Redox active polyhydroquinone microspheres and preparation method thereof

A polyhydroquinone and microsphere technology, applied in the field of functional materials, can solve the problems of unstable product performance, difficult processing, insoluble and infusible, etc.

Active Publication Date: 2015-12-09
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PHQ obtained by the general chemical oxidation polymerization method is an amorphous powder, and there are also problems such as insoluble and infusible, difficult to process or unstable product performance.

Method used

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  • Redox active polyhydroquinone microspheres and preparation method thereof
  • Redox active polyhydroquinone microspheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 1.65g of hydroquinone, 15.0mL of 4.4% PEG1000 aqueous solution and 125.6mL of water into the reaction flask, mix well and add 6.0mL of 0.02% ferrous sulfate aqueous solution and 3.4mL of hydrogen peroxide; After reacting for 24 hours, a black polymer microsphere dispersion was obtained, and the microspheres were separated by centrifugation, and dried in vacuum at 50° C. for 24 hours. The obtained polyhydroquinone microspheres had a particle diameter of 1020 nm. Taking silver / silver chloride as a reference electrode, the reduction peak potential of the microsphere dimethyl sulfoxide dispersion casting film is 0.12 volts, and the oxidation peak potential is 0.34 volts.

Embodiment 2

[0019] Add 1.65g of hydroquinone, 15.0mL of 4.4% PEG1000 aqueous solution and 128.6mL of water into the reaction flask, mix well and add 3.0mL of 0.02% ferrous sulfate aqueous solution and 3.4mL of hydrogen peroxide; After reacting for 24 hours, a black polymer microsphere dispersion was obtained, and the microspheres were separated by centrifugation, and dried in vacuum at 50° C. for 24 hours. The obtained polyhydroquinone microspheres had a particle diameter of 860 nm. Taking silver / silver chloride as a reference electrode, the reduction peak potential of the microsphere dimethyl sulfoxide dispersion casting film is 0.21 volts, and the oxidation peak potential is 0.57 volts.

Embodiment 3

[0021] Add 1.65g of hydroquinone, 30.0mL of 4.4% PEG1000 aqueous solution and 110.6mL of water into the reaction flask, mix well and add 6.0mL of 0.02% ferrous sulfate aqueous solution and 3.4mL of hydrogen peroxide; After reacting for 24 hours, a black polymer microsphere dispersion was obtained, and the microspheres were separated by centrifugation, and dried in vacuum at 50° C. for 24 hours. The obtained polyhydroquinone microspheres had a particle diameter of 680 nm. Taking silver / silver chloride as a reference electrode, the reduction peak potential of the microsphere dimethyl sulfoxide dispersion casting film is 0.10 volts, and the oxidation peak potential is 0.32 volts.

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Abstract

The invention relates to a polymer microsphere with redox activity, which is a polyhydroquinone microsphere with the size of 0.3-5mum. The polyhydroquinone microsphere is prepared in such a way of introducing a macromolecular template which is polyethylene glycol or polyvinyl alcohol to the chemical oxidative polymerization system of hydroquinone or benzoquinone, carrying out centrifugal separation on polymerized suspension liquid, washing and drying. The dried polyhydroquinone microsphere can be dispersed in water once again, and with silver / silver chloride as a reference electrode, a microsphere dispersion cast film has the reduction peak potential of 0.04-0.26V and the oxidation peak potential of 0.30-0.60 V. The method can be used to prepare the polyhydroquinone microsphere at 10-90 DEG C, adopts a simple device, is convenient to operate, has low cost and good repeatability and is suitable for preparing the polyhydroquinone microsphere with redox activity on a large scale. The prepared polyhydroquinone microsphere has wide application prospects in the fields of anti-oxidants, anti-corrosion coatings, bio-sensors and fuel cells and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a redox active polyhydroquinone microsphere with a controllable particle size and a preparation method capable of large-scale production. Background technique [0002] Redox polymers are polymers with redox active centers, and the active functional groups can be ferrocene, coordination metal ions, viologen, quinone, phenol, fullvalene, tetracyano-p-dimethylbenzophenone and organic dyes etc. The main chain redox polymer is generally a conjugated polymer, which has special optical, electrical, and magnetic properties due to the existence of highly delocalized Π bonds. It is used in biofuel cells, sensors, electromagnetic shielding materials, and anti-corrosion coatings. The field has great application prospects. Polyhydroquinone (PHQ) is a kind of redox polymer whose main chain is completely composed of quinone and hydroquinone. It maintains the properties of quinone a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/44C08G65/00
Inventor 关英张爱娟张拥军
Owner NANKAI UNIV
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