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A method for the synthesis of water-soluble conductive polymers catalyzed by nanometer black selenium peroxidase-mimicking enzymes

The technology of black selenium peroxide and conductive polymer is applied in the field of nano-black selenium peroxide simulating enzyme catalyzed synthesis of water-soluble conductive polymer, which can solve the problems of difficult purification, large environmental pollution, easy inactivation of natural enzymes, etc. Achieve the effect of green synthesis process, overcome insoluble and infusible, and good application prospects

Active Publication Date: 2016-07-13
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0011] Aiming at the problems that natural enzymes are easy to inactivate, difficult to purify, high in price, and the preparation process of conductive polymers causes great environmental pollution and poor water solubility of the product, the present invention provides a nanometer black selenium superconductor that is not easily inactivated, easy to purify, and low in price. A method for preparing an oxide-mimicking enzyme, and using the mimetic enzyme as a catalyst, a green synthesis process of a water-soluble conductive polymer has been developed. The process has mild reaction conditions, is green and pollution-free, and the prepared conductive polymer has excellent water solubility

Method used

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  • A method for the synthesis of water-soluble conductive polymers catalyzed by nanometer black selenium peroxidase-mimicking enzymes
  • A method for the synthesis of water-soluble conductive polymers catalyzed by nanometer black selenium peroxidase-mimicking enzymes
  • A method for the synthesis of water-soluble conductive polymers catalyzed by nanometer black selenium peroxidase-mimicking enzymes

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Experimental program
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Effect test

Embodiment 1

[0036] 1. Preparation of nanometer black selenium peroxide mimetic enzyme:

[0037] step:

[0038] Accurately weigh 0.222g selenium dioxide (SeO 2 ), dissolved in 5 mL of deionized water at room temperature, added 0.8 mL of concentrated sulfuric acid with a mass concentration of 98%, stirred for 5 minutes, added 30 mL of glycerol, continued to stir for 30 minutes, transferred the mixture to an autoclave, and reacted at 180 ° C After 6 hours, the product was centrifuged, and the centrifuged precipitate was washed three times with deionized water and ethanol respectively, and then vacuum-dried at 60° C. to obtain nano black selenium powder.

[0039] result:

[0040] attached by figure 1 It can be seen that the prepared product is simple selenium with high purity.

[0041] attached by figure 2 It can be seen that the prepared black selenium is a spherical particle with a size between 500 nm and 10 μm.

[0042] 2. Test of the simulated activity of nano black selenium peroxi...

Embodiment 2

[0069] Synthesis of water-soluble conductive polyaniline PANI catalyzed by nano-black selenium peroxide mimetic enzyme:

[0070] step:

[0071] ① Accurately weigh 1 mmol (0.093 g) of aniline monomer and 1 mmol (0.206 g) of sodium polystyrene sulfonate, add to 20 ml of citric acid-disodium hydrogen phosphate buffer solution with pH=2.2, and stir for 2 hours under ice bath .

[0072] ② Add 5 mg of nano black selenium peroxide mimetic enzyme, and react in a water bath at 40°C, so that aniline monomers can be polymerized under the catalysis of nano black selenium.

[0073] ③ The polymerization reaction was completed after 12 hours, and the reaction system was centrifuged at a speed of 3000 rpm for 10 minutes to remove the nano black selenium catalyst.

[0074] ④ Transfer the upper layer centrifugate into a dialysis bag with a molecular weight cut-off of 3500KDa, and dialyze in a hydrochloric acid solution with pH=5 for 24 hours to remove unreacted monomers and oligomers with sma...

Embodiment 3

[0076] Synthesis of water-soluble conductive polyaniline PANI catalyzed by nano-black selenium peroxide mimetic enzyme:

[0077] step:

[0078] ① Accurately weigh 2 mmol (0.186 g) of aniline monomer and 2 mmol (0.512 g) of sodium polystyrene sulfonate, add to 20 ml of citric acid-disodium hydrogen phosphate buffer solution with pH=3.2, and stir for 3 hours under ice bath .

[0079] ② Add 10 mg of nano black selenium peroxide mimetic enzyme, and react in a water bath at 60°C, so that aniline monomers can be polymerized under the catalysis of nano black selenium.

[0080] ③After the polymerization reaction was completed for 24 hours, the reaction system was centrifuged at a speed of 3000 rpm for 10 minutes to remove the nano black selenium catalyst.

[0081] ④ Transfer the upper layer centrifugate into a dialysis bag with a molecular weight cut-off of 3500KDa, and dialyze in a hydrochloric acid solution with pH=5 for 24 hours to remove unreacted monomers and oligomers with sma...

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Abstract

The invention relates to a method for synthesizing a water-soluble conductive polymer by using a nano black selenium peroxide mimic enzyme as a catalyst, belonging to the technical field of preparation and application of nano materials. The nano black selenium peroxide mimic enzyme is nano black simple substance selenium prepared from selenium dioxide under solvothermal conditions by using concentrated sulfuric acid as a reducer. The substance has similar catalytic activity to peroxidase, and can be used for catalyzing synthesis of the water-soluble conductive high-molecular polymer. According to the synthesis method, a polymer monomer is used as a raw material, the nano black selenium is used as the catalyst, water is used as a reaction medium, and ambient oxygen is used as an oxidizer to obtain the water-soluble conductive polymer in a buffer solution with the pH value of 2.2-4.2. The method has the advantages of green synthesis technique and no pollution, and overcomes the defects in the traditional chemical process which needs non-environment-friendly persulfate oxidizers and organic solvents.

Description

technical field [0001] The invention relates to a method for synthesizing a water-soluble conductive polymer catalyzed by a nanometer black selenium peroxide imitating enzyme, and belongs to the technical field of nanomaterial preparation and application thereof. Background technique [0002] With the enhancement of human environmental protection awareness and the concept of social sustainable development, enzyme-catalyzed technology, as a green synthetic technology, has become a hot research and application hotspot in the field of chemical industry. As the core of industrial biotechnology, enzyme catalysis technology is known as the most promising technology for industrial sustainable development. Biocatalysis and biotransformation technologies will be a strong guarantee for my country's biochemical industry to realize changes in production methods, product structure adjustments, and clean and efficient manufacturing. In recent years, with the rise of green chemistry, enzy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08G73/06C08G61/12
Inventor 王玮李雷雷陈克正
Owner QINGDAO UNIV OF SCI & TECH
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