Preparation of cellulose grafted acrylate copolymer and application of copolymer as adsorbent

A cellulose grafting and copolymer technology, applied in the polymer field, can solve problems such as pollution, plant straw burning, waste of resources and the environment, and achieve the effects of high decolorization rate, good selectivity and simple preparation process

Inactive Publication Date: 2013-06-19
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a considerable part of plant stalks are burne

Method used

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  • Preparation of cellulose grafted acrylate copolymer and application of copolymer as adsorbent
  • Preparation of cellulose grafted acrylate copolymer and application of copolymer as adsorbent
  • Preparation of cellulose grafted acrylate copolymer and application of copolymer as adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of Wheat Straw Cellulose Adsorbent

[0042] Add 1 g of wheat straw cellulose into 5 mL of distilled water and stir well, add 0.016 g of azobisisobutyronitrile previously dispersed in water, control the temperature at 50 °C, and then add 0.008 g of cross-linking agent N,N -Methylenebisacrylamide, stir to dissolve, and at the same time add 0.1 g of sodium acrylate with a neutralization degree of 50%, N -Vinylpyrrolidone 0.5 g, reacted at constant temperature for 2 h; when the rod climbing phenomenon occurs, the reaction is over, cooled to room temperature, and the polymer product is obtained; then the polymer product is soaked and settled in absolute ethanol for 10 min, filtered, and washed twice with distilled water. , suction filtration, vacuum drying, and grinding into powder to obtain a wheat straw cellulose copolymer adsorbent.

[0043] 2. Determination of adsorption performance

[0044] (1) Adsorption test on simulated wastewater containing methylen...

Embodiment 2

[0047] 1. Preparation of Wheat Straw Cellulose Adsorbent

[0048] Add 2 g of wheat straw cellulose into 10 mL of distilled water and stir well, add 0.05 g of initiator azobisisobutyronitrile dispersed in water in advance, control the temperature at 60 °C, and then add 0.005 g of cross-linking agent N,N -Methylenebisacrylamide, stir to dissolve, and at the same time add 1 g of sodium acrylate with 50% neutralization degree dropwise, N -Vinylpyrrolidone 2 g), reacted at a constant temperature for 3 h, until the phenomenon of climbing rods appeared, the reaction was over, cooled to room temperature, and the polymer product was obtained; then the polymer product was soaked and settled in absolute ethanol for 30 min, filtered, and repeatedly washed with distilled water for 3 time, suction filtration, vacuum drying, and grinding into powder to obtain a wheat straw cellulose copolymer adsorbent.

[0049] 2. Determination of adsorption performance

[0050] (1) Adsorption test on sim...

Embodiment 3

[0053] 1. Preparation of Wheat Straw Cellulose Adsorbent

[0054] Add 3 g of wheat straw cellulose into 20 mL of distilled water and stir well, add 0.24 g of initiator azobisisobutyronitrile dispersed in water in advance, control the temperature at 70 °C, and then add 0.06 g of cross-linking agent N,N -Methylenebisacrylamide, stir to dissolve, and at the same time add 3 g of sodium acrylate with a neutralization degree of 50%, N - 6 g of vinylpyrrolidone, reacted at constant temperature for 4 hours, until the phenomenon of climbing rods appeared, the reaction was over, cooled to room temperature to obtain a polymer product; then the polymer product was soaked and settled in absolute ethanol for 60 min, filtered, and washed with distilled water for 4 times. , suction filtration, vacuum drying, and grinding into powder to obtain a wheat straw cellulose copolymer adsorbent.

[0055] 2. Determination of adsorption performance

[0056] (1) Adsorption test on simulated wastewater ...

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Abstract

The invention discloses a preparation method of cellulose graft acrylate copolymer. The method comprises the following steps of: by utilizing water as a solvent, N, N-methylene bis-acrylamide as a cross-linking agent, azobisisobutyronitrile as an initiator, cellulose as a base body and sodium acrylate and N-vinyl pyrrolidone as comonomers, and adopting a solvent polymerization method, polymerizing so as to obtain the copolymer. The strong chelation capability of a macromolecular chelating agent and the strong adsorption capabilities of carboxyl and amido bond are utilized, so that the copolymer has the characteristics of strong adsorption capability, large adsorption capacity and high decolorization rate on heavy metal ions and organic cationic dyes in the wastewater, and can be used for absorbing and removing organic cationic dyes such as metal ions and methylene blue in the wastewater. The removal rates of the cellulose graft acrylate copolymer on copper ions and methylene blue in the wastewater respectively reach 95.1% and 99.5%. In addition, the cellulose graft acrylate copolymer adopts raw materials which are low in cost and easily obtained, is simple in preparation technology, low in cost and beneficial to industrialization.

Description

technical field [0001] The invention belongs to the technical field of polymers, and relates to the preparation of a cellulose-grafted acrylic acid copolymer; the invention also relates to the application of the cellulose-grafted acrylic acid copolymer as an adsorbent for removing heavy metal ions and organic cationic dyes in wastewater . Background technique [0002] Cellulose is the oldest and most abundant natural macromolecule on earth, and it is the most precious natural renewable resource for human beings inexhaustible. Fiber is made of D - glucopyranose ring via β A linear polysaccharide composed of -1,4 glycosidic bonds, the simple molecular formula is (C 6 H 10 O 5 ) n . Because cellulose is a fibrous polycapillary stereoregular polymer, it has the characteristics of porosity and large specific surface area, and contains many hydrophilic hydroxyl groups in the molecule, so it has certain adsorption performance. However, the direct use of natural cellulose as...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/06C08F226/10B01J20/26B01J20/30C02F1/28C02F1/62C02F103/30C02F101/38
Inventor 何玉凤王华王荣民黄一君王莹
Owner NORTHWEST NORMAL UNIVERSITY
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