Preparation method of flexible composite nanofiber membrane with core-shell structure

A technology of composite nanofibers and shell structures, which is applied in the chemical characteristics of fibers, rayon manufacturing, and conjugated synthetic polymer rayon filaments, etc., can solve problems such as cumbersome steps, achieve good high temperature resistance, and reduce end effects.

Pending Publication Date: 2022-01-28
佛山(华南)新材料研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are relatively cumbersome due to cumbersome steps, while coaxial electrospinning technology can relatively easily prepare nanofibers with a core-shell structure.

Method used

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  • Preparation method of flexible composite nanofiber membrane with core-shell structure
  • Preparation method of flexible composite nanofiber membrane with core-shell structure
  • Preparation method of flexible composite nanofiber membrane with core-shell structure

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preparation example Construction

[0032] The preparation method of the flexible composite nanofiber membrane of the core-shell structure of the present invention comprises:

[0033] In step 101, ethyl orthosilicate, pure water, absolute ethanol and anhydrous acetic acid are mixed and stirred until clear to obtain a silicon source solution. Wherein, anhydrous acetic acid is used as hydrolysis reaction catalyst.

[0034] Specifically, in one embodiment, tetraethyl orthosilicate, pure water, absolute ethanol, and anhydrous acetic acid are placed in a conical flask in a molar ratio of 1:0.6:0.6:0.01 for sealed mixing. Stir at 45°C for 4-6h to obtain a clear silicon source solution.

[0035] Among them, the molecular weight of ethyl orthosilicate is 208.33.

[0036] Step 102, dissolving the high molecular polymer in a solvent to prepare a high molecular polymer solution.

[0037] In one embodiment, the high molecular polymer is dissolved in a solvent at a mass concentration of 10%-20%, and stirred in a water bat...

Embodiment 1

[0056] Step 1101, weigh 10 g of tetraethyl orthosilicate, place it in an Erlenmeyer flask filled with 12 g of pure water and 5 g of ethanol, add 0.5 g of anhydrous acetic acid dropwise while stirring, seal and mix, and place in a water bath at 45°C Next, stir for 5h to obtain a clear silicon source solution.

[0057] Step 1201, weigh 2.2 g of polyvinyl alcohol (PVA) type 124, dissolve it in 19.8 g of pure water, and stir at 85° C. for 5 hours to prepare a polyvinyl alcohol solution.

[0058] Step 1301, weigh 6 g of zirconium oxychloride, dissolve it in 14 g of absolute ethanol to obtain a 30 wt % ethanol solution of zirconium oxychloride, add dropwise 2.4 g of anhydrous acetic acid, and stir at room temperature for 4 h, A zirconium source solution is prepared.

[0059] In step 1401, the prepared silicon source solution and polyvinyl alcohol solution are stirred and mixed evenly at room temperature at a mass ratio of 1:1, and left to age to obtain a silicon source spinning sol...

Embodiment 2

[0066] Step 2101, weigh 10 g of tetraethyl orthosilicate, place it in a conical flask filled with 6 g of pure water and 6 g of ethanol, add 0.1 g of anhydrous acetic acid dropwise while stirring, and mix in a water bath at 45°C , and stirred for 4h to obtain a clear silicon source solution.

[0067] Step 2201, weigh 2.2 g of polyvinyl alcohol (PVA) type 124, dissolve it in 19.8 g of pure water, and stir at 85° C. for 5 hours to prepare a polyvinyl alcohol solution.

[0068] Step 2301, weigh 2.5 g of zirconium oxychloride, dissolve it in 7.5 g of absolute ethanol to obtain a 25 wt % ethanol solution of zirconium oxychloride, add dropwise 0.8 g of anhydrous acetic acid, and stir at room temperature 4h to prepare the zirconium source solution.

[0069] In step 2401, the prepared silicon source solution and polyvinyl alcohol solution are stirred and mixed evenly at room temperature at a mass ratio of 1:0.8, and left to age to obtain a silicon source spinning solution as a core sp...

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Abstract

The invention discloses a preparation method of a flexible composite nanofiber membrane with a core-shell structure, the preparation method comprises the following steps: mixing tetraethoxysilane, pure water, absolute ethyl alcohol and anhydrous acetic acid, and stirring until the mixture is clear to prepare a silicon source solution; dissolving a high-molecular polymer in a solvent to prepare a high-molecular polymer solution; preparing an absolute ethyl alcohol solution of zirconium oxychloride, adding anhydrous acetic acid, and stirring at normal temperature until the solution is clear to prepare a zirconium source solution; mixing and stirring the prepared silicon source solution and the prepared high-molecular polymer solution in a water bath, mixing and stirring the prepared zirconium source solution and the prepared high-molecular polymer solution in a water bath, and respectively standing and aging to prepare a silicon source spinning solution and a zirconium source spinning solution; carrying out coaxial electrostatic spinning by taking the silicon source spinning solution as a core spinning solution and the zirconium source spinning solution as a shell spinning solution to prepare a flexible composite nanofiber membrane precursor with a core-shell structure; and sintering the flexible composite nanofiber membrane precursor with the core-shell structure to prepare the flexible composite nanofiber membrane with the core-shell structure.

Description

technical field [0001] The invention relates to the field of oxide composite nanomaterials, in particular to a method for preparing a flexible composite nanofiber membrane with a core-shell structure. Background technique [0002] In recent years, due to the special structure of one-dimensional inorganic nanomaterials with superior photoelectric, physical, and chemical properties than bulk materials, there has been great fundamental research in the fields of sensors, biological scaffold materials, photocatalysts and carrier materials, and hydrogen storage materials. and potential application value. [0003] Nano-ZrO 2 With high melting point, high resistivity, high refractive index and thermal expansion coefficient, it is a high-quality structural functional material that can be used in an ultra-high temperature oxidizing atmosphere for a long time. It is used as a basic raw material in the fields of aerospace military industry, energy saving and emission reduction, and com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4382D04H1/4318D04H1/4309D04H1/43D04H1/4282D01F8/10D01F1/10
CPCD04H1/728D04H1/43828D04H1/4318D04H1/4309D04H1/43D04H1/4282D01F8/10D01F1/10
Inventor 袁键礼陈善良李顺邓伟罗睿杰刘勇
Owner 佛山(华南)新材料研究院
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