Cellulose improved moisture-permeable barrier composite film and preparation method thereof

A composite film and cellulose technology, which is applied in the field of cellulose-improved moisture-permeable barrier composite film and its preparation, to achieve excellent barrier properties, improve mechanical properties, and have market competitiveness

Active Publication Date: 2012-03-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these properties are independent of each other and not directly related, so how to improve these properties at the same time is one of the technical challenges we face

Method used

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  • Cellulose improved moisture-permeable barrier composite film and preparation method thereof
  • Cellulose improved moisture-permeable barrier composite film and preparation method thereof
  • Cellulose improved moisture-permeable barrier composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, the moisture-permeable barrier composite film is composed of polyvinyl chloride, sodium montmorillonite and cellulose acetate, wherein the sodium montmorillonite is dispersed in polyvinyl chloride as crystal phase powder to form a multi-phase solid film; The mass ratio of polyvinyl chloride powder, sodium montmorillonite and cellulose acetate is 4:5.7:0.3.

[0032] The preparation method of above-mentioned composite film is: get industrial polyvinyl chloride powder 3g and dissolve in 150mL tetrahydrofuran organic solvent, add cellulose acetate and sodium montmorillonite, polyvinyl chloride powder, sodium montmorillonite and acetic acid in the obtained clear liquid The mass ratio of cellulose is 4:5.7:0.3; oscillate ultrasonically for 20 minutes to make a suspension, cast it on a glass plate, and dry it to form a self-hanging film; keep it in a blast drying oven at 40°C for half an hour and then peel it off Thin film, the film thickness is 20μm~100μm,...

Embodiment 2

[0041] In this embodiment, the moisture-permeable barrier composite film is composed of polyvinyl chloride, sodium montmorillonite and cellulose acetate, wherein the sodium montmorillonite is dispersed in polyvinyl chloride as crystal phase powder to form a multi-phase solid film; The mass ratio of polyvinyl chloride powder, sodium montmorillonite and cellulose acetate is 4:5.4:0.6.

[0042] The preparation method of above-mentioned composite film is: get industrial polyvinyl chloride powder 3g and dissolve in 150mL tetrahydrofuran organic solvent, add cellulose acetate and sodium montmorillonite, polyvinyl chloride powder, sodium montmorillonite and acetic acid in the obtained clear liquid The mass ratio of cellulose is 4:5.4:0.6; oscillate ultrasonically for 20 minutes to make a suspension, cast it on a glass plate, and dry it to form a self-hanging film; keep it in a blast drying oven at 40°C for half an hour and then peel it off Thin film, the film thickness is 20μm~100μm,...

Embodiment 3

[0050] Other conditions are the same as in Example 1, and the difference is that hydroxypropyl methylcellulose is used to replace cellulose acetate to make a composite film, and the composite film obtained is similar to the composite film obtained in Example 1, and the composite film obtained in Comparative Example 1 Compared with thin films, it not only has excellent gas barrier properties, but also improves moisture permeability and mechanical properties.

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PUM

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Abstract

The invention discloses a cellulose improved moisture-permeable barrier composite film and a preparation method thereof. The composite film comprises the following components in percentage by mass: 10-80% of high polymer, 10-90% of silicate and 1-20% of additive, wherein the silicate is dispersed in the high polymer in the form of crystalline-phase powder particles to form a multiphase solid film; the high polymer has solubility or fusibility, and the silicate has a laminar or porous structure; and the additive is one or mixture of hydroxypropyl methylcellulose, hydroxyethyl cellulose, acetylcellulose, hydroxypropyl cellulose and carboxymethyl cellulose. Compared with the prior art, the composite film provided by the invention has excellent barrier property for carbon dioxide and other gases, and higher moisture permeability and mechanical properties, thereby having better market competitive edge.

Description

technical field [0001] The invention belongs to the technical field of polymer films, and specifically relates to a cellulose-improved moisture-permeable barrier composite film and a preparation method thereof, which are applied to air heat exchangers, ion exchange membranes, water treatment, and special functional paper for recording characters. Background technique [0002] With the improvement of living standards, people's living space is more and more affected by modern civilization. The use of heating in winter and cooling in summer and air conditioning makes the indoor and outdoor temperature difference larger. In order to save energy, people have strengthened the airtightness and thermal insulation of the building, resulting in that if the air cannot be changed in time, the indoor air quality will be significantly deteriorated; moreover, because many people use laminate flooring, fiberboard, and foam insulation materials when decorating their houses. , marble and oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L27/06C08L23/06C08L29/04C08L27/12C08L23/28C08L23/30C08L1/26C08L1/12C08K3/34C08K7/26C08K9/00
Inventor 薛立新陈景刘秉鑫李娟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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