Method for preparing conducting polymer aqueous dispersion by conducting polymer solid

Abstract

A method for preparing a conducting polymer aqueous dispersion by a conducting polymer solid particularly adopts a process flow which orderly comprises high speed shearing dispersing treatment, high pressure homogenization treatment, and high speed emulsification dispersing treatment of conducting polymer powder. The invention applies a physical dispersion method of solid particles to the preparation of nanometer conducting polymer aqueous dispersion, solves the processing problem due to the general insolubility and infusibility of conducting polymer, overcomes the requirements for processing performance such as solubility and the like of conducting polymer by industrial production, and overcomes the defects of current conducting polymer solvent dispersion systems in transport, storage, and processing processes. The method has a simple method, simple equipment operations, low requirements for production workshop conditions, a short production period, less manpower consumption , and greatly reduced cost. Also since the preparation means of the conducting polymer solid is not limited, chemical oxidation polymerization, solid state polymerization, coupling polymerization and the like can be used.

Description

technical field [0001] The invention belongs to the field of conductive polymer materials, in particular to a method for preparing a conductive polymer water dispersion from a conductive polymer solid. Background technique [0002] Conductive polymer is a kind of polymer compound with conjugated π bond structure. After chemical or electrochemical doping with anion or cation, it is a special polymer material with conductivity. The outstanding advantage of conductive polymer is that it has The photoelectric properties of metals and semiconductor materials also have the good stability and mechanical properties of polymers. At present, the methods of synthesizing conductive polymers are mainly divided into electrochemical polymerization, chemical oxidation polymerization, metal coupling polymerization, solid-state polymerization, etc. Among them, electrochemical polymerization and chemical oxidation polymerization are the two most commonly used methods. The electrochemical poly...

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Problems solved by technology

However, soluble polyaniline powder products can only be dissolved in certain organic solvents such as methyl pyrrolidone, and the characteristics of these organic solvents, such as toxicity, corrosion, volatility or high boiling point, greatly limit its storage, processing and application.

However, the preparation of polyaniline and PEDOT / PSS aqueous dispersions adopts chemical oxidation polymerization, the process is complicated, the patent and production core technology are mastered by the above two companies, and the production cost and product price are high.

Moreover, these aqueous dispersion products are inconvenient to store and transport. Long-distance transport or long-term storage will cause some defects such as precipitation, water loss, polymer molecule aggregation, particle size increase and uneven distribution, especially when other components need to be added to form a formula. The storage and transportation are more inconvenient. The addition of certain components such as organic solvents will also lead to more unstable dispersions. The addition of certain components such as binders or emulsifiers will affect the performance parameters of the product, limiting its market application prospects

[0004] The following other preparation methods of conductive polymer solvent dispersions are also reported in the patent literature, such as: Patent CN200810068915.0 reports a formula for conductive polymer electrolyte polymer solution stored stably at room temperature, but there are different boiling points in the formula Organic solvent, and the parameters of the formula must be strictly controlled to ensure that no polymerization reaction occurs during long-term storage to ensure the stability of the formula system; patent CN200880002102.X reports an organic solvent dispersion of a conductive polymer / dopant The preparation method of body, because it is only suitable for organic solvent system and the choice of solvent is limited, which limits its commercial application