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A kind of preparation method of electrostatic spraying polyacetylene particles

A polyacetylene particle, electrostatic spraying technology, applied in the field of electrospinning, can solve problems such as morphology limitation, and achieve the effect of uniform particle size distribution and good dispersibility

Active Publication Date: 2021-03-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the morphology of chiral helical polymer particles is mainly limited to spherical, and there are few studies on non-spherical chiral helical polymer particles.

Method used

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  • A kind of preparation method of electrostatic spraying polyacetylene particles
  • A kind of preparation method of electrostatic spraying polyacetylene particles
  • A kind of preparation method of electrostatic spraying polyacetylene particles

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[0033] The preparation method for preparing helical substituted polyacetylene particles of the present invention comprises the following steps:

[0034] Preparation of chiral helical polymers PFA, PSA, PFCM and achiral helical polymers PX, PPA, and copolymers of FA and PA poly(FA x -co-PA y ), the subscripts x, y represent the different molar copolymerization ratios of the respective monomers (x: 2 ~ 8, y: 8 ~ 2), and the blend PFA of PFA and PPA x -b-PPA y , the subscripts x, y represent different blending mass ratios of polymers (x: 2~8, y: 8~2);

[0035] Prepare the electrospray solution of the polymer: respectively dissolve the prepared polymer in the organic solvent, stir until dissolved by magnetic force, and obtain the polymer electrospray solution with different concentrations (10-40wt%);

[0036] Electrostatic spray equipment preparation: mainly including needles, propulsion pumps, receiving boards, high-voltage power supplies, syringes, etc.;

[0037] Preparation...

Embodiment 1

[0040] The embodiment of the present invention provides a method for preparing helically substituted polyacetylene particles by electrostatic spraying method. The specific operation steps include: dissolving 30%wt PFA in an appropriate amount of DMF solvent, and magnetically stirring for a period of time until dissolved to obtain homopolymer-containing Electrospray solution of substances.

[0041] Add the polymer electrospray solution obtained above into the syringe of the electrostatic spray equipment, control the electrospray parameters such as voltage and propulsion speed, and continue to stably electrospray for a period of time to obtain spherical PFA particles. Operating parameters of electrostatic spraying: positive electrode voltage of EFI is 7-9kV, negative electrode voltage of EFI is -2kV, distance from spinneret to receiving plate is 16cm, temperature is 30°C, humidity is 35%, and propulsion speed is 0.004mL / min.

Embodiment 2

[0043] The embodiment of the present invention provides a method for preparing helically substituted polyacetylene particles by electrostatic spraying method. The specific operation steps include: dissolving 20%wt PPA in an appropriate amount of OX solvent, stirring for a period of time until dissolved by magnetic force, and obtaining Electrospray solution of substances.

[0044] Add the polymer electrospray solution obtained above into the syringe of the electrostatic spray equipment, control the electrospray parameters such as voltage and propulsion speed, and continue to stably electrospray for a period of time to obtain non-spherical bowl-shaped PPA particles. Operating parameters of electrostatic spraying: positive electrode voltage of EFI is 7-9kV, negative electrode voltage of EFI is -2kV, distance from spinneret to receiving plate is 16cm, temperature is 30°C, humidity is 35%, and propulsion speed is 0.004mL / min.

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Abstract

The invention discloses a method for preparing electrostatic spraying polyacetylene particles and belongs to the field of electrostatic spinning. According to the method, an electrostatic spraying technology is utilized, a helix substituted acetylene polymer polyphenylene (PPA) and helix substituted propyne polymers (PFA (perfluoroalkoxy), PSA (polysulfonamide), PCFM, PX (para xylene)) are adoptedas representatives, and polyacetylene particles with uniform particle size distribution can be prepared by controlling the concentration of a polymer electrostatic spraying solution and adjusting related electrostatic spraying parameters. In order to further enrich the types and preparation methods of the polyacetylene particles, a copolymer of two monomers (FA / PA) copolymer and a comixture of polymers (PFA / PPA) of the monomers are further adopted for electrostatic spraying, by adjusting a copolymer composition ratio and a comixture composition ratio, structures, morphologies and chiral properties of particles can be adjusted, and multiple types of morphology adjustable polymer particles can be prepared. The method is simple to operate, uniform in particle size distribution, good in dispersibility and good in applicability.

Description

technical field [0001] The invention relates to the preparation of polyyne particles and the regulation of particle morphology, which is a method for preparing a series of polyyne particles with specific shapes by using electrostatic spray technology, and belongs to the field of electrostatic spinning. Background technique [0002] Chirality is a common feature in nature and plays an indispensable role in the generation and evolution of life. The so-called chirality refers to the characteristic that an object and its mirror image cannot overlap. The so-called chiral molecule refers to the molecule whose configuration and its mirror image cannot overlap. In recent years, chirality and related research topics (such as the synthesis of chiral drugs, chiral separation, chiral materials, etc.) have attracted more and more attention. Among them, chiral particles have the advantages of large specific surface area, strong dispersion ability, good processing performance, controllab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/14C08L49/00
CPCC08J3/122C08J2349/00
Inventor 邓建平李鹏鹏潘明潘凯
Owner BEIJING UNIV OF CHEM TECH
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