Method for preparing high-molecular-weight conducting polyaniline material

A conductive polyaniline and high molecular weight technology is applied in the field of preparation of high molecular weight intrinsic state conductive polymer materials, which can solve the problems of insoluble in common organic solvents, cumbersome post-processing process, complex synthesis conditions and the like, and achieve post-processing technology. Simple, easy-to-control synthesis conditions, and high solubility

Inactive Publication Date: 2011-09-07
SICHUAN AGRI UNIV
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Problems solved by technology

These methods have the disadvantages of complicated and difficult to control synthesis conditions, cumbersome post-treatment processes such as separation and purification, small molecular weight of products, wide molecular distribution, simple structure and insoluble in common organic solvents, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Fe 3 o 4 Synthesis of Magnetic Nanoparticles (MNPs)

[0018] First, in a 63°C water bath, N 2 Add the mixed solution of iron salt into the strong alkali solution under the atmosphere, and keep stirring for 1 hour to obtain Fe with a particle size of 10nm. 3 o 4 magnetic nanoparticles. Among them: iron salt mixed solution is FeSO 4 with FeCl 3 The mixed solution of the substance is 0.5-1; the strong alkali solution is NaOH. The reaction was continuously stirred, cooled to room temperature after the reaction was completed, washed several times with ultrapure water at room temperature, and then washed several times with absolute ethanol until the Fe3O4 magnetic nanoparticle solution was neutral, and its concentration was adjusted.

[0019] (2) Preparation of soluble conductive polyaniline

[0020] Mix p-phenylenediamine with 1,4-dioxane-acetic acid / sodium acetate buffer organic miscible system, and 2 Atmosphere, stir in a water bath at 40°C until completely di...

Embodiment 2

[0022] (1) In 63℃ water bath, N 2 FeSO 4 ·6H 2 O (0.5M 20mL) and FeCl 3 ·7H 2 O (0.5M 30mL) solution was mixed and added to 4M NaOH solution, and stirred continuously for 1h. (2) After the reaction is finished, cool to room temperature, and use ultrapure water (dd H 2 O) Wash repeatedly 5 to 7 times, and then wash 2 to 3 times with absolute ethanol until Fe 3 o 4 MNPs solution becomes neutral, adjust its concentration to 0.01g / mL. (3) Weigh 1.08g (about 0.01mol) of p-phenylenediamine in a reaction vessel, add 15% (V / V) 1,4-dioxane-acetic acid / sodium acetate buffer solution (pH 3.6) to dissolve organically System 40mL, in 40℃ water bath, N 2 atmosphere and dissolve it completely under constant stirring, then add 4 mg Fe 3 o 4 MNPs, final concentration 2% HO 2 o 2 (Slowly dropwise within 2h), continue to react for 12h. The polymerized product is gradually precipitated from the reaction solution, and the reaction solution is suction filtered to collect the product....

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Abstract

The invention discloses a novel method for synthesizing high-molecular-weight conducting polyaniline, which comprises the following steps of: mixing p-phenylenediamine with an organic mutually-soluble system of a 1,4-dioxane-acetic acid / sodium acetate buffer solution and stirring at N2 atmosphere and the water bath of 40 DEG C till the mixture is completely dissolved; slowly adding Fe3O4 magneticnano particles and an initiator hydrogen peroxide solution, then continuously reacting for 12 hours; after a polymerized product precipitates, filtering, washing, reprecipitating, removing Fe3O4 magnetic nano particles by utilizing a strong magnet and filtering a suspension; dissolving sediments into DMF (Dimethyl Formamide); slowly dropwise adding into anhydrous ethanol so that a polymer is precipitated; and filtering and drying the sediments in vacuum to obtain the high-molecular-weight eigenstate black product conducting polyaniline. The method has the advantages of simple synthesis conditions, easiness in control and simple and convenient postprocessing processes, such as separation, purification, and the like; the magnetic nano particles are easy for magnetic separation; and the eigenstate conducting polyaniline has superhigh molecular weight, is easy to dissolve in a common organic solvent and has the characteristics of favorable oxidoreduction reversibility and heat stability.

Description

technical field [0001] The invention relates to a preparation method of a high molecular weight eigenstate conductive polymer material. More specifically, it relates to a preparation method of a high molecular weight conductive polyaniline material. Background technique [0002] Polyaniline is a kind of conductive polymer conjugated polymer with long π-electron conjugated main chain, which has good electrochemical properties, conductivity, stability and Coulomb effect, etc. It is widely used in the fields of electrochemistry, materials science and biology. be widely used. Its molecular design and polymerization method are hot spots in polymer chemistry research. [0003] The traditional synthesis methods of polyaniline include chemical polymerization, electrochemical polymerization, template synthesis and so on. These methods have the disadvantages of complicated and difficult to control synthesis conditions, cumbersome post-treatment processes such as separation and puri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02
Inventor 吴琦单志成东林王显祥陈惠虎萌赵海霞
Owner SICHUAN AGRI UNIV
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