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Preparation of PNIPAM-RGO graphene composite material and application thereof on smart response modified electrode

A technology of composite materials and modified electrodes, which is applied in the field of biosensors, can solve the problems of cumbersome synthesis methods and limit the application of complexes, and achieve good electron transport effects

Active Publication Date: 2016-08-24
沈阳工大蓝金环保产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis methods reported so far are too cumbersome, which limits the further application of the complex.

Method used

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  • Preparation of PNIPAM-RGO graphene composite material and application thereof on smart response modified electrode
  • Preparation of PNIPAM-RGO graphene composite material and application thereof on smart response modified electrode
  • Preparation of PNIPAM-RGO graphene composite material and application thereof on smart response modified electrode

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1 (purification of N-isopropylacrylamide NIPAM)

[0035]Add 10.0020g of NIPAM monomer into a two-necked round-bottomed flask, heat and drop acetone until the NIPAM is completely dissolved, cool to reflux, and add n-hexane dropwise until a white substance appears after adding n-hexane (V acetone: V n-hexane = 1:6 ), stop heating, cool to room temperature, transfer to 0°C for 10 hours, and transfer to -10°C for 20 hours. After the crystals were precipitated, they were taken out for suction filtration and washed with n-hexane. Dry under vacuum at room temperature.

Embodiment 2

[0036] Embodiment 2 (preparation of graphene oxide)

[0037] Graphene oxide was prepared by the Hummer method. Add 67.5mL of concentrated sulfuric acid to the three-neck round bottom flask, then place it in an ice-water bath, then add 2.0011g of high-purity graphite and 1.6003g of NaNO 3 , after stirring evenly, add 9.0002g of potassium permanganate solid, then react in a water bath between 32-38°C for 30min, then place it at room temperature for 7 days, finally dilute with 560.0mL of hot water, add 3% H 2 o 2 Until the solution is bright yellow, let stand for 1h, centrifuge GO (10000rpm, 10min), wash the GO solution with 0.01M NaOH to neutral, then wash with water to wash off excess SO 4 2- , tested with saturated barium acetate until there is no white precipitate, and finally washed twice with ethanol, and the product was dried in a vacuum oven for later use.

Embodiment 3

[0038] Embodiment 3 (preparation of poly-N-isopropylacrylamide PNIPAM)

[0039] Take 1.0005g of NIPAM, dissolve it in 30.0mL of water, add 17.0mg of azobisisobutylamidine hydrochloride (AIBA), and react at 70°C for 2h to obtain PNIPAM polymer.

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Abstract

The invention discloses a PNIPAM-RGO graphene composite material. A preparation method comprises the steps that azobis(isobutyramidine)hydrochloride is adopted as an initiator, valence bonds of the initiator is immobilized on a graphene oxide substrate, and then the graphene composite material modified by smart macromolecules is prepared through atom free radical polymerization. The PNIPAM-RGO graphene composite material has different responses for temperature changes, various electrochemical technologies are used for researching the smart electrochemical response of a PNIPAM-RGO modified electrode, and a research result shows that the PNIPAM-RGO modified electrode has the advantages of both PNIPAM and RGO, namely the good smart responsivity of the PNIPAM and the good electronic transmission of the RGO. In the research, detection of the PNIPAM-RGO / GC modified electrode on the dopamine electrochemical catalysis performance and concentration under different temperatures is further explored.

Description

technical field [0001] The invention belongs to the field of biosensors, and in particular relates to the preparation of a PNIPAM-RGO graphene composite material and its application in intelligent responsive modified electrodes. Background technique [0002] Biosensors are detection devices that use bioactive substances such as enzymes, immune system, antibodies, animal tissues, and organelles as recognition elements, and combine with physical and chemical converters to convert concentrations into electrical signals. Biosensor is a kind of chemical sensor, which has high sensitivity, high efficiency, low detection limit, specific response to target, and can be analyzed on-line or even in vivo, so it has attracted great attention. Among them, enzyme electrochemical sensors, also known as enzyme electrodes, are the most widely used type of sensors. [0003] In recent years, temperature-sensitive polymers have received extensive attention in the field of biosensors due to thei...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/327G01N27/48G01N27/26C08F120/54C08K3/04
CPCC08F120/54C08K3/04G01N27/26G01N27/308G01N27/3277G01N27/48
Inventor 夏立新张秋月张谦张俊慧
Owner 沈阳工大蓝金环保产业技术研究院有限公司
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