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A kind of continuous cellulose airgel fiber and its preparation method

A technology for aerogel fibers and gel fibers, which is applied in the field of aerogel fiber research and development, can solve the problems of difficulty in spinning cellulose aerogels into fibers, and achieves simple preparation process, reduced solvent consumption, and good spinnability. Effect

Active Publication Date: 2019-01-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a continuous cellulose airgel fiber and its preparation method, which has the characteristics of cheap and easy-to-obtain raw materials, simple preparation process, green and pollution-free, and good spinnability, and solves the problem of cellulose Airgel is difficult to spin into fibers

Method used

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  • A kind of continuous cellulose airgel fiber and its preparation method
  • A kind of continuous cellulose airgel fiber and its preparation method
  • A kind of continuous cellulose airgel fiber and its preparation method

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Effect test

Embodiment 1

[0036] A kind of preparation method of continuous cellulose airgel fiber, concrete steps are:

[0037] Bacterial cellulose (Hainan Yide Food Co., Ltd., crushed coconut) was dispersed in a dispersant at -12°C to obtain a spinning stock solution, in which the mass fraction of bacterial cellulose was 7%, mechanically stirred for 30 minutes, and centrifuged Machine 10000r / min carries out defoaming treatment 20min; Described dispersant is the solution that NaOH and thiourea are dissolved in water and forms, and wherein, the mass fraction of NaOH is 9.5%, and the mass fraction of thiourea is 4.5%; Spinning The stock solution is extruded into a coagulation bath for wet spinning at normal temperature and pressure to obtain cellulose gel fibers; the coagulation bath is an aqueous acetone solution with a volume fraction of 10%; the extrusion speed of the spinning stock solution is 2.4m / min; After winding the cellulose gel fiber in the coagulation bath at a winding speed of 6m / min, immer...

Embodiment 2

[0040] A kind of preparation method of continuous cellulose airgel fiber, concrete steps are:

[0041] Bacterial cellulose (Hainan Yide Food Co., Ltd., shredded compressed coconut, processed by a homogenizer) was dispersed in a dispersant at -8°C to obtain a spinning stock solution, in which the mass fraction of bacterial cellulose was 2%, and mechanically Stir vigorously for 30 minutes, and perform degassing treatment with a centrifuge at 10000r / min for 20 minutes; the dispersant is a solution formed by dissolving NaOH, urea and thiourea in water, wherein the mass fraction of NaOH is 7%, and the mass fraction of urea The mass fraction of thiourea is 8%, and the mass fraction of thiourea is 10%; the spinning stock solution is extruded into a coagulation bath for wet spinning at normal temperature and pressure to obtain cellulose gel fibers; the coagulation bath is a volume fraction of 10% % ethanol aqueous solution; the extrusion speed of the spinning stock solution is 0.6m / mi...

Embodiment 3

[0044] A kind of preparation method of continuous cellulose airgel fiber, concrete steps are:

[0045] Disperse the treated cotton pulp cellulose (Yanling County Dilun Textile Co., Ltd., DP=550, the processing method is: the cellulose cotton pulp is mechanically crushed, washed with water and ethanol several times, and then dried in a vacuum oven at 50°C) In the dispersant at -10°C, the spinning stock solution was obtained, wherein the mass fraction of cotton pulp cellulose was 7%, stirred vigorously for 30 minutes, and degassed for 20 minutes with a centrifuge at 10000r / min; the dispersant was NaOH , urea and thiourea are dissolved in water to form a solution, wherein the mass fraction of NaOH is 8%, the mass fraction of urea is 8%, and the mass fraction of thiourea is 6.5%; the spinning dope is extruded into a coagulation bath at room temperature Perform wet spinning under normal pressure to obtain cellulose gel fibers; the coagulation bath is an aqueous ethanol solution wit...

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Abstract

The invention provides a continuous cellulose aerogel fiber and a preparation method thereof. The preparation method comprises the following steps: dispersing cellulose into a dispersing agent so as to obtain a spinning stock solution; extruding the spinning stock solution into a coagulating bath for wet-method spinning so as to obtain cellulose aerogel fiber; winding the cellulose aerogel fiber in the coagulating bath, and soaking into an aging liquid for aging; washing the aged cellulose aerogel fiber till the pH is neutral, and drying, so as to obtain the continuous cellulose aerogel fiber. The preparation method provided by the invention has the characteristics that raw materials are cheap and easy to obtain, the preparation process is simple, green and pollution-free, the continuous cellulose aerogel fiber is good is spinnability, and the problem that cellulose aerogel is hard to spin into fiber is solved. The diameter of the cellulose aerogel fiber provided by the invention is smaller than 120 [mu]m, the cellulose aerogel fiber has the characteristics of high specific surface area (greater than or equal to 88m<2> / g), high porosity (greater than or equal to 85%), and low density (less than or equal to 0.2 / cm<3>), meanwhile the fiber specific surface area can be adjusted, and the cellulose aerogel fiber can be used in fields such as functional clothes, sensing, catalyst loading and adsorption filtration, cosmetics and biological treatment.

Description

technical field [0001] The invention relates to the field of airgel fiber research and development, in particular to a continuous cellulose airgel fiber and a preparation method thereof. Background technique [0002] Airgel is a nanoporous solid material with a three-dimensional network structure, which is filled with gas (usually air) in the pores and network structure of the solid matrix. Because of its excellent characteristics such as large specific surface area, high porosity, low bulk density and thermal conductivity, aerogels have huge potential applications in many fields such as thermal insulation, catalysis, energy, adsorption, aerospace and so on. Aerogels are divided into inorganic aerogels and organic aerogels. Compared with fragile inorganic aerogels, organic aerogels have better mechanical properties and good flexibility. [0003] As a new type of organic airgel, cellulose airgel not only has good mechanical properties and flexibility, but also has the widest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/02D01F1/10D01D1/02D01D5/06
CPCD01D1/02D01D5/06D01F1/10D01F2/02
Inventor 朱美芳张君妍陈文萍孟思江晓泽王浩
Owner DONGHUA UNIV
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