Preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles

A technology of acrylate and particle surface, which is applied in the field of preparation of chemically modified styrene-acrylic latex on the surface of conductive polyaniline, which can solve the problems affecting the anti-corrosion, conductivity and anti-fouling performance of polyaniline, and achieve excellent interface adhesion and excellent performance Effect

Active Publication Date: 2013-07-10
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the doped polyaniline can easily control the particle size in the nanometer range, due to the nano surface effect polyaniline will inevitably form aggregation in the matrix, which will affect the anti-corrosion, electrical conductivity and anti-fouling properties of polyaniline

Method used

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  • Preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles
  • Preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles
  • Preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 50 grams of phosphoric acid-containing functional styrene-acrylic latex prepared by the above process, add 0.15 grams of aniline, stir with a mechanical stirrer for 20 minutes, and evenly add dropwise an aqueous solution containing 0.4 grams of ammonium persulfate for 2 hours at an ambient temperature of 10°C.

[0035] After the dropwise addition, the ice-bath stirring was continued for 20 h to obtain a suspension dispersion of polyaniline (polyaniline accounted for 0.5% by weight of the copolymer) bound to the surface of the styrene-acrylate copolymer latex particles.

[0036] The scanning electron microscope picture of the styrene-acrylic acid ester copolymer latex particle containing phosphoric acid functional group prepared by this process is as follows figure 1 As shown, the polymer presents a regular spherical shape with a particle size of 100±15 nm.

[0037] Such as figure 2 As shown in the scanning electron microscope picture of polyaniline bonded to the...

Embodiment 2

[0039] Weigh 50 grams of phosphoric acid-containing functional styrene-acrylic latex prepared by the above process, add 0.3 grams of aniline, stir with a mechanical stirrer for 20 minutes, and evenly drop an aqueous solution containing 0.8 grams of ammonium persulfate for 3 hours at an ambient temperature of 0°C.

[0040] After the dropwise addition, the ice-bath stirring was continued for 15 hours to obtain a suspension dispersion of polyaniline (polyaniline accounted for 1% by weight of the copolymer) bound to the surface of the styrene-acrylate copolymer latex particles.

[0041] The aqueous solution of the oxidant ammonium persulfate added dropwise can adopt potassium persulfate, H 2 o 2 、KIO 3any of the alternatives.

[0042] image 3 Compared the DSC of styrene-acrylate copolymer latex films containing phosphoric acid functional groups and polyaniline with different contents bound to the surface of styrene-acrylate copolymer latex particles, the results showed tha...

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Abstract

The invention discloses a preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles, relating to the field of preparation of styrene-acrylate emulsion which is chemically modified on the surface of conductive polyaniline. The styrene-acrylate emulsion containing a phosphoric acid functional group is firstly prepared by adopting a miniemulsion polymerization method, and then a suspension and dispersion solution which bonds the polyaniline on the surfaces of the styrene-acrylate copolymer emulsion particles is prepared by aniline in-situ oxidation polymerization. The functional emulsion obtained by the method disclosed by the invention has the following advantages: the polyaniline is dispersed in the styrene-acrylate copolymer emulsion in a molecular size; and excellent interface bonding force exists between the polyaniline and a matrix of a styrene-acrylate copolymer due to electrostatic interaction.

Description

technical field [0001] The invention relates to the field of preparation of conductive polyaniline surface chemically modified styrene-acrylic latex, in particular to a method for preparing polyaniline bonded to the surface of styrene-acrylate copolymer latex particles. Background technique [0002] Polyaniline is a polymer compound with wide application. Due to its good electrical conductivity, electrochemical activity, environmental protection, simple preparation process, and cheap raw materials, it is widely used in the fields of antistatic coatings and antifouling and anticorrosion coatings. with broadly application foreground. [0003] The main synthesis methods of polyaniline are: chemical oxidation polymerization, condensation polymerization and electrochemical polymerization, which belongs to the conjugated conductive polymer, insoluble and infusible. In order to improve its water solubility, it can be realized by introducing a substituent on the benzene ring or dop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/07C08L25/14C08L79/02C08G73/02C08F212/08C08F220/18C08F230/02
Inventor 朱爱萍杨芳芳
Owner YANGZHOU UNIV
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