Preparation method of hydrophobic antibacterial nano-regenerated cellulose film

A technology of regenerated cellulose film and cellulose, which is applied in the field of preparation of hydrophobic antibacterial nano-regenerated cellulose film, can solve problems such as limiting the scope of application, and achieve the effect of good hydrophobicity and high tensile strength

Inactive Publication Date: 2019-06-04
韩振
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the characteristic of cellulose as a strongly hydrophilic substance greatly limits its application range, so the hydrophobic modification of nanocellulose materials can expand the application range and application environment of nanocellulose fibrils

Method used

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  • Preparation method of hydrophobic antibacterial nano-regenerated cellulose film

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Embodiment 1

[0021] A method for preparing a hydrophobic antibacterial nanometer regenerated cellulose film, characterized in that it comprises the following steps, and the following raw materials are by weight:

[0022] (1) Oxidation method of corn stalk cellulose:

[0023] Disperse 10 parts of corn stalk cellulose in acetate buffer solution at a ratio of 1:100, add 8 parts of sodium chlorite, 1 part of tetramethylpiperidine oxide, and 1 part of sodium hypochlorite solution, stir at 40 ° C for 12 h, and then Add 8 parts of sodium chlorite and 1 part of sodium hypochlorite solution, and stir at 40°C for 24 hours to obtain oxidized corn stover cellulose;

[0024] Among them, the preparation of corn stalk cellulose: wash 20 parts of corn stalks, dry them, crush them, and sieve them, immerse the corn stalk powder in 1% acetic acid acidified sodium chlorite solution, stir in a water bath at 70°C for 6 hours Afterwards, centrifuge and wash, soak the precipitate in 5% sodium hydroxide solution ...

Embodiment 2

[0033] A method for preparing a hydrophobic antibacterial nanometer regenerated cellulose film, characterized in that it comprises the following steps, and the following raw materials are by weight:

[0034] (1) Oxidation method of corn stalk cellulose:

[0035] Disperse 20 parts of corn stalk cellulose 1:100 in acetate buffer solution, add 9 parts of sodium chlorite, 2 parts of tetramethylpiperidine oxide, and 2 parts of sodium hypochlorite solution, stir at 45 ° C for 10 h, and then Add 9 parts of sodium chlorite and 2 parts of sodium hypochlorite solution, and stir at 45°C for 20 hours to obtain oxidized corn stover cellulose;

[0036] Among them, the preparation of corn stalk cellulose: 40 parts of corn stalks were washed, dried, crushed, and sieved, and the corn stalk powder was immersed in 2% acetic acid acidified sodium chlorite solution, and stirred in a water bath at 80°C for 4 hours. Afterwards, centrifuge and wash, soak the precipitate with 5% sodium hydroxide solu...

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Abstract

The invention discloses a preparation method of a hydrophobic antibacterial nano-regenerated cellulose film, and the preparation method comprises: dispersing corn straw cellulose in an acetate buffersolution, adding sodium chlorite, tetramethyl piperidine oxide and a sodium hypochlorite solution, stirring, then adding sodium chlorite and a sodium hypochlorite solution, and stirring to obtain oxidized corn straw cellulose; dispersing the oxidized corn straw cellulose in deionized water, carrying out ultrasonic treatment and homogenizing in an ice water bath to obtain a nano-cellulose fiber filament dispersion liquid, adding N,N-dimethylacetamide, under a nitrogen atmosphere, stirring in an oil bath, cooling, adding lithium chloride, stirring, dissolving, spreading the mixture on a siliconwafer, drying to obtain a thin film, and cleaning and drying the thin film to obtain a nano regenerated cellulose film; and soaking the film in an octadecyl trichlorosilane and n-hexane solution, carrying out hydrophobic modification, taking the film out and washing the film with n-hexane, carrying out vacuum drying to obtain a hydrophobic modified nano-regenerated cellulose film, soaking the hydrophobic modified nano-regenerated cellulose film into an antibacterial extracting solution of Dioscorea cirrhosa, heating, finishing, washing with water and airing to obtain the hydrophobic antibacterial nano-regenerated cellulose film.

Description

technical field [0001] The invention belongs to the field of polymer membranes, and in particular relates to a method for preparing a hydrophobic and antibacterial nanometer regenerated cellulose membrane. Background technique [0002] Nanocellulose material is a new type of nano-scale biodegradable material with high specific surface area, high Young's modulus, high adsorption performance and high reactivity. It is a kind of nanocellulose material with high aspect ratio in the crystalline region. Nanocellulose films and aerogels prepared from nanocellulose fibrils are widely used in chemical industry, materials, food, medicine and other fields. prospect. In order to reduce the large amount of energy consumed by purely mechanical preparation, the preparation of nanocellulose fibrils is mostly prepared by chemical pretreatment combined with mechanical methods at this stage. The effect is a hot research content at this stage. Moreover, the characteristic of cellulose as a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J5/18C08B15/02C08L1/04
Inventor 韩振
Owner 韩振
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