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A kind of reusable nano cobweb air filter membrane and preparation method thereof

An air filtration and arachnoid technology, which is applied in the field of air filter material preparation, can solve the problems of high resistance pressure drop and non-recyclability, and achieve low resistance pressure drop, which is conducive to the passage of airflow and promotes good forming effects

Active Publication Date: 2019-09-03
XINJI HUARUI FILTER PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a reusable nano-spider web air filter membrane and its preparation method in view of the existing air filter material, which has high resistance pressure drop and cannot be reused.

Method used

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  • A kind of reusable nano cobweb air filter membrane and preparation method thereof
  • A kind of reusable nano cobweb air filter membrane and preparation method thereof
  • A kind of reusable nano cobweb air filter membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method for reusable nano-spider web air filter membrane, the specific preparation process is as follows:

[0036] (1) Add 0.3g of polyamide 6 to a mixed solvent composed of 1.176g of formic acid and 0.504g of acetic acid, then add 0.02g of barium chloride, stir continuously with a magnetic stirrer for 12h until fully dissolved, and obtain a mass fraction of 15%, A homogeneous and stable polyamide 6 spinning solution with a conductivity of 6.8 mS / cm and a surface tension of 30.3 mN / m.

[0037] (2) During the electrostatic spraying process, control the spinning voltage to 25kV, the receiving distance to 18cm, the spinning speed to 0.1mL / h, the drum speed to 50r / min, and the ambient temperature to 22°C. The speed is 45m / s, and the relative humidity within the range of 0~6cm of the jet flight is 40% to promote the stretching and refinement of the jet, and the relative humidity within the range of 6~18cm of the jet flight is 25% to realize the rapid volatilizatio...

Embodiment 2

[0044] A preparation method for reusable nano-spider web air filter membrane, the specific preparation process is as follows:

[0045] (1) Add 0.4g of polyamide 66 to a mixed solvent composed of 1.264g of formic acid and 0.316g of acetic acid, then add 0.02g of calcium chloride, stir continuously with a magnetic stirrer for 16h until fully dissolved, and obtain a mass fraction of 20%, A homogeneous and stable polyamide 66 spinning solution with a conductivity of 5.3mS / cm and a surface tension of 24.1mN / m.

[0046] (2) During the process of electrostatic spraying, control the spinning voltage to 28kV, the receiving distance to 15cm, the spinning speed to 0.5mL / h, the drum speed to 60r / min, and the ambient temperature to 25°C. The speed is 36m / s, and the relative humidity within the range of 0~6cm of the jet flight is 50% to promote the stretching and refinement of the jet, and the relative humidity within the range of 6~15cm of the jet flight is 28% to realize the rapid volatil...

Embodiment 3

[0053] A preparation method for reusable nano-spider web air filter membrane, the specific preparation process is as follows:

[0054] (1) Add 0.36g of bio-based polyamide 56 to a mixed solvent composed of 1.467g of formic acid and 0.163g of acetic acid, then add 0.01g of magnesium chloride, and stir continuously with a magnetic stirrer for 20h until it is fully dissolved, and the mass fraction is 18%. A homogeneous and stable bio-based polyamide 56 spinning solution with a conductivity of 3.6 mS / cm and a surface tension of 27.2 mN / m.

[0055] (2) During the electrostatic spraying process, control the spinning voltage to 30kV, the receiving distance to 20cm, the spinning speed to 0.3mL / h, the drum speed to 45r / min, and the ambient temperature to 25°C. The speed is 50m / s, and the relative humidity within the range of 0~6cm of the jet flight is 55% to promote the stretching and refinement of the jet, and the relative humidity within the range of 6~20cm of the jet flight is 32% t...

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Abstract

The invention relates to a reusable nano cobweb air filter film and a preparation method thereof. The reusable nano cobweb air filter film is a multi-stage structured nano cobweb film material formed by mutually compounding a two-dimensional superfine cobweb film and one-dimensional nano fiber. The preparation method comprises the following steps: dissolving a polymer into a mixed solvent, adding bivalent inorganic salt, and performing stirring to obtain a homogenized spinning solution; performing electrostatic web spraying through the obtained spinning liquid: blowing polymer jet with lateral flow in an electrostatic jetting process, and forming a relative humidity gradient field in a spinning region to promote formation of charged small droplets, stretching and slenderizing of jet flow, quick volatilization of a solvent and phase separation; after a product is fully dried, obtaining the reusable nano cobweb air filter film. The preparation process is simple, and the filter film is high in structural adjustability and controllability; the cobweb coverage rate is 100 percent; the filter film has the filter efficiency of 99 percent or above for particulate matters with the particle size of 2.5 [mu]m; the resistance pressure drop is less than or equal to 120 Pa; the clogging capacity is more than or equal to 40 g / m<2>; after ash is cleaned, the residual clogging capacity is less than or equal to 5 g / m<2>; therefore, the reusable nano cobweb air filter film has high reusability.

Description

technical field [0001] The invention belongs to the technical field of air filter material preparation, and relates to a reusable nano-spider web air filter membrane and a preparation method thereof, in particular to a reusable nano-spider web air filter film obtained by electrostatic spraying technology using different polymers as raw materials. Filtration membrane and its preparation method. Background technique [0002] With the rapid development of industrialization and urbanization in our country, the problem of air pollution is becoming more and more serious, especially in recent years, frequent smog pollution in most parts of our country has caused serious harm to people's health and living environment. Fiber filter materials are used to strengthen Filtration of fine particles in the air is an effective way to solve the above problems. However, the existing filter materials such as glass fiber, carbon fiber felt, and non-woven fabrics generally have problems such as l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56B01D69/02B01D69/12B01D67/00B01D53/22
Inventor 刘兆麟王欣张威
Owner XINJI HUARUI FILTER PAPER CO LTD