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Oil-water separation material as well as preparation method and application thereof

A technology for oil-water separation and modified materials, which is applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of difficult separation of gray water in wastewater, and achieve high oil-water separation efficiency, simple preparation, and no explosion hazard.

Active Publication Date: 2017-09-19
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention finds that fly ash is a potential multi-level structural layer assembly particle, and uses fly ash as a surface assembly particle to develop a super-hydrophobic material for oil-water separation, which can not only realize the high-value utilization of fly ash solid waste , and can meet the needs of oil-polluted wastewater for high-efficiency oil-water separation materials, and solve the problem that gray water is difficult to separate when fly ash treats wastewater
[0009] The invention utilizes the special structure of fly ash to solve the problem of fastness between the superhydrophobic coating and the substrate through the bionic mussel silk protein bioadhesion, and prepares a kind of oil-water separation efficiency, fast separation speed, repeatability Superior usability and biodegradable superhydrophobic superoleophilic oil-water separation material

Method used

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  • Oil-water separation material as well as preparation method and application thereof
  • Oil-water separation material as well as preparation method and application thereof
  • Oil-water separation material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 0.15g of dopamine hydrochloride and 1.2g of trishydroxymethylaminomethane hydrochloride in 95.2mL of distilled water, then disperse 0.2g of fly ash (about 200nm in particle size) in the above solution, at 1500 rpm After stirring for 15 min a suspension was obtained. Then, add cotton fabric into the suspension, stir and react at 20°C for 24h, wash until neutral, and dry. Finally, the fly ash-loaded cotton fabric was placed in an ethanol solution (0.5 wt %) dissolved in dodecyltrimethoxysilane, soaked at room temperature for 2 hours, and the product was dried to obtain a fly ash-modified cotton fabric material. The oil separation efficiencies of the product in this example to n-hexane / water, toluene / water and chloroform / water mixtures (the volume ratio of oil and water is 1:3) can reach 95.5%, 96.2% and 97.5%, respectively.

Embodiment 2

[0066] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 1.6g of dopamine hydrochloride and 0.2g of trishydrochloride in 95.2mL of distilled water, then disperse 1.5g of fly ash (about 200nm in particle size) in the above solution, at 1500 rpm After stirring for 15 min a suspension was obtained. Then, add cotton fabric into the suspension, stir and react at 20°C for 24h, wash until neutral, and dry. Finally, the fly ash-loaded cotton fabric was placed in an ethanol solution (0.15 wt %) dissolved in dodecyltrimethoxysilane, soaked at room temperature for 2 hours, and the product was dried to obtain a fly ash-modified cotton fabric material. The oil separation efficiencies of the product in this example to n-hexane / water, toluene / water and chloroform / water mixtures (the volume ratio of oil and water is 1:2) can reach 96.5%, 95.8% and 97%, respectively.

Embodiment 3

[0068] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 1.6g of dopamine hydrochloride and 1.2g of trishydroxymethylaminomethane hydrochloride in 95.2mL of distilled water, then disperse 2g of fly ash (about 200nm in particle size) in the above solution, and stir at 1500 rpm After 15 min a suspension was obtained. Then, add cotton fabric into the suspension, stir and react at 35°C for 24h, wash until neutral, and dry. Finally, the fly ash-loaded cotton fabric was placed in an ethanol solution (0.5 wt %) dissolved in dodecyltrimethoxysilane, soaked at room temperature for 2 hours, and the product was dried to obtain a fly ash-modified cotton fabric material. The oil separation efficiencies of the product in this example to n-hexane / water, toluene / water and chloroform / water mixtures (the volume ratio of oil and water is 1:2) can reach 97.5%, 98% and 98.4%, respectively.

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Abstract

The invention discloses a preparation method of a fly ash modification material with an oil-water separation function. The preparation method is characterized in that solid waste fly ash is used as a surface modification material and imitates a biological adhesion effect and a lotus leaf effect of marine mussel foot silk protein; the oil-water separation material with a special wetting property is prepared through dopamine self-polymerization, fly ash adhesion and hydrophobic modification. The separation efficiency of the oil-water separation material prepared by the preparation method on various oil / water mixtures can reach 95 percent or above. The preparation method has the advantages that raw materials of a technology are cheap and easy to obtain, a process is simple and easy to operate and the preparation is carried out at room temperature; a product has a good oil-water separation function, tolerance and recyclability and can be applied in the fields including water-surface oil pollution, chemical engineering, food production and the like.

Description

technical field [0001] The invention relates to an oil-water separation material and a preparation method thereof, especially a method for modifying the surface of the material with fly ash to make it superhydrophobic, and a method and application for treating oily waste water with the oil-water separation material. Background technique [0002] With the continuous development of industry, the protection of the environment and ecological balance has become a topic of increasing concern. Oily wastewater has a wide range of sources. A large amount of oily wastewater will be produced in petroleum production, petroleum storage and transportation, oil refining, chemical industry, catering, machinery manufacturing, food processing and other industries, which will seriously endanger the ecological balance and human health. Therefore, the efficient use of oily wastewater Processing has become a hot spot of concern. The traditional oily wastewater treatment process has disadvantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30B01D17/022C02F1/40
CPCB01D17/0202B01J20/10C02F1/40
Inventor 王锦涛韩凤兰
Owner BEIFANG UNIV OF NATITIES
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