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Preparation method of nano cellulose composite film

A technology of nanocellulose and composite film, which is applied in the field of composite film preparation, can solve the problems of low tensile strength of film materials, and achieve the effect of broad application prospects.

Active Publication Date: 2012-07-25
NORTHEAST FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the problem of low tensile strength of the membrane material prepared in the prior art, and provides a preparation method of nanocellulose composite membrane

Method used

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  • Preparation method of nano cellulose composite film
  • Preparation method of nano cellulose composite film
  • Preparation method of nano cellulose composite film

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Experimental program
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specific Embodiment approach 1

[0013] Specific embodiment one: the preparation method of a kind of nano-cellulose composite film of this embodiment is carried out according to the following steps:

[0014] 1. Prepare nanocellulose hydrosol: prepare nanocellulose hydrosol by hydrolyzing cellulose with strong acid;

[0015] 2. Preparation of nanocellulose film-forming solution: Weigh polyvinyl alcohol, polyacrylamide, glycerin, nanocellulose hydrosol and deionized water prepared in step 1 and mix them to obtain a mixed solution, and mix the mixed solution at 85-95°C Stir in a water bath for 2 to 4 hours, then ultrasonically treat for 5 to 15 minutes, and then vacuum defoam for 5 to 15 minutes to obtain a nanocellulose film-forming solution; wherein, polyvinyl alcohol: nanocellulose: polyacrylamide: glycerin: deionized water The parts by weight ratio is (30~60):(0.12~4.8):(0.5~1.5):(3~6):(900~1100).

[0016] 3. Preparation of nano-cellulose composite film: the film-forming liquid obtained in step 2 is scraped...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that the cellulose described in Step 1 is microcrystalline cellulose, reed pulp, eucalyptus pulp, bamboo pulp or straw. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: in step 1, the stirring speed is 500-700 r / min. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a nano cellulose composite film, relates to a preparation method of a composite film, and is used for solving the problem that a film prepared by using the prior art is low in tensile strength. The preparation method of the nano cellulose composite film comprises the following steps: 1, preparing nano cellulose hydrosol by adopting a method for hydrolyzing cellulose with strong acid; 2, weighing and mixing poval, polyacrylamide, glycerol, nano cellulose hydrosol and deionized water to obtain a mixed solution, stirring for 2-4 hours in water bath, carrying out ultrasonic treatment, and then carrying out vacuum debubbling so as to obtain a nano cellulose film-forming liquid; and 3, carrying out scrape coating on the film-forming liquid obtained in the step 2 by adopting a scrape coating method on a polytetrafluoroethylene plate, and drying at room temperature to obtain the nano cellulose composite film. The preparation method is simple in process, easy to operate and low in cost; and the maximum tensile strength of the prepared nano cellulose composite film can reach 66.57MPa and is improved by 69.17% as compared with a poval film. The preparation method is used for preparing the nano cellulose composite film.

Description

technical field [0001] The invention relates to a preparation method of a composite membrane. Background technique [0002] As people pay more and more attention to environmental protection, the pollution caused by the use of plastics has attracted worldwide attention, so biodegradable materials have been flourishing. Polyvinyl alcohol film has excellent microbial decomposition performance, can be decomposed into carbon dioxide and water, and does not pollute the environment. However, the tensile strength of polyvinyl alcohol film is relatively low, which limits its performance and application range. Contents of the invention [0003] The invention aims to solve the problem of low tensile strength of the membrane material prepared in the prior art, and provides a preparation method of the nanocellulose composite membrane. [0004] The preparation method of a kind of nano-cellulose composite film of the present invention is carried out according to the following steps: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L29/04C08L1/04C08L33/26
Inventor 刘志明吴鹏王海英谢成
Owner NORTHEAST FORESTRY UNIVERSITY
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