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Method for preparing polyacetylene electrospun nanofibers

A nanofiber and polyacetylene electrospinning technology, applied in spinning solution preparation, fiber treatment, electrospinning, etc., can solve the problems of poor controllability of fiber material structure and shape, cumbersome preparation process, etc.

Active Publication Date: 2020-01-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has strict requirements on the preparation conditions, the preparation process is cumbersome, and the controllability of the structure and shape of the fiber material is poor.

Method used

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  • Method for preparing polyacetylene electrospun nanofibers
  • Method for preparing polyacetylene electrospun nanofibers
  • Method for preparing polyacetylene electrospun nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The embodiment of the present invention provides a method for preparing chiral polyyne nanofibers by electrospinning. The specific operation steps include: dissolving R(S)-PFA in an appropriate amount of DMF solvent, stirring magnetically for a period of time until dissolved, A spinning solution with a polyyne content of 1 g / mL was obtained.

[0038] Add the polymer spinning solution obtained above into the syringe of the electrospinning equipment, control the electrospinning parameters such as voltage and propulsion speed, and continue to electrospin stably for a period of time to obtain chiral polyyne nanofibers with uniform diameter and continuous (EF-R(S)-PFA). Electrospinning operating parameters: electrospinning positive voltage 6kV, electrospraying negative voltage -2kV, the distance from the spinneret to the receiving plate is 16cm, the temperature is 30°C, the humidity is 35%, and the propulsion speed is 0.004mL / min.

[0039] Take an appropriate amount of the ...

Embodiment 2

[0041] The embodiment of the present invention provides a method for preparing continuous polyyne nanofibers by electrospinning. The specific operation steps include: dissolving the helical substituted polyyne PX in an appropriate amount of mixed solvent (OX:CHCl 3 =4:1, volume ratio), magnetically stirred for a period of time until dissolved to obtain a spinning solution with a polyyne content of 320 mg / mL.

[0042] Add the polymer spinning solution obtained above into the syringe of the electrospinning equipment, control the electrospinning parameters such as voltage and propulsion speed, and continue to electrospin stably for a period of time to obtain continuous polyyne nanofibers (EF-PX) . Electrospinning operating parameters: electrospinning positive voltage 6kV, electrospraying negative voltage -2kV, the distance from the spinneret to the receiving plate is 16cm, the temperature is 30°C, the humidity is 35%, and the propulsion speed is 0.004mL / min.

Embodiment 3

[0044] The embodiment of the present invention provides a method for preparing chiral composite nanofibers with excellent mechanical properties by electrospinning. Dissolve PFA in an appropriate amount of DMF solvent, stir it for a period of time until it is completely dissolved, and obtain a spinning solution of composite fibers containing chiral helical substituted polyyne.

[0045] Add the polymer spinning solution obtained above into the syringe of the electrospinning equipment, control the electrospinning parameters such as voltage and propulsion speed, and continue to electrospin stably for a period of time to obtain uniform and continuous chiral composite nanofibers ( EF-PAN+R(S)-PFA). Electrospinning operating parameters: electrospinning positive voltage 6kV, electrospraying negative voltage -2kV, the distance from the spinneret to the receiving plate is 16cm, the temperature is 30°C, the humidity is 35%, and the propulsion speed is 0.004mL / min.

[0046] The composite...

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Abstract

The invention discloses a method for preparing polyacetylene electrospun nanofibers, and belongs to the field of electrostatic spinning. An electrostatic spinning technique is applied to the method, the type and content of polyacetylene in spinning solutions are controlled, and accordingly, continuous polyacetylene nanofibers of which the diameter distribution is controllable to a certain degree can be obtained. To further improve the performance of the nanofibers, a conventional electrospun high polymer is selected and then blended with the polyacetylene to obtain the composite nanofibers with excellent mechanical properties. Experimental operations involved in the method are simple. The obtained polyacetylene nanofibers are flexible, have optical activity and can be curled, thereby having high applicability.

Description

technical field [0001] The invention relates to the preparation of continuous polyyne electrospun nanofibers and the regulation and control of fiber morphology, which is a method for preparing polyyne fibers by conventional electrospinning technology, and belongs to the field of electrospinning. Background technique [0002] Inspired by the helical structure of natural macromolecules, scientists turned their attention to the research of artificially synthesized helical polymers. With the development of polymer synthesis chemistry, many helical polymers with different properties and functions have been synthesized through molecular design, such as polyisocyanide, polymethacrylate, polyacetylene chloride, polysilane and polyacetylene, etc. . In recent years, with the development and utilization of new polymerization systems and catalysts, a large number of helical polymers, especially optically active helical substituted polyynes, have been successfully synthesized and widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/26D01F8/10D01F8/08D01F8/16D01D5/00D01D1/02D01D5/30
CPCD01D1/02D01D5/003D01D5/30D01F6/26D01F8/08D01F8/10D01F8/16
Inventor 邓建平李鹏鹏高晓滨潘凯
Owner BEIJING UNIV OF CHEM TECH
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