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Preparation method of constant-hydrophilic graft-modified chlorinated polymer micro/nano fiber film

A technology of grafting modification and nanofibers, which can be used in fiber processing, textiles, papermaking, non-woven fabrics, etc., and can solve problems such as difficult grafting reactions

Active Publication Date: 2014-07-16
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chlorine-containing polymers have strong chemical stability, especially the high C-Cl bond energy, and it is difficult for free radicals to directly initiate grafting reactions

Method used

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  • Preparation method of constant-hydrophilic graft-modified chlorinated polymer micro/nano fiber film
  • Preparation method of constant-hydrophilic graft-modified chlorinated polymer micro/nano fiber film
  • Preparation method of constant-hydrophilic graft-modified chlorinated polymer micro/nano fiber film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. PVC dehydrochlorination treatment

[0024] Add 15.00g of SG7 type PVC resin and 10wt% NaOH solution of 10 times the mass (150.00g) into a 250mL three-necked bottle, set up a reflux device, heat to the set temperature (102°C), boil and reflux for 2h, and cool to At room temperature, vacuum filter, wash with a large amount of distilled water until all residues are removed, then transfer the product to a jar and vacuum dry to constant weight to obtain a reddish dehydrochlorinated polyvinyl chloride resin (DPVC).

[0025] 2. Preparation of spinning solution

[0026] Weigh 1.30g of DPVC resin and dissolve it in 10.00g of THF / DMF mixed solvent, wherein the mixing mass ratio of THF and DMF is 40 / 60, place it in a rotary air bath constant temperature oscillator at 25°C for 24h, fully dissolve and mix evenly, and then ultrasonically eliminate Bubble.

[0027] 3. Preparation of DPVC nanofiber membrane by electrospinning

[0028] Use a 10mL disposable sterile syringe to abso...

Embodiment 2

[0034] 1. PVC dehydrochlorination treatment

[0035] Add 15.00g of SG7 type polyvinyl chloride (PVC) resin and 10wt% NaOH solution of 10 times the mass (150.00g) into a 250mL three-necked bottle, set up a reflux device, heat to the set temperature (102°C), boil and reflux for 2h, After the reaction, cool to room temperature, vacuum filter, wash with a large amount of distilled water until all residues are removed, then transfer the product to a jar and vacuum dry to constant weight to obtain reddish DPVC.

[0036] 2. Preparation of spinning solution

[0037] Weigh 1.30g of DPVC resin and dissolve it in 10.00g of THF / DMF mixed solvent, wherein the mixing mass ratio of THF and DMF is 50 / 50, place it in a rotary air bath constant temperature shaker at 25°C for 24h, fully dissolve and mix evenly, and then sonicate defoaming.

[0038] 3. Preparation of DPVC nanofiber membrane by electrospinning

[0039] Use a 10mL disposable sterile syringe to absorb the above prepared spinning ...

Embodiment 3

[0045] 1. PVC dehydrochlorination treatment

[0046] Add 15.00g of SG7 type PVC resin and 10wt% NaOH solution of 10 times the mass (150.00g) into a 250mL three-necked bottle, set up a reflux device, heat to the set temperature (102°C), boil and reflux for 2h, and cool to At room temperature, vacuum filter, wash with a large amount of distilled water until all residues are removed, then transfer the product to a jar and vacuum dry to constant weight to obtain reddish DPVC.

[0047] 2. Preparation of spinning solution

[0048] Weigh 1.30g of DPVC resin and dissolve it in 10.00g of THF / DMF mixed solvent, wherein the mixing mass ratio of THF and DMF is 60 / 40, place it in a rotary air bath constant temperature shaker at 25°C for 24h, fully dissolve and mix evenly, and then ultrasonically eliminate Bubble.

[0049] 3. Preparation of DPVC nanofiber membrane by electrospinning

[0050] Use a 10mL disposable sterile syringe to absorb the above prepared spinning solution, clamp it on...

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Abstract

The invention provides a preparation method of a constant-hydrophilic graft-modified chlorinated polymer micro / nano fiber film, and relates to electric-spinning preparation and surface modification of the chlorinated polymer micro / nano fiber film. According to the method for preparing the chlorinated polymer micro / nano fiber film through electrospinning and surface graft polymerization hydrophilic modification, the problems that pressure drop is large, flux is small and the film is prone to contamination during a water system is treated through hydrophobic film material can be solved on the basis of less damages to the film structure. The method includes performing mild dehydrochlorination on chlorinated polymer resin during reflux under the condition of alkaline catalysis, preparing spinning solution, utilizing a self-made electrospinning device, adjusting spinning process parameters, obtaining the micro / nano fiber film with uniform fiber morphology and good mechanical property, then performing surface modification by the method of hydrophilic monomer surface grafting polymerization initiated by azodiisobutyronitrile, and obtaining the chlorinated polymer micro / nano fiber film with high hydrophilicity. The film can be applied to efficient frame-type filtering films.

Description

technical field [0001] The invention relates to electrospinning preparation and surface modification of chlorine-containing polymer micro / nano fiber membranes, especially the persistent hydrophilic graft modification of chlorine-containing polymer micro / nano fiber membranes. Background technique [0002] Electrospinning technology is currently the only effective method that can directly and continuously prepare nanofibers. The micro / nanofibers prepared by electrospinning have the advantages of large specific surface area, high porosity, large aspect ratio, and good mechanical properties. Combined with nano-scale chemical substances, it is very suitable for adsorption and filtration materials. The technical principle is that when the high-viscosity polymer solution or melt is under the action of a high-voltage electrostatic field, it is simultaneously affected by the electric field force and surface tension. As the electric field strength increases, the same-sex charges in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D06M14/10
Inventor 魏忠吴春林王贺云
Owner SHIHEZI UNIVERSITY
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