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Phosphorus-containing polymer hydrogel as well as preparation method and application thereof

A hydrogel and polymer technology, applied in the direction of alkali metal compounds, chemical instruments and methods, water pollutants, etc., can solve problems that are rarely reported, and achieve regeneration, excellent solubility, and strong coordination ability Effect

Active Publication Date: 2021-11-26
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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  • Phosphorus-containing polymer hydrogel as well as preparation method and application thereof
  • Phosphorus-containing polymer hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a 500mL round-bottomed three-necked flask equipped with a thermometer, a 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 Joint agent and 0.01wt% polyvinyl alcohol, the three substances were fully dissolved in 200mL deionized water at 65°C and vigorously mechanically stirred, and mixed evenly. Dissolve the initiator benzoyl peroxide in an appropriate amount of toluene to prepare an initiator solution with a concentration of 0.01wt%. After the polymerization starts, add the initiator solution drop by drop to the polymerization reaction system, and maintain constant temperature crosslinking at 65°C Polymerization 2h. The synthesized gel microspheres were rinsed repeatedly in secondary deionized water and then dried under vacuum at 50°C until the mass remained unchanged.

[0036] Adsorption test procedure of copolymer hydrogel on indium ions: first ad...

Embodiment 2

[0040] Add 120 parts by mass of vinylphosphonic acid and 186 parts by mass of acrylic acid to a 500mL three-necked bottle, then add 3 parts by mass of N-maleamide chitosan, and finally add 200mL of deionized water, stir fully to make the three The substances were mixed well and evenly, nitrogen gas was passed into the polymerization device and kept for 30 minutes, and the temperature was raised to 80°C to maintain a constant temperature state. 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 dropped into the polymerization system drop by drop under the condition of 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 monomers that did not participate in the polymerization reaction in the hydrogel, and the deionized water was replaced regularly until the de...

Embodiment 3

[0045] Polyvinylphosphonic acid nanogel synthesis: 67 mL of vinylphosphonic acid was dispersed in 0.01 M 3000 mL of hexadecane with 10 mole % ethylene glycol dimethacrylate (14.4 mL) relative to the total monomer amount in trimethylammonium bromide solution. The mixture was stirred for 3 min using magnetic stirring 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 and kept for 20 minutes to equilibrate the system temperature to 75° C., and polymerization was initiated by adding 100 mL of an aqueous ammonium persulfate solution with a concentration of 0.01734 g / mL. 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 recentrifuged at least 5 times. The product was dried overnight using a freeze dryer and stored in airtight vials for f...

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Abstract

Phosphorus-containing polymer hydrogel is prepared by the following steps: 1) mixing a phosphonic acid olefin compound with an acrylate compound or an acrylamide compound or a vinyl azole compound to obtain a mixture, dissolving the mixture as a comonomer in a first solvent, and adding a cross-linking agent to obtain a monomer solution for later use; 2) dissolving an initiator in a second solvent to obtain an initiator solution for later use; and 3) heating the monomer solution to 60-80 DEG C, dropwise adding the initiator solution, and copolymerizing to obtain a hydrogel product. The phosphorus-containing polymer hydrogel prepared by the invention has high adsorption efficiency on pollutants in wastewater, can be regenerated and reused, and is a green and renewable wastewater adsorption material.

Description

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

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/264B01J20/28047C02F1/285C02F2101/20C02F2101/308
Inventor 段彩均向英付登林陈若楠罗璇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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