Preparation method of nano fiber-needling PTFE base cloth filter material

A technology of nanofiber and PTFE, which is applied in the field of preparation of nanofiber-needle-punched PTFE base cloth filter material, can solve the problems that the filtering effect needs to be improved, the wear resistance of PTFE fiber filter material is general, etc., and achieve good charge storage stability, Excellent filtration performance and broad market prospects

Inactive Publication Date: 2016-11-23
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear resistance of PTFE fiber filter material is average, and the filtering effect still needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The invention provides a kind of preparation method of nanofiber-acupunctured PTFE base cloth filter material, comprises the following steps, step 1, PTFE base cloth pretreatment:

[0029] (1) adding titanium dioxide nanofibers or nano activated carbon fibers into ethanol and ultrasonically dispersing to obtain a uniform dispersion A, the mass fraction of titanium dioxide nanofibers or nano activated carbon fibers in the dispersion A is 0.2% to 4%. Titanium dioxide nanofibers or nano activated carbon fibers have a diameter of 30nm to 80nm and a length of 300nm to 600nm;

[0030] (2) Soak the PTFE base cloth in the dispersion liquid A, take it out and dry it, and obtain the PTFE base cloth base material A on which titanium dioxide nanofibers or nano activated carbon fibers are deposited on the surface;

[0031] Step 2, electrospinning:

[0032] (1) Ultrasonic dispersion of inorganic nanoparticles into the solvent to obtain a uniform dispersion B, wherein the inorganic n...

Embodiment 1

[0040] Carry out the preparation of nanofiber-needle-punched PTFE base cloth filter material according to the following methods:

[0041] Step 1, pre-treatment of PTFE base cloth:

[0042] (1) First add 2.6g of titanium dioxide nanofibers into 130ml of ethanol for ultrasonic dispersion to obtain a uniform dispersion A;

[0043] (2) Mix PTFE fiber and PPS fiber according to the mass ratio of 5:8, go through the process of opening, carding, laying and needle punching, and then soak in dispersion A for 6 minutes, then take it out and dry it at 72°C to obtain the surface Deposit the PTFE base material A of titanium dioxide nanofiber;

[0044] Step 2, electrospinning:

[0045] (1) Add inorganic nanoparticles to the solvent for ultrasonic dispersion, and the ultrasonic dispersion time is 30 minutes to obtain a uniform dispersion B, in which the inorganic nanoparticles are silica, and the solvent is N,N-dimethylformamide;

[0046] (2) Add the polymer to the dispersion B, and perform...

Embodiment 2

[0051] Carry out the preparation of nanofiber-needle-punched PTFE base cloth filter material according to the following methods:

[0052] Step 1, pre-treatment of PTFE base cloth:

[0053] (1) First add 1.1g of nano-activated carbon fiber into 70ml of ethanol for ultrasonic dispersion to obtain a uniform dispersion A;

[0054] (2) Mix PTFE fiber and PPS fiber according to the mass ratio of 5:16, go through the process of opening, carding, laying and needle punching, and then soak in dispersion A for 4min, then take it out and dry it at 80°C to obtain the surface Deposit the PTFE base material A of nano active carbon fiber;

[0055] Step 2, electrospinning:

[0056] (1) Add inorganic nanoparticles to the solvent for ultrasonic dispersion, and the ultrasonic dispersion time is 40 minutes to obtain a uniform dispersion B, in which the inorganic nanoparticles are silica, and the solvent is N,N-dimethylformamide;

[0057] (2) Add the polymer to the dispersion B, and perform magn...

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Abstract

The invention relates to a preparation method of a nano fiber-needling PTFE base cloth filter material, and belongs to the technical field of electrospinning. The preparation method comprises the following steps: step 1, PTFE base cloth pretreatment; step 2, electrospinning; step 3, superfine nano fiber dispersion liquid preparation; and step 4, composite filter material soaking treatment. In the technical scheme provided by the invention, the PTFE base cloth is prepared by mixing PTFE fibers and PPS fibers, so, compared with the traditional glass fiber mat, the flexibility is better, and the spinnability and durability of the fiber material are relatively greatly improved; the service life is prolonged to 1-2 years compared with eight months of the common glass fiber mat base cloth; and the market prospect is wide.

Description

technical field [0001] The invention relates to a preparation method of a nanofiber-acupunctured PTFE base cloth filter material, which belongs to the technical field of electrospinning. Background technique [0002] Polytetrafluoroethylene (PTFE) synthetic fiber filter material is one of the more high-end filter materials. It can withstand the acid and alkali within the entire pH value range under the continuous operating temperature of 240°C and the instantaneous temperature of 260°C. erosion. PTFE synthetic fiber has excellent self-lubricating properties, does not absorb moisture, and can withstand ultraviolet radiation. However, the wear resistance of PTFE fiber filter material is average, and the filtering effect still needs to be improved. [0003] Electrospinning is a nanofiber preparation technology that uses high voltage for spinning. It is also a nanofiber electret technology. During the spinning process, a large amount of space charge can be injected into the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00D01D5/00D06M15/347D06M11/46D06M11/74D01F6/48D01F1/10D06M101/22D06M101/30
CPCD04H13/00D01D5/003D01D5/0084D01F1/10D01F6/48D06M11/46D06M11/74D06M15/347D06M2101/22D06M2101/30
Inventor 刘江峰徐辉周冠辰
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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