Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of polymer nano-fiber with uniform diameter

A nanofiber and polymer technology, applied in the direction of single-component synthetic polymer rayon, spinning solution preparation, fiber chemical characteristics, etc., can solve the problem of wide distribution of nanofiber diameter, difficulty in preparing fibers, unfavorable environmental sustainable development, etc. question

Active Publication Date: 2014-12-10
NANJING UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the template synthesis method is to use nano-scale porous membrane as a template to prepare nanofibers. In this method, the fiber diameter can be adjusted by the size of the template, but the template needs to be removed at the end, which is not conducive to the sustainable development of the environment.
At present, the most rapid development is the electrospinning method. Although this method is highly efficient and low in energy consumption, the diameter distribution of the prepared nanofibers is wide, and it is difficult to prepare fibers with a diameter below 100nm.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of polymer nano-fiber with uniform diameter
  • Preparation method of polymer nano-fiber with uniform diameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a) 20 grams of polystyrene and poly(4-vinylpyridine) copolymer (poly(4-vinylpyridine) accounts for 9% of the total volume of the copolymer, and the total molecular weight is 40,000 daltons) placed in In the reaction vessel, add 80 grams of acetic acid in the reaction vessel again;

[0023] b) Heating the reaction vessel containing the mixture to 110° C. and maintaining it for 15 hrs to obtain polymer nanofibers uniformly dispersed in acetic acid.

[0024] Depend on figure 1 It can be seen that the polymer nanofibers prepared in Example 1 have a uniform diameter, and the fiber diameter measured from the SEM image is 30 nm.

[0025] The prepared polymer nanofibers were put into ethanol solution, and the polymer nanofibers remained unchanged for 4 months.

Embodiment 2

[0027] a) Place 0.2 g of a copolymer of polystyrene and poly(4-vinylpyridine) (poly(4-vinylpyridine) accounts for 13% of the total volume of the copolymer, and the total molecular weight is 10,000 daltons) in In the reaction vessel, add 99.8 grams of a mixed solvent of ethanol and acetic acid (the mass ratio of ethanol to acetic acid is 4:1);

[0028] b) Heating the reaction vessel containing the mixture to 70° C. and keeping it for 5 hrs to obtain polymer nanofibers uniformly dispersed in the mixed solvent.

[0029] Depend on figure 2 It can be seen that the polymer nanofibers prepared in Example 2 have a uniform diameter, and the fiber diameter measured from the SEM image is 27 nm.

[0030] The prepared polymer nanofibers were put into ethanol solution, and the polymer nanofibers remained unchanged for 6 months.

Embodiment 3

[0032] a) Place 1 gram of polystyrene and poly(2-vinylpyridine) copolymer (poly(2-vinylpyridine) accounts for 25% of the total volume of the copolymer, and the total molecular weight is 50,000 Daltons) in In the reaction vessel, add 99 grams of acetic acid in the reaction vessel again;

[0033] b) Heating the reaction vessel containing the mixture to 120° C. and maintaining it for 24 hrs to obtain polymer nanofibers uniformly dispersed in acetic acid.

[0034] The polymer nanofibers prepared in this example have a uniform diameter, and the measured fiber diameter is 40 nm. Put it in ethanol solution and leave it for 6 months without any change.

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
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a polymer nano-fiber with uniform diameter. The preparation method comprises the following concrete steps: mixing a polymer with a solvent in a certain proportion, placing the mixture in a reaction container, and heating the reaction container filled with the polymer and the solvent at certain temperature for certain time to obtain the polymer nano-fiber uniformly dispersed in the solvent, wherein a copolymer comprises a block A and a block B, the block A is polystyrene, and the block B is poly(2-vinylpyridine) or poly(4-vinylpyridine). The polymer nano-fiber prepared by the method is very uniform in diameter and the preparation method of the polymer nano-fiber provided by the invention is simple and easy to implement, does not involve in chemical reaction, is low in energy consumption and high in large-scale production fitness.

Description

technical field [0001] The invention relates to a method for preparing polymer nanofibers with uniform diameters. The prepared polymer nanofibers have uniform and small diameters and micron-level lengths, and can be used in the preparation of separation membranes and drug release membranes. Background technique [0002] In the field of nanotechnology research, nanofibers have unique and superior physical and chemical properties, and are an extremely important research direction, thanks to their large specific surface area and high aspect ratio. The performance and use effect of polymer nanofibers are determined by the diameter, distribution and surface properties of the fibers, especially in membrane separation technology. The diameter and distribution of fibers are particularly important. [0003] In recent years, the preparation technology of polymer nanofibers has developed rapidly, and the existing methods include template synthesis, electrospinning, self-assembly, etc. ...

Claims

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/42D01D1/02
Inventor 汪勇姚雪萍杨智明范益群邢卫红
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com