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Electrostatic spinning equipment with controllable environmental parameters under physical and chemical synergistic effect

A technology of synergy and environmental parameters, applied in fiber processing, textile and papermaking, filament/thread forming, etc. silk effect

Inactive Publication Date: 2021-02-05
ZHEJIANG SCI-TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide an electrospinning equipment with controllable environmental parameters by physical and chemical synergy, solve the problem of uncontrollable temperature and humidity in the spinning process, improve the existing electrospinning equipment, and significantly improve The temperature and humidity of the spinning environment can promote the spinnability of nanofibers and improve the fiber morphology, which has the prospect of industrial application

Method used

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  • Electrostatic spinning equipment with controllable environmental parameters under physical and chemical synergistic effect
  • Electrostatic spinning equipment with controllable environmental parameters under physical and chemical synergistic effect
  • Electrostatic spinning equipment with controllable environmental parameters under physical and chemical synergistic effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The spinning conditions are: 10wt% polyvinylidene fluoride (PVDF), 0.5wt% SiO 2 , the solvent used is dimethylformamide (DMF), the conductivity of the spinning solution is 1.8 μS / cm, and the viscosity is 747 mPa·s. The spinning voltage is 15kv, the speed of the receiving roll is 110rad / min, the receiving distance is 11cm, and the spinning is carried out in natural environment. The humidity measured by the thermo-hygrometer was 70%, and the temperature was 38°C.

[0059] The spinning results are as follows: figure 2 shown. When physical and chemical synergistic dehumidification is not used, the humidity is high before spinning, and during the spinning process, due to the presence of spinning solvent, the humidity in the spinning environment continues to increase. When spinning in a high-humidity environment, the solvent is difficult to volatilize, and the fibers will be beaded and agglomerated due to incomplete volatilization of the solvent. The pore structure betwee...

Embodiment 2

[0061] The spinning conditions are: 10wt% polyvinylidene fluoride (PVDF), 0.5wt% SiO 2 , the solvent used is dimethylformamide (DMF), the conductivity of the spinning solution is 1.8 μS / cm, and the viscosity is 747 mPa·s. The spinning voltage is 15kv, the rotational speed of the receiving roll is 110rad / min, and the receiving distance is 11cm. When only physical dehumidification is used, the humidity measured by a thermo-hygrometer is 36-40%, and the temperature in the spinning environment is 36°C.

[0062] The spinning results are as follows: Before spinning, physical dehumidification is used for dehumidification. Under continuous dehumidification, it is found that the humidity has not completely decreased to below 20% or lower. In this case, electrospinning was carried out, and as the spinning process continued, due to the action of the spinning solvent, it was found that the humidity gradually increased to 36-40%, and the temperature in the spinning environment was 36°C. ...

Embodiment 3

[0064] The spinning conditions are: 10wt% polyvinylidene fluoride (PVDF), 0.5wt% SiO 2 , the solvent used is dimethylformamide (DMF), the conductivity of the spinning solution is 1.8 μS / cm, and the viscosity is 747 mPa·s. The spinning voltage is 15kv, the rotational speed of the receiving roll is 110rad / min, and the receiving distance is 11cm. When only physical dehumidification is used, the humidity measured by a thermo-hygrometer is 38-40%, and the temperature in the spinning environment is 37°C.

[0065] The spinning results are as follows: Before spinning, chemical dehumidification is used for dehumidification. Under continuous dehumidification, it is found that the humidity has not completely decreased to below 20% or lower. In this case, electrospinning is carried out, and as the spinning process continues, due to the action of the spinning solvent, it is found that the humidity is also increasing, reaching 38-40%, and the temperature in the spinning environment is 37°C...

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Abstract

The invention relates to electrostatic spinning equipment with controllable environmental parameters under physical and chemical synergistic effect. The equipment systematically improves the defects of uncontrollable environmental parameters of the existing electrostatic spinning, carries out dehumidification through physical and chemical synergistic effect, and jointly and accurately controls thetemperature and humidity of spinning through the synergistic effect of heating and dehumidification. Before spinning, a physical / chemical synergistic dehumidification unit and a physical heating unitare started at the same time, the synergistic effect of physical / chemical dehumidification and physical heating is adopted, the humidity of the spinning environment can be effectively reduced, and the temperature can be improved. With the continuous proceeding of the spinning process, even if a spinning solvent exists in the spinning environment, the humidity can be effectively removed, so that the humidity in the spinning environment is constant at a lower degree, and smooth spinning is facilitated. Therefore, the fiber morphology is greatly improved, the formation of caking, bonding and beads is avoided, the residue of the solvent on the nano-film is reduced, the pore structure can be regulated and controlled, the material performance can be improved, the production efficiency is remarkably improved, and reference is provided for industrial application.

Description

technical field [0001] The invention relates to an electrospinning device with controllable environmental parameters by physicochemical synergy. Background technique [0002] Electrospinning technology is a new technology for preparing nanofibers by using electric field force as traction force. The polymer solution or melt used to prepare nanofibers is charged with high-voltage static electricity of thousands or even hundreds of thousands of volts through a high-voltage DC power supply. Then, in the electric field formed by the high-voltage DC power supply, the charged polymer solution will form a Taylor cone at the spinneret of the electrospinning device due to the electric field force. As the voltage is continuously increased by using a high-voltage DC power supply, the electric field strength in the electrostatic field will gradually increase, and the polymer droplet will be accelerated by the electric field force formed by the electrostatic field at the apex of the Taylo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00
CPCD01D5/0061D01D5/0069
Inventor 冯建永曾湘森李圣泉张凌霄王文富
Owner ZHEJIANG SCI-TECH UNIV