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A kind of preparation method of environment-responsive graphene hybrid material

A technology of graphite and graphene, applied in the field of environment-responsive graphene hybrid materials and their preparation, can solve the problems of limited application, difficulty in dissolving or dispersing, and achieves simple steps, stable structure, good solubility and dispersibility Effect

Inactive Publication Date: 2016-08-03
ANKANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because graphene is difficult to dissolve or disperse in general solvents, its industrial application is limited.

Method used

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  • A kind of preparation method of environment-responsive graphene hybrid material
  • A kind of preparation method of environment-responsive graphene hybrid material
  • A kind of preparation method of environment-responsive graphene hybrid material

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preparation example Construction

[0028] Specifically, the preparation method of the graphene hybrid material of the present invention includes the following steps:

[0029] (1) Under the protection of nitrogen, the graphene and RAFT chain transfer agent 2-(dodecyl trithiocarbonate)-2-methylpropionate-3-azidopropyl ester are in o-dichlorobenzene Ultrasonic dispersion for 30~60 minutes, heating to 120~160 o C, react for 40-60 hours, cool to room temperature, filter and wash with ethanol 4-6 times, and dry to obtain the graphene with the surface anchored RAFT chain transfer agent;

[0030] (2) Disperse the graphene with the above-mentioned surface anchoring RAFT chain transfer agent in an organic solvent ultrasonically for 30-60 minutes, add monomer and initiator azobisisobutyronitrile, and under nitrogen protection for 50-80 o C react for 2 to 48 hours, filter, wash with chloroform and methanol for 5 to 8 times, and dry to obtain an environmentally responsive polymer grafted graphene hybrid material;

[0031] The orga...

Embodiment 1

[0034] Dissolve 200 mg of graphene oxide and 10 mg of 2-(dodecyl trithiocarbonate)-2-methylpropionic acid-3-azidopropyl ester in 25 mL of o-dichlorobenzene, disperse ultrasonically for 30 minutes, and protect with nitrogen. Down, 120 o C reacts for 50 hours. Cool to room temperature, filter and wash with ethanol 4 times, and dry to obtain graphene oxide with the surface anchored RAFT chain transfer agent.

[0035] The above 100 mg of graphene oxide functionalized with RAFT chain transfer agent was ultrasonically dispersed in 100 mL 1,4-dioxane for 30 minutes, and 5 g N-isopropylacrylamide and 11.6 mg azobisisobutyronitrile were added under nitrogen protection 70 o C reacts for 12 hours. Filter, wash with chloroform and methanol 3 times each, and dry to obtain a temperature-sensitive poly N-isopropylacrylamide grafted graphene oxide hybrid material.

[0036] figure 1 For the transmission electron micrograph of the hybrid material, by changing the reaction time of step (2), it can ...

Embodiment 2

[0038] Dissolve 300 mg of graphene oxide and 10 mg of 2-(dodecyl trithiocarbonate)-2-methylpropionic acid-3-azidopropyl ester in 25 mL of o-dichlorobenzene, and ultrasonically disperse for 30 minutes, under nitrogen protection Down, 120 o C reacts for 50 hours. Cool to room temperature, filter and wash with ethanol 4 times, and dry to obtain graphene oxide with the surface anchored RAFT chain transfer agent.

[0039] The graphene oxide functionalized with the above 100mg RAFT chain transfer agent was ultrasonically dispersed in 100mL 1,4-dioxane for 30 minutes, 4g diethylaminoethyl methacrylate and 6.9mg azobisisobutyronitrile were added, protected by nitrogen Under 70 o C reacts for 12 hours. Filter, wash with chloroform and methanol 3 times each, and dry to obtain a pH-sensitive poly(diethylaminoethyl methacrylate) grafted graphene oxide hybrid material.

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Abstract

The invention discloses a preparation method of an environmental response type graphene hybrid material. The preparation method comprises the following steps of: (1) anchoring an RAFT (Reversible Addition Fragmentation Chain Transfer) agent on the surface of graphene; and (2) triggering a functional monomer to polymerize by utilizing the RAFT agent on the surface of the graphene to obtain an environmental response type polymer grafted graphene hybrid material. The preparation method disclosed by the invention is simple, mild in polymerization condition and suitable for large-scale production; and the prepared functional graphene has controllability for the thickness of a polymer on the surface, favorable response to the simulation for the external environment and long-term dispersibility in a solvent.

Description

Technical field [0001] The invention relates to an environment-responsive graphene hybrid material and a preparation method thereof, and belongs to the technical field of organic-inorganic hybrid material preparation. Background technique [0002] Graphene has unique electrical conductivity, thermal conductivity, mechanical properties, optical properties and electrical properties, and has become a research hotspot in many disciplines such as physics, chemistry, and materials science. Because graphene is difficult to dissolve or disperse in general solvents, its industrial application is limited. [0003] Environmentally responsive polymers, namely smart polymers, are a new type of functional polymer materials that have been developed recently. They can respond quickly to changes in the external environment such as temperature, pH and ionic strength. Mutations occur in structure, physical properties and chemical properties, so it is widely used in drug controlled release materials,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00
Inventor 金燕子罗文谦陈久存胡敏
Owner ANKANG UNIV
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