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Method for rapidly preparing superfine whole-body porous fiber

A porous fiber and whole-body technology, which is applied in the field of rapid preparation of ultra-fine whole-body porous fibers, can solve the problem of little improvement in fiber specific surface area, achieve high production efficiency, large fiber specific surface area, and reduce costs

Active Publication Date: 2016-06-29
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the porous fibers prepared by the phase separation method usually only exist on the surface of the fibers, and have little effect on the improvement of the specific surface area of ​​the fibers.

Method used

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  • Method for rapidly preparing superfine whole-body porous fiber
  • Method for rapidly preparing superfine whole-body porous fiber
  • Method for rapidly preparing superfine whole-body porous fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add a certain amount of ethyl cellulose to a mixed solvent of 7mL ethanol and 3mL water, stir at room temperature to obtain a uniform solution, add a small amount of polyvinylpyrrolidone to the solution, and continue stirring at room temperature to obtain a transparent spinning solution. Wherein ethyl cellulose: the mass ratio of polyvinylpyrrolidone is 9:1. The spinning liquid is injected into the spinneret, and centrifugal spinning is carried out under the conditions of a rotating speed of 3000 rpm and a receiving distance of 10 cm to obtain ultrafine porous fibers throughout the body. The SEM image is as follows figure 1 , 2 shown.

Embodiment 2

[0038] Add a certain amount of ethyl cellulose to a mixed solvent of 8mL ethanol and 2mL water, stir at room temperature to obtain a uniform solution, add a small amount of polyvinylpyrrolidone to the solution, and continue stirring at room temperature to obtain a transparent spinning solution. Wherein ethyl cellulose: the mass ratio of polyvinylpyrrolidone is 8:2. The spinning liquid is injected into the spinneret, and centrifugal spinning is carried out under the conditions of a rotating speed of 3000 rpm and a receiving distance of 10 cm to obtain ultrafine porous fibers throughout the body. The SEM image is as follows image 3 , 4 shown.

Embodiment 3

[0040] Add a certain amount of ethyl cellulose to a mixed solvent of 9mL ethanol and 1mL water, stir at room temperature to obtain a uniform solution, add a small amount of polyvinylpyrrolidone to the solution, and continue stirring at room temperature to obtain a transparent spinning solution. Wherein ethyl cellulose: the mass ratio of polyvinylpyrrolidone is 6:4. The spinning liquid is injected into the spinneret, and centrifugal spinning is carried out under the conditions of a rotating speed of 3000 rpm and a receiving distance of 10 cm to obtain ultrafine porous fibers throughout the body. The SEM image is as follows Figure 5 , 6 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to the field of preparation of superfine fiber materials, and aims at providing a method for rapidly preparing a superfine whole-body porous fiber.The method comprises the steps that ethyecellulose is added into a mixed solvent of ethyl alcohol and water, and stirring is performed at the indoor temperature to obtain a uniform solution; polyvinylpyrrolidone is added into the solution, stirring continues to be performed at the indoor temperature to obtain a transparent spinning solution; the transparent spinning solution is injected into a spinning device for centrifugal spinning, and the superfine whole-body porous fiber is obtained.According to the superfine whole-body porous fiber, the porous characteristic is obvious, and the fiber specific area is larger; no pore forming agent or pore enlarging agent is needed, and residual impurities in the fiber are reduced; the situation that multiple pores are produced or the number of pores is increased through an aftertreatment method is not needed, and the structure and morphology of the fiber are prevented from being damaged.The adopted ethyecellulose raw materials and solvent are easy to obtain, the pressure of adopting synthetic materials is further relieved, and the improvement effect is achieved in the environmental protection aspect; the technological process is simple, and production efficiency is high.

Description

technical field [0001] The invention belongs to the field of preparation of ultrafine fiber materials, and in particular relates to a rapid preparation method of ultrafine whole body porous fibers. Background technique [0002] The special properties endowed by ultrafine fibers, submicron and nanofibers due to the size effect make them have broad application prospects in biomedicine, tissue scaffolds, battery separators, air filtration and sensors, and have attracted attention from various fields. [0003] Although microfibers, submicron and nanofibers have higher specific surface areas, compared with microporous fibers, mesoporous fibers or other porous fibers, the specific surface area is still small. Therefore, it is limited in the fields of catalytic carrier, pollution adsorption, fine filtration, etc., and the effect of fibers with porous structure on cell culture is better than that of fibers with smooth surface. Therefore, the preparation of ultrafine fibers, submicr...

Claims

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Application Information

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IPC IPC(8): D01D5/24D01D5/18D01D1/02
CPCD01D1/02D01D5/18D01D5/24
Inventor 杨斌侯腾
Owner ZHEJIANG SCI-TECH UNIV