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Method for preparing GO (graphene oxide) gel with multiple stimulus responses

A multiple stimuli response, graphene gel technology, applied in the field of graphene oxide gel preparation, to achieve the effect of mild reaction conditions and less pollution

Active Publication Date: 2016-06-08
江苏奥净嘉环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for preparing GO (graphene oxide) gel with multiple stimulus responses
  • Method for preparing GO (graphene oxide) gel with multiple stimulus responses
  • Method for preparing GO (graphene oxide) gel with multiple stimulus responses

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preparation example Construction

[0031] The preparation of polymer A among the present invention, the preparation of functionalized GO and the method that polymer and functionalized GO form gel are as follows:

[0032] In the reactor, add the first monomer (B) containing ketone carbonyl or aldehyde group and the second monomer C with temperature response according to a certain ratio, add a certain amount of solvent, stir and feed high-purity nitrogen 0.5- 1h, by adding a certain proportion of initiator (0.1%-10%), under the protection of nitrogen, control the temperature of the reactor at 20-80°C to react for 6-24h. After the reaction, the solvent is removed by settling and washing, and the polymer A containing ketone carbonyl or aldehyde group and temperature-sensitive structure is obtained after purification.

[0033] In the reactor, a certain concentration of GO solution and excess compound D containing hydrazide bond were reacted under alkaline conditions at 60-80°C for 6-24h, and the GO functionalized by...

Embodiment 1

[0036] In the reactor, the first monomer B (containing ketone carbonyl or aldehyde group in the monomer) and the second monomer C (containing the temperature-responsive structural unit) (the molar ratio of B to C is 3:97), dissolved In DMSO, add a certain proportion of initiator, stir and flow high-purity nitrogen for 0.5h, and react at 65°C for 24h under the protection of nitrogen. After the reaction is completed, the polymer is precipitated in ether to obtain a polymer A containing a ketone carbonyl group or an aldehyde group and a temperature-sensitive structure.

[0037] In the reactor, add excess KOH and adipic dihydrazide, a compound containing a hydrazide bond, to 0.1 mg / ml GO solution, stir and dissolve at room temperature for 10 min, and heat up to 80°C for 24 h. Suction filtration and washing yielded GO functionalized with hydrazide linkages.

[0038] In a small beaker, mix a certain amount of polymer A and GO functionalized with hydrazide bonds in a certain ratio (...

Embodiment 2

[0040]In the reactor, the first monomer B (monomer containing ketone carbonyl or aldehyde group) and the second monomer C (containing temperature-responsive structural units) (the molar ratio of B to C is 5:95) were dissolved in In DMSO, add a certain proportion of initiator, stir and flow high-purity nitrogen for 0.5h, and react at 65°C for 24h under the protection of nitrogen. After the reaction was completed, the polymer was precipitated in ether to obtain the polymer A with dual stimuli responses to pH and temperature.

[0041] In the reactor, 0.1 mg / ml GO solution was added with excess KOH and oxalylhydrazide, a compound containing a hydrazide bond, stirred and dissolved at room temperature for 10 min, and then heated to 80°C for 24 h. Suction filtration and washing yielded GO functionalized with hydrazide linkages.

[0042] In a small beaker, mix a certain amount of polymer A and GO functionalized with hydrazide bonds in a certain ratio (the ratio of ketone carbonyl to ...

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Abstract

The invention discloses a method for preparing GO (graphene oxide) gel with multiple stimulus responses. The method comprises the step of preparing a polymer containing a ketonic carbonyl group or an aldehyde group and a thermo-sensitive type structural unit, wherein the polymer can be prepared into the GO gel with the stimulus responses through the action between the ketonic carbonyl group or the aldehyde group and hydrazide-bonding functionalized GO. The GO gel can reversibly realize conversion between sol and gel and volumetric shrinkage-expansion change under multiple stimulations of pH, temperature and NIR (Near Infrared Ray). The GO gel with the multiple stimulus responses has great potential application value in the fields of bio-sensing, controlled drug release and the like.

Description

technical field [0001] The invention relates to a preparation method of graphene oxide gel with multiple stimulus responses, belonging to the technical field of intelligent materials. Background technique [0002] Graphene oxide (GO) has attracted much attention due to its unique optical, electrical, thermal, and mechanical properties. In recent years, GO gels prepared based on self-assembly methods have shown great application potential in the fields of electronic devices, energy storage, biosensors, and drug loading. However, pure GO gels usually lack the ability to sense changes in the external environment. For example, due to the refolding and agglomeration of GO sheets, it will lead to the irreversibility of its volume. This will greatly limit the scope of application of GO. In order to solve this problem, the most adopted method is to introduce smart polymers into GO. Smart polymers can sense small changes in the environment (such as temperature, pH, light, pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L33/24C08K9/04C08K3/04C08F220/54C08F216/34C08F220/58C08F220/30
CPCC08F220/54C08J3/075C08K3/04C08K9/04C08J2333/24C08L33/24C08F220/305C08F220/58
Inventor 郭赞如吕展马伟陈强陈爱喜
Owner 江苏奥净嘉环保科技有限公司
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