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Thermal comfort PM2.5-proof nanofiber mask filter element and preparation method thereof

A technology of nanofibers and thermal comfort, which is applied in the field of nanofiber mask filter element and its preparation, can solve the problems that have not been applied, and the hot feeling of human body face has not been considered, and achieve the effect of simple production method

Active Publication Date: 2021-02-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent satisfies the wearer's facial comfort in terms of physical structure, but the stuffy feeling of the human face is not considered
[0007] In October 2019, the patent CN110660875A disclosed a method for cooling photovoltaic modules using transparent mid-infrared radiation cellulose films. This patent embeds transparent materials with infrared radiation capabilities into photovoltaic modules so that they can pass through the atmosphere under working conditions Thermal radiation in the window band, so as to achieve the purpose of cooling photovoltaic modules, but this zero-energy surface cooling technology has not been applied to human face filters

Method used

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  • Thermal comfort PM2.5-proof nanofiber mask filter element and preparation method thereof
  • Thermal comfort PM2.5-proof nanofiber mask filter element and preparation method thereof
  • Thermal comfort PM2.5-proof nanofiber mask filter element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A thermal comfort anti-PM 2.5 The preparation method of the nanofiber mouth mask filter element, concrete steps are:

[0057] (1) Add 2g of polyamide 66 to 8g of formic acid and mix, stir evenly with a glass rod, pay attention to open the fume hood when taking formic acid; put 0.75g of zinc oxide (purity 99.5%, average particle size 20nm) in the above In the mixed solvent, vibrate with an ultrasonic oscillator for 1.5h, stir evenly to prepare solution A;

[0058] (2) Add spinning solution A to the injection system in the electrospinning device (see figure 1 ), figure 1 Including bolus injection system 1, injection system 2, electrostatic high voltage system 3 and receiving system 4. The receiving system was improved to a red copper mesh receiving plate, and the parameters of the electrospinning process were as follows: the receiving distance was 15cm, the electrostatic high voltage was 20KV, the injection speed was 0.1mm / min, the temperature was 35°C, and the relativ...

Embodiment 2

[0068] A thermal comfort anti-PM 2.5 The preparation method of the nanofiber mouth mask filter element, concrete steps are:

[0069] (1) Mix 1.2g of polyamide 6 and 8.6g of formic acid evenly, pay attention to wear a gas mask and open the fume hood when taking formic acid; put 0.12g of calcium fluoride in the above mixed solvent, and use an ultrasonic oscillator to vibrate for 1.5 h, stir evenly to prepare solution A;

[0070] (2) Add spinning solution A to the injection system in the electrospinning device (see figure 1 ), figure 1 Including bolus injection system 1, injection system 2, electrostatic high voltage system 3 and receiving system 4. The receiving system is improved to a red copper mesh receiving plate. The parameters of the electrospinning process are: the receiving distance is 10cm, the electrostatic high voltage is 25KV, the injection speed is 0.05mm / min, the temperature is 28°C, and the relative humidity is 35%. The time is 30min to obtain the nanofibrous ...

Embodiment 3

[0080] A thermal comfort anti-PM 2.5 The preparation method of the nanofiber mouth mask filter element, concrete steps are:

[0081] (1) Mix 1.87g polyacrylonitrile and 13.68g N,N-dimethylformamide evenly; place 0.15g magnesium fluoride in the above mixed solvent, vibrate with an ultrasonic oscillator for 1.5h, and stir evenly to prepare a solution A;

[0082] (2) Add spinning solution A to the injection system in the electrospinning device (see figure 1 ), figure 1 Including bolus injection system 1, injection system 2, electrostatic high voltage system 3 and receiving system 4. The receiving system is improved to a red copper mesh receiving plate. The parameters of the electrospinning process are as follows: the receiving distance is 20cm, the electrostatic high voltage is 20KV, the injection speed is 0.1mm / min, the temperature is 26°C, and the relative humidity is 50%. The time is 40min to obtain the nanofibrous membrane;

[0083] (3) Dry the membrane in a constant tem...

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Abstract

The invention discloses a thermal comfort PM2.5-proof nanofiber mask filter element and a preparation method thereof. The filter element is composed of an infrared light transmitting layer 5 for enhancing radiation heat dissipation of a human body and a visible light blocking layer 6 for preventing atmospheric environment from radiating heat to the face of the human body. The two layers of functional nano-films are intensively sewed to form the mask filter element, so that PM2.5 is prevented from invading a human body, and meanwhile, the face of the human body is cooled. The average fiber diameter of the prepared thermal comfort nanofiber filter element membrane is 0.2-1 micron, the porosity of the membrane is larger than or equal to 85%, the moisture permeability is 0.01-0.02 g / (cm < 2 >h), the filtering efficiency of particles larger than or equal to 0.3 micron is 90%-99.95%, and the resistance is 3-200 Pa. The infrared transmittance of the prepared thermal comfort mask filter element to a human body is larger than or equal to 85%, and the transmittance of visible light carrying a large amount of radiant heat in the environment is smaller than or equal to 60%.

Description

technical field [0001] The invention belongs to the technical field of air filter materials, in particular to a heat-comfortable anti-PM filter 2.5 Nanofiber mask filter element and preparation method thereof. Background technique [0002] The particulate matter suspended in the air and the germs attached to the particulate matter seriously affect people's daily life and health. Affected by the new crown pneumonia, masks have become an indispensable protective product in people's daily life. While people are pursuing effective filtration of particulate pollutants, new requirements have also been put forward for the comfort of masks. [0003] The stuffy feeling on the face caused by wearing a mask is ubiquitous. At present, ordinary commercial disposable masks are light and thin but cannot effectively protect against PM. 2.5 , Disposable medical masks and N95 masks have good protective performance but do not consider the thermal comfort of the human face. [0004] Electros...

Claims

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Application Information

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IPC IPC(8): B01D39/16D01F6/90D01F1/10D01F6/60D06M11/20D06M11/46D01F6/54D01F6/18D04H1/728D04H3/02A41D13/11A41D31/02A41D31/04A62B7/10A62B23/02D06M101/34D06M101/28
CPCB01D39/1623D01F6/90D01F1/10D01F6/60D06M11/20D06M11/46D01F6/54D01F6/18D04H1/728D04H3/02A41D13/11A41D31/02A41D31/04A62B7/10A62B23/02D06M2101/34D06M2101/28
Inventor 蔡容容雷杨张立志
Owner SOUTH CHINA UNIV OF TECH
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