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A kind of preparation method of cellulose acetate-based hybrid film

A technology of cellulose acetate and silver nitrate, applied in chemical instruments and methods, special treatment targets, coatings, etc., can solve the problems of poor mechanical properties, lack of practical value, and poor mechanical properties of pure silk fibroin solution, and achieve antibacterial Excellent effect, low equipment requirements, and good stability

Active Publication Date: 2020-12-08
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure silk fibroin solution has poor mechanical properties after being made into a material, and is brittle in a dry state, with poor mechanical properties and lack of practical value.

Method used

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  • A kind of preparation method of cellulose acetate-based hybrid film
  • A kind of preparation method of cellulose acetate-based hybrid film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] One of the embodiments of the preparation method of a cellulose acetate-based hybrid membrane of the present invention comprises the following steps:

[0045] (1) Preparation of cellulose acetate solution: Weigh 9g of cellulose acetate particles and 90g of N,N-dimethylformamide in the ratio of 1:10 to add cellulose acetate and N,N-dimethylformamide to the reaction In the container, stir at a constant temperature at 25°C for 8 hours, and after the cellulose acetate particles are completely dissolved, a cellulose acetate solution with a mass fraction of 9.1% is obtained;

[0046] (2) Prepare the mixed solution: add silk fibroin powder with a particle size of 5 μm and a solid content of 62% to the above cellulose acetate solution, stir with a high-speed stirrer for 30 minutes, and then let it stand for 30 minutes to defoam, to obtain mixed solution;

[0047] (3) Preparation of cellulose acetate / silk fibroin hybrid film: Coat the mixed solution on a release paper with a th...

Embodiment 2

[0052] One of the embodiments of the preparation method of a cellulose acetate-based hybrid membrane of the present invention comprises the following steps:

[0053] (1) Preparation of cellulose acetate solution: Weigh 8g of cellulose acetate particles and 80g of N,N-dimethylacetamide into the reaction according to the ratio of 1:8 of cellulose acetate and N,N-dimethylacetamide In the container, heat and stir at 40°C for 8 hours. After the cellulose acetate particles are completely dissolved, a cellulose acetate solution with a mass fraction of 11.1% is obtained;

[0054] (2) Prepare the mixed solution: add silk fibroin powder with a particle size of 5 μm and a solid content of 65% to the above cellulose acetate solution, and then use a high-speed stirrer to stir for 30 minutes to obtain a well-mixed organic-inorganic mixture solution, left to defoam for 30 minutes to obtain a mixed solution;

[0055] (3) Preparation of cellulose acetate / silk fibroin hybrid film: Coat the mix...

Embodiment 3

[0060] One of the embodiments of the preparation method of a cellulose acetate-based hybrid membrane of the present invention comprises the following steps:

[0061] (1) Preparation of cellulose acetate solution: Weigh 10g of cellulose acetate particles and 65g of N,N-dimethylformamide into the reaction In the container, heat and stir at 45°C for 8 hours. After the cellulose acetate particles are completely dissolved, a cellulose acetate solution with a mass fraction of 13.3% is obtained;

[0062] (2) Prepare the mixed solution: add silk fibroin powder with a particle size of 5 μm and a solid content of 70% to the above cellulose acetate solution, and then use a high-speed stirrer to stir for 30 minutes to obtain a well-mixed organic-inorganic mixture solution, left to defoam for 30 minutes to obtain a mixed solution;

[0063] (3) Preparation of cellulose acetate / silk fibroin hybrid film: Coat the mixed solution on a release paper with a thickness of 0.05 mm, and quickly imme...

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Abstract

The invention discloses a preparation method of a cellulose acetate based hybrid membrane. The preparation method includes the steps: preparing cellulose acetate particles and solvents into celluloseacetate solution; adding fibroin powder into the cellulose acetate solution, uniformly stirring the solution and defoaming the solution to obtain mixed solution; uniformly coating release paper with the mixed solution, immersing the release paper into water solution, taking out the release paper after a membrane is formed, drying the release paper and then peeling the release paper to obtain a cellulose acetate / fibroin hybrid membrane; immersing the cellulose acetate / fibroin hybrid membrane into silver nitrate solution, performing adsorption in a dark place, immersing the cellulose acetate / fibroin hybrid membrane into glycol solution of sodium hydroxide, immersing the cellulose acetate / fibroin hybrid membrane into ferric chloride solution, and taking out, washing and drying the cellulose acetate / fibroin hybrid membrane to obtain the cellulose acetate based hybrid membrane. The prepared cellulose acetate based hybrid membrane has the advantages of biodegradability, immobilization firmness and easiness in recovery, and can be used for water resource purification, disinfection and sterilization.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a preparation method of a cellulose acetate-based hybrid membrane. Background technique [0002] Since the 1970s, continuous environmental pollution and energy shortages have aroused people's concerns about global crises, especially the increasingly prominent problem of water pollution, which has seriously affected the sustainable development of human society and caused various health and Safety issues, sewage treatment is imminent. At present, the commonly used methods for removing harmful substances from sewage include coagulation method, acid analysis method, biochemical method, liquid membrane separation method, granular activated carbon method, etc., but the effect is not satisfactory and it is difficult to apply it alone. Therefore, it is very necessary to develop new and practical environmental protection treatment technology. [0003] In recen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/06C08J5/18C08L1/12C08L89/00C02F1/30C02F1/32
CPCC02F1/30C02F1/32C02F2303/04C08J5/18C08J7/06C08J2301/12C08J2489/00
Inventor 周虎王晓虹蹇建曾坚贤刘国清眭玉光汤龙
Owner HUNAN UNIV OF SCI & TECH
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