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Preparation method and application of acrylamide modified grafted corn cob

A technology of acrylamide and graft modification, which is applied in the chemical field to achieve good development and application prospects, benefit environmental protection, and increase added value

Inactive Publication Date: 2011-11-23
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no research report on acrylamide grafted corn cob and its flocculation performance at home and abroad.

Method used

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  • Preparation method and application of acrylamide modified grafted corn cob
  • Preparation method and application of acrylamide modified grafted corn cob
  • Preparation method and application of acrylamide modified grafted corn cob

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~10

[0024] Examples 1-10, preparation of acrylamide graft modified corncob (optimized condition of maleic acid modified corncob) and investigation of flocculation performance

[0025] General method of preparation: Add 4.0 g of corn cob powder and 500 mL of sodium hydroxide solution with a mass fraction of 20% in a pressure cooker, cook for 4 hours at a temperature of 120 °C and a pressure of 0.11 MPa, filter with suction, and vacuum-dry the filter cake at a temperature of 60 °C to constant weight , to obtain alkalized corncob; add alkalized corncob 1.0g and toluene in a 250mL three-necked flask X 1 mL, set temperature X 2 ℃ Soak in water bath X 3 hours, then add maleic anhydride X 4 g of acetone solution 5mL, at temperature X 5 ℃ reaction X 6 minutes, cooled to room temperature, washed 3 times with acetone, and dried to obtain maleic anhydride modified corncobs; add 0.5g of maleic anhydride modified corncobs and 70mL of water into a 250mL four-neck flask, and heat ...

Embodiment 11~30

[0031] Examples 11~30, preparation of acrylamide graft modified corn cob (optimization of graft copolymerization conditions of acrylamide and maleic anhydride modified corn cob) and investigation of flocculation performance

[0032] General method of preparation: Add 4.0 g of corn cob powder and 500 mL of sodium hydroxide solution with a mass fraction of 20% in a pressure cooker, cook for 4 hours at a temperature of 120 °C and a pressure of 0.11 MPa, filter with suction, and vacuum-dry the filter cake at a temperature of 60 °C to constant weight , to obtain alkalized corncobs; add 1g of alkalized corncobs and 20mL of toluene into a 250mL three-necked flask, soak in a water bath at a temperature of 40°C for 5 hours, then add 10mL of acetone solution of 0.4g of maleic anhydride, and react at a temperature of 80°C After 90 minutes, cool to room temperature, wash 3 times with acetone, and dry to obtain maleic anhydride modified corncobs; add maleic anhydride modified corncobs 0...

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Abstract

The invention relates to the chemical field and discloses a preparation method of acrylamide modified grafted corn cob. The preparation method comprises the following steps: the agricultural waste corn cob is used as a raw material, maleic anhydride is used to modify the corn cob, then ammonium persulfate is used as an initiator, N,N-methylene diacrylamide is used as a crosslinking agent to perform graft copolymerization with acrylamide to prepare the modified corn cob. The product has good stability and flocculation performance, the flocculating rate is up to 89.66%, and the product can be used as a flocculant; and the product has better development and application prospects in the water treatment field. By adopting the method, agricultural resources can be utilized reasonably, the added value of the agricultural product can be increased, environment protection can be favored and the sustainable development strategy is beneficial to realization.

Description

technical field [0001] The invention belongs to the field of chemistry, and relates to a preparation method of a copolymer, in particular to a preparation method of a corncob-maleic anhydride-polyacrylamide copolymer (that is, acrylamide graft-modified corncob), and also relates to the copolymerization application of things. Background technique [0002] Due to the increasingly serious water resource crisis and water pollution problems in our country and even in the world, water treatment issues have become more and more important, and water treatment technology has also developed rapidly. Among them, the flocculation method is widely used in water supply and sewage treatment because of its simplicity and economy. One of the key technologies of the flocculation method is the flocculant, which can destabilize the fine suspended matter and colloidal particles that are difficult to settle naturally in the water, and form larger particles or flocs through mutual collision, aggl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/56C08H8/00C02F1/56
Inventor 陈盛明李宁邵承斌
Owner CHONGQING TECH & BUSINESS UNIV
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