Preparation method for super-hydrophobic and super-hydrophilic electrostatic spinning nanofiber composite membranes

A nanofiber and electrospinning technology, which is applied in fiber treatment, fiber type, textile and papermaking, etc., to achieve the effect of fine fiber diameter, simple preparation method and stable spinning process

Inactive Publication Date: 2012-07-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is to provide a method for preparing a superhydrophobic and superhydrophilic nanofiber composite membrane and improving

Method used

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  • Preparation method for super-hydrophobic and super-hydrophilic electrostatic spinning nanofiber composite membranes
  • Preparation method for super-hydrophobic and super-hydrophilic electrostatic spinning nanofiber composite membranes

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The preparation of superhydrophobic nanofiber composite film: polyethylene terephthalate PET / polyvinyl alcohol PVA mass ratio is 1 / 1, and the degree of alcoholysis of PVA is 88%, trifluoroacetic acid and dichloromethane 20mL (volume than 9 / 1) as a mixed solvent. A solution with a concentration of 15 wt % was prepared, stirred by magnetic force, dissolved at a temperature of 15° C., and dissolved for 20 hours, and left to stand to obtain a uniform and transparent mixed solution. Inject into the syringe of the electrospinning equipment, the spinning temperature is 30°C, the propulsion speed of the spinning solution is 0.002mm / min, the spinning voltage is 20kV, and the distance from the spinning needle to the receiving plate is 15cm, through the electrospinning instrument Prepare the film. Then the composite film was heat treated at a temperature of 120° C. for 5 hours. Then the composite film was dried in a vacuum oven for 24 hours at a temperature of 25°C. The treated...

Embodiment 2

[0029] The preparation of superhydrophobic nanofiber composite film: polyethylene terephthalate PET / polyvinyl alcohol PVA mass ratio is 1 / 2, and the degree of alcoholysis of PVA is 88%, trifluoroacetic acid and dichloromethane 20mL (volume than 9 / 1) as a mixed solvent. A solution with a concentration of 15 wt % was prepared, stirred by magnetic force, dissolved at a temperature of 15° C., and dissolved for 20 hours, and left to stand to obtain a uniform and transparent mixed solution. Inject into the syringe of the electrospinning equipment, the spinning temperature is 30°C, the propulsion speed of the spinning solution is 0.002mm / min, the spinning voltage is 20kV, and the distance from the spinning needle to the receiving plate is 15cm, through the electrospinning instrument Prepare the film. Then the composite film was heat treated at a temperature of 120° C. for 5 hours. Then the composite film was dried in a vacuum oven for 24 hours at a temperature of 25°C. The treated...

Embodiment 3

[0033]The preparation of superhydrophobic nanofiber composite film: polyethylene terephthalate PET / polyvinyl alcohol PVA mass ratio is 1 / 1, and the degree of alcoholysis of PVA is 88%, trifluoroacetic acid and dichloromethane 20mL (volume than 9 / 1) as a mixed solvent. A solution with a concentration of 12wt% was prepared, stirred by magnetic force, dissolved at a temperature of 15° C., dissolved for 20 hours, and left to stand to obtain a uniform and transparent mixed solution. Inject into the syringe of the electrospinning equipment, the spinning temperature is 30°C, the propulsion speed of the spinning solution is 0.002mm / min, the spinning voltage is 20kV, and the distance from the spinning needle to the receiving plate is 15cm, through the electrospinning instrument Prepare the film. Then the composite film was heat treated at a temperature of 120° C. for 5 hours. Then the composite film was dried in a vacuum oven for 24 hours at a temperature of 25°C. The treated compos...

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Abstract

A preparation method for super-hydrophobic and super-hydrophilic electrostatic spinning nanofiber composite membranes belongs to the field of the nanofiber composite membranes. For the method, the raw materials are easy to obtain, the process is simple, and the operation is convenient and quick. In the method, the electrostatic spinning technology is mainly adopted to prepare the polymer nanofiber composite membranes, different solvents and different treatment methods are adopted, the nanofiber composite membranes are super-hydrophobic or super-hydrophilic, and the mechanical property is improved. The preparation method is simple, the spinning process is stable, the fiber is small in diameter and light in weight, no pollution is caused, and the preparation method is widely applied to the fields of filter materials, construction paint, mineral floatation and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to the preparation of superhydrophobic and superhydrophilic nanofiber composite membranes and a method for improving their mechanical properties. Background technique [0002] Wetting is a common interface phenomenon and one of the important characteristics of solid surfaces, which is usually characterized by the contact angle of a liquid on a solid surface. Superhydrophobic refers to the phenomenon that the contact angle of the surface to water is greater than 150°, and superhydrophilic refers to the phenomenon that the contact angle to water is less than 5°. Generally speaking, the wettability is determined by the chemical composition and microscopic geometric structure of the solid surface. Appropriate surface microstructure and solid surface with high or low surface free energy and suitable surface microstructure are the key factors to produce superhydrophi...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/728D06M13/123D06M101/32D06M101/24
Inventor 石艳吕梦青曹鼎付志峰
Owner BEIJING UNIV OF CHEM TECH
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