阅读说明：本技术 一种高强度空气过滤纸及其制备方法 (High-strength air filter paper and preparation method thereof ) 是由 陶卫荣 瞿薇 于 2019-08-26 设计创作，主要内容包括：一种高强度空气过滤纸的制备方法,包括以下步骤：将纤维材料与水混合后在疏解器中充分疏解稀释得基层纤维悬浮液,再将悬浮液成型抽吸后得基层成型湿纸；将碳纳米材料加入表面活性剂溶液,超声分散,得碳纳米材料分散液；将所述碳纳米材料分散液和粘合剂混合后,加入水配置混合稀释液；将成型湿纸浸泡在混合稀释液中,保持30～40min后,取出抽吸,干燥,然后施胶烘干即得空气过滤纸。本发明克服了现有技术的不足,通过含碳纳米材料的空气过滤纸过滤效率高、过滤阻力低、不仅能过滤颗粒污染物,还能去除空气中的化学污染物、病毒；并通过在电流及高压的作用下,使原纸表面形成多孔膜,从而能够增加空气过滤纸的阻燃效果。(A preparation method of high-strength air filter paper comprises the following steps: mixing fiber materials with water, fully defibering and diluting in a defibering device to obtain base layer fiber suspension, and then forming and pumping the suspension to obtain base layer formed wet paper; adding the carbon nano material into a surfactant solution, and performing ultrasonic dispersion to obtain a carbon nano material dispersion solution; mixing the carbon nano-material dispersion liquid with an adhesive, and adding water to prepare a mixed diluent; and soaking the formed wet paper in the mixed diluent, keeping for 30-40 min, taking out, sucking, drying, gluing and drying to obtain the air filter paper. The invention overcomes the defects of the prior art, and the air filter paper containing the carbon nano material has high filtering efficiency and low filtering resistance, can filter particle pollutants and can also remove chemical pollutants and viruses in the air; and under the action of current and high voltage, the surface of the base paper forms a porous membrane, so that the flame retardant effect of the air filter paper can be improved.)

1. A preparation method of high-strength air filter paper is characterized by comprising the following steps: the method comprises the following steps:

preparing base paper, mixing fiber materials with water, fully defibering in a defibering device, diluting with water until the mass concentration is 0.01-2% to obtain base fiber suspension, then sending the suspension to a forming device for forming, and sucking to obtain base forming wet paper;

(2) preparing a carbon nano material dispersion liquid, adding the carbon nano material into a surfactant solution with the mass concentration of 0.05-5 wt%, and performing ultrasonic dispersion to obtain the carbon nano material dispersion liquid;

(3) preparing a mixed diluent, mixing the carbon nano-material dispersion liquid and the adhesive, and adding water to prepare the mixed diluent containing the carbon nano-material dispersion liquid and the adhesive with the mass percentage total amount of 0.5-5%;

(4) and (3) obtaining air filter paper, soaking the formed wet paper obtained in the step (1) in the mixed diluent obtained in the step (3) at the soaking temperature of 70-75 ℃ for 40-50 min, taking out, electrifying and pressurizing at the voltage of 60-70V and the pressure of 1.6-2.0 MPa, keeping for 30-40 min, taking out, sucking, drying, gluing and drying to obtain the air filter paper.

2. The method of making air-filter paper according to claim 1, wherein: the fiber material in the step (1) is a mixed material of carbon fiber, glass fiber and polyester fiber.

3. The method of making air-filter paper according to claim 1, wherein: the carbon nano material in the step (2) is a carbon nano tube and/or a carbon nano fiber; the carbon nano material has the size of 1-300nm in diameter and 0.5-100 μm in length.

4. The method of making air-filter paper according to claim 1, wherein: the surfactant in the step (2) is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.

5. The method of making air-filter paper according to claim 1, wherein: the adhesive in the step (3) is one or more of polyurethane adhesive, acrylic resin adhesive and phenolic resin adhesive.

6. Air filter paper obtained by the production method according to any one of claims 1 to 5.

7. An air filter paper according to claim 6, wherein: the filter comprises a main filter layer (1) and an enhancement layer (2), wherein the enhancement layer (2) is compounded on the upper surface and the lower surface of the main filter layer (1).

