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Preparation method of polyaniline/montmorillonite composite adsorbent with sheet structure

A sheet-like structure, montmorillonite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of easy agglomeration, difficult recovery, low adsorption efficiency, etc., to achieve controllable conditions, The effect of simple preparation process and simple synthesis method

Inactive Publication Date: 2013-01-23
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that polyaniline is easy to reunite as an adsorption material, difficult to recycle, and low adsorption efficiency, the present invention provides a method for preparing a polyaniline / montmorillonite composite adsorbent with a sheet structure. The polyaniline / montmorillonite composite adsorbent with sheet-like structure, through the polymer acid with doping function on the surface of montmorillonite, utilizes the unique two-dimensional nanostructure and huge specific surface area of ​​montmorillonite , the polyaniline and montmorillonite are organically combined to form a composite material with a sheet structure by in-situ chemical oxidation polymerization method, and the polyaniline / montmorillonite composite adsorbent is used to adsorb heavy metal ions and anionic dyes in wastewater

Method used

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  • Preparation method of polyaniline/montmorillonite composite adsorbent with sheet structure
  • Preparation method of polyaniline/montmorillonite composite adsorbent with sheet structure
  • Preparation method of polyaniline/montmorillonite composite adsorbent with sheet structure

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Embodiment 1

[0032] First, disperse 1.0g of sodium montmorillonite in 50mL of water, adjust the pH of the solution to 3 by adding hydrochloric acid dropwise, add 0.5g of polymerizable polyhydroxy tertiary amine modifier, stir for 6 hours, filter and wash with water until there is no chloride ion Obtain organically modified montmorillonite; disperse the organically modified montmorillonite in 50 mL of water, add 1.0 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.008 g of ammonium persulfate, react at 70 ° C for 4 h, and The product was filtered and washed with water to obtain polymeric acid-modified montmorillonite; the polymeric acid-modified montmorillonite was dispersed in 800mL of 0.5mol / L hydrochloric acid aqueous solution, 10g of aniline monomer was added, and after stirring and mixing for 30min, the dissolved 24.5 g of ammonium persulfate in 0.5 mol / L hydrochloric acid aqueous solution was slowly added dropwise, polymerized at room temperature for 24 hours, collected the product...

Embodiment 2

[0036]First, disperse 2.5g of sodium montmorillonite in 100mL of water, adjust the pH of the solution to 3 by adding hydrochloric acid dropwise, add 1.5g of polymerizable polyhydroxy tertiary amine modifier, stir for 6 hours, filter and wash with water until there is no chloride ion Obtain organically modified montmorillonite; disperse organically modified montmorillonite in 100mL water, add 2.5g 2-acrylamide-2-methylpropanesulfonic acid and 0.025g ammonium persulfate, react at 70°C for 4h, and The product was filtered and washed with water to obtain polymeric acid-modified montmorillonite; the polymeric acid-modified montmorillonite was dispersed in 800mL of 0.5mol / L hydrochloric acid aqueous solution, 10g of aniline monomer was added, and after stirring and mixing for 30min, the dissolved 24.5 g of ammonium persulfate in 0.5 mol / L hydrochloric acid aqueous solution was slowly added dropwise, polymerized at room temperature for 24 hours, collected the product, and washed the p...

Embodiment 3

[0040] First, disperse 5.0g of sodium montmorillonite in 150mL of water, adjust the pH of the solution to 2 by adding hydrochloric acid dropwise, add 2.5g of polymerizable polyhydroxy tertiary amine modifier, stir for 6 hours, filter and wash with water until there is no chloride ion Obtain organically modified montmorillonite; disperse the organically modified montmorillonite in 150 mL of water, add 5.0 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.03 g of ammonium persulfate, react at 70 ° C for 4 h, and The product was filtered and washed with water to obtain polymeric acid-modified montmorillonite; the polymeric acid-modified montmorillonite was dispersed in 800mL of 0.5mol / L hydrochloric acid aqueous solution, 10g of aniline monomer was added, and after stirring and mixing for 30min, the dissolved 24.5 g of ammonium persulfate in 0.5 mol / L hydrochloric acid aqueous solution was slowly added dropwise, polymerized at room temperature for 24 hours, collected the produc...

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Abstract

The invention provides a preparation method of polyaniline / montmorillonite composite adsorbent with a sheet structure, which belongs to the technical field of preparation of polymeric nanocomposites. According to the preparation method, polymer acid with a doping function is adopted for modifying the surface of montmorillonite, the characteristics of unique two-dimensional structure and huge specific surface area of the montmorillonite are utilized, and an in-situ chemical oxidative polymerization method is adopted to organically combine polyaniline with the montmorillonite, thus obtaining the composite material with the sheet structure. The preparation method provided by the invention is simple in preparation technology and controllable in condition; and the prepared polyaniline / montmorillonite composite material is low in cost, has the characteristics of high adsorption and environment friendliness, is capable of markedly improving the adsorption efficiency and the adsorption capacity of the polyaniline to organic anionic dye and heavy metal ions, and is suitable for the fields of industrial wastewater treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer nanocomposite preparation, and in particular relates to a method for preparing a polyaniline / montmorillonite composite adsorbent with a sheet structure. Background technique [0002] With the development of modern industry and agriculture, a large number of toxic and harmful substances in people's production and life enter the water body, and the water environment on which human beings rely for survival and development has been seriously damaged. Due to the relative lack of water resources in our country, wastewater treatment technology plays an increasingly important role in production and life. [0003] Organic dye wastewater has the characteristics of high concentration, deep color, large fluctuations in water quality, and poor biochemical properties. It is a type of industrial wastewater that is difficult to treat. Among the organic dyes, anionic dyes include acidic, direct, reactive and othe...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26C02F1/28
Inventor 陈均洪小琴张千峰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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