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A kind of bagasse-based nano antibacterial fresh-keeping film and preparation method thereof
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A fresh-keeping film and bagasse technology is applied in the field of bagasse-based nano antibacterial fresh-keeping film and its preparation, which can solve the problems of no antibacterial and poor fiber film effect, and achieve the effects of increasing hydrophilicity, low cost and reducing pollution.
Active Publication Date: 2020-11-03
GUANGXI UNIV
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[0005] The Chinese patent application number 201310359396.4 discloses a preparation method of bagasse cellulose nanofiber membrane, which realizes waste resource utilization and effective recycling, which not only helps to reduce environmental pollution, but also contributes to the high value of bagasse However, the prepared fiber film is less effective for preserving fruits and has no antibacterial effect
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Embodiment 1
[0038] A bagasse-based nano antibacterial fresh-keeping film comprising the following components according to weight percentage:
[0040] The chitin nano whisker has a diameter of 40 nm.
[0041] A method for preparing bagasse-based nano antibacterial fresh-keeping film includes the following steps:
[0042] S1. Preparation of chitin nanowhiskers:
[0043] Weigh chitin, disperse it in 10mol / L hydrochloric acid, bath ratio is 1:10, react at 55℃ until the solution is completely transparent to obtain a mixed solution, pour the mixed solution into 3 times deionized water, centrifuge at 9000 rpm 10min, then repeated centrifugation twice, and then dried to obtain chitin nanowhiskers.
[0044] S2. Preparation of bagasse nanocellulose:
[0045] The bagasse was stirred and reacted with a NaOH aqueous solution with a mass fraction of 10% and a tempera...
Embodiment 2
[0051] A bagasse-based nano antibacterial fresh-keeping film comprising the following components according to weight percentage:
[0058] The chitin nano whisker has a diameter of 40 nm.
[0059] The preparation method is the same as in Example 1.
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Abstract
The invention provides a bagasse-based nano antibacterial fresh-keeping film and a preparation method thereof, and relates to the field of crop straw utilization. The bagasse-based nano antibacterialfresh-keeping film comprises the following components in percentages by weight: 60%-80% of bagasse nanocellulose, 10%-30% of chitin nano crystal whiskers, 1%-5% of cinnamon essential oil, 3%-10% of chitosan, 1%-3% of glycerin, and 1%-3% of sorbitan fatty acid ester. The invention also discloses the preparation method of the bagasse-based nano antibacterial fresh-keeping film. According to the method provided by the invention, the nano antibacterial fresh-keeping film prepared by the method has better strength and gas permeability, the surface of the film can be uniformly moistened and forms awater film, so that external microorganisms are prevented from entering the film; and the added cinnamon essential oil and chitosan can inhibit growth and reproduction of microorganisms, so that shelflife of fruits is prolonged.
Description
Technical field [0001] The invention relates to the field of biomass reuse, in particular to a bagasse-based nano antibacterial fresh-keeping film and a preparation method thereof. Background technique [0002] Fruit production has a strong seasonal and regional nature. In order to meet consumer demand for fruits, it is necessary to improve the preservation technology of fruits and extend the market cycle of fresh fruits. However, fresh fruits still have higher physiological activity after harvest, especially fruits with higher moisture content are more prone to decay and deterioration, so prolonging the storage and transportation preservation time becomes the key to the preservation and appreciation of fresh fruits. [0003] At present, the commonly used fruit preservation technologies mainly include low-temperature storage, modified atmosphere preservation, and the addition of chemical preservatives. However, these technologies have certain limitations in practical applications....
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