Preparation method of environmental response type graphene hybrid material

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

Inactive Publication Date: 2013-07-17
ANKANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Because graphene is difficult to dissolve or disperse in

Method used

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  • Preparation method of environmental response type graphene hybrid material
  • Preparation method of environmental response type graphene hybrid material
  • Preparation method of environmental response type graphene hybrid material

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preparation example Construction

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

[0029] (1) Under nitrogen protection, graphene and RAFT chain transfer agent 2-(dodecyl trithiocarbonate group)-2-methyl propionic acid-3-azidopropyl ester in o-dichlorobenzene Ultrasonic disperse for 30~60 minutes, heat up to 120~160 o C, react for 40 to 60 hours, cool to room temperature, filter and wash with ethanol for 4 to 6 times, and dry to obtain the graphene anchoring the RAFT chain transfer agent on the surface;

[0030] (2) Ultrasonic disperse the above-mentioned graphene with RAFT chain transfer agent anchored on the surface in an organic solvent for 30-60 minutes, add monomer and initiator azobisisobutyronitrile, and 50-80 minutes under nitrogen protection o C reacted for 2 to 48 hours, filtered, washed with chloroform and methanol for 5 to 8 times, and dried to obtain the environment-responsive polymer-grafted graphene hybrid materia...

Embodiment 1

[0034] Dissolve 200 mg graphene oxide and 10 mg 2-(dodecyltrithiocarbonate)-2-methylpropanoic acid-3-azidopropyl ester in 25 mL o-dichlorobenzene and ultrasonically disperse for 30 minutes, under nitrogen protection, 120 o C was reacted for 50 hours. Cool to room temperature, filter and wash with ethanol for 4 times, and dry to obtain graphene oxide with RAFT chain transfer agent anchored on the surface.

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

[0036] figure 1 For the transmission electron microscope photo of the hybrid material, changin...

Embodiment 2

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

[0039] Graphene oxide functionalized with 100 mg of the above RAFT chain transfer agent was ultrasonically dispersed in 100 mL of 1,4-dioxane for 30 min, and 4 g of diethylaminoethyl methacrylate and 6.9 mg of azobisiso Nitrile, under nitrogen protection 70 o C was reacted for 12 hours. Filter, wash with chloroform and methanol three times respectively, and dry to obtain a pH-sensitive polydiethylaminoethyl 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, belonging to the technical field of organic-inorganic hybrid material preparation. Background technique [0002] Graphene has unique electrical, thermal, mechanical, optical, 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 common solvents, its industrial application is limited. [0003] Environment-responsive polymers, that is, smart polymers, are a newly developed class of new functional polymer materials, which can quickly respond to changes in small stimulus signals such as temperature, pH, and ionic strength in the external environment. There are mutations in structure, physical properties and chemical properties, so they are widely used in drug controlled release materials, tissue engineering, adsorb...

Claims

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Application Information

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IPC IPC(8): C08F292/00
Inventor 罗文谦陈久存胡敏
Owner ANKANG UNIV
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