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Polyimide fiber fibrillation method

A polyimide fiber and processing method technology, applied in the field of papermaking, can solve problems such as low efficiency, increased production cost, and complicated operation, and achieve the effects of reduced contact area, shortened time, and small volume

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

AI Technical Summary

Problems solved by technology

Its disadvantage is that in this process, polyimide fibers need to undergo eight-step physical and chemical treatment to form polyimide ultra-short fibers, which is complex in operation, low in efficiency, and increases in production costs.

Method used

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  • Polyimide fiber fibrillation method
  • Polyimide fiber fibrillation method
  • Polyimide fiber fibrillation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add the chopped polyimide fiber with a diameter of 40 μm and a length of 6000 μm, calcium carbonate powder with a particle size of 5 μm and wool powder with a particle size of 0.1 μm to a grinding machine for 90 minutes of grinding treatment. Polyimide fiber: wool powder body: calcium carbonate powder mass ratio is 5%: 50%: 45%, and then adding NaOH solution with a concentration of 0.01% to the polyimide fiber, calcium carbonate powder and wool powder after grinding to treat the wool powder Dissolve, and separate and dry in filter device and obtain polyimide fiber and calcium carbonate powder, add the HCl that concentration is 0.03% to calcium carbonate powder in the mixture of polyimide fiber and calcium carbonate powder obtained Dissolved, separated polyimide fibers in a funnel and dried to obtain fibrillated polyimide fibers; observed and tested the length of the obtained polyimide fibers in an optical microscope, and the length results are shown in Table 1. What the...

Embodiment 2

[0029]Add the chopped polyimide fiber with a diameter of 40 μm and a length of 6000 μm, calcium carbonate powder with a particle size of 10 μm and wool powder with a particle size of 0.1 μm to a grinding machine for 90 minutes of grinding treatment. Polyimide fiber: wool powder body: calcium carbonate powder mass ratio is 5%: 50%: 45%, and then adding NaOH solution with a concentration of 0.01% to the polyimide fiber, calcium carbonate powder and wool powder after grinding to treat the wool powder Dissolve, and separate and dry in filter device and obtain polyimide fiber and calcium carbonate powder, add the HCl that concentration is 0.03% to calcium carbonate powder in the mixture of polyimide fiber and calcium carbonate powder obtained Dissolved, separated polyimide fibers in a funnel and dried to obtain fibrillated polyimide fibers; observed and tested the length of the obtained polyimide fibers in an optical microscope, and the length results are shown in Table 1. The disc...

Embodiment 3

[0031] Add the chopped polyimide fiber with a diameter of 40 μm and a length of 6000 μm, calcium carbonate powder with a particle size of 20 μm and wool powder with a particle size of 0.1 μm to a grinding machine for 90 minutes of grinding treatment. Polyimide fiber: wool powder body: calcium carbonate powder mass ratio is 5%: 50%: 45%, and then adding NaOH solution with a concentration of 0.01% to the polyimide fiber, calcium carbonate powder and wool powder after grinding to treat the wool powder Dissolve, and separate and dry in filter device and obtain polyimide fiber and calcium carbonate powder, add the HCl that concentration is 0.03% to calcium carbonate powder in the mixture of polyimide fiber and calcium carbonate powder obtained Dissolved, separated polyimide fibers in a funnel and dried to obtain fibrillated polyimide fibers; observed and tested the length of the obtained polyimide fibers in an optical microscope, and the length results are shown in Table 1. The dis...

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Abstract

The invention relates to a polyimide fiber fibrillation method, and belongs to the technical field of papermaking. The method includes the steps of mixing chopped polyimide fiber, protein micro-nano powder and calcium carbonate powder to form a mixture, putting the mixed mixture into a grinding device to be ground, adding a NaOH solution to the ground mixture to separate out the protein micro-nanopowder, and adding an HCl solution to separate out the calcium carbonate powder to obtain the fibrillated polyimide fiber. In the grinding process, the polyimide fiber, protein micro-nano powder andcalcium carbonate powder generate static electricity through friction so that the protein micro-nano powder and calcium carbonate powder can be adsorbed to the polyimide fiber, and therefore the polyimide fiber is separated out, the agglomeration probability of the polyimide fiber in the grinding device is reduced, the polyimide fiber fragmentation efficiency is improved, production time is shortened, and great production cost is saved.

Description

technical field [0001] The invention relates to a polyimide fiber fibrillation treatment method, which belongs to the technical field of papermaking. Background technique [0002] Polyimide fiber has excellent heat resistance, low temperature resistance, insulation, oxidation resistance, UV resistance, radiation resistance, stable chemical properties, high strength, high toughness, high modulus, strong creep resistance, excellent friction performance, no Toxicity, good water absorption, corrosion resistance and other excellent properties, so polyimide fibers are widely used in many fields such as environmental protection, aerospace, special and high temperature insulation, machinery, electrical appliances, chemicals, microelectronics, etc. In recent years, it has also been widely used as a material for special paper. In the process of applying polyimide fibers to papermaking, polyimide fibers need to be processed into ultra-short polyimide fibers with a length of 1-2mm, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/76D06M15/15D06M15/70D06M101/30
CPCD06M11/76D06M15/15D06M15/70D06M2101/30
Inventor 徐卫林潘恒干林丽王阿明曹根阳
Owner WUHAN TEXTILE UNIV
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