Micro/nano size beta-cyclodextrin polymer powder as well as preparation method and application thereof

A cyclodextrin polymer, micro-nano technology, applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve the problems of low mechanical strength, limited application efficiency, low adsorption efficiency, etc. To achieve the effect of high adsorption efficiency and simple process

Inactive Publication Date: 2018-09-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the isocyanate β-cyclodextrin cross-linked polymers reported in the current patents and literatures generally have the disadvantages of low mechanical strength and low adsorption efficiency, and the prepared block polymer products must be ground into powders for further processing. use, which limits the efficiency of its application
At present, there are few reports on the preparation of β-cyclodextrin cross-linked polymers with nano-sized structures and their application in the field of adsorption.

Method used

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  • Micro/nano size beta-cyclodextrin polymer powder as well as preparation method and application thereof
  • Micro/nano size beta-cyclodextrin polymer powder as well as preparation method and application thereof
  • Micro/nano size beta-cyclodextrin polymer powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, no catalyst is added during the preparation process to obtain a micron-sized β-cyclodextrin polymer. The typical sample properties and surface morphology are as follows figure 1 shown.

[0031] The preparation method is as follows:

[0032] Weigh 2.27g of β-cyclodextrin into a 250mL three-neck flask containing 40mL of methyl ethyl ketone, then transfer the three-necked flask to an oil bath equipped with a mechanical stirring device, and stir at room temperature at a speed of 250rpm for 15min. The temperature of the oil bath was gradually increased to 80°C, and 5.44 g of triphenylmethane triisocyanate in ethyl acetate was added dropwise to the reaction solution through a constant-pressure dropping funnel under stirring, and the reaction was continued for 10 h with stirring. After the reaction was completed, the reaction solution was cooled to room temperature and filtered with suction, and then the solid product was washed three times with acetone and h...

Embodiment 2

[0034] In this example, tin isooctoate is used as a catalyst to obtain a micron-sized β-cyclodextrin polymer. The typical sample properties and surface morphology are as follows: figure 2 shown.

[0035] The preparation method is as follows:

[0036] Weigh 2.27g of β-cyclodextrin and 0.0486g of tin isooctanoate into a 250mL three-neck flask containing 40mL of butanone, then transfer the three-necked flask to an oil bath with a mechanical stirring device, at room temperature at a speed of 250rpm Stir for 15min. The temperature of the oil bath was gradually increased to 60°C, and 5.44 g of ethyl acetate solution of triphenylmethane triisocyanate was added dropwise to the reaction solution through a constant pressure dropping funnel under stirring, and the stirring reaction was continued for 4 h. After the reaction was finished, the reaction solution was cooled to room temperature and filtered with suction, and then the solid product was washed three times with acetone and 60°...

Embodiment 3

[0038] In this example, N-methylmorpholine is used as a catalyst to obtain a micron-sized β-cyclodextrin polymer. The typical sample properties and surface morphology are as follows image 3 shown.

[0039] The preparation method is as follows:

[0040] Weigh 2.27g β-cyclodextrin and 0.0121g N-methylmorpholine to a 250mL three-necked flask equipped with 40mL butanone, then transfer the three-necked flask to an oil bath with a mechanical stirring device. Stir at 250 rpm for 15 min. The temperature of the oil bath was gradually increased to 60°C, and 10.89 g of ethyl acetate solution of triphenylmethane triisocyanate was added dropwise to the reaction solution through a constant pressure dropping funnel under stirring, and the reaction was continued for 7 hours with stirring. After the reaction, the three-necked flask was taken out, and the reaction liquid was cooled to room temperature, then filtered with suction, and then the solid product was washed three times with acetone...

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Abstract

The invention discloses micro/nano size beta-cyclodextrin polymer powder as well as a preparation method thereof and application thereof. The preparation method comprises the following steps: dispersing a beta-cyclodextrin in a butanone solvent; using triphenylmethane triisocyanate as a cross-linking agent; heating, stirring and reacting for 2-10 hours without adding a catalyst or adding differentkinds of catalysts; then, washing with acetone and hot water to obtain a polymer powder product; and drying at 60 DEG C for 24 hours to obtain the micro/nano size beta-cyclodextrin polymer powder, wherein the polymer powder can be used as an adsorbing material for extraction and recovery of chlorophenol in wastewater. The method has advantages that the preparation process is simple, and the obtained beta-cyclodextrin polymer powder has a micro/nano size and has high adsorbing efficiency for chlorophenol.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a micronano-sized β-cyclodextrin polymer powder and a preparation method and application thereof. Background technique [0002] β-cyclodextrin is a cyclic oligosaccharide composed of 7 D-glucopyranose units connected by α-(1,4)-glycosidic bonds. Currently, β-cyclodextrin can be degraded by enzymes The starch process is industrialized and the cost is low. Due to its special cavity structure of "hydrophilic on the outside and hydrophobic on the inside", β-cyclodextrin can form host-guest inclusion complexes with guest substances of appropriate size in aqueous solution. The excellent inclusion ability makes β-cyclodextrin widely used in the field of separation, and one of the important uses is to prepare adsorption materials through β-cyclodextrin. [0003] Preparation of β-cyclodextrin water-insoluble polymer by cross-linking polymerization not only maintains the hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/16C02F1/28C02F101/36C02F101/34
CPCC02F1/28C02F1/285C02F2101/345C02F2101/36C08B37/0012
Inventor 柴坤刚周利琴纪红兵徐志君
Owner GUANGXI UNIV
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