A kind of phosphorus-containing polymer hydrogel and its preparation method and application

A technology of hydrogels and polymers, applied in the directions of alkali metal compounds, chemical instruments and methods, water pollutants, etc. Effect

Active Publication Date: 2022-06-24
重庆市化工研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many reports on the application of polyvinylphosphonic acid, there are few reports on vinylphosphonic acid copolymer and its application in the field of water treatment.

Method used

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  • A kind of phosphorus-containing polymer hydrogel and its preparation method and application
  • A kind of phosphorus-containing polymer hydrogel and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a 500mL round-bottom three-necked flask equipped with a thermometer, dropping funnel and mechanical stirring, add 75 parts by mass of vinylphosphonic acid and 25 parts by mass of methacrylic acid, add 30 wt% polyethylene glycol diacrylate cross The joint agent and 0.01wt% polyvinyl alcohol were fully dissolved in 200 mL of deionized water at 65°C under constant temperature and vigorous mechanical stirring and mixed uniformly. The initiator benzoyl peroxide was dissolved in an appropriate amount of toluene to prepare an initiator solution with a concentration of 0.01wt%. After the polymerization started, the initiator solution was added dropwise to the polymerization reaction system, and the crosslinking was maintained at a constant temperature of 65 °C. Aggregate for 2h. The synthesized gel microspheres were washed repeatedly in secondary deionized water and dried under vacuum at 50 °C until the quality remained unchanged.

[0036] The experimental steps for the adsor...

Embodiment 2

[0040] Add 120 parts by mass of vinylphosphonic acid and 186 parts by mass of acrylic acid to a 500 mL three-necked flask, then add 3 parts by mass of N-maleamide chitosan, and finally add 200 mL of deionized water, stir well to make the three The substances were fully mixed and uniform, nitrogen was introduced into the polymerization device and kept for 30 minutes, and the temperature was raised to 80°C and then kept at a constant temperature. 1.6 parts by mass of the initiator 2'2-azobisisobutylamidine dihydrochloride was dissolved in an appropriate amount of deionized water, and the initiator was added dropwise to the polymerization system at a constant temperature of 80°C. After 0.5 h of cross-linking polymerization, the prepared hydrogel product was taken out and soaked in deionized water for 48 h to remove the monomers that did not participate in the polymerization reaction in the hydrogel, and the deionized water was regularly replaced until the deionized water became ne...

Embodiment 3

[0045] Polyvinylphosphonic acid nanogel synthesis: 67 mL of vinylphosphonic acid was dispersed in 0.01 M 3000 mL of hexadecane together with 10 mol% ethylene glycol dimethacrylate (14.4 mL) relative to the total monomer amount in trimethylammonium bromide solution. The mixture was stirred using magnetic stirring for 3 minutes to obtain a clear isotropic solution, which was then placed in a temperature-controlled oil bath at 75°C. The stirring rate was adjusted to 600 rpm for 20 minutes to equilibrate the system temperature to 75°C, and polymerization was initiated by adding 100 mL of 0.01734 g / mL aqueous ammonium persulfate solution. Polymerization was carried out for 8 hours and the nanogels were purified by centrifugation at 11000 rpm for 20 minutes at 20°C, then the supernatant was removed and redispersed in deionized water and re-centrifuged at least 5 times. The product was dried overnight using a freeze dryer and stored in airtight vials for further use.

[0046] To de...

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Abstract

A phosphorus-containing polymer hydrogel, comprising the following steps of preparation: 1) taking a phosphonic acid olefin compound, mixing it with an acrylic ester compound, an acrylamide compound or a vinyl azole compound, as a comonomer, dissolving in the first In the solvent, add a cross-linking agent to obtain a monomer solution for later use; 2) dissolve the initiator in the second solvent to obtain an initiator solution for later use; 3) raise the temperature of the monomer solution to 60-80°C, and add the initiator dropwise solution, copolymerized to obtain a hydrogel product. The phosphorus-containing polymer hydrogel prepared by the invention has high adsorption efficiency for pollutants in waste water, can be regenerated and reused, and is a green and reproducible waste water adsorption material.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a phosphorus-containing polymer hydrogel and a preparation method and application thereof. Background technique [0002] The environmental effects caused by the rapid advancement of industrialization have gradually attracted widespread attention. In particular, the discharge of industrial wastewater has caused a huge impact on people's daily life. The characteristics of easy loss and easy diffusion make the treatment of industrial wastewater particularly difficult. [0003] There are many types of industrial wastewater. According to the chemical properties of the main pollutants contained, it can be divided into inorganic wastewater (such as electroplating wastewater) and organic wastewater (such as food processing wastewater); according to the products and processing objects of industrial enterprises, it can be divided into papermaking Wastewater, textile wastewater, tanning was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L43/02B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/264B01J20/28047C02F1/285C02F2101/20C02F2101/308
Inventor 段彩均向英付登林陈若楠罗旋颜邦民兰剑平张丹蒋小琴
Owner 重庆市化工研究院有限公司
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