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Super-hydrophilic and underwater super-oleophobic oil-water separation mesh film and preparation method thereof

An oil-water separation omentum and underwater super-oleophobic technology, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of poor water resistance of the omentum, achieve large water flux, low energy consumption, and membrane The effect of slow flux decay

Inactive Publication Date: 2014-07-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the film-forming substances used in these two patents are completely water-soluble polymers, resulting in poor water resistance of the omentum.

Method used

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  • Super-hydrophilic and underwater super-oleophobic oil-water separation mesh film and preparation method thereof
  • Super-hydrophilic and underwater super-oleophobic oil-water separation mesh film and preparation method thereof
  • Super-hydrophilic and underwater super-oleophobic oil-water separation mesh film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put a piece of 15×15mm 2 The 300-mesh stainless steel wire mesh was immersed in distilled water, ethanol or acetone, and distilled water in order, respectively, and ultrasonically cleaned at 150W and 40KHz for 8min, and hung up to dry at room temperature;

[0034] (2) Preparation of seed emulsion, in a 250ml four-necked flask, add 100g deionized water and 0.0252g SDBS, stir and gradually heat up to 90°C, then add 0.4g sodium persulfate, 0.45g acrylic acid and 4.4g styrene Add the mixture at one time, stir evenly, keep warm after 1 hour of reaction;

[0035] (3) For the preparation of nuclear latex particles, add 120 g of deionized water, 122 g of styrene, and 6 g of dodecanethiol into a 1000 ml four-neck flask, stir and heat to 85 ° C, and slowly add the above seed emulsion within 1 hour;

[0036] (4) Preparation of core-shell latex particles. In the solution containing the above-mentioned core latex particles, add 120g of deionized water and 1.056g of sodium persulf...

Embodiment 2

[0044] (1) Put a piece of 15×15mm 2 The 100-mesh copper wire mesh was immersed in distilled water, ethanol, and distilled water in order, respectively, cleaned at 100W and 20KHz for 10min, and hung up to dry at room temperature;

[0045] (2) Preparation of seed emulsion, in a 250ml four-necked flask, add 50g deionized water and 0.0126g SDBS, mix and stir and gradually heat up to 85°C, then add 0.2g sodium persulfate, 0.225g methacrylic acid and 2.2g benzene The mixture composed of ethylene is added at one time, stirred evenly, and kept warm after reacting for 1 hour;

[0046] (3) For the preparation of nuclear latex particles, add 100g of deionized water, 100g of styrene, and 3g of mercaptoethanol into a 1000ml four-neck flask, stir and heat to 85°C, and slowly add the above seed emulsion within 1h;

[0047] (4) Preparation of core-shell latex particles. In the solution containing the above-mentioned core latex particles, add 100g deionized water and 0.8g sodium persulfate mi...

Embodiment 3

[0055] (1) Put a piece of 15×15mm 2 The 200-mesh aluminum wire mesh was immersed in distilled water, ethanol or acetone, and distilled water in order, respectively, and ultrasonically cleaned at 150W and 40KHz for 10min, and hung up to dry at room temperature;

[0056] (2) Preparation of seed emulsion, in a 250ml four-necked flask, add 100g deionized water and 0.0252g SDBS, mix and stir and gradually heat up to 90°C, then add 0.4 sodium persulfate, 0.45g acrylic acid and 4.4g styrene Add the mixture at one time, stir evenly, keep warm after 1 hour of reaction;

[0057] (3) For the preparation of nuclear latex particles, add 120 g of deionized water, 122 g of styrene, and 6 g of dodecanethiol into a 1000 ml four-neck flask, stir and heat to 85 ° C, and slowly add the above seed emulsion within 1 hour;

[0058] (4) Preparation of core-shell latex particles. In the solution containing the above-mentioned core latex particles, add 120g of deionized water and 1.056g of sodium pers...

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Abstract

The invention discloses a super-hydrophilic and underwater super-oleophobic oil-water separation mesh film and a preparation method thereof. The method comprises the following steps: ultrasonically cleaning a fabric silk screen and airing at normal temperature; preparing polymer emulsion particle microspheres of which the particle size distribution is 100-500nm and the surface is rich in carboxyl salt by adopting an emulsion polymerization, and preparing nano-silica sol by adopting a sol-gel method; preparing hydrophilic emulsion particles and the nano sol into a mixed solution and performing uniformly ultrasonic dispersion; immersing the silk screen into the mixed solution, vertically lifting up, or directly spraying by adopting a high-pressure spray gun, and drying to obtain the super-hydrophilic and underwater super-oleophobic oil-water separation mesh film. The surface of the oil-water separation mesh film has a spherical rough micro-nano binary structure, contact angles with water and oil in air are 0 degree, and the oil-water separation mesh film has the super hydrophilicity. A contact angle with oil drops under water is larger than 150 degrees, and the oil-water separation mesh film has low adhesion properties on the oil drops. The mesh film can be applied to separating oil water mixtures and treating oily sewage.

Description

technical field [0001] The present invention relates to a new type of functional environmental protection coating, in particular to a polymer latex microsphere with carboxyl salt-rich surface and an oil-water separation omentum with super-amphiphilic in the air and super-oleophobic properties under water and its preparation method and The invention belongs to the technical field of organic-inorganic hybrid nano functional materials. Background technique [0002] The superhydrophilic and superoleophobic coating film has the properties of superhydrophilic in the air and superhydrophilic and superoleophobic in water. When oily wastewater contacts the surface of the membrane, the membrane surface reassembles from superhydrophobic to superhydrophilic under the stimulation of water. In this way, water can permeate downward continuously only under the action of gravity and capillary force, while the surface always maintains superoleophobicity, oil stays on the surface to achieve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022
Inventor 涂伟萍袁腾陈卓周显宏王锋
Owner SOUTH CHINA UNIV OF TECH
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