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Aerogel material as well as preparation method and application thereof

An aerogel and gel technology, applied in the field of aerogel, can solve the problems of slow development and preparation of aerogel, and achieve the effects of good molding ability, good adsorption performance, and beneficial to cost control and environmental protection

Inactive Publication Date: 2019-06-07
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of whether at home or abroad, it is an inevitable trend for the diversified utilization of waste paper to develop based on paper products and to use non-paper products. However, this trend is developing slowly and needs to be further studied by the majority of scientific researchers. At present, there is no use of waste paper. Related reports on the preparation of aerogels with all components

Method used

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  • Aerogel material as well as preparation method and application thereof
  • Aerogel material as well as preparation method and application thereof
  • Aerogel material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of an airgel material, comprising the steps of:

[0054] 1) Put the waste paper in a lithium bromide solution with a mass percentage of 40%, and stir it in an oil bath at 150°C until it no longer dissolves or gel appears, then pour the mixed solution into a mold, and put it under room temperature Cool to get a gel;

[0055] 2) Soak in deionized water and continuously replace the gel until no precipitation is detected by silver nitrate to obtain a hydrogel;

[0056] 3) At room temperature, place the hydrogel in tert-butanol aqueous solutions with tert-butanol mass percentages of 30%, 60% and 100% in turn, and stand in each concentration of tert-butanol for 24 hours, and replace it every 12 hours A tert-butanol solution of the same mass percentage to obtain an alcohol gel;

[0057] 4) Freeze-drying the alcogel (freeze at -60° C., drying vacuum degree is 1 Pa) to obtain an airgel material.

Embodiment 2

[0059] A preparation method of an airgel material, comprising the steps of:

[0060] 1) Put the waste paper in a lithium bromide solution with a mass percentage of 50%, and stir it in an oil bath at 130°C until it no longer dissolves or gel appears, then pour the mixed solution into a mold, and put it under room temperature Cool to get a gel;

[0061] 2) Soak in deionized water and continuously replace the gel until no precipitation is detected by silver nitrate to obtain a hydrogel;

[0062] 3) At room temperature, place the hydrogel in 30%, 60% and 100% tert-butanol aqueous solutions in sequence, and let stand in each concentration of tert-butanol for 24 hours, and replace the same mass every 12 hours. Percentage of tert-butanol solution to obtain alcohol gel;

[0063] 4) Freeze-drying the alcogel (freeze at -60° C., drying vacuum degree is 1 Pa) to obtain an airgel material.

Embodiment 3

[0065] A preparation method of an airgel material, comprising the steps of:

[0066] 1) Put the waste paper in a lithium bromide solution with a mass percentage of 60%, and stir it in an oil bath at 130°C until it no longer dissolves or gel appears, then pour the mixed solution into a mold, and put it under room temperature Cool to get a gel;

[0067] 2) Soak in deionized water and continuously replace the gel until no precipitation is detected by silver nitrate to obtain a hydrogel;

[0068] 3) At room temperature, place the hydrogel in 30%, 60% and 100% tert-butanol aqueous solutions in sequence, and let stand in each concentration of tert-butanol for 24 hours, and replace the same mass every 12 hours. Percentage of tert-butanol solution to obtain alcohol gel;

[0069] 4) Freeze-drying the alcohol gel (freeze at -60°C, drying vacuum is 1Pa) to obtain an airgel material;

[0070] 5) Put the airgel material in a glass bottle, and place an open beaker containing 600 μL modif...

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Abstract

The invention discloses an aerogel material as well as preparation method and application thereof. The method comprises the following steps: 1) placing waste paper in a lithium bromide solution to dissolve and cool the waste paper to obtain gel; 2) soaking the gel with water and replacing the gel to obtain hydrogel; 3) soaking the hydrogel with an alcohol solution and replacing the hydrogel to obtain an alcohol gel; 4) freeze-drying the alcohol gel to obtain the aerogel material. The aerogel material is successfully prepared from whole-component waste paper, and the aerogel material with the hydrophobic characteristic can be obtained through further modification. The method does not need pretreatment on the raw materials, adopts waste paper as the raw materials, turns waste into resources,and is more beneficial to cost control and environmental protection. According to the method, lithium bromide which is pollution-free and easy to recover is used as a solvent, and the preparation method is simple, easy to operate and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of airgel, in particular to an airgel material and its preparation method and application. Background technique [0002] With the development of industry, the pollution caused by oily wastewater and offshore oil spills has caused damage to the ecological environment, forcing humans to develop a large number of oil-absorbing materials. At present, the treatment methods of oil spill accidents mainly include physical, biological and chemical methods. Among them, the biological method is slower, the cycle is longer and the efficiency is low, and the chemical method will cause secondary pollution. The physical adsorption method is a better method to deal with marine oil spills. The oil-absorbing materials of the physical adsorption method are mainly divided into three categories: inorganic oil-absorbing materials, organic natural oil-absorbing materials and organic synthetic oil-absorbing materials. Inorganic oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J9/36C08J3/075C08L1/02C08L5/14C08L97/00B01J20/24B01J20/28B01J20/30B01D17/022
Inventor 林海琳陈琪杨浩阎杰
Owner ZHONGKAI UNIV OF AGRI & ENG
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