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Preparation method, product and application of porous fibers with oriented pore structures

A technology of porous fiber and pore structure, which is applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of limiting the application of porous fiber and the inability to realize continuous large-scale preparation, and achieve excellent heat insulation performance and preparation method simple effect

Inactive Publication Date: 2019-07-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the traditional directional freezing method cannot achieve continuous large-scale preparation due to the limitation of its mold. For the occasions that require large-scale continuous preparation of porous fibers, this shortcoming severely limits the application of directional freezing method to prepare porous fibers.

Method used

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  • Preparation method, product and application of porous fibers with oriented pore structures
  • Preparation method, product and application of porous fibers with oriented pore structures
  • Preparation method, product and application of porous fibers with oriented pore structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Cut 4.5g of natural cocoons, boil and dry in 1% sodium carbonate solution, dissolve in 20ml of 9mol / ml lithium bromide solution, dialyze for 24h to prepare 22.5% silk protein solution.

[0046] Dissolve 0.5g of chitosan powder in 10ml of 1% acetic acid solution, stir at 800rpm / min for 30min to mix evenly, and prepare 5% chitosan solution.

[0047] Mix 20ml of silk protein solution and 10ml of chitosan solution evenly, and centrifuge to remove air bubbles to obtain a homogeneous solution, wherein the mass ratio of silk protein to chitosan is 9:1.

[0048] (2) Put the mixed solution in the syringe, extrude the solution through the extrusion pump, place the copper ring in a low-temperature reaction bath (-100°C), and pass the solution through the copper ring for freezing-spinning process, and the frozen Motorized collection of fibers

[0049] (3) Freeze-dry the frozen fiber obtained in step (2) for 24h to remove the solvent to obtain a porous fiber with an oriented po...

Embodiment 2

[0053] (1) Cut 4.5g of natural cocoons, boil and dry in 1% sodium carbonate solution, dissolve in 20ml of 9mol / ml lithium bromide solution, dialyze for 24h to prepare 22.5% silk protein solution.

[0054] Dissolve 0.5g of chitosan powder in 10ml of 1% acetic acid solution, stir at 800rpm / min for 30min to mix evenly, and prepare 5% chitosan solution.

[0055] After mixing 20ml of silk protein solution and 10ml of chitosan solution evenly, centrifuge to remove air bubbles to obtain a homogeneous solution, wherein the mass ratio of silk protein to chitosan is 9:1.

[0056] (2) Put the mixed solution in the syringe, extrude the solution through the extrusion pump, place the copper ring in a low temperature reaction bath (-40, -60, -80, -100°C respectively), and pass the solution through the copper ring Freezing-spinning process, and the frozen fibers are collected by motor.

[0057] (3) Freeze-drying the frozen fiber obtained in step (2) for 24 hours to remove the solvent to obta...

Embodiment 3

[0061] (1) Cut 4.5g of natural cocoons, boil and dry in 1% sodium carbonate solution, dissolve in 20ml of 9mol / ml lithium bromide solution, dialyze for 24h to prepare 22.5% silk protein solution.

[0062] Dissolve 0.5g of chitosan powder in 10ml of 1% acetic acid solution, stir at 800rpm / min for 30min to mix evenly, and prepare 5% chitosan solution.

[0063] Dissolve 0.01g of carbon nanotube powder in 10ml of 1% sodium dodecylbenzenesulfonate solution, mix 20ml of silk protein solution, 10ml of chitosan solution and 20ml of carbon nanotube solution, and centrifuge to remove air bubbles to obtain A homogeneous solution, wherein the mass ratio of silk protein to chitosan is 9:1, and the mass ratio of silk protein to carbon nanotubes is 225:1.

[0064] (2) Put the mixed solution in the syringe, extrude the solution through the extrusion pump, place the copper ring in a low-temperature reaction bath (the temperature is -100°C), pass the solution through the copper ring for freezin...

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Abstract

The invention relates to a preparation method, a product and application of porous fibers with oriented pore structures. The preparation method comprises the following steps: 1) mixing a silk proteinsolution with a chitosan solution to prepare a mixed solution; 2) carrying out solution spinning on the mixed solution, carrying out directional freezing during spinning, and collecting fibers; and 3)freeze-drying the fibers to remove ice crystals to obtain the porous fibers with the oriented pore structures. According to the preparation method, by combining directional freezing and solution spinning, the pore structures of the obtained porous fibers are oriented, so that the porous fibers have excellent heat insulation performance and electric heating performance.

Description

technical field [0001] The invention relates to the field of preparation of porous fibers, in particular to a preparation method, product and application of a porous fiber with an oriented pore structure. Background technique [0002] Thermal insulation material is a material that can block the transfer of heat flow, also known as thermal insulation material. Traditional insulation materials, such as glass fiber, asbestos, rock wool, silicate, etc. New insulation materials, such as airgel felt, vacuum panels, etc. Continuous solar radiation will cause the surface temperature of the object to be too high, which will accelerate the corrosion, aging and degradation of the material, making it difficult to maintain good mechanical and chemical properties. [0003] Although there are many cooling and refrigeration equipments in existence, they cause energy loss and cost increase to a large extent. Therefore, the ability to prevent heat from entering the heat insulation material...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/24D01F8/02D01F8/18
CPCD01D5/00D01D5/24D01F8/02D01F8/18D10B2505/00
Inventor 柏浩崔滢高微微王玉洁李德文龚华鑫
Owner ZHEJIANG UNIV
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