Carboxymethyl chitosan-nano magnesium oxide composite membrane material and preparation method thereof

A technology of carboxymethyl chitosan and nano-magnesium oxide, applied in flexible coverings, packaging, wrapping paper, etc., can solve the problems of affecting economic benefits, less research, and long time for film preparation, and achieve broad application prospects , prolong shelf life and improve efficiency

Inactive Publication Date: 2020-09-11
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although many studies have been carried out on chitosan nanocomposite membrane materials with different types of nanofillers, magnesium oxide, as an additive with many advantages, has relatively little research on it as a nanofiller. The preparation method of the composite membrane used in these studies takes too long to prepare the membrane, which will also greatly affect the economic benefits of production

Method used

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  • Carboxymethyl chitosan-nano magnesium oxide composite membrane material and preparation method thereof
  • Carboxymethyl chitosan-nano magnesium oxide composite membrane material and preparation method thereof
  • Carboxymethyl chitosan-nano magnesium oxide composite membrane material and preparation method thereof

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Embodiment 1

[0030] For new food packaging materials, this example proposes a rapid preparation method of carboxymethyl chitosan-nano-magnesium oxide composite film. After dissolving carboxymethyl chitosan with magnetic stirring and obtaining a clarified dissolved product, add carboxymethyl chitosan Glycerin with 50-60% chitosan mass is mixed with different weights of nano-magnesia powder and ultrasonically obtained to obtain a film solution; spread it on a plastic plate and put it in an oven and dry it to form a film; then perform characterization and performance Determination. The carboxymethyl chitosan-nanometer magnesia composite film material that present embodiment makes has good physical and chemical properties (it has better and stable film-forming property at room temperature, possesses certain plasticity and elasticity), and preparation is simple and fast, and Compared with chitosan-metal oxide composite film, 18 hours of preparation time can be saved (see Figure 10 ), and has ...

Embodiment 2

[0044] refer to Figure 1-9 For illustration, this embodiment provides a kind of actual preparation carboxymethyl chitosan-nanometer magnesium oxide composite membrane material, comprises following actual preparation steps,

[0045] S1, the carboxymethyl chitosan powder that 0.5g weight-average molecular weight is 600,000 is dissolved in the 50mL aqueous solution, obtains the carboxymethyl chitosan solution that concentration is 10g / L;

[0046] S2, adding 0.25g of glycerol to the carboxymethyl chitosan solution obtained in step S1, and stirring to obtain a mixed solution;

[0047] S3. Slowly add 0.5 g of nano-magnesium oxide to the mixed solution in step S2 under stirring, and stir evenly to obtain a carboxymethyl chitosan-nano-magnesia mixed solution;

[0048] S4, cooling and drying the carboxymethyl chitosan-nanometer magnesium oxide mixture obtained in step S3 at a temperature of 60° C. for 24 hours to obtain a carboxymethyl chitosan-nanometer magnesium oxide composite mem...

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Abstract

The invention discloses a carboxymethyl chitosan-nano magnesium oxide composite membrane material and a preparation method thereof. The preparation method comprises the following steps: dissolving carboxymethyl chitosan powder in deionized water to obtain a carboxymethyl chitosan solution; adding glycerol into the carboxymethyl chitosan solution, and uniformly stirring and mixing the carboxymethylchitosan solution to obtain a mixed solution; slowly adding nano magnesium oxide powder into the mixed solution to obtain a carboxymethyl chitosan-magnesium oxide premixed solution; adding the stirred premixed solution into an ultrasonic crusher, and ultrasonically mixing the components uniformly until nano magnesium oxide is uniformly dispersed; and drying the mixture in a drying oven to obtainthe composite membrane. The carboxymethyl chitosan-nano magnesium oxide composite film material has the beneficial effects that the preparation efficiency can be greatly improved by a pre-stirring and ultrasonic method, the decay of food is inhibited by the relatively strong antibacterial property, and the shelf life of the food is prolonged, so that the carboxymethyl chitosan-nano magnesium oxide composite film material has a wide application prospect in the field of food fresh keeping and corrosion prevention.

Description

technical field [0001] The invention relates to the technical field of biology, in particular to a novel food packaging material carboxymethyl chitosan-nanometer magnesium oxide composite film and a rapid preparation method thereof. Background technique [0002] In recent years, biopolymeric materials have attracted increasing attention as an alternative to petroleum-based materials in the packaging industry due to their recyclability and biodegradability. In particular, chitosan and its derivatives are promising polymer matrices due to their unique properties such as non-toxicity, good film-forming properties, good biocompatibility, biodegradability, antibacterial activity. Carboxymethyl chitosan, a well-studied water-soluble chitosan derivative, is an important amphoteric polysaccharide in biopolymer matrices. Its main advantage is that it has higher water solubility under acidic or alkaline conditions, so it can be widely used in cosmetics, food preservation and medical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L5/08C08K3/22B65D65/46
CPCC08J5/18B65D65/466C08J2305/08C08K2201/011C08K2003/222
Inventor 王彦波傅玲琳陈剑岑丛楠李欢周瑾茹马爱进
Owner ZHEJIANG GONGSHANG UNIVERSITY
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