Nanofiber composite filter membrane for water treatment and preparation method of nanofiber composite filter membrane for water treatment

Abstract

The invention discloses a nanofiber composite filter membrane for water treatment. The nanofiber composite filter membrane comprises a nonwoven fabric isolating layer A, a hollow nanofiber membrane and a nonwoven fabric isolating layer B. By combination of the nonwoven isolating layers and the hollow nanofiber membrane and buffering through the isolating layers, high pressure resistance is realized, primary filtration is realized when water flows through the nonwoven fabric isolating layers, and direct harms caused by water quality deterioration to the filter membrane are avoided. By adoptionof a polycarboxylate superplasticizer for graphene modification, graphene modified through the polycarboxylate superplasticizer can be stably and uniformly dispersed in the hollow nanofiber membrane to play a better role in reinforcing and toughening. Due to addition of nanosilver particles in the hollow nanofiber membrane, microorganisms can be killed in water treatment, and the nanosilver composite membrane is excellent in biological pollution resistance. The composite filter membrane has advantages of high hydrophilicity, high chemical resistance and pollution resistance, remarkable selectivity and the like.

Description

technical field

[0001] The invention relates to the technical field of membrane separation materials, in particular to a nanofiber composite filter membrane for water quality treatment and a preparation method thereof. Background technique

[0002] As the preferred technology for water treatment in the 21st century, membrane separation technology has the advantages of low energy consumption, high separation efficiency, simple process, no need to add additives, and no impact on human health compared with conventional water treatment technology. Therefore, it is used in oily wastewater treatment, Fiber industry wastewater treatment, metal electrophoretic painting process wastewater treatment, papermaking wastewater treatment, membrane bioreactor and other fields have been widely used.

[0003] The core of membrane separation technology is the separation membrane material, which is divided into inorganic membrane material and organic polymer membrane material, that is, polymer ...

Examples

Embodiment 1

[0048] Embodiment 1 A kind of preparation method of the nanofiber composite filter membrane that is used for water quality treatment, described preparation method comprises the following steps:

[0049] (1) Preparation of non-woven fabric: take 40wt% polyester fiber, 30wt% polypropylene fiber, 35wt% polyvinyl formal fiber and 15wt% viscose fiber, mix and beat, add water to dilute to 0.005 The fiber concentration of wt% is obtained to obtain a slurry, and the slurry is subjected to electrospinning to obtain a non-woven fabric;

[0050] (2) Preparation of hollow nanofiber membrane: 12 parts of polyacrylonitrile, 3.5 parts of acrylonitrile-butadiene-styrene terpolymer, 1.2 parts of acrylonitrile-vinyl acetate copolymer, and 10 parts of polyvinylpyrrolidone , 1.0 parts of nano-silver particles, 1.5 parts of polycarboxylate superplasticizer modified graphene and 80 parts of dimethylacetamide are mixed, stirred and dissolved at 20°C to form a uniform film-making liquid; water at 25°...

Embodiment 2

[0052] Embodiment 2 A kind of preparation method of the nanofiber composite filter membrane that is used for water quality treatment, described preparation method comprises the following steps:

[0053] (1) Preparation of non-woven fabric: take 40wt% polyester fiber, 30wt% polypropylene fiber, 35wt% polyvinyl formal fiber and 15wt% viscose fiber, mix and beat, add water to dilute to 0.005 The fiber concentration of wt% is obtained to obtain a slurry, and the slurry is subjected to electrospinning to obtain a non-woven fabric;

[0054] (2) Preparation of hollow nanofiber membrane: 12 parts of polyacrylonitrile, 3.5 parts of acrylonitrile-butadiene-styrene terpolymer, 1.2 parts of acrylonitrile-vinyl acetate copolymer, and 10 parts of polyvinylpyrrolidone , 1.0 parts of nano-silver particles and 80 parts of dimethylacetamide are mixed, stirred and dissolved at 20°C to form a uniform film-making solution; water at 25°C is used as the core liquid, and the film-making solution at 2...

