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A kind of nano-montmorillonite/polylactic acid melt-blown filter material

A technology of nano-montmorillonite and filter materials, which is applied in the field of non-woven material manufacturing technology to achieve high-efficiency filter materials, green filter materials, and good filter effects

Active Publication Date: 2017-01-25
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using nano-montmorillonite to modify the polylactic acid melt-blown composite non-woven filter material can make the material obtain a relatively stable electret effect, but there is no durable electret nano-montmorillonite / polylactic acid melt-blown composite at home and abroad. Related reports on nonwoven filter material and its preparation method

Method used

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  • A kind of nano-montmorillonite/polylactic acid melt-blown filter material
  • A kind of nano-montmorillonite/polylactic acid melt-blown filter material
  • A kind of nano-montmorillonite/polylactic acid melt-blown filter material

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preparation example Construction

[0018] see figure 1 , the present invention provides a technical solution: a nano-montmorillonite / polylactic acid melt-blown filter material, the mass percentage of the product is polylactic acid 97-99%, and the average particle size is no more than 25nm montmorillonite particles 1 ~3%; Its preparation method comprises the following steps, step 1, nano-montmorillonite modified polylactic acid chip preparation; Built-in corona discharge electret treatment;

[0019] In step 1, the polylactic acid slices for melt-blowing are dried at 100°C for 12 hours, and the nano-montmorillonite particles with an average particle size of no more than 25nm are uniformly dispersed with the polylactic acid slices for melt-blowing at a mass percentage of 20% Mix, add to a screw extruder, melt and extrude at a temperature of 160-180°C, cool and granulate, and obtain nano-montmorillonite modified polylactic acid slices;

[0020] In step 2, the obtained nano-montmorillonite-modified polylactic acid...

Embodiment

[0023] Example: Dry the special polylactic acid slices for melt-blowing at 100°C for 12 hours, disperse and mix nano-montmorillonite particles with an average particle size of no more than 25nm with the special polylactic acid slices for melt-blowing at a mass percentage of 5%, and add The screw extruder is melted and extruded at a temperature of 190° C., cooled and granulated to obtain nano-montmorillonite-modified polylactic acid chips. Then, 5% mass percentage of the obtained nano-montmorillonite modified polylactic acid slices is evenly mixed with melt-blown special polylactic acid slices, and fed into the screw extruder for melt-blown spinning. The spinning temperature is 190 ° C, and the melt passes through the screw to The spinning component is ejected from the spinneret and drawn by high-speed hot air to make melt-blown ultra-fine fibers, and form melt-blown non-woven materials on the receiving device. The spinning speed is 900m / min to obtain nano-montmorillonite modifi...

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Abstract

The invention relates to a nanometer montmorillonite / polylactic acid melt-blown filter material. The mass percent component of the product is 97-99% of polylactic acid, and 1-3% of montmorillonite with an average particle diameter not exceeding 25nm. The preparation steps include: Step 1: Firstly, the nano-montmorillonite particles with an average particle size of no more than 25nm are uniformly dispersed, mixed and melted with polylactic acid chips specially used for melt-blowing at a mass percentage of 20%, and then cooled and granulated to obtain nano-montmorillonite-modified polylactic acid particles. Lactic acid slices; step 2, the obtained nano-montmorillonite modified polylactic acid slices are evenly mixed with 5-15% by mass percentage of polylactic acid slices specially used for melt-blowing, and fed into a screw extruder for melt-blown spinning to obtain nano-montmorillonite Soil-removing modified polylactic acid melt-blown composite non-woven filter material; step 3, external corona discharge electret treatment. This product has a high-efficiency and low-resistance filtering effect, and can play a very good filtering effect on PM2.5, and its filtering effect can reach 100%.

Description

technical field [0001] The invention relates to the technical field of non-woven material production technology application, in particular to a nano-montmorillonite / polylactic acid melt-blown filter material. Background technique [0002] In today's society with increasingly rapid economic development, the improvement of living standards is accompanied by serious air pollution. Automobile exhaust, industrial smoke, and waste incineration dust have adverse effects on human health. Fiber filter material has the advantages of high filtration efficiency and small pressure drop, and has become the most important method of air purification. However, for ordinary filter materials, the electrostatic adsorption between the filter material and the particles is very weak, and the mechanical barrier plays a major role. Get a good filtering effect. Moreover, the surface of the filter material is prone to harmful microorganisms, which may cause re-pollution to the filtered air, far fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14D06M10/02D04H1/435
Inventor 任煜张伟臧传锋尤祥银张银王晓娜
Owner NANTONG UNIVERSITY
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