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Method for preparing inorganic oxide aerogel by taking biomass nanometer fibrillation cellulose as template

A nanofibrillation, inorganic oxide technology, applied in the preparation of oxide/hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of low yield, complex process, high cost, etc. The effect of low pollution and low price

Inactive Publication Date: 2013-05-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex process, high cost and low yield in the existing method for preparing inorganic oxide aerogels, and to provide a method for preparing inorganic oxides using biomass nanofibrillated cellulose as a template. Airgel method

Method used

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  • Method for preparing inorganic oxide aerogel by taking biomass nanometer fibrillation cellulose as template
  • Method for preparing inorganic oxide aerogel by taking biomass nanometer fibrillation cellulose as template

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specific Embodiment approach 1

[0014] Specific Embodiment 1: This embodiment is a method for preparing inorganic oxide aerogels using biomass nanofibrillated cellulose as a template, specifically as follows:

[0015] 1. Preparation of biomass nanofibrillated cellulose aqueous solution: ①. Firstly, crush the raw material of biomass nanofibrillated cellulose to obtain 60-80 mesh biomass powder, and then process 60-80 mesh biomass powder Extract and remove the extract to obtain a light yellow solid; ②, first dissolve sodium chlorite in deionized water, and then adjust the pH value to 4-5 with glacial acetic acid to obtain chlorite with a pH value of 4-5 Sodium chlorite solution; ③, immerse the light yellow solid obtained in step 1 into the sodium chlorite solution with a pH value of 4 to 5 obtained in step 2, and soak at a temperature of 75°C to 80°C until the light yellow solid turns into until it becomes a white solid, take out and obtain hemcellulose; ④, immerse the hemcellulose obtained in step 1 and ③ in ...

specific Embodiment approach 2

[0026] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the raw material of biomass nanofibrillated cellulose described in step ① is forest waste, cotton, hemp, animal hair, waste silk, spider silk, bamboo, straw or bagasse. Others are the same as the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the Soxhlet extraction described in step one ① described in step one ① is carried out as follows: the 60~80 mesh raw Put the substance powder into a Soxhlet extractor, and use benzene / ethanol solution to extract at a temperature of 80°C to 95°C for 5h to 7h to obtain a light yellow solid; It is made by mixing benzene and absolute ethanol at a volume ratio of 2:1. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing inorganic oxide aerogel by taking biomass nanometer fibrillation cellulose as a template, relating to a preparation method of the inorganic oxide aerogel. The method aims at solving the problems of complex process, high cost and low yield of the traditional method for preparing the inorganic oxide aerogel. The method comprises the following steps of: 1, preparing a biomass nanometer fibrillation cellulose water solution; 2, preparing a biomass nanometer fibrillation cellulose absolute ethyl alcohol solution; 3, mixing to obtain an inorganic / biomass nanometer fibrillation cellulose mixed solution; 4, preparing an inorganic / biomass nanometer fibrillation cellulose composite material dispersion solution; 5, displacing and concentrating to obtain an inorganic / biomass nanometer fibrillation cellulose composite material / tert-butyl alcohol suspension; 6, carrying out drying treatment to obtain a tert-butyl alcohol / inorganic / biomass nanometer fibrillation cellulose composite material; and 7, carrying out template stripping treatment to obtain the inorganic oxide aerogel. The method disclosed by the invention is mainly used for preparing the inorganic oxide aerogel.

Description

technical field [0001] The invention relates to a preparation method of an inorganic oxide airgel. Background technique [0002] Inorganic oxide airgel has unique optical, electrical, magnetic and chemical properties, and has great potential in thermal insulation materials, acoustic impedance coupling materials, gas filters, chemical catalysts or catalyst carriers, and harmless and efficient pesticides. application prospects. At present, the method of preparing inorganic oxide airgel mostly adopts the method of sol-gel method combined with supercritical drying, but in the preparation process, due to the long gelation time, complicated process and high manufacturing cost, the metal Applications of oxide aerogels. Therefore, the existing methods for preparing inorganic oxide aerogels have the problems of complex process, high cost and low yield. Contents of the invention [0003] The purpose of the present invention is to solve the problems of complex process, high cost a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14B82Y30/00
Inventor 李坚卢芸孙庆丰刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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