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Nano-montmorillonite/polylactic acid melt-blown filtering material and preparation method thereof

A technology of nano-montmorillonite and filter material, applied in the field of nano-montmorillonite/polylactic acid melt-blown filter material and its preparation, to achieve the effect of good filtering effect

Active Publication Date: 2015-08-19
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Nano-montmorillonite/polylactic acid melt-blown filtering material and preparation method thereof
  • Nano-montmorillonite/polylactic acid melt-blown filtering material and preparation method thereof
  • Nano-montmorillonite/polylactic acid melt-blown filtering material and preparation method thereof

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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 and a preparation method thereof, the mass percent component of the product is polylactic acid 97% to 99%, and the average particle size is no more than 25nm. 1 to 3% of soil-removing particles; the preparation method includes the following steps, step 1, preparation of nano-montmorillonite modified polylactic acid slices; step 2, preparation of nano-montmorillonite modified melt-blown composite non-woven filter material by melt blowing method; step 3 , external 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 tempe...

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 nano-montmorillonite / polylactic acid melt-blown filtering material and a preparation method of the nano-montmorillonite / polylactic acid melt-blown filtering material. The product consists of the following components by weight percent: 97%-99% of polylactic acid and 1%-3% of montmorillonite with average particle size not more than 25nm. The preparation method comprises the following preparation steps: step 1. firstly dispersing, evenly mixing and melting nano-montmorillonite particles with the average particle size not more than 25 nm at a mass percentage of 20% and special polylactic acid slices for melt-blowing, and cooling for granulation to obtain nano-montmorillonite modified polylactic acid slices; and step 2. then evenly mixing the nano-montmorillonite modified polylactic acid slices with the weight percent of 5%-15% and the special polylactic acid slices for melt-blowing, and feeding into a screw extruder for spinning by melt-blowing to obtain a melt-blown composite non-woven filtering material; and the product has a high-efficiency and low-resistance filtering effect, and has a very good filtering effect for PM2.5, with the filtering effect reaching 100%. Meanwhile, the product has a bacteriostatic effect and biodegradable property, thus being an environment-friendly efficient filtering material.

Description

technical field [0001] The invention relates to the technical field of nonwoven material production technology application, in particular to a nano-montmorillonite / polylactic acid melt-blown filter material and a preparation method thereof. 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-pollut...

Claims

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Application Information

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Patent Type & Authority Applications(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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