Embodiment 3

[0056] Example 3 A method for preparing a nanofiber composite filter membrane for water quality treatment, the preparation method comprising the following steps:

[0057] (1) Preparation of non-woven fabric: take 40wt% polyester fiber, 30wt% polypropylene fiber, 35wt% polyvinyl formal fiber and 15wt% viscose fiber, mix and beat, add water to dilute to 0.005 The fiber concentration of wt% is obtained to obtain a slurry, and the slurry is subjected to electrospinning to obtain a non-woven fabric;

[0058] (2) Preparation of hollow nanofiber membrane: 12 parts of polyacrylonitrile, 3.5 parts of acrylonitrile-butadiene-styrene terpolymer, 1.2 parts of acrylonitrile-vinyl acetate copolymer, and 10 parts of polyvinylpyrrolidone , 1.0 parts of nano-silver particles, 1.5 parts of graphene and 80 parts of dimethylacetamide were mixed, stirred and dissolved at 20°C to form a uniform film-making solution; water at 25°C was used as the core liquid, and the film-making solution at 20°C It...

technical field

[0001] The invention relates to the technical field of membrane separation materials, in particular to a nanofiber composite filter membrane for water quality treatment and a preparation method thereof. Background technique

[0002] As the preferred technology for water treatment in the 21st century, membrane separation technology has the advantages of low energy consumption, high separation efficiency, simple process, no need to add additives, and no impact on human health compared with conventional water treatment technology. Therefore, it is used in oily wastewater treatment, Fiber industry wastewater treatment, metal electrophoretic painting process wastewater treatment, papermaking wastewater treatment, membrane bioreactor and other fields have been widely used.

[0003] The core of membrane separation technology is the separation membrane material, which is divided into inorganic membrane material and organic polymer membrane material, that is, polymer ...

Examples

Embodiment 1

[0048] Embodiment 1 A kind of preparation method of the nanofiber composite filter membrane that is used for water quality treatment, described preparation method comprises the following steps:

[0049] (1) Preparation of non-woven fabric: take 40wt% polyester fiber, 30wt% polypropylene fiber, 35wt% polyvinyl formal fiber and 15wt% viscose fiber, mix and beat, add water to dilute to 0.005 The fiber concentration of wt% is obtained to obtain a slurry, and the slurry is subjected to electrospinning to obtain a non-woven fabric;

[0050] (2) Preparation of hollow nanofiber membrane: 12 parts of polyacrylonitrile, 3.5 parts of acrylonitrile-butadiene-styrene terpolymer, 1.2 parts of acrylonitrile-vinyl acetate copolymer, and 10 parts of polyvinylpyrrolidone , 1.0 parts of nano-silver particles, 1.5 parts of polycarboxylate superplasticizer modified graphene and 80 parts of dimethylacetamide are mixed, stirred and dissolved at 20°C to form a uniform film-making liquid; water at 25°...

Embodiment 2

[0052] Embodiment 2 A kind of preparation method of the nanofiber composite filter membrane that is used for water quality treatment, described preparation method comprises the following steps:

[0053] (1) Preparation of non-woven fabric: take 40wt% polyester fiber, 30wt% polypropylene fiber, 35wt% polyvinyl formal fiber and 15wt% viscose fiber, mix and beat, add water to dilute to 0.005 The fiber concentration of wt% is obtained to obtain a slurry, and the slurry is subjected to electrospinning to obtain a non-woven fabric;

[0054] (2) Preparation of hollow nanofiber membrane: 12 parts of polyacrylonitrile, 3.5 parts of acrylonitrile-butadiene-styrene terpolymer, 1.2 parts of acrylonitrile-vinyl acetate copolymer, and 10 parts of polyvinylpyrrolidone , 1.0 parts of nano-silver particles and 80 parts of dimethylacetamide are mixed, stirred and dissolved at 20°C to form a uniform film-making solution; water at 25°C is used as the core liquid, and the film-making solution at 2...

Embodiment 3

[0056] Example 3 A method for preparing a nanofiber composite filter membrane for water quality treatment, the preparation method comprising the following steps:

[0057] (1) Preparation of non-woven fabric: take 40wt% polyester fiber, 30wt% polypropylene fiber, 35wt% polyvinyl formal fiber and 15wt% viscose fiber, mix and beat, add water to dilute to 0.005 The fiber concentration of wt% is obtained to obtain a slurry, and the slurry is subjected to electrospinning to obtain a non-woven fabric;

[0058] (2) Preparation of hollow nanofiber membrane: 12 parts of polyacrylonitrile, 3.5 parts of acrylonitrile-butadiene-styrene terpolymer, 1.2 parts of acrylonitrile-vinyl acetate copolymer, and 10 parts of polyvinylpyrrolidone , 1.0 parts of nano-silver particles, 1.5 parts of graphene and 80 parts of dimethylacetamide were mixed, stirred and dissolved at 20°C to form a uniform film-making solution; water at 25°C was used as the core liquid, and the film-making solution at 20°C It...

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