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Nano SiO2 modified PTFE needle blend filter material and preparation thereof and application thereof

A nano-modified technology, which is applied in the field of nano-SiO2 modified PTFE needle-punched blended filter material and its preparation, can solve the problems of poor filtering effect and achieve the effect of simple process, small size and high specific resistance

Inactive Publication Date: 2019-01-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of nano SiO 2 Modified PTFE needle-punched blended filter material and its preparation method and application, to overcome the defect that air filter materials in the prior art have poor filtering effect on particles with smaller particle sizes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Hydrophobic nano-SiO 2 Particles and PTFE resin are mixed according to the mass ratio of 2:100, wherein, nano-SiO 2 The particle size is 20nm, put the prepared mixture into the mixer and stir at a constant speed for 3 hours to obtain the mixture 1; mix the mixture 1 and aviation kerosene according to the mass ratio of 100:20, and stir evenly in the mixer for 3 hours Hours, the mixture 2 was obtained, and then the uniform mixture 2 was left to stand at 50°C for 72 hours;

[0045] (2) Carry out pre-compression forming with the compacting machine of the mixture 2 that has been left still, the pressure is 4Mpa, and the pressing temperature is 25°C to make a columnar pre-compression molding body; then the pre-compression molding body is further pushed with a pusher Pressing, the pushing pressure is 4Mpa, and the pushing temperature is 160°C to make a rod-shaped extruded body; then the rod-shaped extruded body is pressed into a base belt with a calender, the calendering ...

Embodiment 2

[0052] According to step in embodiment 1, in step (1), hydrophobic nano-SiO 2 Particles and PTFE resin are mixed according to the mass ratio of 3:100, and the standing time is 96 hours. In step (2), the pre-compression molding pressure is 5Mpa, the pushing pressure is 6Mpa, the pushing temperature is 180 ° C, and the calendering temperature is 42°C, and the rest are the same as in Example 1 to obtain a single-layer nano-SiO 2 Modified PTFE needle-punched blend filter material, followed by monolayer nano-SiO 2 Three-layer lamination of modified PTFE needle-punched blended filter material to produce multi-layer composite nano-SiO 2 Modified PTFE needle-punched blend filter material.

[0053] Tested by optical contact angle measuring instrument, the nano-SiO 2 The contact angle of the modified PTFE needle-punched blended filter material is 146.8°, tested by the TSI 8130 filter tester, under the condition of a flow rate of 5.33cm / s, the multilayer composite nano-SiO 2 The filt...

Embodiment 3

[0055] According to step in embodiment 1, in step (1), hydrophobic nano-SiO 2 Granules and PTFE resin are mixed according to the mass ratio of 1:100, nano-SiO 2 The particle size is 50nm, the pre-compression molding pressure is 5Mpa in step (2), the pushing pressure is 6Mpa, the pushing temperature is 170°C, the calendering temperature is 45°C, the calendering line speed is 12m / min, and drying in step (3) The temperature is 310°C, the sintering temperature is 420°C, the drawing temperature is 380°C, the heat setting temperature in step (4) is 230°C, and the rest are the same as in Example 1 to obtain nano-SiO 2 Modified PTFE needle-punched blend filter material.

[0056] Tested by optical contact angle measuring instrument, the nano-SiO 2 The contact angle of the modified PTFE needle-punched blended filter material is 129.4°, tested by the TSI 8130 filtration tester, and the nano-SiO 2 The filtration efficiency of the modified PTFE needle-punched blended filter material for...

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Abstract

The invention relates to a nano SiO2 modified PTFE needle blend filter material and a preparation thereof and application thereof. The nano SiO2 modified PTFE needle blend filter material is obtainedby opening, mixing, combing, lapping, pre-needling and main-needling nano SiO2 modified PTFE short fibers and fibers A. The preparation method comprises the steps of preparing the nano SiO2 modified PTFE short fibers and preparing the nano SiO2 modified PTFE needle blend filter material. The nano SiO2 modified PTFE needle blend filter material possesses excellent friction electrification auxiliaryperformance so that fine particulate matters can be effectively captured; and the nano SiO2 modified PTFE needle blend filter material has the advantages of high efficiency, low resistance, stable physical and chemical property, long service life and the like.

Description

technical field [0001] The invention belongs to the field of air filter materials and their preparation and application, in particular to a nano-SiO 2 Modified PTFE needle-punched blended filter material and its preparation method and application. Background technique [0002] With the rapid development of the economy, my country's industrialization and urbanization process is accelerating, energy consumption is increasing rapidly, and the problem of air pollution represented by smog is becoming more and more serious, and it shows the characteristics of regionalization. Some areas such as industrial areas and urban centers have smog The frequency and intensity of occurrence are gradually increasing. Smog can lead to diseases such as respiratory infection, bronchitis, occupational asthma, and even loss of lung function, and can increase the incidence of dementia and various cancers, causing serious harm to human health in the working environment. The fundamental measure to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08B01D46/00D04H1/4382D04H1/46D04H1/498D04H1/559D04H1/593
CPCB01D39/08B01D46/0001B01D2239/0216B01D2239/0428B01D2239/0457B01D2239/10D04H1/4382D04H1/46D04H1/498D04H1/559D04H1/593
Inventor 靳向煜王玉晓刘金鑫张星吴海波
Owner DONGHUA UNIV
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