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Cellulose/silicon oxide composite aerogel elastomer, preparation method thereof and application of elastomer in field of oil-water separation

A composite aerogel and cellulose technology, applied in liquid separation, chemical instruments and methods, separation methods, etc., can solve the problems of limited practical application, non-degradable materials, secondary environmental pollution, etc. Conducive to recycling and reducing production costs

Active Publication Date: 2018-05-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main representatives are electrospun organic polymer fibers such as polystyrene fiber membranes. This type of material is easy to prepare and has high adsorption capacity. However, the material itself cannot be degraded after use, and it is not suitable for disposal, which will cause secondary pollution to the environment.
Inorganic carbon-based aerogels, such as graphene aerogels and carbon nanotube aerogels, have high chemical stability and high oil absorption efficiency, but the high cost of preparation limits its practical application

Method used

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  • Cellulose/silicon oxide composite aerogel elastomer, preparation method thereof and application of elastomer in field of oil-water separation
  • Cellulose/silicon oxide composite aerogel elastomer, preparation method thereof and application of elastomer in field of oil-water separation
  • Cellulose/silicon oxide composite aerogel elastomer, preparation method thereof and application of elastomer in field of oil-water separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1: Weigh 12.5g of glucose, 3.75g of yeast extract, 5g of peptone, and 5g of disodium hydrogen phosphate in a beaker, add 500mL of water and stir to dissolve to obtain a bacterial culture medium; after sterilizing the culture medium, add 1mL Acetobacter xylinum solution HN001 was added to polystyrene foamed beads with a diameter of 500μm and incubated for 5 days to obtain a bacterial cellulose gel; remove the gel, rinse it with deionized water, and soak it in absolute ethanol solution To replace the internal water content, get an alcohol gel; take 5 g of alcohol gel, drain the ethanol on the surface, add it to 5 g of toluene, heat it at 80°C for 6 hours, then take out the gel and soak clean with toluene and absolute ethanol to obtain Cellulose frame template gel;

[0055] Step 2: Take 1g of the above cellulose frame template gel and add it to 10mL of absolute ethanol, add 0.1g of cetyltrimethylammonium bromide and stir to dissolve, add 1mL of tetramethyl silicate, stir...

Embodiment 2

[0058] Step 1: Weigh 25g of glucose, 7.5g of yeast extract, 10g of peptone, and 10g of disodium hydrogen phosphate in a beaker, add 1000mL of water and stir to dissolve to obtain a bacterial culture medium; after sterilizing the culture medium, insert 5mL wood Acetobacter liquid HN001, add polystyrene foamed beads with a diameter of 1300μm, stand still for 7 days to obtain bacterial cellulose gel; take out the gel, rinse it with deionized water, and soak it in anhydrous ethanol solution Displace the internal water to obtain the alcohol gel; take 5 g of alcohol gel, drain the ethanol on the surface, add to 50 g of toluene, heat at 25 ℃ for 6 hours, take it out and soak clean with toluene and absolute ethanol to obtain cellulose Frame template gel;

[0059] Step 2: Take 4g of the above cellulose frame template gel, add it to 50mL of absolute ethanol, add 0.3g of cetyltrimethylammonium bromide and stir to dissolve, add 4mL of tetrapropyl silicate, tetraethyl silicate 2mL, stir to f...

Embodiment 3

[0062] Step 1: The configuration of the medium is the same as that in Example 2. After the medium is sterilized by moist heat, 5 mL of Acetobacter xylinum solution HN001 is added, and polystyrene foamed beads with a diameter of 1700 μm are added, and the culture is allowed to stand still. After 7 days, the bacterial cellulose gel was obtained; the gel was taken out, rinsed with deionized water, and then immersed in an absolute ethanol solution to replace the internal water to obtain an alcohol gel; take 5 g of the alcohol gel and drain the surface Ethanol was added to 25g of toluene and heated at 80°C for 0.5h. After heating, take out the gel, soak and wash it with toluene and absolute ethanol to obtain the cellulose frame template gel;

[0063] Step 2: Take 6g of the above cellulose frame template gel, add to 50mL of absolute ethanol, add 2g of cetyltrimethylammonium bromide and stir to dissolve, add 6mL of tetrapropyl silicate, stir the solution to fully infiltrate the gel ; A...

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Abstract

The invention discloses a cellulose / silicon oxide composite aerogel elastomer, a preparation method thereof and an application of the elastomer in the field of oil-water separation, and belongs to thefield of oil-water separation materials. Bacterial cellulose has wide macropores, and is obtained by in-situ co-culture of acetobacter xylinum and polystyrene small spheres with different sizes, andthe pore size of the cellulose can be adjusted in the range of 500-1700[mu]m. The silicon oxide is compounded with the bacterial cellulose to topologize the three-dimensional network structure of thecellulose, and therefore the cellulose / silicon oxide composite aerogel with a high porosity and elasticity is obtained. The cellulose / silicon oxide composite aerogel elastomer provided by the invention can be directly dried at normal temperature and pressure, the steps such as supercritical drying or freeze drying necessary for the preparation of a traditional aerogel are avoided, and the production costs are reduced; after the aerogel elastomer is reused for 20 times, the oil absorption capacity can still reach 94% of initial capacity; and the preparation method provided by the invention is simple, and the material is friendly to the environment, is biodegradable, does not cause secondary pollution to the environment, and has good application prospects in the field of oil-water separation.

Description

Technical field [0001] The invention belongs to the field of oil-water separation materials, and specifically relates to a cellulose / silica composite aerogel elastomer, a preparation method and its application in the field of oil-water separation. Background technique [0002] With the rapid development of industry, the discharge of a large amount of oily wastewater and the leakage of oil in the process of mining, transportation and use have caused increasingly serious pollution to water resources such as rivers and oceans. The removal of oil pollutants has become one of the environmental problems that need to be solved urgently. There are currently four main solutions: roasting the floating oil on the water surface to remove the heat; spraying a dispersant to make the oil enter the water body to dilute the oil concentration; adding oleophilic microorganisms to degrade the oil droplets; using an adsorbent to collect, Absorb oil on the water. The roasting method is usually used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D17/022
CPCB01D17/0202B01J20/103B01J20/24B01J20/28047
Inventor 徐雁李冠楠邹琛马小婷陶嘉伟李平
Owner JILIN UNIV
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