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A tannic acid-guided copolymerization-coated magnetic solid-phase extraction polyphenol adsorbent and its preparation method

A technology of tannic acid and adsorbent, which is applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of non-magnetic particle wrapping, low formation efficiency, material waste, etc., and achieve magnetic enrichment and separation The effect of simplicity, high utilization rate and wide source of raw materials

Active Publication Date: 2020-05-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional polymer encapsulation method for magnetic particles is not efficient, and cannot be effectively wrapped on the surface of magnetic particles, resulting in waste of materials and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 40 mg of Fe3O4 nanoparticles were stirred and mixed with an aqueous solution (1 mmol / mL) containing 2 mg of tannic acid (stirring time 10 min), and the tannic acid was coated on the surface of the magnetic particles (TLC monitored the total adsorption of tannic acid). Then add 1.2 ml of water, N-vinylpyrrolidone (1.33 mmol), N-isopropylacrylamide (0.67 mmol), ethylene glycol dimethacrylate (0.16 mmol), azobisisobutyl Nitrile (0.05 mmol), sodium dodecylbenzenesulfonate (1 mg), nitrogen protection. Placed on a thermo-oscillating reactor and heated to 60 degrees Celsius for oscillating reaction for 1 hour, removed the supernatant, washed 3 times with ethanol, and washed 5 times with water to obtain magnetic solid-phase extraction agent particles. Thermogravimetric analysis showed that there were 60% single The bulk material is coated with magnetic particles.

Embodiment 2

[0035] 40 mg ferric oxide nanoparticles were stirred and mixed with an aqueous solution containing 3 mg tannic acid (stirring time 10 min), and the tannic acid was coated on the surface of the magnetic particles (TLC monitored the total adsorption of tannic acid). Then add 1.2 ml of water, N-vinylpyrrolidone (1.33 mmol), N-isopropylacrylamide (0.8 mmol), ethylene glycol dimethacrylate (0.16 mmol), azobisisobutyl Nitrile (0.05 mmol), sodium dodecylbenzenesulfonate (1.5 mg), nitrogen protection. Place on a thermo-oscillating reactor and heat to 60°C for oscillating reaction for 1 hour, remove the supernatant, wash 3 times with ethanol, and then wash 5 times with water to obtain magnetic solid-phase extraction agent particles. Thermogravimetric analysis shows that there are 65% single The bulk material is coated with magnetic particles.

Embodiment 3

[0037] 40 mg ferric oxide nanoparticles were stirred and mixed with an aqueous solution containing 5 mg tannic acid (stirring time 15 min), and the tannic acid was coated on the surface of the magnetic particles (TLC monitored the total adsorption of tannic acid). Then add 1.2 ml of water, N-vinylpyrrolidone (1.33 mmol), N-isopropylacrylamide (0.8 mmol), ethylene glycol dimethacrylate (0.16 mmol), azobisisobutyl Nitrile (0.05 mmol), sodium dodecylbenzenesulfonate (1 mg), nitrogen protection. Place on a thermo-oscillating reactor and heat to 60°C for oscillating reaction for 1 hour, remove the supernatant, wash 3 times with ethanol, and then wash 5 times with water to obtain magnetic solid-phase extraction agent particles. Thermogravimetric analysis shows that there are 65% single The bulk material is coated with magnetic particles.

[0038] The magnetic solid phase extraction agent FT-IR test data that embodiment 1~3 obtains shows that 3300-3500cm -1 N-H stretching vibration...

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Abstract

The invention discloses a tannin guided copolymerization coated magnetic solid-phase extraction polyphenol adsorbent and a preparation method thereof. A particle is prepared through the steps of adsorbing a layer of tannin on the surface of a magnetic Fe3O4 nano particle, then adsorbing a layer of polymer monomer containing an amido bond on the surface of the particle adsorbing the tannin, then adding a cross-linking agent for polymerizing, and finally forming a polymer coated magnetic particle core-shell structure particle. The amido bond on the surface of the adsorbent has a preferential adsorption function on a phenolic substance, so that the phenolic substance in water can be selectively enriched and can be desorbed in ethyl alcohol. The adsorbent provided by the invention is magnetic,and is dispersed into a solution so as to be enriched by magnets conveniently and quickly. The tannin guided copolymerization coated magnetic solid-phase extraction polyphenol adsorbent provided by the invention is wide in raw material resource, low in price, simple and convenient in preparation process, and suitable for industrial production and application.

Description

technical field [0001] The invention belongs to the field of food and medicine processing, and in particular relates to a magnetic solid-phase extraction polyphenol adsorbent and a preparation method thereof. Background technique [0002] Polyphenols are a class of polyhydric phenolic substances widely present in plants. They are contained in the leaves, wood, skin, shell and pulp of plants, and the skins of fruits and grains contain high levels of plant polyphenols. Polyphenols have an excellent antioxidant effect, which is the basis of all their physiological activities. A large number of in vivo and in vitro experiments and epidemiological data show that eating a certain amount of plant polyphenols can prevent and inhibit cardiovascular diseases such as arteriosclerosis, coronary heart disease and stroke. Polyphenols have anti-inflammatory, anti-allergic and anti-viral effects. . With the rise of the current "pursuit of nature" consumption concept, polyphenols have bro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/281B01J20/30
CPCB01J20/26B01J20/28009B01J20/281B01J20/30B01J2220/80
Inventor 刘松柏蔡赫
Owner ZHEJIANG UNIV