Sodium alginate-palm fiber composite aerogel as well as preparation method and application thereof

A composite airgel and sodium alginate technology, which is applied in the field of sodium alginate-palm fiber composite airgel and its preparation, can solve the problems of poor mechanical properties, inability to use in the construction field, lack of thermal insulation and sound absorption functions, etc.
CN112521652AActive Publication Date: 2021-03-19YANCHENG INST OF IND TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANCHENG INST OF IND TECH
Publication Date
2021-03-19

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Abstract

The invention provides sodium alginate-palm fiber composite aerogel as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing palm fibers with degumming liquid, and carrying out microwave treatment to obtain degummed palm fibers, wherein the degumming liquid comprises sodium hydroxide, hydrogen peroxide, crude oil and water; sequentially carrying out first freeze drying and crushing on the degummed palm fibers to obtain palm microcrystalline cellulose; mixing sodium alginate, water and the palm microcrystalline cellulose, defoaming and standing to obtain composite hydrogel; and carrying out second freeze drying on the composite hydrogel to obtain the sodium alginate-palm fiber composite aerogel. The aerogel obtained by the invention has the advantages of porosity, low heat conduction coefficient, excellent thermal insulation property and excellent sound absorption function. Besides, the palm microcrystalline cellulose is used as a framework, so that the mechanical property of the aerogel is improved, and the aerogel can be used as an advanced building material, such as a thermal insulation material and a sound absorption material.
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Description

technical field

[0001] The invention relates to the technical field of gel materials, in particular to a sodium alginate-palm fiber composite airgel and a preparation method and application thereof. Background technique

[0002] Sodium alginate is a pure natural polysaccharide polymer with wide sources, environment-friendly, high safety and good film-forming, thickening and gelling properties. Sodium alginate prepared from this raw material Airgel is known for its hydrophilicity, strong gel ability, good biocompatibility and biodegradability. It is a new type of porous material with high specific surface area, but its structure has low mechanical strength and uneven structure. , easy to collapse and other defects seriously limit its application in more fields. Sodium alginate aerogels have been improved in the existing technology and have been applied in more fields. For example, Li Yun prepared sodium alginate-silica composite aerogels, which improved the stability of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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