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Preparation method of mesoporous cellulose fiber material

A cellulose fiber and cellulose technology, applied in the field of preparation of mesoporous cellulose fiber materials, can solve problems such as environmental pollution, difficulty in obtaining nanofibers, and high cost of organic solvents, and achieve resource shortage, wide application prospects, and process simple effect

Active Publication Date: 2021-12-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electrospinning is often used to prepare porous fiber materials, but most of this method needs to be carried out in strong corrosive or highly toxic solvents, such as dimethylformamide, tetrahydrofuran, dichloromethane, etc. Organic solvents are costly and difficult to obtain. Recycling, and easy to cause environmental pollution, in addition, electrospinning is difficult to obtain nanofibers separated from each other

Method used

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  • Preparation method of mesoporous cellulose fiber material
  • Preparation method of mesoporous cellulose fiber material
  • Preparation method of mesoporous cellulose fiber material

Examples

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preparation example Construction

[0030] A kind of preparation method of mesoporous cellulose fiber material of the present invention, specifically implement according to the following steps:

[0031] Configure concentrated sulfuric acid with a mass fraction of 64%, stir under a constant temperature water bath at 45-60°C, add microcrystalline cellulose after the solution temperature is stable, wherein each gram of microcrystalline cellulose corresponds to 8.75ml of sulfuric acid, and react at a stirring speed of 300-600rpm 30-45min, after the reaction is completed, pour it into 10 times the volume of deionized water to obtain the mixed solution A; let the mixed solution A stand for 12-24h, pour off the supernatant to obtain the lower milky white turbid solution, and the lower milky white The turbid liquid is centrifuged at 9000-12000rmp for 20-30min in a centrifuge to obtain a milky white suspension; put the milky white suspension into a dialysis bag for dialysis, the dialysis time is 3-6 days, replace the deio...

Embodiment 1

[0033] A kind of preparation method of mesoporous cellulose fiber material of the present invention, specifically implement according to the following steps:

[0034] Configure concentrated sulfuric acid with a mass fraction of 64%, stir under a constant temperature water bath at 45°C, add microcrystalline cellulose after the solution temperature is stable, wherein each gram of microcrystalline cellulose corresponds to 8.75ml of sulfuric acid, react at a stirring speed of 300rpm for 30min, and wait for the reaction After completion, pour it into 10 times the volume of deionized water to obtain the mixed solution A; let the mixed solution A stand for 12 hours, pour off the supernatant to obtain the lower milky white turbid solution, and centrifuge the lower milky white turbid solution through a centrifuge at 9000rmp 20min, obtain the milky white suspension; Put the milky white suspension into the dialysis bag (8KD) and carry out dialysis, the dialysis time is 3 days, every 6h re...

Embodiment 2

[0036] A kind of preparation method of mesoporous cellulose fiber material of the present invention, specifically implement according to the following steps:

[0037]Configure concentrated sulfuric acid with a mass fraction of 64%, stir under a constant temperature water bath at 45°C, add microcrystalline cellulose after the solution temperature is stable, wherein each gram of microcrystalline cellulose corresponds to 8.75ml of sulfuric acid, react at a stirring speed of 350rpm for 35min, and wait for the reaction After completion, pour it into 10 times the volume of deionized water to obtain the mixed solution A; let the mixed solution A stand for 15 hours, pour off the supernatant to obtain the lower layer of milky white turbid liquid, and centrifuge the lower layer of milky white turbid liquid through a centrifuge at 9000rmp After 23min, the milky white suspension was obtained; the milky white suspension was put into a dialysis bag (9KD) for dialysis, and the dialysis time w...

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Abstract

The invention discloses a preparation method of a mesoporous cellulose fiber material. The preparation method of the mesoporous cellulose fiber material comprises the following steps of carrying out acidolysis, centrifugation, dialysis, ultrasonic treatment and evaporation on microcrystalline cellulose to prepare a cellulose nanocrystalline material; pre-hydrolyzing tetraethoxysilane and hydrochloric acid under a water bath condition to obtain a SiO2 precursor solution; adding the SiO2 precursor solution into the cellulose nanocrystalline material, stirring at 60 DEG C for 3 hours, and evaporating at room temperature to induce self-assembly so as to obtain a mixed solution; extruding the mixed solution into a coagulating bath through an extrusion pump, soaking, washing with water, and airing to obtain a composite fiber material; and removing SiO2 from the composite fiber material with a hydrofluoric acid solution, washing with ethanol, and performing vacuum freeze drying to obtain the mesoporous cellulose fiber material. The process is simple, environment-friendly, wide in raw material source and easy to obtain oriented fibers; and the obtained mesoporous cellulose fiber material has an excellent mesoporous structure and a high specific surface area, and has a wide application prospect when being used as a functional carrier material.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of mesoporous cellulose fiber material. Background technique [0002] With the rapid development of modern industry and science and technology in the 21st century, there is an increasing demand for high-performance materials, especially high-performance fiber materials. Fiber materials not only have performance characteristics such as surface-interface properties, processability, composite composition, and functionality, but also have the advantages of wide sources of raw materials, low production costs, and easy control of production processes, making the development and manufacture of high-performance fiber materials a hotspot. The development of high-performance fiber materials is the key to the transformation and upgrading of traditional industries. However, the surface of traditional fiber materials is relatively smoot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/24D01F2/02D01F1/10C08B15/02D21C9/00
CPCD01F2/24D01F2/02D01F1/10C08B15/02D21C9/004
Inventor 程有亮赵维娜方长青陈静王莎
Owner XIAN UNIV OF TECH
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