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Modified cellulose preparation method

A technology of cellulose and cellulose solution, applied in the field of synthetic fibers, can solve the problems of desorption, effective removal, secondary pollution, etc., and achieve the effect of increasing the specific surface area

Inactive Publication Date: 2019-03-01
卓睛睛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon cannot effectively remove polluting gases such as formaldehyde after adsorbing them. When the adsorption reaches saturation and encounters changes in air temperature, humidity and other factors, desorption will occur, resulting in secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of modified cellulose, comprises the steps:

[0021] (1) Dissolution of cellulose;

[0022] Weigh 8.0g of LiC1 and 92.0g of DMSO, add them into a beaker to dissolve and prepare an 8% LiC1-DMSO mixed solution; weigh 1.0g of pineapple leaf cellulose powder and add it to the LiC1-DMSO mixed solution, and stir with a stirrer until Fully dissolved to obtain a cellulose solution;

[0023] (2) Dissolution of hemin;

[0024] Weigh 0.20 of hemin, add it into DMSO solvent, and stir at the same time when adding, until the hemin is fully dissolved to obtain hemin;

[0025] (3) Preparation of modified cellulose;

[0026] Take the above hemin solution and cellulose solution, add the hemin solution into the cellulose solution and mix evenly; then heat and stir, and stop heating when the reaction is over; after the solution is naturally cooled, add deionized water, mix After uniformity, the regenerated cellulose was obtained by centrifugation, and then washed...

Embodiment 2

[0029] The preparation method of modified cellulose, comprises the steps:

[0030] (1) Dissolution of cellulose;

[0031] Weigh 8.0g of LiC1 and 92.0g of DMSO, add them into a beaker to dissolve and prepare an 8% LiC1-DMSO mixed solution; weigh 1.0g of pineapple leaf cellulose powder and add it to the LiC1-DMSO mixed solution, and stir with a stirrer until Fully dissolved to obtain a cellulose solution;

[0032] (2) Dissolution of hemin;

[0033] Weigh 0.25 hemin, add it into DMSO solvent, and stir at the same time when adding, until the hemin is fully dissolved to obtain hemin;

[0034] (3) Preparation of modified cellulose;

[0035] Take the above hemin solution and cellulose solution, add the hemin solution into the cellulose solution and mix evenly; then heat and stir, and stop heating when the reaction is over; after the solution is naturally cooled, add deionized water, mix After uniformity, the regenerated cellulose was obtained by centrifugation, and then washed th...

Embodiment 3

[0038] The preparation method of modified cellulose, comprises the steps:

[0039] (1) Dissolution of cellulose;

[0040] Weigh 8.0g of LiC1 and 92.0g of DMSO, add them into a beaker to dissolve and prepare an 8% LiC1-DMSO mixed solution; weigh 1.0g of pineapple leaf cellulose powder and add it to the LiC1-DMSO mixed solution, and stir with a stirrer until Fully dissolved to obtain a cellulose solution;

[0041] (2) Dissolution of hemin;

[0042] Weigh 0.30 hemin, add it into DMSO solvent, and stir at the same time when adding, until the hemin is fully dissolved to obtain hemin;

[0043] (3) Preparation of modified cellulose;

[0044] Take the above hemin solution and cellulose solution, add the hemin solution into the cellulose solution and mix evenly; then heat and stir, and stop heating when the reaction is over; after the solution is naturally cooled, add deionized water, mix After uniformity, the regenerated cellulose was obtained by centrifugation, and then washed th...

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PUM

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Abstract

The invention relates to the technical field of synthetic fibers, in particular to a modified cellulose preparation method. The modified cellulose preparation method comprises the following steps of 1, cellulose dissolving; 2, hemin dissolving; 3, modified cellulose preparation. By means of a scanning electron microscope, it is observed that after cellulose homogeneous modification, a large amountof particulate matter appears on the surface, the surface is broken, and protrusions are increased. Infrared spectroscopy detects that a C=C absorption peak of hemin appears on modified cellulose, acommon absorption band of ester carbonyl and carboxylic acid carbonyl is generated, and it is indicated that pineapple leaf cellulose is subjected to an esterification reaction. In addition, it is found through the specific surface area and pore structure analysis that the specific surface area of the modified cellulose is significantly increased, hole structure distribution is dispersed, and themodified cellulose can adsorb formaldehyde more conveniently by increasing the specific surface area.

Description

technical field [0001] The invention relates to the technical field of synthetic fibers, in particular to a preparation method of modified cellulose. Background technique [0002] Formaldehyde is the number one pollutant of indoor air pollution, which is harmful to human health. The commonly used methods for purifying indoor formaldehyde mainly include: ventilation, green plant purification, photocatalysis, air negative ion method and adsorption method. It is the most economical and convenient method to remove indoor formaldehyde gas by adsorption. The adsorption method is divided into physical adsorption and chemical adsorption. Physical adsorption is a process in which an adsorbent with a large specific surface area and a microporous structure uses van der Waals force to adsorb gas molecules; chemical adsorption is a chemical reaction between the surface of the adsorbent and the adsorbed molecules. process, in which oxygen-containing functional groups were shown to have ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01D53/02C08B15/00C08B3/00
CPCB01J20/24B01D53/02B01D2257/70B01J20/3085B01J2220/4825C08B3/00C08B15/00
Inventor 卓睛睛
Owner 卓睛睛