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Polysaccharide nanofilm and preparation method thereof

A nano-membrane and polysaccharide technology, which is applied in the manufacture of rayon, textiles and paper, and conjugated synthetic polymer artificial filaments. It can solve the problems of poor fresh-keeping effect of nano-membranes, reduced antibacterial and anti-oxidative effects, and poor film-forming properties. problems, to achieve the effect of improving antibacterial, anti-corrosion, fresh-keeping and anti-oxidation effects, promoting comprehensive development and utilization, and delaying oxidative decomposition

Inactive Publication Date: 2021-12-07
XIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, some nano-membranes have been used in food preservation, but there are problems such as single film-making components, complicated film-making technology, poor fresh-keeping effect of nano-membranes, and high cost.
Polysaccharide nanofilms prepared with the above raw materials and technologies will affect the flavor of food, and organic acids will react with plant essential oils to reduce their respective antibacterial and antioxidant effects. Chitosan and polysaccharides cannot be completely dissolved and mixed, resulting in poor film-forming properties.

Method used

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  • Polysaccharide nanofilm and preparation method thereof
  • Polysaccharide nanofilm and preparation method thereof

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preparation example Construction

[0045] The invention provides a polysaccharide nano-membrane based on plant essential oils combined with organic acids and a preparation method thereof, wherein the preparation method comprises:

[0046] Preparation of plant essential oil / cyclodextrin inclusion compound: mix plant essential oil with cyclodextrin aqueous solution, and precipitate crystals to obtain plant essential oil / cyclodextrin inclusion compound;

[0047] Preparation of the first spinning solution: mixing the chitosan acetic acid aqueous solution and the polysaccharide to form a first mixture, mixing the first mixture with the spinning solution to obtain the first spinning solution;

[0048] Preparation of the second spinning solution: mixing an organic acid as a functional additive raw material with the first spinning solution to obtain a second spinning solution;

[0049] Preparation of nano-membrane: the second spinning solution is mixed with plant essential oil / cyclodextrin inclusion compound, and the n...

Embodiment 1

[0066] A polysaccharide nanofilm

[0067] Add 19g of cyclodextrin to 1kg of double-distilled water at 45°C to prepare cyclodextrin aqueous solution; take 1kg of cyclodextrin aqueous solution and 0.05kg of plant essential oil and mix (the mixing method adopts constant temperature stirring, and the temperature of stirring is 40 ℃, the time of stirring is 2h), crystals are precipitated at a temperature of 2 ℃, after the crystals are precipitated, suction filtration is obtained, and the filter residue is freeze-dried to obtain the plant essential oil / cyclodextrin inclusion complex; polyvinyl alcohol and Water was mixed under a water bath at 75°C at a volume ratio of 1:10 to obtain a spinning solution; chitosan was mixed with 2% acetic acid aqueous solution at a volume ratio of 1:40, and stirred electrically until dissolved (the chitosan The mass concentration of acetic acid aqueous solution is 2.5%), obtains chitosan acetic acid aqueous solution; Said chitosan acetic acid aqueous ...

Embodiment 2

[0069] A polysaccharide nanofilm

[0070] Add 19g of cyclodextrin to 1kg of double-distilled water at 50°C to prepare cyclodextrin aqueous solution; take 1kg of cyclodextrin aqueous solution and 0.1kg of plant essential oil and mix (the mixing method adopts constant temperature stirring, and the temperature of stirring is 50 ℃, the time of stirring is 2.5h), crystals are precipitated at a temperature of 4 ℃, after the crystals are precipitated, they are suction filtered, and the filter residue is freeze-dried to obtain the plant essential oil / cyclodextrin inclusion complex; the polyvinyl alcohol Mix with water at a volume ratio of 1:12 under a water bath at 80°C to obtain a spinning solution; mix chitosan with 2% acetic acid aqueous solution at a volume ratio of 1:60, and stir until dissolved (the chitosan The mass concentration of sugar acetic acid aqueous solution is 1.7%), obtains chitosan acetic acid aqueous solution, the chitosan acetic acid aqueous solution and the polys...

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Abstract

The invention provides a polysaccharide nanofilm based on combination of plant essential oil and organic acid and a preparation method of the polysaccharide nanofilm. The preparation method comprises the following steps of mixing the plant essential oil with a cyclodextrin aqueous solution to obtain a plant essential oil / cyclodextrin inclusion compound; mixing polysaccharide with a chitosan acetic acid aqueous solution to obtain a first mixture; mixing the obtained first mixture with a spinning solution to obtain a first spinning solution; mixing organic acid serving as a functional material with the first spinning solution to obtain a second spinning solution; and mixing the second spinning solution with the plant essential oil / cyclodextrin inclusion compound to obtain a third spinning solution, and preparing the nanofilm by adopting an electrostatic spinning technology. The prepared nanofilm has excellent antibacterial and antioxidant properties, can be applied to food preservation, and can effectively prevent microbial contamination, slow down oxidative decomposition of fat protein, prolong the shelf life of food and improve the sensory properties of the food.

Description

technical field [0001] The invention belongs to the field of nano-membrane preparation, and discloses a preparation method of polysaccharide nano-membrane and the polysaccharide nano-membrane prepared by the preparation method. Background technique [0002] Plant essential oil is an aromatic oily liquid extracted from plants, which has the characteristics of non-toxic, harmless, broad-spectrum antibacterial and anti-oxidation. Plant essential oils have a certain inhibitory effect on bacteria, fungi, and molds that cause food spoilage. The antibacterial mechanism is mainly because the hydrophobic components of essential oils combine with microbial cell membranes to increase the fluidity of cell membranes, resulting in destruction of their structures. Internal ions and content seep out, eventually cell death, followed by the impact on microbial metabolism and proliferation and the effect on microbial nucleic acid; and the hydrophobicity of plant essential oils can improve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/10D01F1/10D04H1/4309D04H1/4382D04H1/728
CPCD01F8/18D01F8/10D01F1/103D01F1/10D04H1/728D04H1/43838D04H1/4309
Inventor 马嫄刘萍袁安琪叶坤月陈媛媛孟爱莲杨万里
Owner XIHUA UNIV
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