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Polyvinyl alcohol nanofiber membrane with excellent water resistance, preparation method thereof and composite filter material

A technology of nanofiber membrane and polyvinyl alcohol, which is applied in the directions of fiber processing, separation methods, chemical instruments and methods, etc., can solve the problems of difficult to realize electrospinning of polyvinyl alcohol nanofiber membrane, decrease of solid content, increase of viscosity, etc. , to increase physical cross-linking points, reduce product toxicity, and improve water resistance.

Active Publication Date: 2020-01-31
スンナテクノロジーズシャンハイカンパニーリミテッド
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the common polyvinyl alcohol is a water-soluble polymer, when its nanofiber membrane is directly used as a mask filter layer or industrial filter material, it is easy to absorb moisture in the air and dissolve and fail
Therefore, the method of increasing the degree of alcoholysis and polymerization of polyvinyl alcohol is usually used to improve the water resistance of the material, but this method will increase the viscosity of the polyvinyl alcohol electrospinning solution, while the solid content will decrease significantly, which is difficult to achieve Electrospinning of Polyvinyl Alcohol Nanofiber Membranes

Method used

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  • Polyvinyl alcohol nanofiber membrane with excellent water resistance, preparation method thereof and composite filter material
  • Polyvinyl alcohol nanofiber membrane with excellent water resistance, preparation method thereof and composite filter material
  • Polyvinyl alcohol nanofiber membrane with excellent water resistance, preparation method thereof and composite filter material

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Effect test

Embodiment 1

[0034] A method for preparing polyvinyl alcohol nanofibers with excellent water resistance, comprising the steps of:

[0035] 1) Add 5 parts of polyvinyl alcohol PVA-2099 to 100 parts by weight of water, heat and stir until completely dissolved, and prepare a polyvinyl alcohol solution;

[0036] 2) Add 5 parts of polyvinyl formal to 100 parts by weight of acetic acid, stir until completely dissolved to obtain a polyvinyl formal solution; wherein, the degree of polymerization of polyvinyl formal is 500, and the degree of acetalization is 15%;

[0037] 3) Add 15 parts of polyvinyl formal solution to 100 parts by weight of polyvinyl alcohol solution, stir until mixed evenly, and prepare an electrospinning solution;

[0038] 4) The polyvinyl alcohol nanofiber membrane was prepared by the electrospinning process using the above-mentioned spinning material solution: use a 20mL needle to absorb the material solution, cover with a needle with an inner diameter of 0.8mm, and squeeze ou...

Embodiment 2

[0041] A method for preparing polyvinyl alcohol nanofibers with excellent water resistance, comprising the steps of:

[0042] 1) Add 5 parts of polyvinyl alcohol PVA-2099 to 100 parts by weight of water, heat and stir until completely dissolved, and prepare a polyvinyl alcohol solution;

[0043] 2) Add 5 parts of polyvinyl formal to 100 parts by weight of formic acid, stir until completely dissolved to obtain a polyvinyl formal solution; wherein, the degree of polymerization of polyvinyl formal is 500, and the degree of acetalization is 15%;

[0044] 3) Add 15 parts of polyvinyl formal solution to 100 parts by weight of polyvinyl alcohol solution, stir until mixed evenly, and prepare an electrospinning solution;

[0045] 4) The polyvinyl alcohol nanofiber membrane was prepared by the electrospinning process using the above-mentioned spinning material solution: use a 20mL needle to absorb the material solution, cover with a needle with an inner diameter of 0.8mm, and squeeze ou...

Embodiment 3

[0048] A method for preparing polyvinyl alcohol nanofibers with excellent water resistance, comprising the steps of:

[0049] 1) Add 10 parts of polyvinyl alcohol PVA-2199 to 100 parts by weight of water, heat and stir until completely dissolved, and prepare a polyvinyl alcohol solution;

[0050] 2) Add 5 parts of polyvinyl formal to 100 parts by weight of acetic acid, stir until completely dissolved to obtain a polyvinyl formal solution; wherein, the degree of polymerization of polyvinyl formal is 500, and the degree of acetalization is 15%;

[0051] 3) Add 15 parts of polyvinyl formal solution to 100 parts by weight of polyvinyl alcohol solution, stir until mixed evenly, and prepare an electrospinning solution;

[0052] 4) The polyvinyl alcohol nanofiber membrane was prepared by the electrospinning process using the above-mentioned spinning material solution: use a 20mL needle to absorb the material solution, cover with a needle with an inner diameter of 0.8mm, and squeeze o...

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Abstract

The invention discloses a polyvinyl alcohol nanofiber membrane with excellent water resistance, a preparation method thereof and a composite filter material. The method includes mixing water with polyvinyl alcohol, heating and stirring until the mixture is completely dissolved to obtain a polyvinyl alcohol solution; mixing an organic solvent with polyvinyl formal to obtain a polyvinyl formal solution; mixing the polyvinyl alcohol solution and the polyvinyl formal solution to obtain an electrostatic spinning solution; preparing the polyvinyl alcohol nanofiber membrane by using the electrostaticspinning solution through an electrostatic spinning process; and preforming heat treatment on the polyvinyl alcohol nanofiber membrane to obtain the polyvinyl alcohol nanofiber membrane with excellent water resistance. According to the method, a macromolecular nucleating agent polyvinyl formal is added, so that the crystallinity of polyvinyl alcohol nanofibers is improved, physical crosslinking points are increased, and the water resistance of the fibers is greatly improved. The ultra-high water-resistant polyvinyl alcohol can be used as a filter material of a mask filter layer, can efficiently adsorb salt and oily particles in air, and has basically no attenuation in filtering performance.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to a nanofiber membrane and a preparation method thereof. Background technique [0002] Polyvinyl alcohol is a high-molecular organic substance with high safety. It is non-toxic to the human body, has no side effects, and has good biocompatibility, especially in medical treatment such as its water-based gel in ophthalmology, wound dressing and artificial joints It is widely used and has basically no pollution to the environment. It is a real green polymer material. Polyvinyl alcohol has unique oil resistance, abrasion resistance, solvent resistance, film-forming properties, etc. It has been widely studied in the field of electrospinning, and the electrospinning technology of polyvinyl alcohol has been relatively mature. Using its oil resistance and solvent resistance, the polyvinyl alcohol nanofiber membrane can effectively filter oily particles in the air without worrying abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D01F8/10D01D5/00D06C7/00B01D39/16B01D46/54
CPCD04H1/4382D04H1/728D01F8/10D01D5/003D01D5/0092D06C7/00B01D46/543B01D39/1623
Inventor 戴伟民段晓博王春蕾潘信陆亚明
Owner スンナテクノロジーズシャンハイカンパニーリミテッド
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