Preparation method of temperature-sensitive hollow nanofiber membrane

A temperature-responsive, nanofiber membrane technology, applied in fiber type, fiber processing, conjugated synthetic polymer rayon, etc., can solve the problem of stimuli-responsive intelligent hollow nanofibers that have not been reported in literature, and achieve easy operation. , the process is simple, the effect of good stability

Inactive Publication Date: 2018-01-19
DONGHUA UNIV
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of stimuli-responsive smart hollow nanofibers by

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 temperature-sensitive hollow nanofiber membrane
  • Preparation method of temperature-sensitive hollow nanofiber membrane
  • Preparation method of temperature-sensitive hollow nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] (1) Add N-isopropylacrylamide, octadecyl acrylate and N-methylolacrylamide into tetrahydrofuran at a molar ratio of 100:3:20 to obtain a reaction solution with a total monomer mass concentration of 45.9%, Under nitrogen atmosphere, stir and react at 65°C for 30min, then add 0.5% initiator azobisisobutyronitrile based on the total mass of the monomer, continue to stir and react at 65°C for 24h, cool down to room temperature, add n-hexane until the white flocculent is completely precipitated The product was dissolved in tetrahydrofuran, and then n-hexane was added until a precipitate formed, filtered at room temperature, and vacuum-dried to obtain a temperature-responsive polymer in the form of white powder.

[0038] (2) Dissolve the temperature-responsive polymer obtained in step (1) in a mixed solvent of deionized water and ethanol with a mass ratio of 1:2, and magnetically stir at room temperature for 12 hours to obtain a polymer solution with a mass...

Example Embodiment

[0041] Example 2

[0042] (1) Add N-isopropylacrylamide, octadecyl acrylate and N-methylolacrylamide into tetrahydrofuran at a molar ratio of 100:3:20 to obtain a reaction solution with a total monomer mass concentration of 45.9%, Under nitrogen atmosphere, stir and react at 65°C for 30min, then add 0.5% initiator azobisisobutyronitrile based on the total mass of the monomer, continue to stir and react at 65°C for 24h, cool down to room temperature, add n-hexane until the white flocculent is completely precipitated The product was dissolved in tetrahydrofuran, and then n-hexane was added until a precipitate formed, filtered at room temperature, and vacuum-dried to obtain a temperature-responsive polymer in the form of white powder.

[0043] (2) Dissolve the temperature-responsive polymer obtained in step (1) in a mixed solvent of deionized water and ethanol with a mass ratio of 1:2, and magnetically stir at room temperature for 12 hours to obtain a polymer solution with a mass...

Example Embodiment

[0046] Example 3

[0047] (1) Add N-isopropylacrylamide, octadecyl acrylate and N-methylolacrylamide into tetrahydrofuran at a molar ratio of 100:3:20 to obtain a reaction solution with a total monomer mass concentration of 45.9%, Under nitrogen atmosphere, stir and react at 65°C for 30min, then add 0.5% initiator azobisisobutyronitrile based on the total mass of the monomer, continue to stir and react at 65°C for 24h, cool down to room temperature, add n-hexane until the white flocculent is completely precipitated The product was dissolved in tetrahydrofuran, and then n-hexane was added until a precipitate formed, filtered at room temperature, and vacuum-dried to obtain a temperature-responsive polymer in the form of white powder.

[0048] (2) Dissolve the temperature-responsive polymer obtained in step (1) in a mixed solvent of deionized water and ethanol with a mass ratio of 1:2, and magnetically stir at room temperature for 12 hours to obtain a polymer solution with a mass...

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
Average outer diameteraaaaaaaaaa
Average inner diameteraaaaaaaaaa
Average outer diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of a temperature-sensitive hollow nanofiber membrane. The preparation method comprises the following steps: copolymerizing temperature-sensitive monomers,monomers capable of forming physical crossing points and monomers capable of forming chemical crossing points by heating by free radical solution polymerization to obtain a temperature-sensitive polymer; adding the temperature-sensitive polymer in a solvent and stirring to obtain a polymer solution as a shell spinning solution, taking viscous oil as a core layer spinning solution, and carrying out coaxial electro-spinning to obtain a nanofiber membrane with a core-shell structure; and carrying out heat treatment, and extracting the core layer viscous oil by an organic solvent to obtain the final product. By the coaxial electro-spinning method, the outer diameter, inner diameter and wall thickness of a product can be controlled effectively, a preparation process is environmentally friendly, and conditions are gentle. The obtained temperature-sensitive hollow nanofiber membrane can stably exist in water and cannot be dissolved, has rapid temperature sensitivity, and can be applied to atemperature sensor, a drug controlled release carrier, a cell culture substrate or a support, oil-water separation or biological substance purification film.

Description

technical field [0001] The invention belongs to the field of intelligent nanofiber materials, in particular to a method for preparing a temperature-responsive hollow nanofiber membrane. Background technique [0002] Stimuli-responsive nanofibers are smart polymer nanofibers with diameters usually less than 1000 nm that can change their physical and chemical properties in response to external stimuli. External stimuli include environmental temperature or acid-base (pH) changes, light, electric fields, magnetic fields, or specific molecules. The physical and chemical properties of nanofibers that change in response to external stimuli may include size, hydrophilicity and hydrophobicity, refractive index, transmittance, mechanical strength, color, or conductivity. Compared with bulk smart hydrogels, smart nanofibers respond much faster to external stimuli, because the stimulus response speed of smart materials is inversely proportional to its size, the smaller the size, the ea...

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
IPC IPC(8): D04H1/4382D04H1/728D01D5/34D01D5/00D01F8/10D06M10/00D06M13/07D06M101/26
Inventor 査刘生郑勰周一凡
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap