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Bark-like polypropylene/polycarbonate nanofiber meltblown air filter material and preparation method thereof

A technology of polycarbonate and nanofiber, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve problems such as high cost and complicated process, and achieve the effect of improving the ability to intercept atmospheric particles

Active Publication Date: 2019-12-03
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods of melt blowing to refine the fiber diameter mainly include die head modification, electrostatic, post-treatment, etc., but these preparation methods are not only complicated in process but also relatively high in cost.

Method used

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  • Bark-like polypropylene/polycarbonate nanofiber meltblown air filter material and preparation method thereof
  • Bark-like polypropylene/polycarbonate nanofiber meltblown air filter material and preparation method thereof
  • Bark-like polypropylene/polycarbonate nanofiber meltblown air filter material and preparation method thereof

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specific Embodiment

[0023] The technical problem to be solved by the present invention is to invent a method for preparing bark-like polypropylene / polycarbonate nanofiber melt blown air filter material.

[0024] Step 1. Dry the polypropylene and polycarbonate polymer with a mass ratio of 95:5 in a blast drying oven at 80°C and 120°C for 2h and 4h, respectively. The melt index and melting point of polypropylene are 35g / 10min and 169℃, the melt index and melting point of polycarbonate are 14.4g / 10min and 250℃ respectively; after drying, the polycarbonate and polypropylene are uniformly mixed and pelletized by a single screw pelletizer; pelletizing cycle 2 Two-component polypropylene / polycarbonate masterbatch was prepared after the second time; the temperature of screw 1, screw 2, screw 3, and die head of the single-screw granulator were 240, 260, 275, and 200 ℃ respectively, and single-screw granulation The screw speed and cutting speed of the machine are 21r·min respectively -1 And 32r·min -1 ;

[00...

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Abstract

The invention discloses a bark-like polypropylene / polycarbonate nanofiber meltblown air filter material and a preparation method thereof. The method comprises the following steps: step 1, polypropylene and polycarbonate are dried and mixed, and then a two-component polypropylene / polycarbonate mixed masterbatch is prepared through a granulator; and step 2, the polypropylene / polycarbonate masterbatch obtained in the step 1 is poured into a feeding barrel of meltblown equipment, then passes through a pipeline, a metering pump and a die head in order, and finally is blown to the meltblown filter material. Under action of meltblown hot air, polycarbonate with a low content and a high viscosity plays a role in drawing and thinning polypropylene fiber, and an average fiber diameter can reach nano-scale. At the same time, bark-like grooves can be produced on the surface of the polypropylene fiber under action of drawing and thinning, a specific surface area of the filter material is improved,and the grooves are more conducive to interception of atmospheric particles, so that a new design idea for an application of meltblown materials on air filtration fields is provided.

Description

Technical field: [0001] The invention relates to the field of functional materials, in particular to a bark-like polypropylene / polycarbonate nanofiber melt blown air filter material and a preparation method thereof. Background technique: [0002] Melt blown air filter material has been widely used in the field of air filtration because of its simple process, high output, one-step molding, and high strength. The minimum average fiber diameter of a typical meltblown filter material is 1-2μm, which has a certain gap compared with the electrospun filter material with a fiber diameter in the range of 100-500nm. In order to obtain a meltblown filter material with higher filtration performance, the fine fiber diameter becomes The problem that needs to be solved urgently today. The current methods of meltblown fiber diameter thinning mainly include die modification, static electricity, post-treatment, etc., but these preparation methods are not only complicated in process but also relat...

Claims

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Application Information

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IPC IPC(8): B01D39/16B01D46/00
CPCB01D46/0032B01D46/0001B01D39/1623
Inventor 李婷婷岑喜喜林佳弘楼静文
Owner TIANJIN POLYTECHNIC UNIV
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