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A method for regulating the pore structure of a nanofiber membrane

A nanofiber membrane, pore structure technology, applied in fiber processing, fiber chemical characteristics, cellulose/protein conjugated rayon and other directions, can solve the problems of difficult to control pore structure, small adjustable range of pore size, etc.

Active Publication Date: 2022-06-14
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current method for regulating the pore structure of electrospun nanofibrous membranes is generally to control the process parameters of electrospinning, which is not only difficult to control the pore structure, but also has the problem that the adjustable range of pore size is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a nanofiber membrane pore structure regulation method, which comprises the following steps:

[0024] S1, the 5g of polyvinyl alcohol was added to the 95g solvent, and heated to 95 °C to dissolve to obtain a polymer spinning solution; Wherein, the solvent is water.

[0025] S2, to the above 100g of polymer spinning solution to add 0.1g of regulator, and placed at a temperature of 50 ° C, at a speed of 500rpm for mixing and dispersion for 20min, to obtain a regulatory solution; wherein, the regulator is 20g of nano silica, polyethylene glycol 20g, myristic acid 10g, isobutyltriethoxysilion 1g, water 500g mixed obtained; In addition, the particle size of nano-silica is 50 nm, and the average molecular weight of polyethylene glycol is 400.

[0026] S3. After the above regulation solution is filtered, and then the filtrate is taken for electrospinning, the nanofiber membrane can be obtained, and the pore structure of the nanofiber membrane can be regulat...

Embodiment 2

[0028] This embodiment provides a nanofiber membrane pore structure regulation method, which comprises the following steps:

[0029] S1, 10g of ethyl cellulose, 20g of hydroxyethyl cellulose was added to 70g of solvent, and heated to 90 °C for dissolution to obtain polymer spinning solution; Wherein, the solvent is a solution of water and ethanol mixed according to the ratio of equal volume.

[0030]S2, to the above 100g of polymer spinning solution add 5g of regulator, and placed at a temperature of 70 °C, at a speed of 1500rpm for mixing and dispersion for 40min, to obtain a regulatory solution; Among them, the regulator is obtained by mixing 50g of nano-silica, 50g of polyethylene glycol, 30g of myristic acid, 10g of isobutyltriethoxysilicone, and 200g of water; In addition, the particle size of nano-silica is 150 nm, and the average molecular weight of polyethylene glycol is 1200.

[0031] S3. After the above regulation solution is filtered, and then the filtrate is taken for ...

Embodiment 3

[0033] This embodiment provides a nanofiber membrane pore structure regulation method, which comprises the following steps:

[0034] S1, 10g of polyvinylpyrrolidone was added to 90g of solvent, and heated to 92 °C to dissolve to obtain a polymer spinning solution; Wherein, the solvent is water.

[0035] S2, to the above 100g of polymer spinning solution add 1g of regulator, and placed at a temperature of 55 °C, at a speed of 800rpm for mixing and dispersion for 30min, to obtain a regulatory solution; Among them, the regulator is obtained by mixing nano-silica 25g, polyethylene glycol 25g, myristic acid 12g, isobutyltriethoxysilane 2g, water 450g; In addition, the particle size of nano-silica is 80nm, and the average molecular weight of polyethylene glycol is 600.

[0036] S3. After the above regulation solution is filtered, and then the filtrate is taken for electrospinning, the nanofiber membrane can be obtained, and the pore structure of the nanofiber membrane can be regulated. ...

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Abstract

The present invention is applicable to the technical field of nanofiber membranes, and provides a method for controlling the pore structure of nanofiber membranes, which comprises the following steps: preparing a polymer spinning solution; adding a regulator to the polymer spinning solution for mixing and dispersing to obtain regulating solution; the regulating agent includes nano silicon dioxide, polyethylene glycol, myristic acid, isobutyl triethoxy silicon, water; after filtering the regulating solution, electrospinning is carried out to obtain a nanofibrous membrane . In the present invention, after adding a regulating agent to the polymer spinning solution, and then performing electrospinning, the pore structure of the nanofiber membrane can be adjusted by adjusting the amount of the regulating agent added, so as to change the pore size and Porosity. This control method can realize the control of the pore structure of the nanofiber membrane only by changing the addition amount of the regulator, and it can realize a wide range of control of the pore size and porosity of the nanofiber membrane without changing the process parameters of electrospinning .

Description

Technical field [0001] The present invention belongs to the field of nanofiber membrane technology, in particular to a nanofiber membrane pore structure regulation method. Background [0002] At present, there are many methods used to manufacture nanofiber membranes, such as tensile method, template synthesis, self-assembly, microphase separation, electrospinning and so on. Among them, using polymers as raw materials, the use of electrospinning technology to manufacture nanofiber membranes is a relatively common method, the method of nanofiber membranes can be widely used in water filtration, oil-water separation and other fields. Among them, the pore structure of different nanofiber membranes will affect the function and use of nanofiber membranes, so it is crucial to regulate the pore structure of nanofiber membranes. [0003] However, the current method for regulating the pore structure of electrospinn nanofiber film is generally to control the process parameters of electrospi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D01F1/10D01F6/50D01F8/02D01F6/56D01F8/10
CPCD04H1/728D01D5/0015D01F1/10D01F6/50D01F8/02D01F6/56D01F8/10
Inventor 姚理荣夏勇龙啸云徐思峻潘刚伟孙启龙张成蛟
Owner NANTONG UNIVERSITY
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