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Novel polyaniline/modified acrylic fiber adsorbent and preparation method thereof

A technology for modifying acrylic fibers and polyaniline, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve problems such as easy loss, lack of active groups, and uneven distribution of polyaniline, and achieve easy The effect of simple separation and preparation process and excellent mechanical properties

Active Publication Date: 2015-04-15
HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method at present is: due to the lack of active groups in the matrix material, the polyaniline is simply deposited on the fiber or bonded to the fiber through weak van der Waals force, resulting in uneven distribution of polyaniline on the fiber and easy loss , and further affects its application
However, there is no report on the preparation of polyaniline / modified acrylic fiber composites with uniform distribution and stable performance by ultrasonic-assisted in-situ polymerization using modified acrylic fiber as the matrix.

Method used

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  • Novel polyaniline/modified acrylic fiber adsorbent and preparation method thereof
  • Novel polyaniline/modified acrylic fiber adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Ambient temperature (20-25 oC), immerse 0.5 g of carboxylic acid-modified acrylic fibers (prepared by the method described in the literature "Preparation and Properties of Carboxylic Ion Exchange Fibers") in 50 mL of aniline (0.465 g, that is, 0.005 mol), hydrochloric acid (0.05 mol) mixed aqueous solution, after ultrasonic treatment for 30 minutes (100 KHz, 200 W), add ammonium persulfate oxidant (1.141 g, namely 0.005 mol), ultrasonic reaction for 1 hour (100 KHz, 200 W), and stand overnight After the reaction, the fiber is taken out and washed repeatedly with water and dried to obtain polyaniline / modified acrylic fiber. The fiber weight gain rate was 4.2 wt%.

Embodiment 2

[0026] 0-5 o Under C, 0.5 g of carboxylic acid-modified acrylic fiber (prepared by the method described in the literature "Preparation and properties of carboxylic acid-type ion exchange fiber") was immersed in 100 mL of aniline (1.863 g, that is, 0.02 mol), cattle In the mixed aqueous solution of sulfonic acid (0.02 mol), after ultrasonic treatment for 30 minutes (50 KHz, 100 W), ammonium persulfate oxidant (4.564 g, namely 0.02 mol) was added, and the ultrasonic reaction was performed for 1 hour (50 KHz, 100 W). After the reaction, take out the fiber and wash it repeatedly with water and dry it to obtain polyaniline / modified acrylic fiber. The fiber weight gain rate was 8.6 wt%.

Embodiment 3

[0028] 35±1 o At a temperature of C, 0.5 g of carboxylic acid-modified acrylic fibers (prepared by the method described in the literature "Preparation and properties of carboxylic acid-type ion exchange fibers") were immersed in 25 mL of aniline (0.047 g, ie 0.0005 mol) aqueous solution In the process, after ultrasonic treatment for 30 minutes (50 KHz, 50 W), ammonium persulfate oxidant (0.171 g, or 0.00075 mol) was added, ultrasonically reacted for 1 hour (50 KHz, 50 W), and stood overnight. After the reaction, the fiber was taken out Repeatedly washing with water and drying to obtain polyaniline / modified acrylic fiber. The fiber weight gain rate was 5.8 wt%.

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Abstract

The invention discloses a novel polyaniline / modified acrylic fiber adsorbent and a preparation method thereof, and belongs to the technical field of polymers. The novel polyaniline / modified acrylic fiber adsorbent is synthesized by an ultrasonic-assisted in-situ chemical oxidation polymerization method. Modified acrylic fibers are used as base materials. Polyaniline as an active component is uniformly loaded on the modified acrylic fibers as base materials, wherein the polyaniline content is in a range of 1-10wt%. The carboxylic acid group or sulfonic acid group-modified acrylic fibers are used as base materials and ultrasonic treatment is used in preparation so that action between polyaniline and the base materials are improved and uniform and stable loading of polyaniline on the modified acrylic fibers is realized. The preparation method has simple processes, easily controllable conditions and a low cost. The novel polyaniline / modified acrylic fiber adsorbent has excellent adsorption performances of polyaniline and excellent mechanical performances of acrylic fibers, has excellent effects of adsorbing pollutants such as heavy metals and polarity dye in water, and has a good application prospect in the water pollution treatment field.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a novel polyaniline / modified acrylic fiber adsorbent and a preparation method thereof. Background technique [0002] Due to its good electrical conductivity, environmental stability, low cost and simple preparation methods, polyaniline has become widely used in metal anticorrosion, conductive fibers, electromagnetic shielding materials, sensors, controlled drug release, analysis and detection, and environmental pollution control. new green environmental protection materials. Among them, environmental pollution control, especially the treatment of heavy metal pollutants and polar organic pollutants in water, is one of the hot areas of polyaniline application research in recent years. The removal of pollutants by polyaniline is mainly based on its special oxidation / reduction characteristics, doping / dedoping characteristics, and a large number of nitrogen-containing groups ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28D06M15/61D06M101/28
Inventor 王静赵亮张卡卡曹继红
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD