A kind of preparation method of regenerated antibacterial cellulose-polyvinyl alcohol composite film

A technology of polyvinyl alcohol and cellulose, which is applied in the field of regenerated antibacterial cellulose film and its preparation, can solve the problems that cellulose is not easy to form into a film, and achieve the effects of good mechanical properties, good antibacterial properties, and good barrier properties

Active Publication Date: 2017-10-27
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing quaternized modified cellulose is not easy to form a film, and a method for preparing a regenerated antibacterial cellulose-polyvinyl alcohol composite film is provided

Method used

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  • A kind of preparation method of regenerated antibacterial cellulose-polyvinyl alcohol composite film
  • A kind of preparation method of regenerated antibacterial cellulose-polyvinyl alcohol composite film
  • A kind of preparation method of regenerated antibacterial cellulose-polyvinyl alcohol composite film

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specific Embodiment approach 1

[0018] Specific embodiment one: the preparation method of a kind of regenerated antibacterial cellulose-polyvinyl alcohol composite film of the present embodiment is carried out according to the following steps:

[0019] 1. Take the reaction molar ratio of epichlorohydrin and dodecyl tertiary amine as (2.5~3.0):1, weigh epichlorohydrin and dodecyl tertiary amine and add them into the reaction vessel. Under the conditions, the reaction time is 2 to 3 hours to obtain the quaternary ammonium salt compound, and then purified by acetone recrystallization and ether cleaning to obtain the product YB;

[0020] Two, be 7~7.5% by the mass concentration of sodium hydroxide (NaOH), be 12~12.5% ​​by the mass concentration of urea, join sodium hydroxide and urea in water, obtain mixed aqueous solution; Add 2-4% cellulose to the mixed aqueous solution to dissolve to obtain a cellulose solution;

[0021] 3. According to the mass ratio of YB and cellulose (12.67~25.33): 1, the YB obtained in ...

specific Embodiment approach 2

[0024] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, the molar ratio of epichlorohydrin to dodecyl tertiary amine is 2.8:1; others are the same as specific embodiment one.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the reaction temperature in Step 1 is 63° C., and the reaction time is 2.5 h; the others are the same as Embodiment 1 or 2.

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Abstract

A method for preparing a regenerated antibacterial cellulose-polyvinyl alcohol composite film, the invention relates to a regenerated antibacterial cellulose film and a preparation method thereof. The technical problem to be solved by the invention is the existing technical problem that the cellulose modified by quaternization is not easy to form a film. The method: 1. prepare quaternary ammonium salt compound; 2. prepare cellulose solution; 3. prepare quaternized cellulose solution; 4. prepare polyvinyl alcohol aqueous solution; Mix evenly, cast and form a film, solidify and cross-link at room temperature, solidify and form in a coagulation bath, wash and dry to obtain a regenerated antibacterial cellulose-polyvinyl alcohol composite film; the tensile strength of the film is 37.87-82.97 MPa, the elongation at break is 52.08% to 65.32%. Low oxygen and moisture permeability, can inhibit Gram-negative and positive bacteria, and can be used in medical and health fields.

Description

technical field [0001] The invention relates to a regenerated antibacterial cellulose film and a preparation method thereof. Background technique [0002] Wound dressings provide a favorable environment for rapid wound healing. An ideal dressing should be able to prevent bacterial invasion, cover and protect the wound from infection, and have good biocompatibility. Cellulose is a renewable, easily degradable natural polymer that can be formed into a film alone. In the field of medical materials, cellulose wound dressing films have received more and more attention. Although the cellulose film has good physical properties and biocompatibility, it does not have antibacterial properties, and quaternized ammonium groups are grafted on the cellulose molecules through hydroxyl reactions to endow the cellulose with antibacterial and antibacterial properties against pathogenic microorganisms. However, as the molecular chain length of the grafted quaternary ammonium salt increases, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J3/24C08L29/04C08L1/28C08B11/145
Inventor 王立娟胡冬英
Owner NORTHEAST FORESTRY UNIVERSITY
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