybrid material, and the method simultaneously has the characteristics of being mature and environmentally-friendly in process, being simple to operate, having no need of complex equipment, being easy for realization of large-scale production and the like.

Description

technical field [0001] The invention belongs to the technical field of coated inorganic particle core / shell material and its preparation, and specifically relates to a "core / shell" structure hybrid material formed by self-assembly of graphene oxide or graphene and modified inorganic particles and a preparation method. Background technique [0002] With the development of science and technology, people's requirements for materials are not only getting higher and higher, but also the development of many high-tech fields cannot do without new materials as their foundation and support, which makes the development of new materials fields change with each passing day. Therefore, the synthesis, preparation and application of new materials are considered to be one of the most attractive research fields in today's scientific and technological circles. [0003] Inorganic micro-nano materials are widely used in the material industry because of their functional characteristics such as n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 陈枫陈立傅强宁南英
Owner SICHUAN UNIV
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