阅读说明：本技术 一种高效油水分离滤膜及其制备方法 (Efficient oil-water separation filter membrane and preparation method thereof ) 是由 齐欢 张初阳 彭钒 王�义 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种高效油水分离滤膜及其制备方法,所述油水分离滤膜由依次设置的面层、芯层和底层复合而成,面层材料和底层材料均为疏水材料,芯层材料为亲水材料。本发明的油水分离滤膜为三层复合结构,材料面层为疏水层,在接触水时可使其以水珠的状态存在,并快速将水传导至织物的芯层,并在芯层快速润湿散开,材料底层为疏水层可以起到二次分离效果。本发明提高了传统油水分离滤膜的分离效率,降低了滤膜的生产成本。(The invention discloses a high-efficiency oil-water separation filter membrane and a preparation method thereof. The oil-water separation filter membrane is of a three-layer composite structure, the surface layer of the material is a hydrophobic layer, the hydrophobic layer can exist in a water droplet state when contacting water, water is quickly conducted to the core layer of the fabric and quickly wetted and dispersed in the core layer, and the bottom layer of the material is the hydrophobic layer and can achieve a secondary separation effect. The invention improves the separation efficiency of the traditional oil-water separation filter membrane and reduces the production cost of the filter membrane.)

1. A high-efficient oil-water separation filter membrane which characterized in that: the oil-water separation filter membrane is formed by compounding a surface layer, a core layer and a bottom layer which are sequentially arranged, wherein the surface layer material and the bottom layer material are both hydrophobic materials, and the core layer material is a hydrophilic material.

2. The high efficiency oil-water separation membrane of claim 1, wherein: the surface layer material is a conventional hydrophobic non-woven material or a hydrophobic material finished by a hydrophobic finishing agent.

3. The method for preparing a high efficiency filter membrane for oil-water separation as claimed in claim 2, wherein: the conventional hydrophobic non-woven material is a polypropylene composite material, a polyester composite material, a hydrophobic ES composite material or an SMS composite material, and the hydrophobic finishing agent is a fluorine-containing resin, a quaternary ammonium salt containing long aliphatic hydrocarbon chains or a polysiloxane.

4. The method for preparing a high efficiency filter membrane for oil-water separation as claimed in claim 1, wherein: the core layer material is a non-woven material with good hydrophilic water absorption.

5. The method for preparing a high efficiency filter membrane for oil-water separation as claimed in claim 4, wherein: the non-woven material with good hydrophilic water absorption is cotton, viscose or hydrophilic ES.

6. The method for preparing a high efficiency filter membrane for oil-water separation as claimed in claim 1, wherein: the bottom layer material is a conventional hydrophobic non-woven material or a hydrophilic material finished by a hydrophobic finishing agent.

7. The method for preparing a high efficiency filter membrane for oil-water separation as claimed in claim 6, wherein: the conventional hydrophobic non-woven material is polypropylene, polyester or hydrophobic ES, the hydrophobic finishing agent is fluorine-containing resin, quaternary ammonium salt or polysiloxane containing long aliphatic hydrocarbon chains, and the hydrophilic material is cotton, viscose or hydrophilic ES.

8. The method for preparing a high efficiency filter membrane for oil-water separation as claimed in claim 1, wherein: the gram weight range of the surface layer material is 15-60g/m²The width range of the surface layer material is 10-120 cm; the gram weight range of the core layer material is 20-60g/m²The width range of the core layer material is 10-120 cm; the gram weight range of the bottom layer material is 15-40g/m²The width range of the bottom layer material is 10-120 cm.

9. The process for preparing a high performance membrane for filtration of oil-water separation according to any one of claims 1 to 8, wherein: and compounding the surface layer, the core layer and the bottom layer by adopting a hot air bonding, ultrasonic bonding or dispensing bonding mode to obtain the oil-water separation filter membrane.

Technical Field

The invention belongs to the technical field of oil-water separation, and particularly relates to a high-efficiency oil-water separation filter membrane and a preparation method thereof.

Background

Oil-water separation is a process of separating oil from water mainly by utilizing the difference of density or chemical properties of oil and water through gravity settling or other physicochemical reactions.

Some enterprises in industrial production adopt a standing layering principle to separate, but the required equipment volume is large; some enterprises use expensive filtration membranes based on nanomembranes or metal meshes to perform filtration. In view of the complex process of the traditional oil-water separation mode, the cost of the filter membrane with the high-efficiency oil-water separation effect is relatively high. Therefore, it is highly desirable to prepare a filtration membrane that can perform high-efficiency oil-water separation, can be reused, has low cost, and can be industrially produced.

