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Preparation method of lignocellulose composite material for adsorbing plant polyphenol

A technology of lignocellulose and composite materials, which is applied in the field of natural polymer adsorption materials, can solve the problems of being unsuitable for food additives, achieve good physical stability, improve adsorption capacity, and not easily swell

Inactive Publication Date: 2015-03-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, macroporous adsorption resins are mainly made of styrene, divinylbenzene, etc., and a certain proportion of porogens (toluene, xylene, etc.) Fragments, the resin itself will be gradually dissolved during use, and these residues are easy to be brought into the product, so its safety issues in the separation and preparation of food functional components have always been concerned
However, this modification basically uses chemical crosslinking agents, which are not suitable for the production of food additives

Method used

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  • Preparation method of lignocellulose composite material for adsorbing plant polyphenol
  • Preparation method of lignocellulose composite material for adsorbing plant polyphenol
  • Preparation method of lignocellulose composite material for adsorbing plant polyphenol

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Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1, a kind of lignocellulose composite material preparation method that is used for plant polyphenol adsorption, carries out the following steps successively:

[0039] 1), weigh 0.5g of chitosan, add 5ml of water (just to submerge the chitosan), add dropwise glacial acetic acid (about 0.1ml) until the chitosan dissolves, and obtain a chitosan solution;

[0040] 2), weigh 0.25g of gelatin, add 5ml of distilled water, and heat until the gelatin melts to obtain a gelatin solution;

[0041] 3) Pour the gelatin solution into the chitosan solution, then add 1g of lignocellulose, stir evenly, freeze-dry (dry at -50°C for 24h), disperse (particle size 1-2mm), heat treatment at 80°C 2h.

Embodiment 2

[0043] Embodiment 2, a kind of lignocellulose composite material preparation method for plant polyphenol adsorption, carries out the following steps in sequence:

[0044] 1), take by weighing 1.13g chitosan, add water 11ml (just submerge chitosan), add dropwise glacial acetic acid (0.2ml) until chitosan dissolves;, obtain chitosan solution;

[0045] 2), weigh 2.75g of gelatin, add 10ml of distilled water, and heat until the gelatin melts to obtain a gelatin solution;

[0046] 3) Pour the gelatin solution into the chitosan solution, then add 1g of lignocellulose, stir evenly, freeze-dry (dry at -50°C for 24h), disperse (particle size 1-2mm), heat treatment at 80°C 2h.

[0047] The polyphenol adsorption capacity of the obtained material was 167.54 mg g -1 .

Embodiment 3

[0048] Embodiment 3, a kind of lignocellulose composite material preparation method for plant polyphenol adsorption, the following steps are carried out in sequence:

[0049] 1), weigh 2g of chitosan, add 20ml of water (just to submerge the chitosan), add dropwise glacial acetic acid (about 0.4ml) until the chitosan dissolves, and obtain a chitosan solution;

[0050]2), weigh 5g of gelatin, add 20ml of distilled water, and heat until the gelatin melts to obtain a gelatin solution;

[0051] 3) Pour the gelatin solution into the chitosan solution, then add 1g of lignocellulose, stir evenly, freeze-dry (dry at -50°C for 24h), disperse (particle size 1-2mm), and heat-treat at 80°C 2h.

[0052] The polyphenol adsorption capacity of the obtained material was 171.44 mg g -1 .

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Abstract

The invention discloses a preparation method of a lignocellulose composite material for adsorbing plant polyphenol. The preparation method comprises the following steps: (1). weighing 0.5-4.68g of chitosan, adding with water, dropwise adding glacial acetic acid until the chitosan is dissolved to obtain chitosan solution; (2) weighing gelatin with the weight of 0.4-2.5 times of the weight of the chitosan, adding distilled water in the gelatin, and heating until the gelatin is molten to obtain gelatin solution; and (3) pouring the gelatin solution into the chitosan solution, adding with 1g of lignocellulose, stirring uniformly, freezing, drying, dispersing, and carrying out heat treatment at 80-140 DEG C for 1.5-2.5h, thereby obtaining the lignocellulose composite material for adsorbing plant polyphenol. The material prepared by the method has high adsorption capacity for tea polyphenol.

Description

technical field [0001] The invention relates to a natural polymer adsorption material used for the adsorption and separation of plant polyphenols, which is suitable for the adsorption and separation of plant polyphenols such as tea polyphenols. Background technique [0002] Adsorption separation is an important means for the separation and purification of plant polyphenols, and macroporous adsorption resins are commonly used as adsorption materials in industry. However, macroporous adsorption resins are mainly made of styrene, divinylbenzene, etc., and a certain proportion of porogens (toluene, xylene, etc.) Fragments, the resin itself will be gradually dissolved during use, and these residues are easy to be brought into the product, so its safety issues in the separation and preparation of food functional components have always been concerned. From the perspective of food safety, it is of great significance to develop new efficient and safe adsorption and separation materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/24B01J20/3078B01J2220/44B01J2220/4812
Inventor 唐德松金逸群汤一
Owner ZHEJIANG UNIV
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