Preparation method of porous fiber-based aerogel adsorbent

A porous fiber and airgel technology, applied in the field of materials, can solve the problems such as the inability to realize the recycling and reuse of waste resources, and achieve the effect of enhancing the richness of pores, efficient adsorption performance, and increasing the richness and strength of pores

Active Publication Date: 2019-08-16
成都毅莘瑞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot achieve the recovery and

Method used

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  • Preparation method of porous fiber-based aerogel adsorbent
  • Preparation method of porous fiber-based aerogel adsorbent
  • Preparation method of porous fiber-based aerogel adsorbent

Examples

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Embodiment 1

[0031] A preparation method of porous fiber-based airgel adsorbent, comprising the following steps:

[0032] (1) Disperse the cellulose in the cellulose dissolving solution and freeze at -15°C for 2 hours to obtain a cellulose solution; the mass ratio of the cellulose to the cellulose dissolving solution is 1:33, and the cellulose dissolving solution It is a mixed solution of 7wt% NaOH solution and 12wt% urea solution;

[0033] (2) Add APS to the cellulose solution to initiate free radicals, stir for 30 minutes, then add acrylic acid, acrylamide and N,N-methylenebisacrylamide with a neutralization degree of 60%, and stir at 25°C and 300rpm Polymerize for 12 hours to obtain a gel-like polymer; the mass ratio of the APS-induced free radicals, acrylic acid, acrylamide and N,N-methylenebisacrylamide is 1:100:20:0.6, and the cellulose and APS-induced The mass ratio of free radicals is 1:0.1;

[0034] (3) The gel polymer was repeatedly washed with alcohol and water, and then freez...

Embodiment 2

[0036] A preparation method of porous fiber-based airgel adsorbent, comprising the following steps:

[0037](1) Disperse the cellulose in the cellulose dissolving solution and freeze at -15°C for 2 hours to obtain a cellulose solution; the mass ratio of the cellulose to the cellulose dissolving solution is 1:33, and the cellulose dissolving solution It is a mixed solution of 7wt% NaOH solution and 12wt% urea solution;

[0038] (2) Add APS to the cellulose solution to initiate free radicals, stir for 30 minutes, add modified activated carbon, stir for 5 minutes, add acrylic acid, acrylamide and N,N-methylenebisacrylamide with a neutralization degree of 60% , stirred and polymerized at 25°C and 300rpm for 12h to obtain a gel-like polymer; the mass ratio of the APS-initiated free radical, acrylic acid, acrylamide, modified activated carbon and N,N-methylenebisacrylamide is 1 :100:20:0.9:0.6, the mass ratio of cellulose and APS to initiate free radicals is 1:0.1;

[0039] (3) Th...

Embodiment 3

[0042] A preparation method of porous fiber-based airgel adsorbent, comprising the following steps:

[0043] (1) Disperse the cellulose in the cellulose dissolving solution and freeze at -10°C for 3 hours to obtain the cellulose solution; the mass ratio of the cellulose to the cellulose dissolving solution is 1:35, and the cellulose dissolving solution It is a mixed solution of 9wt% NaOH solution and 10wt% urea solution;

[0044] (2) Add APS to the cellulose solution to initiate free radicals, stir for 40 minutes, add modified activated carbon, stir for 2 minutes, add acrylic acid, acrylamide and N,N-methylenebisacrylic acid with a neutralization degree of 40% Amide was stirred and polymerized at 30°C and 400rpm for 9h to obtain a gel-like polymer; the mass ratio of the APS-induced free radicals, acrylic acid, acrylamide, modified activated carbon, and N,N-methylenebisacrylamide was 1:80:30:0.6:1, the mass ratio of cellulose and APS to initiate free radicals is 1:0.15;

[00...

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Abstract

The invention relates to the technical field of materials and discloses a preparation method of a porous fiber-based aerogel adsorbent. The method comprises the following steps: 1) placing cellulose in a cellulose dissolving liquid, dispersing and freezing until cellulose is completely dissolved, so as to obtain a cellulose solution; (2) adding APS into the cellulose solution to initiate free radical, stirring and initiating, adding acrylic acid, acrylamide and N,N-methylene bisacrylamide, stirring and polymerizing to obtain a gelatinous polymer; and (3) repeatedly washing the gelatinous polymer by using alcohol and water, and freeze-drying to obtain the porous fiber-based aerogel adsorbent. Through the molecular designing, a functional group is introduced into the cellulose molecules, andthrough process control, the cellulose-based absorbent material with high-efficiency adsorption property is obtained, and the dual-purpose of using wastes to treat wastes by combining recycling of cellulose-containing spinning waste resources and efficient and rapid removal of dyes in dyeing wastewater is achieved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method of a porous fiber-based airgel adsorbent. Background technique [0002] Airgel material is a three-dimensional network structure material obtained by replacing the liquid inside the gel with gas without pore collapse. It has the characteristics of high specific surface area, low density, low thermal conductivity and low dielectric constant. Inorganic aerogels have relatively high density and brittle structure, while organic polymer aerogels have relatively weak mechanical properties and are not resistant to high temperatures. Cellulose airgel uses cellulose as a raw material, which is low in cost and has a wide range of sources. It has excellent biological advantages, good mechanical strength, better toughness, and has more advantages in various industrial applications. [0003] The Chinese invention patent application number is CN201410227554.5, which dis...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28C02F1/28B01J20/30C02F103/30
CPCB01J20/265C02F1/285C02F1/283B01J20/20B01J20/28047C02F2103/30
Inventor 苏秀平
Owner 成都毅莘瑞科技有限公司
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