Disclosure of Invention

The invention aims to solve the problems of poor separation efficiency, non-reusability, high cost and the like of the current oil-water separation filter membrane, provides a high-efficiency oil-water separation filter membrane and a preparation method thereof,

in order to achieve the purpose, the invention adopts the technical scheme that:

the efficient oil-water separating filter membrane is formed by compounding a surface layer, a core layer and a bottom layer which are sequentially arranged, wherein the surface layer material and the bottom layer material are both hydrophobic materials, and the core layer material is a hydrophilic material.

(1) Selection of surface layer material: conventional hydrophobic nonwovens or hydrophobic materials finished with hydrophobic finishes.

Conventional hydrophobic nonwoven materials include, but are not limited to: polypropylene, polyester, hydrophobic ES or SMS composites and similar bicomponent nonwovens.

Hydrophobic finishing agent: fluorine-containing resins, quaternary ammonium salts containing long aliphatic hydrocarbon chains, or polysiloxanes.

The gram weight range of the surface layer material is 15-60g/m²The width range of the surface layer material is 10-120 cm.

(2) Selection of core layer materials: the non-woven material with good hydrophilic and water-absorbing properties has the functions of water absorption and water retention.

Hydrophilic, highly water absorbent nonwoven materials include, but are not limited to: cotton, viscose or hydrophilic ES and similar bicomponent nonwoven materials.

The gram weight range of the core layer material is 20-60g/m²The width of the core layer material is 10-120cm

(3) Selection of the bottom layer material: conventional hydrophobic nonwoven materials or hydrophilic materials finished with hydrophobic finishing agents.

Conventional hydrophobic nonwoven materials include, but are not limited to: polypropylene, polyester or hydrophobic ES and similar bicomponent nonwovens.

Hydrophobic finishing agent: fluorine-containing resins, quaternary ammonium salts or polysiloxanes containing long aliphatic hydrocarbon chains,

hydrophilic materials include, but are not limited to: cotton, viscose or hydrophilic ES and similar bicomponent nonwoven materials.

The gram weight range of the bottom layer material is 15-40g/m²The width range of the bottom layer material is 10-120 cm.

(4) The compound mode is as follows: and compounding the surface layer, the core layer and the bottom layer by adopting a hot air bonding, ultrasonic bonding or dispensing bonding mode to obtain the oil-water separation filter membrane.

The invention has the following beneficial effects:

(1) the oil-water separation filter membrane is of a three-layer composite structure, the surface layer of the material is a hydrophobic layer, the hydrophobic layer can exist in a water droplet state when contacting water, quickly conducts the water to the core layer of the fabric, and quickly wets and scatters in the core layer; the bottom layer of the material is a hydrophobic layer, so that a secondary separation effect can be achieved.

(2) The oil-water separation filter membrane has the characteristics of super-hydrophilicity and super-oleophobic property under water, has extremely low adhesion to oil drops under water, strong anti-fouling capability, excellent anti-fouling performance to high-viscosity oils, can realize the separation of oil-water layered mixed liquor and oil-water emulsion of various oils, has very high separation efficiency and good use stability, and can be recycled for multiple times.

(3) The invention prepares the high-efficiency oil-water separation filter membrane by a simple method, and the raw materials are common materials on the market, so the cost is low and the filter membrane is easy to obtain. The whole production process adopts the existing process, is simple, green, environment-friendly and pollution-free, and has good industrial application prospect.

The specific implementation mode is as follows:

the invention is further illustrated by the following examples, but the scope of the invention as claimed is not limited to the scope of the examples

Example 1

A preparation method of a high-efficiency oil-water separation filter membrane comprises the following steps:

(1) selection of surface layer material: 25g/m²The spun-bonded polypropylene non-woven fabric has the width of 40cm, and is impregnated and dried by adopting a fluorine-containing resin solution.

(2) Selection of core layer materials: 35g/m²The width of the viscose non-woven fabric is 40 cm.

(3) Selection of the bottom layer material: 20g/m²The width of the spun-bonded polyester non-woven fabric is 40 cm.

(4) The compound mode is as follows: and compounding the surface layer, the core layer and the bottom layer in an ultrasonic compounding mode.

The oil-water separation efficiency of the obtained oil-water separation filter membrane can reach 95.3 percent.

Example 2

A preparation method of a high-efficiency oil-water separation filter membrane comprises the following steps:

(1) selection of surface layer material: 40g/m²SMS composite nonwoven fabricCloth with width of 90 cm.

(2) Selection of core layer materials: 35g/m²The width of the cotton staple fiber non-woven fabric is 90 cm.

(3) Selection of the bottom layer material: 15g/m²The width of the polypropylene non-woven fabric is 90 cm.

(4) The compound mode is as follows: compounding by hot air adhesion

The oil-water separation efficiency of the obtained oil-water separation filter membrane can reach 98.22 percent

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.