阅读说明：本技术 一种蜡固封四周的油水分离过滤膜及其制备方法 (Oil-water separation filtering membrane with periphery sealed by wax and preparation method thereof ) 是由 曾晓钿 柯尊文 王成勇 袁志山 于 2020-04-17 设计创作，主要内容包括：本发明公开了一种蜡固封四周的油水分离过滤膜及其制备方法,所述蜡固封四周的油水分离过滤膜,包括亲水无纺布和用于固封所述亲水无纺布四周的蜡。本发明还提供该油水分离过滤膜的制备方法,所述制备方法包括如下步骤：S1.提供亲水无纺布和用于打印蜡型的本体蜡；S2.建立蜡型的三维实体模型；S3.利用蜡型3D打印机按照步骤S2的三维实体模型将本体蜡打印在亲水无纺布上。本发明利用蜡固封亲水无纺布四周,防止水从亲水无纺布四周渗漏,有效提高油水分离速率；而且,价格便宜,具有较高的市场价值。(The invention discloses an oil-water separation filtering membrane with a wax-sealed periphery and a preparation method thereof. The invention also provides a preparation method of the oil-water separation filtering membrane, which comprises the following steps: s1, providing a hydrophilic non-woven fabric and body wax for printing a wax pattern; s2, establishing a three-dimensional entity model of the wax pattern; and S3, printing the body wax on the hydrophilic non-woven fabric by using a wax pattern 3D printer according to the three-dimensional solid model in the step S2. The method utilizes the wax to seal the periphery of the hydrophilic non-woven fabric, prevents water from leaking from the periphery of the hydrophilic non-woven fabric, and effectively improves the oil-water separation rate; in addition, the price is low, and the market value is high.)

1. An oil-water separation filtering membrane with the periphery sealed by wax is characterized by comprising hydrophilic non-woven fabric and wax for sealing the periphery of the hydrophilic non-woven fabric.

2. The oil-water separation filtration membrane according to claim 1, wherein the hydrophilic nonwoven fabric has 1 to 20 layers.

3. The oil-water separation filtration membrane according to claim 2, wherein the hydrophilic nonwoven fabric has 1 to 5 layers.

4. The oil-water separation filtration membrane according to claim 1, wherein the hydrophilic nonwoven fabric is produced by a spunlace process, a thermal bonding process, a pulp air-laying process, a wet process, a spunbond process, a melt-blowing process, a needle-punching process, or a stitch-bonding process.

5. The oil-water separation filtration membrane according to claim 1, wherein the wax is one or more of a vegetable wax, a mineral wax, a petroleum wax, or a synthetic wax.

6. The oil and water separation filtration membrane according to claim 1, wherein the wax is paraffin wax extracted from mineral wax and petroleum wax.

7. The filtration membrane according to claim 1, wherein the filtration membrane has a circular or square shape.

8. The oil-water separation filtration membrane of claim 1, wherein the wax is printed onto the hydrophilic nonwoven fabric by a wax-type 3D printer.

9. The method for producing an oil-water separation filtration membrane according to any one of claims 1 to 8, comprising the steps of:

s1, providing a hydrophilic non-woven fabric and body wax for printing a wax pattern;

s2, establishing a three-dimensional entity model of the wax pattern;

and S3, printing the body wax on the hydrophilic non-woven fabric by using a wax pattern 3D printer according to the three-dimensional solid model in the step S2.

10. The manufacturing method according to claim 9, wherein the wax pattern 3D printer is provided with a storage tank;

step S3 is to transfer the bulk wax processed into a molten state to a storage tank, and print the bulk wax on the hydrophilic non-woven fabric by the wax-type 3D printer according to the three-dimensional solid model of step S2.

Technical Field

The invention relates to the technical field of liquid separation, in particular to an oil-water separation filtering membrane with a wax solid seal periphery and a preparation method thereof.

Background

In recent years, pollution caused by leakage of crude oil at sea and discharge of industrial oily sewage threatens ecosystem homeostasis and affects human health. It is increasingly important to purify water resources polluted by oil, collect crude oil which can be further utilized, and improve oil spill recovery and oil-water separation. Therefore, it is urgent to find a high-efficiency, low-cost oil-water separation technique without causing secondary pollution.

The traditional oil-water separation method mainly comprises a gravity settling separation method, a centrifugal separation method, an adsorption separation method, a distillation separation method, an electric desorption separation method, biodegradation and the like, but the separation methods have high energy consumption, high cost and low efficiency, and can not realize the high-efficiency recovery of crude oil. Compared with the oil-water mixed liquid treatment method, the filtering membrane with special wettability can better separate the oil phase and the water phase in the oil-water mixture, and the method has more manufacturing methods and higher efficiency.

