Preparation method of polyepichlorohydrin dimethylamine modified porous magnetic dextran microspheres

A polyepichlorohydrin and dextran technology is applied in the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., to achieve the effects of low energy consumption, good stability, and easy industrial production.

Inactive Publication Date: 2018-05-29
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only has the advantages of good mechanical properties of inorganic materials, but also has all the advantages of organic materials. At present, there is no report on the preparation of adsorbents by polyepichlorohydrin dimethylamine modified porous magnetic dextran microspheres.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Organic phase preparation: In the reactor, add petroleum ether: 83mL, dichloromethane: 21mL, octacosane: 18g, and stir well to form the organic phase;

[0026] (2) Water phase preparation: In the reactor, add deionized water: 54mL, dextran: 36g, nano-Fe 3 o 4 Magnetic particles: 7g, sodium hydroxide: 3g, ultrasonically dispersed, in water phase;

[0027] (3) Preparation of porous magnetic dextran microspheres: In a reactor, at room temperature, under stirring at a speed of 2000 rpm, spray 100 mL of the aqueous phase of step (2) into 100 mL of the organic phase of step (1). phase, stirred for 1 hour, the temperature rose to 60±2°C, 16 mL of epichlorohydrin was added, the reaction was continued for 9 hours, cooled to room temperature, solid-liquid separation, fully washed with deionized water, placed in a plastic container at -18~ Quickly freeze at -20°C, take it out, put it into a freeze-drying box, and freeze-dry for 24 hours to obtain porous magnetic dextran micr...

Embodiment 2

[0030] (1) Organic phase preparation: In the reactor, add petroleum ether: 77mL, dichloromethane: 23mL, octacosane: 20g, and stir well to form the organic phase;

[0031] (2) Water phase preparation: In the reactor, add deionized water: 50mL, dextran: 38g, nano-Fe 3 o 4 Magnetic particles: 10g, sodium hydroxide: 2g, ultrasonic dispersion, it is the water phase;

[0032] (3) Preparation of porous magnetic dextran microspheres: In a reactor, at room temperature, under stirring at a speed of 2000 rpm, spray 100 mL of the aqueous phase of step (2) into 100 mL of the organic phase of step (1). phase, stirred for 1 hour, the temperature rose to 60±2°C, added 20 mL of epichlorohydrin, continued to react for 8 hours, cooled to room temperature, separated from solid and liquid, washed thoroughly with deionized water, placed in a plastic container at -18~ Quickly freeze at -20°C, take it out, put it into a freeze-drying box, and freeze-dry for 24 hours to obtain porous magnetic dextran ...

Embodiment 3

[0035] (1) Organic phase preparation: In the reactor, add petroleum ether: 85mL, dichloromethane: 24mL, octacosane: 14g, and stir well to form the organic phase;

[0036] (2) Water phase preparation: In the reactor, add deionized water: 52mL, dextran: 40g, nano-Fe 3 o 4 Magnetic particles: 5g, sodium hydroxide: 3g, ultrasonically dispersed, in water phase;

[0037] (3) Preparation of porous magnetic dextran microspheres: In a reactor, at room temperature, under stirring at a speed of 2000 rpm, spray 100 mL of the aqueous phase of step (2) into 100 mL of the organic phase of step (1). In phase, stir for 1 hour, the temperature rises to 60±2°C, add 15 mL of epichlorohydrin, continue to react for 10 hours, cool to room temperature, separate solid and liquid, wash thoroughly with deionized water, place in a plastic container at -18~ Quickly freeze at -20°C, take it out, put it into a freeze-drying box, and freeze-dry for 24 hours to obtain porous magnetic dextran microspheres; ...

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Abstract

The invention discloses a method for preparing polyepichlorohydrin-dimethylamine-modified porous magnetic glucan microspheres. The method is characterized by including the steps that mineral ether, dichloromethane and octacosane serve as organic phases; glucan and nanometer Fe3O4 magnetic particles serve as water phases; the water phases are sprayed to the organic phases, epoxy chloropropane is added, the mixture is frozen and dried for 24 h, and the porous magnetic glucan microspheres are obtained; 64%-70% by mass of acetone, 2%-8% by mass of ethanediamine and 8%-14% by mass of polyepichlorohydrin dimethylamine are added into a reactor and dissolved, 12%-20% by mass of the porous magnetic glucan microspheres are added, the sum of all the components are 100%, and all the components are stirred and subjected to a reflux reaction for 4 h to 6 h at the constant temperature of 50 DEG C+ / -2 DEG C, cooling is carried out, then the product is washed with deionized water and acetone, subjected to solid-liquid separating and dried, and the polyepichlorohydrin-dimethylamine-modified porous magnetic glucan microspheres are obtained; an adsorbent has the quite-high adsorption capacity for bisphenol A and is repeatedly used, the cost is low, environmental protection is achieved, and meanwhile magnetism is easy to separate.

Description

technical field [0001] The invention relates to the technical field of a preparation method of a biosorbent, in particular to a preparation method of polyepichlorohydrin dimethylamine-modified porous magnetic dextran microspheres and an application technology for bisphenol A (BPA) adsorption. Background technique [0002] Polyepichlorohydrin dimethylamine is a new type of high-efficiency water-soluble cationic polymer containing functional groups such as hydroxyl, amine, and amine ions. It has a strong adsorption effect on bisphenol A in sewage. However, direct use will Residue in the treated water. Therefore, in order to further broaden the selection range of adsorbents and improve the adsorption effect, this application uses the polymer to modify the surface of porous magnetic dextran microspheres, which opens up new possibilities for its application in sewage treatment. A new path. [0003] Natural polymer magnetic microspheres are a new type of multifunctional material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28B01J13/02B01J13/06C02F1/28
CPCB01J13/02B01J13/06B01J20/06B01J20/262B01J20/28009B01J20/28021B01J2220/46B01J2220/4806B01J2220/4812C02F1/28C02F1/285C02F2101/345
Inventor 李慧芝翟玉博李晓峰
Owner UNIV OF JINAN
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