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A kind of cationic cyclodextrin-based hydrogel adsorption material and synthesis method thereof

A technology of adsorption materials and synthesis methods, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants and other directions, can solve the problems of less research, less adsorption, ineffective effects, etc., and achieves a simple preparation process, Accessible, Inexpensive Effects

Active Publication Date: 2022-07-08
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In summary, the existing cyclodextrin-based adsorbents can spontaneously capture hydrophobic organic molecules by utilizing multiple reactive hydroxyl functional groups in their structure and having the characteristics of a hydrophilic outer cavity and a hydrophobic inner cavity. and heavy metal ions, but the existing cyclodextrin-based adsorbents have little adsorption capacity for anionic organic matter and phosphorus-based flame retardants in water, and there are few studies, so they cannot achieve the desired effect; at the same time, cyclodextrin itself is easily It is soluble in water, so it must be polymerized before it can be used as an excellent adsorbent. Cyclodextrin is cationized and polymerized, which not only maintains its ability to capture organic molecules, but also has good swelling properties of hydrogels and better stability. sex and chemical tunability etc.

Method used

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  • A kind of cationic cyclodextrin-based hydrogel adsorption material and synthesis method thereof
  • A kind of cationic cyclodextrin-based hydrogel adsorption material and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 1g of β-cyclodextrin in 25ml of 0.8wt.% sodium hydroxide solution, stir until completely mixed, add 6.5g of 2,3-epoxypropyltrimethylammonium chloride to the solution, heat at 70°C Stir for 4 hours; vacuum dry to constant weight at 80°C to obtain β-cyclodextrin cationic derivative.

[0036] The obtained β-cyclodextrin cationic derivative was dissolved in 2.5 ml of water, 2.5 g of acrylamide was added, and the mixture was stirred at room temperature for 1 hour at a rotational speed of 500 rpm. Then add 0.2g cross-linking agent N,N'-methylenebisacrylamide (MBA), stir until the cross-linking agent MBA is completely dissolved, add 0.25mL accelerator N,N,N',N'-tetramethyl ethyl acetate Diamine (TEMED). When the above substances are mixed uniformly, add 5 mL of saturated potassium persulfate solution (KPS) solution of initiator, and stir at room temperature until hydrogel is formed. The resulting hydrogel was transferred to a glass bottle and immersed in deionized w...

Embodiment 2

[0039] Dissolve 1.5g of β-cyclodextrin in 25ml of 0.8wt.% sodium hydroxide solution, stir until completely mixed, add 10.5g of 2,3-epoxypropyltrimethylammonium chloride to the solution, heat for 70 Stir at °C for 4 hours; vacuum dry at 80 °C to constant weight to obtain β-cyclodextrin cationic derivative.

[0040] The obtained β-cyclodextrin cationic derivative was dissolved in 2.5 ml of water, 2.5 g of acrylic acid was added, and the mixture was stirred at room temperature for 1 hour at a rotational speed of 500 rpm. Then add 0.2g cross-linking agent N,N'-methylenebisacrylamide (MBA), stir until the cross-linking agent MBA is completely dissolved, add 0.25mL accelerator N,N,N',N'-tetramethyl ethyl acetate Diamine (TEMED). When the above substances are mixed evenly, add 5 mL of saturated ammonium persulfate solution (APS) solution of the initiator, and stir at room temperature until a hydrogel is formed. The resulting hydrogel was transferred to a glass bottle and immersed i...

Embodiment 3

[0043] Dissolve 1g of β-cyclodextrin in 25ml of 8wt.% sodium hydroxide solution, stir until completely mixed, add 10.5g of 2,3-epoxypropyltrimethylammonium chloride to the solution, heat at 70°C and stir 6 hours; vacuum drying at 80°C to constant weight to obtain β-cyclodextrin cationic derivatives.

[0044] The obtained β-cyclodextrin cationic derivative was dissolved in 2.5 ml of water, 1 g of acrylic acid was added, and the mixture was stirred at room temperature for 1 hour at a rotational speed of 500 rpm. Then add 0.2g cross-linking agent N,N'-methylenebisacrylamide (MBA), stir until the cross-linking agent MBA is completely dissolved, add 0.25mL accelerator N,N,N',N'-tetramethyl ethyl acetate Diamine (TEMED). When the above substances are mixed uniformly, add 5 mL of saturated potassium persulfate solution (KPS) solution of initiator, and stir at room temperature until hydrogel is formed. The resulting hydrogel was transferred to a glass bottle and immersed in deionize...

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Abstract

The invention discloses a cationic cyclodextrin-based hydrogel adsorption material and a synthesis method thereof. The method for synthesizing the material is to mix β-cyclodextrin and 2,3-epoxypropyltrimethyl ammonium chloride according to a certain proportion, and continuously stir in an alkaline solution to complete the cationization of β-cyclodextrin to obtain β-Cyclodextrin cationic derivative, the three reactants of β-cyclodextrin cationic derivative, acrylamide (or acrylic acid) and methylenebisacrylamide are subjected to free radical polymerization to synthesize gel substance at one time, and then After drying, the prepared cationic cyclodextrin-based hydrogel adsorbent material. The material has a good adsorption effect on organic pollutants such as phosphorus-based flame retardants, anionic dyes, organophosphorus pesticides in water, is easy to prepare, has excellent swelling properties, good stability in the pH range of 3-11, and is resistant to ion interference. It is strong, can be recycled for many times, and has no secondary pollution, and has great application prospects.

Description

technical field [0001] The invention belongs to the technical field of composite materials and environmental science, and particularly relates to a method for synthesizing a cationic cyclodextrin-based hydrogel adsorption material. Background technique [0002] With the accelerating process of industrialization and the rapid development of the national economy, more and more pollutants enter the environmental medium, resulting in the deterioration of environmental quality. Among them, there are many kinds of organic pollutants, and the generated organic wastewater has also become a serious problem in the field of water pollution control. As a representative organic wastewater, dye wastewater has the characteristics of large water volume, high content of organic pollutants, large alkalinity, and large changes in water quality; it contains azo groups (-N=N-), aromatic rings and sulfonic acid groups. Anionic dyes with acid salt groups may be toxic and potentially carcinogenic;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/28047B01J20/28054C02F1/285C02F2101/30
Inventor 王毅力李俊仪李小林仝瑶周妍卿
Owner BEIJING FORESTRY UNIVERSITY
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