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Preparation method for micro and nano PET fiber with large pore volumes

A micro-nano, porous carbon fiber technology, applied in fiber processing, textiles and papermaking, non-woven fabrics, etc., can solve the problems of application limitations, low strength of PET micro-nano fibers, limited porosity and specific surface area, etc. The method is simple and feasible , the effect of improving mechanical properties and spinning stability, and improving specific surface area and pore volume

Active Publication Date: 2015-11-04
深圳市和龙电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively low strength of PET micro-nano fibers prepared by electrospinning, and the limited porosity and specific surface area, its application is limited.

Method used

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  • Preparation method for micro and nano PET fiber with large pore volumes
  • Preparation method for micro and nano PET fiber with large pore volumes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of the high pore volume micronano PET fiber of the present embodiment is as follows:

[0017] First dry the PET slices and self-made porous carbon fiber (refer to patent CN104692381A for the method) in a vacuum oven, measure 20 mL of a mixed solvent of trifluoroacetic acid and methylene chloride with a volume ratio of 2:1 in an iodine bottle, and weigh the PET A mixed solution with a solution concentration of 12% was prepared from 3% by mass porous carbon fiber and PET. The composite fibers were prepared by electrostatic spinning on a magnetic stirrer at room temperature for 8 hours. The preparation conditions were as follows: the receiving distance was 16 cm, the spinning voltage was 20-25 kV, and the propulsion speed was 0.001 mm / s. The prepared composite fiber membrane was soaked in 10% NaOH solution for 10 min, rinsed with distilled water several times, and then dried in a vacuum oven at 100 °C for 24 h to obtain micro-nano PET fibers with hig...

Embodiment 2

[0020] The preparation method of the high pore volume micronano PET fiber of the present embodiment is as follows:

[0021] The PET slices and self-made porous carbon fibers were first dried in a vacuum oven. Measure 20 mL of a mixed solvent of trifluoroacetic acid and dichloromethane with a volume ratio of 3:1 in an iodine measuring bottle. Weigh the porous carbon fiber with 2% PET mass and PET to make a mixed solution with a solution concentration of 16%. The composite fibers were prepared by electrostatic spinning on a magnetic stirrer at room temperature for 8 hours. The preparation conditions were as follows: the receiving distance was 16 cm, the spinning voltage was 20-25 kV, and the propulsion speed was 0.001 mm / s. The prepared composite fiber membrane was soaked in a 5% NaOH solution for 15 min, rinsed with distilled water several times, and then dried in a vacuum oven at 100 °C for 24 h to obtain micro-nano PET fibers with high pore volume.

Embodiment 3

[0023] The preparation method of the high pore volume micronano PET fiber of the present embodiment is as follows:

[0024] The PET slices and self-made porous carbon fibers were first dried in a vacuum oven. Measure 20 mL of a mixed solvent of trifluoroacetic acid and dichloromethane with a volume ratio of 1:1 in an iodine measuring bottle. Weigh 1% of the PET mass of porous carbon fiber and PET to prepare a mixed solution with a solution concentration of 16%. The composite fibers were prepared by electrostatic spinning on a magnetic stirrer at room temperature for 8 hours. The preparation conditions were as follows: the receiving distance was 16 cm, the spinning voltage was 20-25 kV, and the propulsion speed was 0.001 mm / s. The prepared composite fiber membrane was soaked in 8% NaOH solution for 15 min, washed several times with distilled water, and then dried in a vacuum oven at 100 °C for 24 h to obtain micro-nano PET fibers with high pore volume.

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Abstract

The invention discloses a preparation method for micro and nano PET fiber with large pore volumes. Polyethylene terephthalate (PET) and a porous material with large specific surface area are used as starting material. Trifluoroacetic acid and dichloromethane are used as mixed solvent to prepare a mixed solution with certain concentration. Complex fiber with a micro and nano structure is made by electrostatic spinning. The complex fiber is etched in a certain aqueous alkali, then washed repeatedly with distilled water and dried. Thus, the micro and nano PET fiber with large pore volumes is obtained. Due to partially exposed porous carbon fiber at the surface of the fiber and high porosity of electrostatic spinning, the prepared electrospinning has large pore volumes. The micro and nano PET fiber with large pore volumes will have many applications in the fields of catalysis and adsorption and can be used as adsorbent material or catalyst carrier. The preparation condition of the method is mild and the method is easy and feasible.

Description

Technical field [0001] The present invention is a technical field that combines the field of adsorption and catalytic and textile technology, which involves a preparation method of high -pore capacity micro -nano PET fiber. Background technique [0002] The unique pore structure and high pore rate of micro -nano fibers prepared by electrostatic spinning technology have relatively low density, which has received widespread attention in the fields of catalytic, filtering, biomedicine and other fields.In order to further expand the application field of PET fiber, use electrostatic spinning technology to prepare a relatively high strength and high -Kong Rong PET micr -nano fiber, so that it has broader application prospects in the fields of catalytic, adsorption, and battery diaphragm.Because PET micro -nano fibers prepared by electrostatic spinning law are relatively low, and the pore rate and ratio of the surface area are limited, it is limited. Invention content [0003] In order...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00D04H1/435
Inventor 王利娜李思雨石素宇王延伟辛长征宋会芬杨秀琴
Owner 深圳市和龙电子有限公司
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