8. An air filter paper according to claim 7, wherein: the main filter layer (1) and the enhancement layer (2) are both S-shaped.

Technical Field

The invention relates to the technical field of preparation of air filter paper, in particular to high-strength air filter paper and a preparation method thereof.

Background

The air contains oxygen and hydrogen, and also contains other harmful substances such as dust, sandy soil, bacteria and the like, and the air needs to be filtered under certain special environmental requirements so as to achieve the aim of filtering the air. Air filter paper is a commonly used air filter material.

The air filter paper used at present is formed by a traditional plant fiber filter paper layer, and the following defects exist in the air filtering process due to structural defects: due to the thickness limitation of the paper medium, the filtered particle suspended matters are easy to be filled in the medium, so that the effective filtering time is short; and the air filter paper used in the current market is easy to breed fungi in a damp environment, so that the protected environment can penetrate through the protective layer under high-pressure air quantity for a long time, and then enters the protected environment, thereby causing environmental pollution. In addition, the filter material is easy to be affected with damp in a damp environment, so that the strength is reduced, and the service life of the air filter paper is greatly reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the high-strength air filter paper and the preparation method thereof, which overcome the defects of the prior art, and the air filter paper made of the carbon-containing nano material has high filtering efficiency and low filtering resistance, can filter particle pollutants and can also remove chemical pollutants and viruses in the air; and under the action of current and high voltage, the surface of the base paper forms a porous membrane, so that the flame retardant effect of the air filter paper can be improved.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a preparation method of high-strength air filter paper comprises the following steps:

(1) preparing base paper, mixing fiber materials with water, fully defibering in a defibering device, diluting with water until the mass concentration is 0.01-2% to obtain base fiber suspension, then sending the suspension to a forming device for forming, and sucking to obtain base forming wet paper;

(2) preparing a carbon nano material dispersion liquid, adding the carbon nano material into a surfactant solution with the mass concentration of 0.05-5 wt%, and performing ultrasonic dispersion to obtain the carbon nano material dispersion liquid;

(3) preparing a mixed diluent, mixing the carbon nano-material dispersion liquid and the adhesive, and adding water to prepare the mixed diluent containing the carbon nano-material dispersion liquid and the adhesive with the mass percentage total amount of 0.5-5%;

(4) and (3) obtaining air filter paper, soaking the formed wet paper obtained in the step (1) in the mixed diluent obtained in the step (3) at the soaking temperature of 70-75 ℃ for 40-50 min, taking out, electrifying and pressurizing at the voltage of 60-70V and the pressure of 1.6-2.0 MPa, keeping for 30-40 min, taking out, sucking, drying, gluing and drying to obtain the air filter paper.

Preferably, the fiber material in the step (1) is a mixed material of carbon fiber, glass fiber and polyester fiber;

preferably, the carbon nano material in the step (2) is carbon nano tube and/or carbon nano fiber; the carbon nano material has the size of 1-300nm in diameter and 0.5-100 mu m in length;

preferably, the surfactant in the step (2) is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.

Preferably, the adhesive in step (3) is one or more of a polyurethane adhesive, an acrylic resin adhesive and a phenolic resin adhesive.

It is another object of the present invention to provide an air filter paper.

Preferably, the filter comprises a main filter layer and a reinforcing layer, wherein the reinforcing layer is compounded on the upper surface and the lower surface of the main filter layer.

Preferably, the main filtration layer and the reinforcement layer are both S-shaped.

The invention provides high-strength air filter paper and a preparation method thereof. The method has the following beneficial effects: the air filter paper made of the carbon-containing nano material has high filtering efficiency and low filtering resistance, and can not only filter particle pollutants, but also remove chemical pollutants and viruses in the air; under the action of current and high voltage, a porous membrane is formed on the surface of the base paper, so that the flame retardant effect of the air filter paper can be improved; the obtained product can meet different functional requirements, is applied to the field of air filter paper, and has the advantages of small air resistance, high filtering efficiency and excellent antibacterial performance.

Drawings

In order to more clearly illustrate the present invention or the prior art solutions, the drawings that are needed in the description of the prior art will be briefly described below.

FIG. 1 is a functional block diagram of the present invention;

FIG. 2 is a schematic structural view of the air filter paper of the present invention;

in the figure: 1. a main filtration layer; 2. an enhancement layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings.