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Filter screen capable of realizing efficient oil-water separation, and method for preparing filter screen by femtosecond laser

An oil-water separation, femtosecond laser technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of high filter screen cost, low use efficiency, complex processing technology process, etc. Stable structure, simple and efficient processing method

Inactive Publication Date: 2016-06-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high cost, low use efficiency and complex processing technology in the existing filter screen

Method used

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  • Filter screen capable of realizing efficient oil-water separation, and method for preparing filter screen by femtosecond laser
  • Filter screen capable of realizing efficient oil-water separation, and method for preparing filter screen by femtosecond laser
  • Filter screen capable of realizing efficient oil-water separation, and method for preparing filter screen by femtosecond laser

Examples

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Effect test

Embodiment 1

[0029] An oil-water separation filter screen prepared on a titanium foil material with a thickness of 100um, as attached figure 2 As shown, the titanium foil is evenly distributed with an array of micro-through holes, the pore diameter of the micro-holes is about 60um, and the distance between adjacent micro-holes is 200um, and a circle of recasting layer will be formed on the edge of the micro-holes to increase the size of the filter screen. Surface roughness improves the hydrophilicity and underwater oleophobicity of the filter screen. Good superhydrophilic and underwater superoleophobic properties can ensure that the filter screen can separate the aqueous solution from the oil-water mixture only under the action of gravity, realize oil-water separation, and have excellent oil-water separation efficiency.

[0030] The oil-water separation filter screen in this embodiment is obtained by femtosecond laser processing, and the processing process includes the following steps:

...

Embodiment 2

[0038]An oil-water separation filter prepared on a cover glass material with a thickness of about 80um. The cover glass is evenly distributed with an array of micro-through holes. The spacing of the micropores is 100um, and some micron-sized and nano-sized particles are scattered on the edge of the micropores, which effectively increases the surface roughness of the filter screen and improves the hydrophilicity and underwater oleophobicity of the filter screen surface. Good superhydrophilic and underwater superoleophobic properties can ensure that the filter screen can separate the aqueous solution from the oil-water mixture only under the action of gravity, realize oil-water separation, and have excellent oil-water separation efficiency.

[0039] The oil-water separation filter screen in this embodiment is obtained by femtosecond laser processing, and the processing process includes the following steps:

[0040] Step 1: pretreat the selected cover glass material, and ultrason...

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Abstract

The invention relates to a filter screen capable of realizing efficient oil-water separation, and a method for preparing the filter screen by femtosecond laser, belonging to the field of function materials. The method concretely comprises the following steps: putting a hydrophilic thin-film material having the thickness within the range of 50-100 microns onto a movable translation platform, enabling the femtosecond laser to be focused onto a material surface through a plano-convex lens, and controlling the parameters such as energy, pulse number and the like of the femtosecond laser; processing a micro through hole array in the thin-film material, wherein the aperture range of the micro through hole array is 40-70 microns, and controlling the distances among the micro holes to be within the range of 100-300 microns by the movable translation platform; completing the processing to obtain the filter screen capable of realizing efficient oil-water separation. The oil-water separation filter screen provided by the invention is wide in material source, low in price as well as simple and efficient in the preparation technology; the prepared filter screen has a good oil-water separation effect for different oil-water mixed liquids, the oil-water separation efficiency reaches up to 99%, and the processed filter screen has good stability and can be repeatedly used for more than 50 times.

Description

technical field [0001] The invention relates to a filter screen capable of realizing high-efficiency oil-water separation and a femtosecond laser preparation method thereof, belonging to the field of functional materials. Background technique [0002] Due to the increasingly serious problems of offshore oil pollution and industrial sewage discharge, finding a fast and effective oil-water separation method has become an urgent problem to be solved in the process of modern industrial development. Traditional oil-water separation methods include the use of gravity, centrifugal force, flotation, filtration, electrochemical, etc. to treat the oil-water mixture, and use the density difference between oil and water to separate the oil layer from the water layer to achieve oil-water separation. However, these methods separate A part of the oil will still remain in the aqueous solution, and the oil-water separation efficiency is not high. Recent studies have shown that if the surfac...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 曹强姜澜叶森
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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