Porous nano-fiber prepared by combining electrostatic spinning with anti-solvent technology and preparing method

An electrospinning and nanofiber technology, which is applied in fiber processing, fiber chemical characteristics, filament/thread forming, etc., can solve the problems of complex preparation process of porous nanofibers, poor mechanical properties, and high requirements for spinning environment, and achieve the goal of spinning Small silk environmental requirements, simple preparation method, high specific surface area effect

Active Publication Date: 2015-09-23
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of electrostatic spinning combined with anti-solvent technology to prepare porous nanofibers and its preparation method, which solves the problems of complex preparation process of porous nanofibers, poor mechanical properties and high requirements for spinning environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Prepare porous polystyrene nanofibers, the specific steps are as follows:

[0048] Add 6.93 g of spinnable polymer polystyrene into 10 mL of dimethylformamide solvent, and mix evenly to obtain a polymer spinning solution.

[0049] Put the polymer spinning solution into the propeller of the electrospinning machine, adjust the electrospinning voltage to 30kv, the propulsion speed to 0.023mL / min, the spinning temperature to 0°C, and the humidity to 40%, and the electrospinning to obtain a liquid The fibers were collected in a container filled with 100ml of saturated sodium chloride solution, the receiving distance was 30cm, and after reacting for 1min, polymer nanofibers were obtained.

[0050] The obtained polymer nanofibers are placed in a dryer, the drying temperature is set at -50° C., the air pressure is adjusted at 10 Pa, and the porous polystyrene nanofibers are obtained after drying the fibers for 12 hours.

Embodiment 2

[0052] Prepare porous polyacrylonitrile nanofibers, the specific steps are as follows:

[0053] Add 1.68 g of spinnable polymer polyacrylonitrile into 5 mL of chloroform and 5 mL of dimethyl sulfoxide mixed solvent, and stir evenly to obtain a polymer spinning solution;

[0054] Put the polymer spinning solution into the propeller of the electrospinning machine, adjust the electrospinning voltage to 10kv, the propulsion speed to 0.037mL / min, the spinning temperature to 25°C, and the humidity to 50%, and the electrospinning to obtain a liquid The fibers were collected in a container filled with 1000ml of 0°C water, and the receiving distance was 15cm. After reacting for 10min, polymer nanofibers were obtained.

[0055] The obtained polymer nanofibers are placed in a dryer, the drying temperature is set at 40° C., the air pressure is adjusted at 101 kpa, and the porous polyacrylonitrile nanofibers are obtained after drying the fibers for 2 hours.

Embodiment 3

[0057] Prepare porous polycaprolactone nanofibers, the specific steps are as follows:

[0058] Add 2.03 g of spinnable polymer polycaprolactone into 5 mL of dimethylformamide and 5 mL of tetrahydrofuran mixed solvent, and stir evenly to obtain a polymer spinning solution;

[0059] Put the polymer spinning solution into the propeller, adjust the electrospinning voltage to 20kv, the propulsion speed to 0.013mL / min, the spinning temperature to 40°C, and the humidity to 60%, to obtain liquid fibers by electrospinning, using a 700ml of water and ethanol mixed solution was collected in a container, the receiving distance was 20cm, and the volume ratio of water and ethanol was 1:1. After 15min of reaction, polymer nanofibers were obtained.

[0060] The obtained polymer nanofibers were placed in a dryer, the drying temperature was set at 40° C., the air pressure was adjusted at 25 pa, and the porous PS nanofibers were obtained after drying the fibers for 12 hours.

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PUM

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Abstract

The invention discloses porous nano-fiber prepared by combining electrostatic spinning with the anti-solvent technology and a preparing method. The porous nano-fiber is prepared according to the following specific steps that 1, a spinning solution is formed by mixing, by mass, 60-90% of solvent, and 10-40% of spinnable polymer, and the mass sum of the components is 100%; 2, the spinning solution is placed into a propeller of an electrostatic spinning machine for carrying out electrostatic spinning, the spinning solution is ejected from a spinning needle head to obtain liquid fiber, the liquid fiber enters a container containing anti-solvent to react with the anti-solvent, and polymer nano-fiber is obtained after reaction is finished; 3, the polymer nano-fiber is dried to obtain porous nano-fiber. The preparing method is simple, the requirement for the spinning environment is low, the mechanical property is approximate to that of common fiber, and the specific surface area is large.

Description

technical field [0001] The invention belongs to the field of nanofiber preparation, and relates to the preparation of porous nanofibers by electrospinning combined with anti-solvent technology and a preparation method. Background technique [0002] The biggest feature of nanofibers is the large specific surface area, which leads to the increase of their surface energy and activity, resulting in small size effects, surface or interface effects, quantum size effects, macroscopic quantum tunneling effects, etc., in chemistry, physics (heat, light, Electromagnetic, etc.) properties show specificity. Based on the above characteristics, nanofibers are widely used in clothing, food, medicine, energy, electronics, papermaking, aviation and other fields, and electrospinning is an important method for preparing nanofibers. [0003] In the past 10 years, people have done systematic theoretical and experimental research on electrospinning. The fibers produced by electrospinning are muc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/22D01F6/18D01F6/62D01F6/16D01F6/42D01F6/38D01F6/36D01F11/06D01F11/08D01D5/00
Inventor 汤玉斐刘照伟赵康
Owner XIAN UNIV OF TECH
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