Aqueous conducting anti-corrosive paint containing nano core-shell structure polypyrrole

Abstract

The invention discloses an aqueous conducting anti-corrosive paint containing nano core-shell structure polypyrrole, which comprises nano core-shell structure polypyrrole compound particles and aqueous resin emulsion, wherein the nano core-shell structure polypyrrole accounts for 5.5-25 wt% of aqueous resin emulsion. When in use, the aqueous conducting anti-corrosive paint containing nano core-shell structure polypyrrole is applied or sprayed on the metal surface which is processed by oil removal and anti-corrosive treatment, the coating thickness is controlled at 20-200 mu m, and the coatingis cured at room temperature. The nano core-shell polypyrrole compound particles are synthesized by using a micro emulsion method. The method has the advantages of simple experimental apparatus, low energy consumption and easy operation; and the prepared nano particles have uniform and controllable particle size. Compared with the common paint, the aqueous conducting anti-corrosive paint has incomparable advantages and high application value, and is beneficial to market popularization.

Description

technical field [0001] The invention relates to a water-based conductive anticorrosion coating containing polypyrrole with a nano core-shell structure. Background technique [0002] In 1977, Heeger, MacDiarmid and Shirakawa Hideki found that the polyacetylene film doped with arsenic pentafluoride or iodine has metal conductivity, and the conductivity reaches 103S cm -1 , this discovery breaks the traditional concept that polymers are usually insulators, and raises a series of interesting basic scientific questions about the structure and properties of conducting polymers. Coupled with the broad application prospects of conductive polymers in electrode materials for chemical power sources, modified electrodes and enzyme electrodes, electrochromic displays, and electrostatic shielding, it has stimulated a worldwide research boom on conductive polymers. In 1979, IBM Corporation of the United States used electrochemical oxidation polymerization to prepare a material with a cond...

AI Technical Summary

Problems solved by technology

[0005] However, the conductive polypyrrole prepared according to the traditional method is generally a black powder, which makes it difficult to color the coating with polypyrrole as the conductive filler.

In addition, due to the large conjugated π bond in the linear molecular chain, polypyrrole has extremely strong rigidity, polypyrrole can neither melt nor dissolve, which makes it difficult to process and shape, and its mechanical properties are also very poor. If it is made into water-based paint, it will be very unstable and prone to precipitation

[0006] In summary, there are many deficiencies in the prior art, and the preparation of a water-based conductive anti-corrosion coating with high polypyrrole content, good chemical compatibility and high conductivity has become an urgent problem to be solved.

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