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High-strength super-macroporous separating medium for plant polyphenols extraction and preparation method thereof

A separation medium and plant polyphenol technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problems that affect the separation medium reuse, poor mechanical properties, etc., and achieve non-toxic Effects of side effects, fast flow, and simple method

Active Publication Date: 2014-03-26
LIMING VOCATIONAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure CTS cross-linked products have extremely poor mechanical properties during use, which affects the reuse of separation media

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve PVA with an average polymer degree of 2000 in hot water, select formaldehyde as a crosslinking agent, use sulfuric acid as a catalyst, use deionized water as a solvent, control the mass fractions of PVA and formaldehyde to 15% and 0.5% respectively, and stir After uniformity, put it in a freezer to cool down to about 0°C, add 0.5ml of sulfuric acid solution with a concentration of 20%, and then pour the mixed solution into a chromatographic column with a diameter of 16mm and a length of 200mm. Lower the temperature from 0°C to -18°C within 1 hour, the system freezes and ice crystals appear, and maintain at -18°C for 12 hours, take out the chromatographic column and thaw it at room temperature, and then wash the bed with 6BV volume of deionized water to remove the non-involved The reacted substances obtain the PVA super-large-pore scaffold.

[0020]Dissolve CTS with a deacetylation degree of 85% in 2% acetic acid solution, select N,N'-methylenebisacrylamide as a...

Embodiment 2

[0024] Dissolve PVA with a polymer degree of 2000 in hot water at 90°C, use glyoxal as a crosslinking agent, use sulfuric acid as a catalyst, and use deionized water as a solvent to control the mass fractions of PVA and glyoxal to 12% respectively and 0.5%, stir evenly and put it in a freezer to cool down to about 0°C, add 0.5ml of sulfuric acid solution with a concentration of 20%, and then pour the mixture into a chromatographic column with a diameter of 16mm and a length of 200mm. Decrease the temperature from 0°C to -20°C within 1h, freeze and crystallize the system, and keep it at -20°C for 15h, then take out the chromatographic column and thaw it at room temperature, then wash the bed layer with 6BV volume of deionized water to remove the non-participating reaction The material obtains the PVA super-large-pore stent.

[0025] Dissolve CTS with a deacetylation degree of 90% in 2% acetic acid solution, select N,N'-methylenebisacrylamide as a crosslinking agent, and use pot...

Embodiment 3

[0029] Dissolve PVA with a polymer degree of 2600 in hot water at 95°C, use glutaraldehyde as a crosslinking agent, use hydrochloric acid as a catalyst, and use deionized water as a solvent to control the mass fractions of PVA and glutaraldehyde to 12% respectively and 1.2%, stir evenly and put it in a freezer to cool down to about 0°C, add 0.5ml of 15% hydrochloric acid solution, and pour the mixture into a chromatographic column with a diameter of 12mm and a length of 200mm. Decrease the temperature from 0°C to -18°C within 1 hour, freeze and crystallize the system, and maintain it at -18°C for 12 hours, then take out the chromatographic column and thaw it at room temperature, then wash the bed with 5BV of deionized water to remove those not involved in the reaction The material obtains the PVA super-large-pore stent.

[0030] Dissolve CTS with a deacetylation degree of 90% in 2% acetic acid solution, select N,N'-methylenebisacrylamide as a crosslinking agent, and use potass...

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Abstract

The invention discloses a high-strength super-macroporous separating medium for plant polyphenols extraction. The separating medium is wholly molded in a separation column, has amino functional groups, compression strength of 5-10 MPa, porosity of 60-90%, and pore size of 10-500 microns; the holes are continuously formed in the medium. When prepared, a polyvinyl alcohol water solution is mixed with a crosslinking agent; the mixture is added with a catalyst and then gradually cooled and frozen; after crystallization and crosslinking reaction, the crystals are taken out and thawed to form a super-macroporous PVA (polyvinyl acetate) crosslinking support; a chitosan acid solution, the crosslinking agent and an initiator are used to substitute water in the support; after crystallization and chitosan crosslinking reaction, the substance is thawed to form a super-macroporous PVA-CTS (polyvinyl acetate-chitosan) dual-network crosslinking continuous bed; the continuous bed is reacted with the amino to generate the super-macroporous separating medium with the amino functional groups. The separating medium can be widely applied to extraction of the plant polyphenols, and further can be used as an adsorbing separating medium for wastewater treatment field of heavy metals and anionic dye and the like.

Description

technical field [0001] The invention relates to a high-strength super-macroporous separation medium for extracting plant polyphenols and a preparation method thereof, belonging to the technical field of preparation of functional polymer materials and their application. Background technique [0002] Plant polyphenols are active substances extracted from plants that contain multiple phenolic hydroxyl groups and have wide application value, such as tea polyphenols, grape polyphenols, apple polyphenols, etc. Taking tea polyphenols as an example, it mainly includes catechins, flavonoids, flavanols, and phenolic acids. It is a natural antioxidant and has been widely used in the food industry, medicine, and fine chemicals. Therefore, the extraction and purification of plant polyphenols has always been a research hotspot. The resin adsorption method for extracting polyphenols mainly uses resin to enrich the plant polyphenols in the treatment solution through a certain adsorption me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
Inventor 李大刚张青海袁淑芳陈汝盼
Owner LIMING VOCATIONAL UNIV
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