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Production and use of novel polyanilines for treating water

A technology of polyaniline and water treatment, applied in water/sewage treatment, water/sludge/sewage treatment, gas treatment, etc., which can solve problems such as uneven coating, cracks, and flaky coating

Inactive Publication Date: 2010-12-08
南方化学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Further problems arise with the coating of the membrane
These coatings often exhibit inhomogeneity which can lead to flaking or cracking of the coating

Method used

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  • Production and use of novel polyanilines for treating water
  • Production and use of novel polyanilines for treating water
  • Production and use of novel polyanilines for treating water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] The synthesis of embodiment 1-polyaniline dodecanethiol:

[0108] (poly(p-phenylene-amine-imine)-p-dodecanethiol)

[0109] Thiol derivatives of polyaniline were prepared in an oxidative, acid-catalyzed precipitation polymerization in aqueous solution. Aniline is polymerized with dodecanethiol (DCT). As the thiol radicals attach to the polyaniline groups, the polymerization chain reaction is correspondingly interrupted.

[0110]

[0111] Scheme 2: Reaction scheme for the oxidative polymerization of aniline and DCT; n = ~5 to 50, depending on the choice of reaction conditions.

[0112] The chemicals required for the synthesis are listed in Table 1 below.

[0113]

[0114]

[0115] Table 1: Substances used for polyaniline synthesis

[0116] Synthetic description:

[0117] 1) 3ml (33mmol) of aniline and 0.35ml (1.5mmol) of dodecanethiol were successively placed in a glass beaker. Mix the mixture thoroughly.

[0118] 2) Put 34g (179mmol) p-TSA of p-toluenes...

Embodiment 2

[0146] Example 2 - Dispersion of polyaniline:

[0147] The starting material for the dispersion is a powder of polyaniline in the form of a non-conducting base (EB).

[0148] 1) Preparation of 2.5-% (w / v) PAni-EB-NMP stock dispersion

[0149] 2.8 g of powdered polyaniline in base form (EB) was pulverized by mortar and mortar for about 5 minutes. Add 5ml of 2-propanol to the powder. The mixture was homogenized in a mortar and pestle for approximately 5 minutes. The slurry was then transferred to a beaker containing 100 ml of N-methyl-2-pyrrolidone (NMP). The mixture was then dispersed with a homogenizer at 10000 rpm. The dispersion was then heated to 50°C and stirred on a magnetic stirrer for several hours. To remove any agglomerates present, the dispersion thus treated is filtered through a cellulose filter.

[0150] The dispersion prepared in the first step is hereinafter referred to as PAni-EB-NMP 2.5% (w / v) stock dispersion.

[0151] 2) Preparation of 2-% (w / v) PAn...

Embodiment 3-

[0156] Embodiment 3-preparation embodiment, the coating of steel plate:

[0157] Material:

[0158] ES Dispersion 1% (w / v)

[0159] steel foil

[0160] Doctor coater

[0161] scraper (doctor knife)

[0162] The purified and defatted foil sections are placed on a flat support surface over which the spatula can be pulled. The doctor blade has a width (internal) of 73 mm, which determines the width of the coating on the steel plate. The gap width between the substrate and the spatula was 50 μm. Place the spatula behind the slide on the substrate. 1 ml of the 1% (w / v) dispersion was placed inside the blade of the spatula. The doctor blade is then drawn on the steel foil at a constant pulling speed of 20 mm / s, leaving a thin film of the coating dispersion on the substrate. The solvent was evaporated with a hot air blower at 200°C (on a desiccator). After evaporation of the solvent, the remaining solvent residue was evaporated at 120 °C in a vacuum drying cabinet. A gree...

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Abstract

The invention relates to a polyaniline comprising aniline units and organosulphur units, characterised in that the polyaniline is doped and has a number average degree of polymerisation of between 5 and approximately 50. The invention also relates to a method for producing polyaniline, wherein aniline and at least one organosulphur unit are converted in an oxidative, acid catalysed polymerisation reaction to form a polyaniline derivative. The invention further relates to a coated substrate that is coated with the polyaniline according to the invention and to a method for coating said substrate. In addition, the invention relates to a coating composition that is suitable for coating the substrate and to a method for producing said coating composition. The invention also relates to the use of doped polyaniline that contains sulphur in the main polymer chain for treating water and / or for purifying air and to a purifying reactor for carrying out said purification method.

Description

technical field [0001] The invention relates to polyaniline derivatives with organic sulfur units and the use of polyaniline derivatives in water quality treatment, air purification, preparation of redox flow batteries or electrolysis. The present invention also relates to methods of preparing novel polyaniline derivatives and substrates coated with polyaniline derivatives. Background technique [0002] In water treatment, oxidation processes are often used for the reduction of toxic substances and for disinfection. In many cases, wet chemical methods involving the addition of chemicals lead to an unwanted increase in the salinity of the water and require activation with ultraviolet radiation or electrochemical steps. [0003] These so-called "advanced oxidation processes" generate OH radicals, which then have an oxidizing effect on impurities. For example, polyaniline generates active oxygen species (species), such as, for example, OH radicals, superoxide radical anions, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/00C08G73/02C02F1/00C08G71/02
CPCC02F1/46109C08G73/0266C09J179/02C09D179/02C02F2001/46138H01M8/20H01M2300/0082A61L9/16Y02E60/528B01D2257/91B01D69/10A61L9/01B01D71/60Y10T428/1352Y10T442/20Y10T442/10Y02E60/50Y02P70/50
Inventor K-H·佩丁格F-X·米勒G·伊林M·乌布利希
Owner 南方化学股份有限公司
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