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Filter material containing polymer nanofiber, and preparation method thereof

A technology of nanofibers and polymers, applied in the field of filter materials containing polymer nanofibers and its preparation, can solve the problems of unreported, low output of nanofibers, waste of nanofibers, etc., to enhance mechanical properties and reduce entanglement and adhesion phenomenon, the effect of enhancing adhesion

Active Publication Date: 2012-08-15
武汉维晨科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of nanofibers alone as a filter membrane has great limitations. First, due to the poor mechanical properties of nanofiber membranes, it is difficult to control when used alone. Second, because the yield of nanofibers is very low, it is difficult to realize industrial production. If used alone, it will cause waste of nanofibers
However, if the nanofibers are attached to a certain matrix material, it is difficult to ensure the adhesion between the nanofibers and the matrix material, which also leads to difficulties in the application of nanofibers.
[0004] At present, there have been many reports on the use of nanofiber membranes as filter materials, but the method of preparing a mixed fiber filter material containing nanofibers through an air-laid process after mixing nanofibers with conventional fibers has not been reported.

Method used

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preparation example Construction

[0022] A preparation method of a filter material containing polymer nanofibers, the preparation method is carried out in the following steps:

[0023] A In order to reduce the entanglement and adhesion between polymer nanofibers, make them completely loose, and prepare for the next step to better evenly disperse with organic fibers, first use a pulverizer to grind the polymer at room temperature The nanofibers are opened and dispersed to obtain uniformly dispersed and opened polymer nanofibers. The speed of the pulverizer is 10,000 rpm, and the processing time is 1 minute. A larger rotational speed can improve the opening and dispersion of the polymer nanofibers. effect, but the time should not be too long, because it is easy to generate heat during the high-speed operation of the pulverizer, which will lead to the destruction of the polymer nanofiber structure, so the processing time is controlled within 1 minute;

[0024] B will mix the polymer nanofiber obtained through A s...

Embodiment 1

[0029] Use a pulverizer to open and disperse polypropylene nanofibers at room temperature at a speed of 10,000 rpm for 1 minute, and mix the obtained uniformly dispersed and opened polypropylene nanofibers with wool fibers at a mass ratio of 20:80. After the opening machine is opened and dispersed at a speed of 2500 rpm, a mixed fiber layer of polypropylene nanofibers and wool fibers is formed, and then the mixed fiber layer is subjected to a negative wind pressure of 5000Pa by air-laid process. Adsorbed on the rotating mesh of 50 meshes to form a mixed fiber web with a thickness of 2 mm, it was subjected to hot-pressing treatment for 3 minutes at 110 ° C to obtain a wool fiber with a mass fraction of 80% and a wool fiber with a mass fraction of 20%. The filter material containing polypropylene nanofibers composed of polypropylene nanofibers has a molecular weight cut-off of up to 5000.

Embodiment 2

[0031] Adopt pulverizer to carry out opening and dispersing treatment to nylon 6 nanofiber at normal temperature with the rotating speed of 10000 rev / min for 1 minute, after the nylon 6 nanofiber and cotton fiber of uniform dispersion opening are mixed by mass ratio 10:90, Opening and dispersion treatment is carried out by the opening machine at a speed of 2500 rpm to form a mixed fiber layer of nylon 6 nanofibers and cotton fibers, and then the mixed fiber layer is formed under the negative wind pressure of 4000Pa by air-laid process. Adsorbed on the rotating mesh of 50 meshes to form a mixed fiber web with a thickness of 1 mm, it was subjected to hot-pressing treatment for 3 minutes at 100 ° C to obtain a mass fraction of 90% cotton fibers and 10% cotton fibers. The filter material containing nylon 6 nanofibers composed of nylon 6 nanofibers has a molecular weight cut-off of up to 8000.

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Abstract

The invention relates to a filter material containing polymer nanofiber, and a preparation method of the filter material, belonging to the field of textile material. The preparation method comprises the steps of: mixing the polymer nanofiber treated by opening and scutching through a grinder and organic fiber according to the mass ratio of (10-40): (60-90); carrying out mixing and opening treatment on the mixed fiber by an opener to form a mixed fiber layer; and treating the mixed fiber layer by an air lay technology and hot-press technology to prepare the filter material containing the polymer nanofiber. The filter material containing the polymer nanofiber has excellent filtering function; the preparation method of the filter material has the characteristic of being simple in technology; and the industrial production of the filter material containing the nanofiber can be easily realized, so that the filter material has high application potential in the field of cleaning material.

Description

technical field [0001] The invention relates to a filter material containing polymer nanofibers and a preparation method thereof, belonging to the field of textile materials. Background technique [0002] In recent years, with the rapid development of nanomaterial technology, nanofiber technology has become the frontier and research hotspot of fiber science. Due to its large specific surface area, nanofibers are widely used in the purification and filtration of chemical and pharmaceutical products. [0003] In terms of application, due to its ultra-fine fiber diameter, nanofibers are mainly used in various fields in the form of nanofiber membranes, including processing nanofibers into nanofiber membranes as filter materials in water treatment or pharmaceutical purification. However, the use of nanofibers alone as a filter membrane has great limitations. First, due to the poor mechanical properties of nanofiber membranes, it is difficult to control when used alone. Second, be...

Claims

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Application Information

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IPC IPC(8): D04H1/42D04H1/4382D04H1/44D04H1/732B01D39/16
Inventor 王栋王凯薛潇赵青华徐卫林蒋海青
Owner 武汉维晨科技有限公司
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