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Hydrophobic lignin/cellulose aerogel oil-water separation material as well as preparation method and application thereof

A technology for aerogel oil and separation materials, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of not exerting the value of lignin and environmental pollution, and achieves the promotion of development and application, environmental friendliness, excellent quality The effect of circularity and recyclability

Active Publication Date: 2021-03-12
图们市华威友邦化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Lignin is a natural macromolecule second only to cellulose in nature. Every year, industrial lignin, a by-product of the paper industry in my country, is piled up as waste or directly incinerated to obtain a low calorific value. The value of its own, there is also the problem of environmental pollution, researchers are committed to the efficient use of lignin, but the application of lignin in cellulose aerogels is rarely reported

Method used

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  • Hydrophobic lignin/cellulose aerogel oil-water separation material as well as preparation method and application thereof
  • Hydrophobic lignin/cellulose aerogel oil-water separation material as well as preparation method and application thereof
  • Hydrophobic lignin/cellulose aerogel oil-water separation material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Make 10-20 parts of solvent from 5-10 wt% NaOH solution, add 2 parts of hydroxyethyl cellulose and 1 part of alkali lignin while stirring, and stir for 5 hours at room temperature to obtain a uniform lignin / cellulose composite solution. Add 1 part of epichlorohydrin at room temperature for cross-linking reaction, stir evenly, place in a mold and react at room temperature for 24 hours to form a lignin / cellulose composite hydrogel. Then, the hydrogel was solvent-exchanged in absolute ethanol solution for 24 hours, then solvent-exchanged in deionized water for 2 days, and freeze-dried at -40°C for 36 hours to obtain a lignin / cellulose composite airgel. Cut the prepared lignin / cellulose composite airgel into 3cm×3cm×3cm blocks, put the airgel and 1ml open vial filled with methyltrimethoxysilane in a closed container and react in an oven at 70°C After 12 hours, a hydrophobically modified lignin / cellulose composite airgel oil-absorbing material was obtained.

[0036] Put 0.5...

Embodiment 2

[0038] Make 10-20 parts of solvent from 5-10 wt% NaOH solution, add 2 parts of hydroxyethyl cellulose and 3 parts of alkali quality while stirring, and stir at room temperature for 5 hours to obtain a uniform lignin / cellulose composite solution. Add 1 part of epichlorohydrin at room temperature for cross-linking reaction, stir evenly, place in a mold and react at room temperature for 24 hours to form a lignin / cellulose composite hydrogel. Then, the hydrogel was solvent-exchanged in absolute ethanol solution for 24 hours, then solvent-exchanged in deionized water for 2 days, and freeze-dried at -40°C for 36 hours to obtain a lignin / cellulose composite airgel. Cut the prepared lignin / cellulose composite airgel into 3cm×3cm×3cm blocks, put the airgel and an open vial containing 1ml of methyltrimethoxysilane in a closed container and react in an oven at 70°C for 12h , to obtain a hydrophobically modified lignin / cellulose composite airgel oil-absorbing material.

[0039] Put 0.5g ...

Embodiment 3

[0041]Make 10-20 parts of solvent from 5-10 wt% NaOH solution, add 2 parts of hydroxyethyl cellulose and 10 parts of alkali lignin while stirring, and stir for 5 hours at room temperature to obtain a uniform lignin / cellulose composite solution. Add 1 part of epichlorohydrin at room temperature for cross-linking reaction, stir evenly, place in a mold and react at room temperature for 24 hours to form a lignin / cellulose composite hydrogel. Then, the hydrogel was solvent-exchanged in absolute ethanol solution for 24 hours, then solvent-exchanged in deionized water for 2 days, and freeze-dried at -40°C for 36 hours to obtain a lignin / cellulose composite airgel. Cut the prepared lignin / cellulose composite airgel into 3cm×3cm×3cm blocks, put the airgel and an open vial containing 1ml of methyltrimethoxysilane in a closed container and react in an oven at 70°C for 12h , to obtain a hydrophobically modified lignin / cellulose composite airgel oil-absorbing material.

[0042] Put 0.5g o...

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Abstract

The invention belongs to the technical field of environment-friendly materials, and particularly discloses a hydrophobic lignin / cellulose aerogel oil-water separation material as well as a preparationmethod and application thereof. The preparation method comprises the steps of adding lignin and cellulose into an alkaline solution to obtain a lignin / cellulose mixed solution; adding a cross-linkingagent to obtain lignin / cellulose composite hydrogel; performing solvent exchange and drying to obtain elastic aerogel, and performing hydrophobic modification on the elastic aerogel by using a silanecoupling agent through a chemical vapor deposition method to obtain hydrophobic lignin / cellulose aerogel. The lignin / cellulose aerogel oil absorption material prepared before and after hydrophobic modification has a highly porous network structure, and the absorption rate of the prepared oil absorption material placed in an oil-water mixture is up to 10-25 times or above of the self weight. The oil can be extruded in an extrusion manner after oil absorption, so that the oil absorption material is regenerated, and still has very high oil absorption efficiency after being recycled.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a hydrophobic lignin / cellulose airgel oil-water separation material and its preparation method and application. Background technique [0002] With the development of the world economy and the improvement of human living standards, the demand for oil is increasing day by day, and oil spill accidents occur frequently in the process of oil transportation and exploitation, which has caused great damage to the marine aquatic environment. At the same time, the pollution situation of industrial wastewater containing oil or non-polar organic solvents in my country is not optimistic, and has seriously threatened the surrounding ecological environment and human health. Therefore, effectively solving the problem of oil pollution has become an urgent and arduous task at present. . At present, the main treatment method of oily wastewater is to use hydrop...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08J3/24C08L1/28C08L97/00B01D17/022
CPCC08J9/28C08J3/246B01D17/0202C08J2301/28C08J2497/00C08J2397/00C08J2401/28C08J2201/0484
Inventor 郑大锋胡玲邱学青孙兰
Owner 图们市华威友邦化工有限公司