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Magnetic dendritic polymer composite nanoparticle, and preparation method and application thereof

A composite nanoparticle and nanoparticle technology, applied in the field of magnetic dendritic polymer composite magnetic nanoparticles and their preparation, and magnetic dendritic polymer composite magnetic nanoparticles, can solve the problem of poor recycling effect, poor material stability, solid loading problems such as low capacity, to achieve the effect of increasing immobilization capacity, fewer synthesis steps, and enhanced condition tolerance

Active Publication Date: 2018-02-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application of immobilized enzymes, simple magnetic materials have prominent problems such as low immobilization capacity, poor recycling effect, and poor material stability, which limit their application to immobilized enzymes to a considerable extent.

Method used

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  • Magnetic dendritic polymer composite nanoparticle, and preparation method and application thereof
  • Magnetic dendritic polymer composite nanoparticle, and preparation method and application thereof
  • Magnetic dendritic polymer composite nanoparticle, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: Amino-modified iron ferric oxide nanoparticles Fe 3 o 4 -NH 2 Synthesis

[0045] 1 g FeCl 3 •6H 2 O was ultrasonically dissolved in 30 mL of ethylene glycol solution, placed in a water bath with magnetic stirring turned on, and 2 g of sodium acetate was added to continue stirring at 500 r / min for 30 min. Pour the solution into a beaker, add 6.5 g of 1,6-ethylenediamine and stir. The obtained red solution was poured into a polytetrafluoroethylene-lined autoclave, and then put into a high-temperature oven at 160 °C after tightening, and taken out after high-temperature reaction for 3 h. After the autoclave had cooled, the Teflon liner was removed and the product was transferred to a beaker. Then use a Buchner funnel to carry out suction filtration to obtain black granular particles, wash with absolute ethanol, then clean with deionized water, and finally carry out solid-liquid separation with a centrifuge, and pour out the black product obtained after ...

Embodiment 2

[0046] Embodiment 2: Amino-modified iron ferric oxide nanoparticles Fe 3 o 4 -NH 2 Synthesis

[0047] 2 g FeCl 3 •6H 2 O was ultrasonically dissolved in 60 mL of ethylene glycol solution, placed in a water bath with magnetic stirring turned on, and 4 g of sodium acetate was added to continue stirring at 800 r / min for 30 min. Pour the solution into a beaker, add 13 g of 1,6-ethylenediamine and stir. The obtained red solution was poured into a polytetrafluoroethylene-lined autoclave, tightened and placed in a high-temperature oven at 198 °C for 6 h after high-temperature reaction. After the autoclave had cooled, the Teflon liner was removed and the product was transferred to a beaker. Then use a Buchner funnel to carry out suction filtration to obtain black granular particles, wash with absolute ethanol, then clean with deionized water, and finally carry out solid-liquid separation with a centrifuge, and pour out the black product obtained after the supernatant. into an e...

Embodiment 3

[0048] Embodiment 3: the iron ferric oxide nanoparticles Fe of amino modification 3 o 4 -NH 2 Synthesis

[0049] 5 g FeCl 3 •6H 2 O was ultrasonically dissolved in 150 mL of ethylene glycol solution, placed in a water bath with magnetic stirring turned on, and 6 g of sodium acetate was added to continue stirring at 1000 r / min for 30 min. Pour the solution into a beaker, add 30 g of 1,6-ethylenediamine and stir. The obtained red solution was poured into a polytetrafluoroethylene-lined autoclave, and then put into a high-temperature oven at 250 °C after tightening, and taken out after high-temperature reaction for 12 h. After the autoclave had cooled, the Teflon liner was removed and the product was transferred to a beaker. Then use a Buchner funnel to carry out suction filtration to obtain black granular particles, wash with absolute ethanol, then clean with deionized water, and finally carry out solid-liquid separation with a centrifuge, and pour out the black product ob...

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Abstract

The invention relates to a magnetic dendritic polymer composite magnetic nanoparticle, and a preparation method and application thereof, and belongs to the technical field of chemical material preparation. According to the preparation method, an amino modified ferriferrous oxide nanoparticle is added into glutaraldehyde and anhydrous methanol, and the mixture is mechanically stirred for a period of time and filtered with suction; the obtained product is washed with anhydrous methanol and centrifuged; the obtained precipitate is transferred to a one-neck flask containing anhydrous methanol, andfour-arm polyethylene glycol amine is added to the formed black suspension; mechanical stirring is performed under a water bath condition, and sodium cyanoborohydride with an equal amount is added during the stirring by stages; and after the stirring is finished, the product is separated out by a magnet, is washed with anhydrous ethanol and deionized water, and is centrifuged, placed in a vacuumoven and dried under vacuum. The prepared magnetic dendritic polymer composite nanoparticle is used for immobilization of cellulase. The magnetic dendritic polymer composite material synthesized by the preparation method has the superparamagnetic property, and the immobilization of cellulase can improve the enzymatic activity and the storage stability of the cellulase, thereby achieving reuse of the cellulase.

Description

technical field [0001] The invention relates to a magnetic dendritic polymer composite magnetic nanoparticle and its preparation method and application, in particular to a magnetic dendritic polymer composite magnetic nanoparticle Fe 3 o 4 -NH 2 @4arm-PEG-NH 2 The synthesis and its preparation and application in immobilized cellulase belong to the technical field of chemical material preparation. Background technique [0002] Cellulose, the most abundant renewable and biodegradable macromolecular polymer, is a promising raw material for the production of chemicals, which have been widely used in various industries. The value of cellulose lies mainly in its ability to be chemically converted into some derivatives. Films and raw materials for various cellulose derivative products are used in many industries such as food, printing, cosmetics, oil drilling, textiles, pharmaceuticals and household life. Cellulose comes from a wide variety of sources, such as plants, microorg...

Claims

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Application Information

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IPC IPC(8): C08G83/00C12N11/14C12N11/08
CPCC08G83/001C12N9/2437C12N11/08C12N11/14
Inventor 戎军辉王赟韩娟李春梅李程唐旭倪良
Owner JIANGSU UNIV
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