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A kind of molecular cluster material of supramolecular polymer and its preparation method and application

A supramolecular polymer, molecular cluster technology, applied in chemical instruments and methods, descaling and water softening, special treatment targets, etc., can solve the problems of small exchange capacity, difficult automatic regeneration, short life, etc. , the effect of a wide range of use and low cost

Active Publication Date: 2018-02-27
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problems of easy saturation, small exchange capacity, short service life and difficulty in automatic regeneration of ion exchange resin descaling materials for drinking water, and according to the intermittent use of water dispensers and the characteristics of calcium carbonate crystallization, polystyrene is prepared by polymerization Microspheres, and using polystyrene microspheres as a carrier to synthesize supramolecular cluster materials with dendritic active groups, through the induced crystallization and growth of active groups (such as sulfonic acid groups, carboxyl groups, etc.) on the dendritic structure Finally, large particles of calcium carbonate of 2-6um are formed, which fall off by the impact force of water flow, and realize the regeneration of molecular cluster descaling materials

Method used

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  • A kind of molecular cluster material of supramolecular polymer and its preparation method and application
  • A kind of molecular cluster material of supramolecular polymer and its preparation method and application
  • A kind of molecular cluster material of supramolecular polymer and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Take 40mL of styrene monomer, 1.68g of polyvinylpyrrolidone as a dispersant, 0.42g of azobisisobutyronitrile as a free radical initiator, 180mL of absolute ethanol, 20mL of deionized water, and stir at a speed of 300-500r / min. Reacted at 70°C for 8h under nitrogen. After the reaction, the product was centrifuged / washed with ethanol (three cycles), and vacuum-dried at 60° C. for 24 hours to obtain molecular cluster substrate PS microspheres.

[0035]Take the base PS microspheres as seeds, add them to 0.25% SDS aqueous emulsion, add 0.6% to 0.7% swelling agent dichloromethane or 1,2-dichloroethane, and disperse them in the solution by ultrasonic emulsification, Swell at 30°C for 10h, and the stirring speed is about 100r / min. Then add 0.1%-0.3% initiator potassium persulfate (KPS) and 0.5-1.5% cross-linking agent ethylene glycol dimethacrylate, add 40%-50% functional monomer acrylic acid (AA), Disperse by ultrasonic emulsification and continue swelling at 30°C for 12h. ...

Embodiment 2

[0037] Prepare PS microspheres according to the steps in Example 1, add the dry PS microspheres to the mixed solution composed of concentrated nitric acid and concentrated sulfuric acid with a volume ratio of 2:3, and stir and react at 40°C at 400r / min for 2-3h. The product was filtered, centrifuged, and dried at 50°C for 24 hours to obtain light yellow nitropolystyrene microspheres (PS-NO 2 ). Then add 30mL 0.2mol / L NaOH aqueous solution and 2g Na 2 S 2 o 4 , stirred at 400r / min at 75°C for 4h, centrifuged and washed with deionized water several times to obtain aminopolystyrene microspheres.

[0038] Weigh 0.5g of amino polystyrene microspheres into a three-necked flask, add 10mL of ethanol, ultrasonically disperse, then add 12mL of ethanol solution containing 15% to 25% polyacrylic acid (PAA), stir and reflux at 70°C under nitrogen for 12h . The reaction product was washed to neutral with deionized water, and dried to obtain PS-PAA molecular clusters. Such as image 3...

Embodiment 3

[0040] Prepare PS microspheres according to the steps in Example 1, add 15% to 20% of dry PS microspheres to glycidol, add toluene to immerse, add pyridine, and stir at 260r / min at 80-95°C under nitrogen protection Reaction 24h. After the reaction, the product was repeatedly washed with deionized water and dried to obtain polystyrene glycidyl microspheres.

[0041] Take 2.0g of dry polystyrene glycidol microspheres and disperse them in 80-90mL of concentrated sulfuric acid, and sulfonate them at 40°C at 200-300r / min for 10h. After the reaction, the reactant was taken out by centrifugation, washed repeatedly with ethanol, and dried to obtain sulfonated polystyrene glycidyl microsphere clusters (PS-PG-SO 3 H molecular cluster). Example 4

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Abstract

The invention discloses a molecular cluster material of supramolecular polymer and a preparation method and application of the molecular cluster material. The preparation method includes the steps of firstly, preparing polystyrene microspheres; secondly, using polystyrene microspheres as the substrates, and grafting active groups containing a large amount of carboxyl or sulfonic group to the surfaces of the polystyrene microspheres so as to synthesize the molecular cluster material. The preparation method has the advantages that the method is simple, low in cost, low in energy consumption, environmentally friendly and free of pollution; the prepared molecular cluster material is efficient, stable, large in descaling amount, high in oxidation resistance, high in mechanical strength, easy in large-scale production and applicable to water scale removing of drinking water. The molecular cluster material has the advantages that crystal chemistry and hydromechanics are powerfully combined, and the molecular cluster material mainly uses physical descaling and is stable in descaling performance and capable of achieving automatic regeneration; the molecular cluster material is large in treatment capacity and wide in application range, and the effect of the molecular cluster material is more than 3 times of that of descaling using softened resin; the molecular cluster material is high in discharge water quality, and raw water hardness after treatment can reach an international standard.

Description

technical field [0001] The invention relates to a method for removing scale in drinking water by molecular clusters of supramolecular polymers, and belongs to the technical field of water treatment. Background technique [0002] Scale management is a common challenge in water supply and drinking water systems. At present, the global cost of cleaning and scaling treatment caused by scale is tens of billions of dollars per year. Since the water supply contains a large amount of heavy metal ions such as calcium and magnesium, solid carbonate scale will form on the inner wall of the pipeline equipment after long-term use, and the temperature of the water itself and the humid environment will provide living conditions for microorganisms and algae. There are problems such as equipment corrosion and embrittlement in the pipeline. For drinking water with high alkalinity and high hardness in the north, after boiling, a large amount of white water scale is formed, which seriously af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F257/02C08F220/06C08F8/30C08F8/36C08F8/08C08F112/08C08L25/06C08L33/02C02F5/10
CPCC02F5/10C02F2303/22C08F8/08C08F8/30C08F8/36C08F257/02C08L25/06C08F220/06C08L33/02C08F112/08
Inventor 肖凯军龚斌银玉容易立中
Owner SOUTH CHINA UNIV OF TECH
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