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A kind of preparation method and application of banana cellulose film

A cellulose film and banana technology, applied in the field of fresh-keeping packaging, can solve the problems of mechanical strength reduction, destruction of cellulose natural characteristics, poor film-forming properties, etc., and achieve good mechanical properties

Active Publication Date: 2019-01-08
HAIKOU EXPERIMENTAL STATION CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical methods are often used to modify cellulose into cellulose xanthate or copper amine complexes, and then regenerate to obtain regenerated cellulose. This method destroys the original natural characteristics of cellulose, resulting in a decrease in the degree of polymerization of the prepared regenerated cellulose. , the mechanical strength decreases, and the film-forming property is poor

Method used

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  • A kind of preparation method and application of banana cellulose film
  • A kind of preparation method and application of banana cellulose film
  • A kind of preparation method and application of banana cellulose film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method for banana cellulose film, comprising the following steps:

[0026] (1) Banana stalks are scraped to obtain banana stalk fibers, cut, add 1.2g / L H 2 SO 4 After the solution is heated in a water bath, the solid-to-liquid weight ratio of the banana stalk fiber to sulfuric acid is 1:16, the water bath heating temperature is 47°C, the water bath heating time is 1.8h, and the banana stalk fiber is washed with water until the pH is neutral;

[0027] (2) Place the banana stalk fiber treated in step (1) in a 156g / L NaOH solution and then heat it in a water bath. The temperature of the water bath heating is 27° C., and the water bath heating time is 1 h. Wash it with water until the pH is neutral. Obtain alkalized fiber and dry it for later use;

[0028] (3) Add the dried alkalized fiber into the ionic liquid of 1-allyl-3-methylimidazolium chloride salt, stir and heat to dissolve, the stirring speed is 180r / min, the dissolution temperature is 86°C, and the...

Embodiment 2

[0032] A preparation method for banana cellulose film, comprising the following steps:

[0033] (1) Banana stalks are scraped to obtain banana stalk fibers, cut, add 2.8g / L H 2 SO 4 After the solution is heated in a water bath, the solid-to-liquid weight ratio of the banana stem fibers to sulfuric acid is 1:23, the water bath heating temperature is 52°C, the water bath heating time is 2.2h, and the banana stem fibers are washed with water until the pH is neutral;

[0034] (2) Put the banana stalk fiber treated in step (1) in 246g / L NaOH solution and then heat it in a water bath. , to obtain alkalized fibers, and dry them for later use;

[0035] (3) Add the dried alkalized fiber into the ionic liquid of 1-allyl-3-methylimidazolium chloride salt, stir and heat to dissolve, the stirring speed is 220r / min, the dissolution temperature is 100°C, and the dissolution time is 3.5h , the solution was poured evenly on a glass plate, and quickly scraped with a film applicator to form a...

Embodiment 3

[0039] A preparation method for banana cellulose film, comprising the following steps:

[0040] (1) Banana stalks are scraped to obtain banana stalk fibers, cut, add 2.4g / L H 2 SO 4 After the solution is heated in a water bath, the solid-to-liquid weight ratio of the banana stem fibers to sulfuric acid is 1:22, the water bath heating temperature is 52°C, the water bath heating time is 2.0h, and the banana stem fibers are washed with water until the pH is neutral;

[0041] (2) Put the banana stalk fiber treated in step (1) in 210g / L NaOH solution and then heat it in a water bath. , to obtain alkalized fibers, and dry them for later use;

[0042] (3) Add the dried alkalized fiber into the ionic liquid of 1-allyl-3-methylimidazolium chloride salt, stir and heat to dissolve, the stirring speed is 200r / min, the dissolution temperature is 93°C, and the dissolution time is 3.2h , the solution was poured evenly on a glass plate, and quickly scraped with a film applicator to form a ...

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Abstract

The invention provides a preparation method and application of a banana cellulose film. A banana stalk fiber is firstly subjected to acid and alkali treatment; afterwards, cellulose is dissolved and modified by utilizing ionic liquid; subsequently, a regenerated cellulose film is obtained through a series of preparation processes of washing with a mixed solution, and the like. The dissolution of the cellulose by the ionic liquid belongs to physical dissolution; the natural characteristic of the cellulose is better maintained and the film is enabled to have favorable mechanical performance, biodegradability and fruit preservation effect.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping packaging, in particular to a preparation method and application of a banana cellulose film. Background technique [0002] In recent years, with the continuous improvement of people's awareness of environmental protection and the higher and higher requirements for food quality, biodegradable green packaging materials have been widely concerned. The massive and excessive use of traditional plastic fresh-keeping packaging materials has brought about serious "white pollution", while cellulose-based materials are biodegradable, renewable, and biosafety. The alternative materials for cellulose-based fruit fresh-keeping packaging The development is in line with the development trend of environmental protection and green packaging materials. Fruit fresh-keeping packaging materials are required to have good moisture retention, mechanical strength, heat and mass transfer properties, etc. During the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J3/11D06M11/38B65D65/46D06M101/06C08L1/02
CPCB65D65/466B65D2565/388C08J3/11C08J5/18C08J2301/02D06M11/38D06M2101/06Y02A40/90Y02W90/10
Inventor 艾斌凌盛占武郑丽丽郑晓燕金志强王必尊
Owner HAIKOU EXPERIMENTAL STATION CHINESE ACAD OF TROPICAL AGRI SCI
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