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Protein/polysaccharide composite membrane material with tea polyphenol cross-linked and embedded nano cerium oxide and preparation method of protein/polysaccharide composite membrane material

A composite technology of nano-cerium oxide and polysaccharide, applied in the field of nano-materials, can solve the problems of high equipment requirements and high cost, and achieve the effects of good mechanical properties, solving cytotoxicity and excellent ultraviolet protection effect.

Pending Publication Date: 2022-04-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other methods for synthesizing nano-cerium oxide, such as alcohol thermal method, hydrothermal method, precipitation method, sol-gel method, and spray pyrolysis method, their disadvantages are that the required pressure, temperature, and equipment requirements are very high. higher cost

Method used

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  • Protein/polysaccharide composite membrane material with tea polyphenol cross-linked and embedded nano cerium oxide and preparation method of protein/polysaccharide composite membrane material
  • Protein/polysaccharide composite membrane material with tea polyphenol cross-linked and embedded nano cerium oxide and preparation method of protein/polysaccharide composite membrane material
  • Protein/polysaccharide composite membrane material with tea polyphenol cross-linked and embedded nano cerium oxide and preparation method of protein/polysaccharide composite membrane material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 500 mg of zein in 50 ml of 75% ethanol solution at 60°C, heat and reflux and stir for 20 minutes, weigh 100 mg of fucoidan into the solution, continue heating and reflux and stir for 20 minutes to obtain blend A;

[0031] (2) Add 100 mg of cerium nitrate hexahydrate, 120 mg of urea, and 1.8 g of PVP to the blend A in sequence to adjust the pH to 8-9, and heat and reflux to stir;

[0032] (3) Add 0.4% tea polyphenols (w / w, zein / TP), 100 μL glycerol and 100 μL Tween to the reaction solution, and continue heating and stirring for 30 minutes;

[0033] (4) Filtrate the obtained mixed solution under reduced pressure to obtain a film-forming solution, spread it evenly on an acrylic plate, and dry it in vacuum at 60°C for 18 hours to obtain a protein / polysaccharide composite film with tea polyphenols cross-linked and embedded in nano-cerium oxide Material-1.

Embodiment 2

[0035] (1) Dissolve 500 mg of zein in 50 ml of 75% ethanol solution at 60°C, heat and reflux and stir for 20 minutes, weigh 100 mg of fucoidan into the solution, continue heating and reflux and stir for 20 minutes to obtain blend A;

[0036] (2) Add 100 mg of cerium nitrate hexahydrate, 120 mg of urea, and 1.8 g of PVP to the blend A in sequence to adjust the pH to 8-9, and heat and reflux to stir;

[0037] (3) Add 0.8% tea polyphenols (w / w, zein / TP), 100 μL glycerol and 100 μL Tween to the reaction solution, and continue heating and stirring for 30 minutes;

[0038] (4) Filtrate the obtained mixed solution under reduced pressure to obtain a film-forming solution, spread it evenly on an acrylic plate, and dry it in vacuum at 60°C for 18 hours to obtain a protein / polysaccharide composite film with tea polyphenols cross-linked and embedded in nano-cerium oxide Material-2.

Embodiment 3

[0040] (1) Dissolve 500 mg of zein in 50 ml of 75% ethanol solution at 60°C, heat and reflux and stir for 20 minutes, weigh 100 mg of fucoidan into the solution, continue heating and reflux and stir for 20 minutes to obtain blend A;

[0041] (2) Add 100 mg of cerium nitrate hexahydrate, 120 mg of urea, and 1.8 g of PVP to the blend A in sequence to adjust the pH to 8-9, and heat and reflux to stir;

[0042] (3) Add 1.2% tea polyphenols (W / W, zein / TP), 100 μL glycerol and 100 μL Tween to the reaction solution, and continue heating and stirring for 30 minutes;

[0043] (4) Filtrate the obtained mixed solution under reduced pressure to obtain a film-forming solution, spread it evenly on an acrylic plate, and dry it in vacuum at 60°C for 18 hours to obtain a protein / polysaccharide composite film with tea polyphenols cross-linked and embedded in nano-cerium oxide Material-3.

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Abstract

The invention discloses a protein / polysaccharide composite membrane material with tea polyphenol crosslinked and embedded into nano cerium oxide and a preparation method of the protein / polysaccharide composite membrane material. Protein and polysaccharide are used as main membrane matrixes, tea polyphenol (TP) is used as a phenolic cross-linking agent, and nano cerium oxide synthesized in situ is embedded into the composite membrane, so that the tea polyphenol cross-linked protein / polysaccharide composite membrane loaded with nano cerium oxide is obtained. The preparation method and technology [1] are as follows: (1) blending a protein solution and polysaccharide to obtain a mixed solution A; (2) adding a raw material for in-situ synthesis of nano cerium oxide into the blended solution A, adjusting the pH value, and heating, refluxing and stirring; and (3) adding tea polyphenol and a plasticizer, heating and stirring, filtering under reduced pressure, and drying under vacuum to obtain the composite film. The composite film has good mechanical property, water insolubility, antibacterial property, oxidation resistance, strong ultraviolet protection capability and excellent biocompatibility, and can play a greater practical value in the fields of coatings, cosmetics, food packaging and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials. The invention relates to a preparation method of a protein / polysaccharide composite membrane material in which tea polyphenols are cross-linked and embedded in nanometer cerium oxide. Background technique [0002] Tea polyphenols: Tea polyphenols (TP) extracted from tea is a safe and non-toxic green compound. Flavonols, phenolic acids and anthocyanins, etc. The catechins in TP are mainly gallocatechin gallate (EGCG), gallocatechin gallate (EGC), gallate catechin (ECG) and catechin (EC), tea polyphenols have been widely Research to show its good antioxidant and antibacterial activity. Formation of crosslinks between biopolymers such as polysaccharides and / or proteins enhances the functional properties of edible films. Tea polyphenols have considerable potential to improve film properties, especially their antioxidant activity. [0003] Cerium oxide is one of the most active rare e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08L5/00C08L5/04C08K3/22C08K5/1545C08J5/18
Inventor 魏坤刘媛琪郑芳
Owner SOUTH CHINA UNIV OF TECH
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