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Preparation method of polypropylene nano fibers

A technology of nanofibers and polypropylene, which is applied in the field of preparation of organic nanofibers, can solve the problems that fiber quality is difficult to guarantee and cannot be controlled artificially

Inactive Publication Date: 2015-07-01
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The size of the fibers prepared by these nanofiber preparation methods are mostly randomly distributed in the range of 100-500 nanometers, which cannot be controlled artificially, and the size is difficult to continue to shrink, and the quality of the obtained fibers is difficult to guarantee

Method used

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  • Preparation method of polypropylene nano fibers
  • Preparation method of polypropylene nano fibers
  • Preparation method of polypropylene nano fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Preparation of Polypropylene Nanofiber Vertical Immersion Liquid Phase Epitaxy

[0018] Attached with plasma or laser beam figure 1 The lower surface shown is precisely polished to an optical grade 1 ABS rectangular substrate. The lower surface of the rectangular substrate is etched with polyvinyl chloride as a mask to form a groove with a width of 0.13 microns and a depth of 0.1 microns. After removing, clean the substrate with ethanol and conductive water, remove the moisture in the cleaned substrate in a muffle furnace at 200°C, dry the substrate, and fix the substrate on the stainless steel seed rod.

[0019] Melt high-grade pure polypropylene powder in a quartz crucible at 180°C for half an hour. After constant temperature, the melt surface temperature is kept at 180°C. The substrate with grooves is driven by the seed rod to contact the surface of the melt for 10 seconds and then breaks away from the melt. The adsorbed melt on the lower surface of the s...

Embodiment 2

[0020] Preparation of Example 2 propylene nanofibers by "small boat method" liquid phase epitaxy

[0021] Attached with plasma or laser beam figure 2 The lower surface shown was precision polished to optical grade 1 ABS. The lower surface of the rectangular substrate was etched into grooves 0.13 microns wide and 0.1 microns deep.

[0022] The molten polypropylene melt was placed in the attached image 3 The shown constant temperature pool is full, and the temperature of the upper part of the melt in the constant temperature pool is 170°C, which is the melting point of polypropylene. On the right side of the constant temperature pool, there is an elastic scraper fixed on the edge of the constant temperature pool, and the neatly opened scraper opens upward. Move the grooved ABS substrate from left to right against the upper part of the constant temperature pool slowly and at a constant speed from left to right. Part of the melt in the constant temperature bath adheres to the...

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Abstract

The invention provides a preparation method of polypropylene nano fibers with controllable size. The preparation method is characterized in that a polypropylene melt adsorbed in a groove of a substrate is subjected to liquid phase epitaxy to precipitate polypropylene and grow nano fibers. The groove with nanometer-grade width and height is formed in one face of the substrate. The surface temperature of a polypropylene melt is 180 DEG C. The groove is formed through etching of plasmas or laser. The size of the obtained nano fibers is controlled by the width and the depth of the substrate groove and the nano fibers with the needed size can be obtained through adjusting the width and depth of the groove. In the preparation process, an external electromagnetic field can be used for inducing ions or organic monomers in the melt so that the conveying effect of materials in the melt is improved, and furthermore, the crystallinity degree of the epitaxy nano fibers is improved. The crystallinity degree of the epitaxy nano fibers is controlled through adjusting the materials of the groove substrate and a groove wall.

Description

technical field [0001] The invention relates to a method for preparing organic nanofibers, in particular to a method for preparing polypropylene nanofibers. Background technique [0002] With its unique characteristics, nanofibers have a good effect on the upgrading and transformation of traditional industries and technologies, and have potential development prospects, and their preparation methods have also been vigorously developed. At present, the main preparation methods of nanofibers are chemical synthesis method, biosynthesis method, electrospinning method and melt blown method, as well as arc method, catalytic method, microporous template method, plasma method and laser method used in the preparation of carbon nanotubes. . The invention patent "Taylor cone multi-nozzle electrospinning machine" (application number 200710172744) and the patent "upward spraying multi-nozzle electrospinning machine" (application number 200720076954) disclose a method of using nozzles to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/06D01D5/08
Inventor 万尤宝吴宇容
Owner JIAXING UNIV
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