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Preparation method of superhydrophobic porous fibers with oriented pore structure, superhydrophobic porous fibers with oriented pore structure and application thereof

A porous fiber and super-hydrophobic technology, which is applied in the field of preparation of super-hydrophobic porous fibers, can solve the problems of limiting the application of porous fibers, unable to achieve continuous large-scale preparation, and not having super-hydrophobic properties.

Active Publication Date: 2019-11-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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.
In addition, even with directional freezing methods, the prepared materials themselves often do not possess superhydrophobic properties.

Method used

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  • Preparation method of superhydrophobic porous fibers with oriented pore structure, superhydrophobic porous fibers with oriented pore structure and application thereof
  • Preparation method of superhydrophobic porous fibers with oriented pore structure, superhydrophobic porous fibers with oriented pore structure and application thereof
  • Preparation method of superhydrophobic porous fibers with oriented pore structure, superhydrophobic porous fibers with oriented pore structure and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (1) Cut 4.5g of natural cocoons, boil and dry in 1% sodium carbonate solution, dissolve in 20ml of 9mol / ml lithium bromide solution, and dialyze for 24h to prepare a 22.5% silk protein solution.

[0089] Dissolve 0.5 g of chitosan powder in 10 ml of 1% acetic acid solution, stir for 30 min at a speed of 800 rpm / min to make it evenly mixed, and prepare a chitosan solution with a concentration of 50 mg / ml.

[0090] 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.

[0091] (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 The fibers are collected with a motor.

[0092] (3) Freeze-dry the frozen fiber obtained in step (2) for...

Embodiment 2

[0096] (1) Cut 4.5g of natural cocoons, boil and dry in 1% sodium carbonate solution, dissolve in 20ml of 9mol / ml lithium bromide solution, and dialyze for 24h to prepare a 22.5% silk protein solution.

[0097]Dissolve 0.5 g of chitosan powder in 10 ml of 1% acetic acid solution, stir for 30 min at a speed of 800 rpm / min to make it evenly mixed, and prepare a chitosan solution with a concentration of 50 mg / ml.

[0098] 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.

[0099] (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.

[0100] (3) Freeze-drying the frozen fiber o...

Embodiment 3

[0105] (1) Cut 4.5g of natural cocoons, boil and dry in 1% sodium carbonate solution, dissolve in 20ml of 9mol / ml lithium bromide solution, and dialyze for 24h to prepare a 22.5% silk protein solution.

[0106] Dissolve 0.5 g of chitosan powder in 10 ml of 1% acetic acid solution, stir for 30 min at a speed of 800 rpm / min to make it evenly mixed, and prepare a chitosan solution with a concentration of 50 mg / ml.

[0107] 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.

[0108] (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 freezing-spinning process, and freeze The final fiber is collected by motor.

[0109] (3) Freeze-drying the frozen fiber obtai...

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Abstract

The invention relates to a preparation method of superhydrophobic porous fibers with oriented pore structure, superhydrophobic porous fibers with oriented pore structure and application thereof. The preparation method comprises: preparing a spinning solution; performing spinning with the spinning solution, with directional freezing carried out while spinning, and collecting frozen fibers; removingice crystal from the frozen fibers; and performing surface superhydrophobic treatment on the porous fibers. the porous fibers with oriented pore structure are prepared by the combination of directional freezing and the spinning solution; the surface superhydrophobic treatment is performed on the porous fibers so that excellent heat insulation and superhydrophobic property are imparted to the porous fibers.

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 superhydrophobic porous fiber with an oriented pore structure. Background technique [0002] Oriented freezing is a method of using temperature gradients to influence and control the movement and assembly of raw materials to obtain porous materials with oriented structures. In recent years, many types of porous materials with oriented structures have been successfully prepared by directional freezing. Deville et al. (S.Deville, E.Saiz, A.P.Tomsia, Biomaterials 2006, 27, 5480.) successfully prepared the scaffold material of hydroxyapatite, and the existence of the orientation structure makes this material have greater compression than other structures strength. Wicklein et al. (B.Wicklein, A.Kocjan, G.Salazar-Alvarez, F.Carosio, G.Camino, M.Antonietti, L. Bergstrom, Nat.Nanotechnol.2014,10,27791) prepared by direction...

Claims

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Application Information

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IPC IPC(8): D01F8/02D01F8/18D01F11/00D01F11/02D01F2/28D01F9/00D01F6/52D01F11/06D01F11/08D01F6/94D01F6/74
CPCD01F2/28D01F6/52D01F6/74D01F6/94D01F8/02D01F8/18D01F9/00D01F11/00D01F11/02D01F11/06D01F11/08
Inventor 柏浩邵子钰
Owner ZHEJIANG UNIV
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