Polylactic acid electrostatic spinning/acetate fiber needle-punched composite filter material and preparation method thereof

A composite technology of acetate fiber and acupuncture, applied in electrospinning, fiber treatment, separation methods, etc., can solve the problems of high melt viscosity and poor processability, achieve low breathing resistance and improve filtration efficiency

Inactive Publication Date: 2019-04-09
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PLA also has the characteristics of high melt viscosity and poor processability.

Method used

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  • Polylactic acid electrostatic spinning/acetate fiber needle-punched composite filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A polylactic acid electrospinning / fiber acetate needle-punched composite filter material is prepared by using polylactic acid as a raw material, preparing polylactic acid nanofibers through electrospinning, and depositing them on the surface of acetate fiber needle-punched nonwoven materials.

[0021] The preparation method of the above-mentioned polylactic acid electrospinning / fiber acetate needle-punched composite filter material comprises the following steps:

[0022] (1) Accurately weigh polylactic acid particles and dissolve them in a mixed solvent of acetone and N,N-dimethylformamide with a volume ratio of 5:1, and stir for 2 hours to form a stable and uniform electrospinning solution, wherein poly The mass fraction of lactic acid is 5%;

[0023] (2) Stand still for 10 minutes, fix the cellulose acetate needle-punched nonwoven fabric on the electrospinning receiving device, pour the electrospinning liquid into the syringe, keep the spinneret and the center of the ...

Embodiment 2

[0026] A polylactic acid electrospinning / fiber acetate needle-punched composite filter material is prepared by using polylactic acid as a raw material, preparing polylactic acid nanofibers through electrospinning, and depositing them on the surface of acetate fiber needle-punched nonwoven materials.

[0027] The preparation method of the above-mentioned polylactic acid electrospinning / fiber acetate needle-punched composite filter material comprises the following steps:

[0028] (1) Accurately weigh polylactic acid particles and dissolve them in a mixed solvent of acetone and N,N-dimethylformamide with a volume ratio of 5:1, add 0.01% NaCl, and stir for 3 hours to form a stable and uniform electrospun Silk liquid, wherein the mass fraction of polylactic acid is 8%. ;

[0029] (2) Stand still for 20 minutes, fix the cellulose acetate needle-punched nonwoven fabric on the electrospinning receiving device, pour the electrospinning solution into the syringe, keep the spinneret and...

Embodiment 3

[0032] A polylactic acid electrospinning / fiber acetate needle-punched composite filter material is prepared by using polylactic acid as a raw material, preparing polylactic acid nanofibers through electrospinning, and depositing them on the surface of acetate fiber needle-punched nonwoven materials.

[0033] The preparation method of the above-mentioned polylactic acid electrospinning / fiber acetate needle-punched composite filter material comprises the following steps:

[0034] (1) Accurately weigh polylactic acid particles and dissolve them in a mixed solvent of acetone and N,N-dimethylformamide at a volume ratio of 5:1, then add NaCl, the addition of NaCl is 0.1% of polylactic acid, stir 4h, forming a stable and uniform electrospinning solution, wherein the mass fraction of polylactic acid is 12%;

[0035] (2) Stand still for 30 minutes, fix the cellulose acetate needle-punched nonwoven fabric on the electrospinning receiving device, pour the electrospinning liquid into the ...

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Abstract

The invention discloses a polylactic acid electrostatic spinning/acetate fiber needle-punched composite filter material and a preparation method thereof. Polylactic acid is used as a raw material andis prepared into polylactic acid nanofibers through electrostatic spinning and the polylactic acid nanofibers are deposited on the surface of an acetate fiber needle-punched non-woven material. The preparation method comprises the following steps: (1) accurately weighing polylactic acid particles and dissolving in a mixed solvent of acetone and N,N-dimethylformamide according to the volume ratio of 5 to 1; stirring for 2 to 4h to form an electrostatic spinning solution; fixing an acetate fiber needle-punched non-woven fabric on an electrostatic spinning receiving device; pouring the electrostatic spinning solution into an injector and keeping a spinning nozzle and the center of a receiving device on the same horizontal line; adjusting a flow speed, a receiving distance and spinning voltage; after spinning for 40 to 80min, forming a polylactic acid/acetate fiber composite filter material; and (3) drying the polylactic acid/acetate fiber composite filter material in a drying oven at thetemperature of 40 to 60 DEG C to obtain the polylactic acid electrostatic spinning/acetate fiber needle-punched composite filter material. The polylactic acid electrostatic spinning/acetate fiber needle-punched composite filter material has the advantages that the filtering efficiency of needle-punched materials can be remarkably improved, and relatively low respiratory resistance is ensured, so that an efficient and low-resistance air filtering material is prepared.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a polylactic acid electrospinning / fiber acetate needle-punched composite filter material and a preparation method thereof. Background technique [0002] With the development of economy, environmental problems are becoming more and more serious. In addition to measures such as strengthening environmental protection and controlling pollution sources, the most effective protective measures are the use of air filter materials, milk protective masks, and indoor air purifiers. Most of the air filter materials currently used in the market use melt-blown non-manufactured cloth as their filter layer. However, due to the limitation of fiber diameter, the filter performance of the material is not good enough. At the same time, the traditional petroleum-grade melt-blown raw materials such as milk polypropylene, polyethylene, and polyamide cannot be degraded, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14D01D5/00D04H1/4374
CPCB01D39/14B01D2239/10D01D5/003D01D5/0084D04H1/4374
Inventor 章学如高大伟王春霞王丽丽陆振乾邱文娟贾高鹏陈郯贝新宇东汤春牛力恒朱河山
Owner YANCHENG INST OF TECH
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