Method for nano modification of polyacrylamide flocculant

A polyacrylamide, nano-modification technology, applied in the direction of adsorption water/sewage treatment, etc., can solve the problems of insufficient adsorption of polyacrylamide, complex condensation device, long dissolution time, etc., to improve solubility, simplify operation steps, Inexpensive effect

Active Publication Date: 2015-12-23
HOPE (NANJING) LIFE SCI INNOVATION INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies existing in the prior art, the present invention solves the problems of large heat release, high temperature, and complex condensation device required by high-pressure ultraviolet light, and improves the problems of insufficient adsorption and long dissolution time of traditional polyacrylamide, and provides a reaction condition Synthesis method of high-adsorption modified polyacrylamide flocculant that is mild, does not need condensation, is energy-saving and environmentally friendly, and is easy to industrialize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Take 0.1g chitosan and dissolve it in the acetic acid solution whose mass fraction is 5% by magnetic stirring, after reaching the state of complete dissolution, add dropwise the sodium tripolyphosphate solution with the mass ratio of chitosan as 5:1 , and continued magnetic stirring for 30 minutes, and then ultrasonicated in an ultrasonic device for 5 minutes to obtain a nano-chitosan emulsion.

[0019] (2) Adding the acrylamide monomer that is 6:1 with the mass ratio of chitosan in the above emulsion and accounting for the total mass fraction of the mixture is 0.2% photoinitiator 2-hydroxyl-4'-(2-hydroxyethoxyl )-2-methylpropiophenone, stir to make it dissolve completely, and then feed nitrogen with a purity of 99.999% for 20 minutes to drive away the oxygen that can inhibit polymerization, and seal the bottle mouth under room temperature and place it under low-pressure ultraviolet light After 3h, a milky white jelly was obtained.

[0020] (3) Soak the jelly in a ...

Embodiment 2

[0022] (1) Take 0.1g chitosan and dissolve it in the acetic acid solution whose mass fraction is 4% by magnetic stirring, after reaching the state of complete dissolution, add dropwise the sodium tripolyphosphate solution with the mass ratio of chitosan as 4:1 , and continued magnetic stirring for 30 minutes, and then ultrasonicated in an ultrasonic device for 5 minutes to obtain a nano-chitosan emulsion.

[0023] (2) Adding the acrylamide monomer that is 7:1 with the mass ratio of chitosan in the above emulsion and accounting for 0.4% of the total mass fraction of the mixture is the photoinitiator 2-hydroxyl-4'-(2-hydroxyethoxyl )-2-methylpropiophenone, stir to make it dissolve completely, and then feed nitrogen with a purity of 99.999% for 20 minutes to drive away the oxygen that can inhibit polymerization, and seal the bottle mouth under room temperature and place it under low-pressure ultraviolet light After 3h, a milky white jelly was obtained.

[0024] (3) Soak the jell...

Embodiment 3

[0026] (1) Take 0.2g chitosan and dissolve it in the acetic acid solution whose mass fraction is 3% by magnetic stirring, after reaching the state of complete dissolution, add dropwise the sodium tripolyphosphate solution with the mass ratio of chitosan as 4:1 , and continued magnetic stirring for 30 minutes, and then ultrasonicated in an ultrasonic device for 5 minutes to obtain a nano-chitosan emulsion.

[0027] (2) Adding the acrylamide monomer that is 7:1 with the mass ratio of chitosan in the above emulsion and accounting for the total mass fraction of the mixture is 0.8% photoinitiator 2-hydroxyl-4'-(2-hydroxyethoxyl )-2-methylpropiophenone, stir to make it dissolve completely, then feed nitrogen with a purity of 99.999% for 25 minutes to drive away the oxygen that can inhibit polymerization, and seal the bottle mouth under room temperature and place it under a low-pressure ultraviolet lamp After 3h, a milky white jelly was obtained.

[0028] (3) Soak the jelly in a mix...

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Abstract

The invention discloses a method for nano modification of polyacrylamide flocculant, and belongs to the field of environment-friendly water treatment materials. The method includes the steps that chitosan is completely dissolved in an acetic acid solution in a magnetic stirring state, a sodium tripolyphosphate solution is added drop by drop, stirring is continued, and the mixed solution is put in an ultrasonic device to prepare a nano chitosan solution ultrasonically; acrylamide monomers and photoinitiator are added into the obtained solution and dissolved through stirring, nitrogen is introduced to remove oxygen and seal a reaction bottle, and the reaction bottle is placed under a low-voltage ultraviolet lamp to generate milk white colloid through illumination polymerization; the colloid is soaked in a mixed solution of absolute ethyl alcohol and acetone, flushed with distilled water, put into a vacuum drying oven to be dried, ground and screened to obtain the final nano chitosan/polyacrylamide flocculant in a white powder form. Reaction conditions are moderate, polymerization time is short, condensation cooling is not needed, energy consumption and cost are reduced, industrialization is easy, and the obtained modified polyacrylamide flocculant has adsorption and bridging capacity.

Description

technical field [0001] The invention belongs to the field of environment-friendly water treatment materials, and relates to a synthesis method of a water-soluble organic polymer water treatment flocculant, in particular to a synthesis method of a nano-modified polyacrylamide flocculant. Background technique [0002] With the increasingly serious water pollution in my country and the continuous improvement of environmental protection requirements, the market demand for water treatment flocculants has increased significantly. However, my country's polyacrylamide output is low and its quality is poor, and it still relies on imported products with higher costs. Therefore, it is imminent to develop high-quality, environmentally friendly and low-cost new water treatment flocculants. Water treatment flocculants mainly include inorganic flocculants and organic polymer flocculants. Compared with inorganic flocculants, organic polymer flocculants use less amount, faster flocculation s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C02F1/28
Inventor 马江雅付坤施军张新喜丁磊张源林秦川
Owner HOPE (NANJING) LIFE SCI INNOVATION INST CO LTD
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