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TiO2/ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane as well as preparation method and application thereof

A nanofiber membrane, polyacrylonitrile technology, applied in separation methods, fiber treatment, fiber chemical characteristics, etc., can solve the problems of poor bonding fastness, poor mechanical properties, uneven dispersion on the surface of textiles, etc., to increase compatibility. , good flexibility, improve the effect of removing formaldehyde

Active Publication Date: 2022-06-24
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two disadvantages in this technology: first, poor fastness to textiles, and second, uneven dispersion on the surface of textiles
Patent 201910230134.5 discloses a method for preparing ion-exchange fabric membranes. In this method, a certain amount of polymer is grafted on the surface of the fabric substrate in advance to ensure that the grafted polymer forms a covalent bond with the fiber surface of the fabric, and at the same time restricts the crossover of free water. Membrane flow, in which dimethylol dihydroxyethylene urea acts as a crosslinking agent, the main purpose is to improve the problem of poor mechanical properties

Method used

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  • TiO2/ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane as well as preparation method and application thereof
  • TiO2/ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane as well as preparation method and application thereof
  • TiO2/ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of TiO of this embodiment 2 The preparation method of / ethylene urea / polyacrylonitrile formaldehyde-removing nanofiber membrane, the steps are as follows:

[0027] Put the polyacrylonitrile raw material into an oven, dry it at 70°C for 6 hours, take 12 grams of dried polyacrylonitrile and 8 grams of ethylene urea and add it to 80 grams of N-N dimethylformamide solution, at 50 Stir at ℃ for 6h, dissolve the polyacrylonitrile and ethylene urea, and add 0.5 g of nano-TiO 2， Ultrasonic dispersion was performed at 70° C. for 1 hour to obtain an electrospinning solution.

[0028] The obtained electrospinning solution was transferred to a syringe for electrospinning to obtain a nanofiber membrane; then the obtained nanofiber membrane was transferred to a blast thermostat, and dried at 40° C. for 12 hours to remove the solvent. The electrospinning conditions were as follows: the electrospinning positive voltage was 12kV, the flow rate was 0.1ml / h, the electrospinning r...

Embodiment 2

[0034] A kind of TiO of this embodiment 2 The preparation method of / ethylene urea / polyacrylonitrile formaldehyde-removing nanofiber membrane, the steps are as follows:

[0035] The polyacrylonitrile raw material was put into an oven, dried at 50°C for 8 hours, 16 grams of dried polyacrylonitrile and 4 grams of ethylene urea were added to 80 grams of N-N dimethylformamide solution, and the solution was heated at 60 ℃. Stir for 10 h at ℃, dissolve the polyacrylonitrile and ethylene urea, and add 0.1 g of nano-TiO 2， Ultrasonic dispersion was performed at 70° C. for 1 hour to obtain an electrospinning solution.

[0036] The obtained electrospinning solution was transferred to a syringe for electrospinning to obtain a nanofiber membrane; then the obtained nanofiber membrane was transferred to a blast thermostat, and dried at 60° C. for 6 hours to remove the solvent. The electrospinning conditions are as follows: the electrospinning positive voltage is 20kV, the flow rate is 0.0...

Embodiment 3

[0039] A kind of TiO of this embodiment 2 The preparation method of / ethylene urea / polyacrylonitrile formaldehyde-removing nanofiber membrane, the steps are as follows:

[0040] Put the polyacrylonitrile raw material into an oven, dry it at 60 °C for 7 hours, take 10 grams of dried polyacrylonitrile and 10 grams of ethylene urea and add it into 80 grams of N-N dimethylformamide solution, at 55 °C After stirring for 8h under conditions, polyacrylonitrile and ethylene urea were dissolved and 0.7 g of nano-TiO was added. 2， Ultrasonic dispersion was performed at 20°C for 4 hours to obtain an electrospinning solution.

[0041] The obtained electrospinning solution was transferred to a syringe for electrospinning to obtain a nanofiber membrane; then the obtained nanofiber membrane was transferred to a blast thermostat, and dried at 50° C. for 8 hours to remove the solvent. The electrospinning conditions were as follows: the electrospinning positive voltage was 16kV, the flow rate...

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Abstract

The invention belongs to the field of nanofiber membrane preparation, and relates to a TiO2 / ethylene urea / polyacrylonitrile formaldehyde removal nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: drying a polyacrylonitrile raw material, adding the dried polyacrylonitrile raw material and ethylene urea into N-N dimethylformamide, stirring until complete dissolution, adding nano titanium dioxide, and carrying out ultrasonic dispersion to obtain a spinning solution; and performing electrostatic spinning on the spinning solution to obtain a nanofiber membrane, and drying to remove the solvent to obtain the TiO2 / ethylene urea / polyacrylonitrile formaldehyde-removing nanofiber membrane. According to the invention, photocatalytic formaldehyde-removing substance TiO2 nanoparticles, a formaldehyde chemical trapping agent and a polymer polyacrylonitrile are compounded, then an electrostatic spinning method is adopted to prepare the formaldehyde-removing functional superfine fiber, and the high specific surface area of the superfine fiber is utilized to adsorb free formaldehyde gas in the air; the concentration of the formaldehyde gas around the TiO2 nanoparticles and the formaldehyde chemical trapping agent is increased, the formaldehyde removal efficiency is improved, and the polymer fibers are good in flexibility and wider in application range.

Description

technical field [0001] The invention belongs to the field of nanofiber membrane preparation, and relates to a TiO 2 / ethylene urea / polyacrylonitrile formaldehyde-removing nanofiber membrane and preparation method and application thereof. Background technique [0002] Formaldehyde in life usually comes from decoration, decoration materials, furniture and coatings, etc., especially man-made panels and their adhesives. Man-made panels include veneer man-made panels, plywood, particleboard, fiberboard, laminate flooring, etc. Phenolic and urea-formaldehyde resins containing formaldehyde are used in the production process. According to statistics, more than 90% of domestic man-made boards are pressed with urea-formaldehyde glue, so free formaldehyde will be generated during application, which is often used in furniture manufacturing or other board applications. Human body has a certain impact. For different types of formaldehyde pollution, the treatment methods include activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/43D01D5/00D01F1/10D01F6/54B01D53/86B01D53/72
CPCD04H1/728D04H1/43D01D5/003D01F1/10D01F6/54B01D53/8668B01D2257/708B01D2255/802Y02A50/20
Inventor 郭正王泽博苗青潘玮王明环
Owner ZHONGYUAN ENGINEERING COLLEGE
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