The hydrophilic non-woven fabric has extremely strong water absorption, and water molecules can be rapidly absorbed into the micro/nano structure of the non-woven fabric, so that the water molecules can pass through the micro/nano structure, oil can be prevented from passing through the micro/nano structure, and the super-oleophobic wetting non-woven fabric is formed. However, when the hydrophilic nonwoven fabric is used for an oil-water separation filtration membrane, the oil-water separation rate still needs to be improved.

Therefore, it is required to develop a hydrophilic nonwoven fabric-based oil-water separation filtration membrane having a higher liquid-chemical separation rate.

Disclosure of Invention

In order to overcome the defect that the oil-water separation rate of the hydrophilic non-woven fabric in the prior art needs to be improved, the invention provides the oil-water separation filtering membrane with the periphery sealed by the wax, the provided oil-water separation filtering membrane utilizes the wax to seal the periphery of the hydrophilic non-woven fabric, prevents water from leaking from the periphery of the hydrophilic non-woven fabric, effectively improves the oil-water separation rate, is low in price and has higher market value.

Another object of the present invention is to provide a method for producing the oil-water separation filtration membrane.

In order to solve the technical problems, the invention adopts the technical scheme that:

an oil-water separation filtering membrane with the periphery sealed by wax comprises hydrophilic non-woven fabric and wax for sealing the periphery of the hydrophilic non-woven fabric.

The inventors have found that the reason why the hydrophilic nonwoven fabric has an insufficient oil-water separation rate is that the hydrophilic nonwoven fabric is composed of oriented or random fibers, and water permeates from the periphery to decrease the oil-water separation rate.

The invention utilizes wax to seal the periphery of the hydrophilic non-woven fabric, thereby preventing water from leaking from the periphery of the hydrophilic non-woven fabric and effectively improving the oil-water separation rate. Moreover, the hydrophilic non-woven fabric has the characteristics of easy decomposition, no toxicity, no irritation, low price, recycling and the like, the price of the wax is not high, and the oil-water separation filtering membrane is low in price and has higher market value.

Preferably, the hydrophilic non-woven fabric comprises 1-20 layers.

More preferably, the hydrophilic non-woven fabric comprises 1-5 layers.

Preferably, the hydrophilic nonwoven fabric is prepared by a spunlace process, a thermal bonding process, an air-laid pulp process, a wet process, a spunbond process, a melt-blown process, a needle-punching process or a stitch-bonding process.

Preferably, the wax is one or more of vegetable wax, mineral wax, petroleum wax or synthetic wax.

Preferably, the wax is a paraffin wax extracted from mineral and petroleum waxes.

Preferably, the oil-water separation filter membrane is circular or square.

Preferably, the wax is printed onto the hydrophilic non-woven fabric by a wax pattern 3D printer.

The invention also provides a preparation method of the oil-water separation filtering membrane, which comprises the following steps:

s1, providing a hydrophilic non-woven fabric and body wax for printing a wax pattern;

s2, establishing a three-dimensional entity model of the wax pattern;

and S3, printing the body wax on the hydrophilic non-woven fabric by using a wax pattern 3D printer according to the three-dimensional solid model in the step S2.

Preferably, the wax pattern 3D printer is provided with a storage tank;

step S3 is to transfer the bulk wax processed into a molten state to a storage tank, and print the bulk wax on the hydrophilic non-woven fabric by the wax-type 3D printer according to the three-dimensional solid model of step S2.

Compared with the prior art, the invention has the beneficial effects that:

the method utilizes the wax to seal the periphery of the hydrophilic non-woven fabric, prevents water from leaking from the periphery of the hydrophilic non-woven fabric, and effectively improves the oil-water separation rate; in addition, the price is low, and the market value is high.

Drawings

FIG. 1 is a schematic flow chart of a preparation method of an oil-water separation filtering membrane around a wax solid seal.

Fig. 2 is a schematic view of the hydrophilic nonwoven fabric of step S1 in example 1 of the present invention.

Fig. 3 is a schematic view of the bulk wax of step S1 in example 1 of the present invention.

Fig. 4 is a schematic diagram of the three-dimensional solid model in step S2 in embodiment 1 of the present invention.

Fig. 5 is a schematic diagram presented in step S3 in embodiment 1 of the present invention.

FIG. 6 is a schematic view of the filtration membrane for oil-water separation obtained after completion of step S3 in example 1 of the present invention.

FIG. 7 is a schematic view of an oil-water separator in the oil-water separation test according to the present invention.

In the figure, 1-position hydrophilic non-woven fabric, 2, 3, 4, 5, 6 and 7 are three-dimensional solid models, body wax, printer workbench, printer nozzle and oil-water separation filtering membrane respectively.

In fig. 7, 8 is a syringe; 9 is a gasket; and 10 is a sample, namely a separation membrane to be tested. The left side in FIG. 7 is a real object diagram of the oil-water separation device; the right side is a schematic view, and the needle cylinder, the gasket, the sample and the gasket are arranged from top to bottom in sequence.

Detailed Description

The present invention will be further described with reference to the following embodiments.