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Nanometer cellulose/polyvinyl alcohol gel composite material

A polyvinyl alcohol gel, nanocellulose technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problem of low aerogel strength, limited promotion and application of thermal insulation materials, and high brittleness. and other problems, to achieve the effect of high specific surface area, low density and high porosity

Active Publication Date: 2014-01-01
SHANDONG LVSEN WOOD PLASTIC COMPOSITE
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing airgel has low strength and high brittleness, which limits its promotion and application as heat insulation materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0007] 1. Preparation of nanocellulose by chemical combined with mechanical treatment,

[0008] 1. Chemical treatment :

[0009] (1) Chemical treatment method:

[0010] 1) Weigh 6g of absorbent cotton, tear the absorbent cotton into small bundles of filaments as much as possible, put them in a beaker, and soak them in distilled water for 24 hours;

[0011] 2) Add 3g of sodium chlorite to the beaker, stir evenly with a glass rod, then put it in a water bath at 75°C and heat for 6 hours;

[0012] 3) Filter the absorbent cotton treated with sodium chlorite until neutral, then put it into 500ml,

[0013] In the solution of 5% potassium hydroxide, put the beaker into a water bath whose temperature is adjusted to 90°C for 6 hours, then take out the beaker, and filter the solution in the beaker to neutrality;

[0014] 4) Add the filtered fiber particles into a hydrochloric acid solution containing 1.5% concentration, treat at 80°C for 12 hours, and finally filter the granular fib...

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PUM

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Abstract

The invention relates to a nanometer cellulose / polyvinyl alcohol gel composite material, which is characterized by comprising hydrogel and aerogel. A preparation method of the nanometer cellulose / polyvinyl alcohol gel composite material comprises the following process steps of 1, nanometer cellulose preparation by a chemical combination mechanical treatment method; 2, composite hydrogel preparation; and 3, composite aerogel preparation. The nanometer cellulose / polyvinyl alcohol gel composite material has the advantages that the composite aerogel belongs to a porous amorphous solid material consisting of nanometer level colloid particles or high-polymer molecules, and a unique open nanometer level porous structure and a continuous three-dimensional reticular structure are adopted, so the density is extremely low, the specific surface area is high, and the porosity is high, wherein the solid phase of the aerogel accounts for 0.2 percent to 20 percent of the total volume percentage, the characteristics of high adsorption catalytic capability, low thermal conductivity, low sound resistance, low refractive index and the like are shown, and wide application prospects are realized in the fields of aviation, spaceflight, chemical industry, metallurgy, energy-saving building and the like.

Description

technical field [0001] The invention relates to a nanocellulose / polyvinyl alcohol gel composite material. Background technique [0002] Existing aerogels have low strength and high brittleness, which limits their promotion and application as thermal insulation materials. In recent years, scholars have devoted themselves to the compounding of airgel and other materials to prepare thermal insulation materials with certain strength and excellent thermal insulation properties. This composite thermal insulation material and airgel thermal insulation materials are called nanopores together. Efficient insulation. Usually, the materials added to nanoporous high-efficiency thermal insulation materials are mainly functional additives such as fibers and opacifying agent particles. Due to the unique long-chain structure of plant nanofibers, the fibers have high mechanical strength and elastic modulus. The composite airgel materials prepared by adding nanofibers can greatly improve th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F291/08C08B15/08C08J9/28C08J3/075C08L1/02C08L29/04
CPCY02P20/10
Inventor 李大纲孙光伟
Owner SHANDONG LVSEN WOOD PLASTIC COMPOSITE
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