Oil-water separation material and preparation method and application thereof

Abstract

The invention discloses a preparation method of a silicon dioxide nanoparticle modified material with an oil-water separation function. The preparation method is characterized in that silicon dioxidenanoparticles as a surface modification material simulate the bioadhensive effect and the lotus effect of marine mussel foot proteins, and an oil-water separation material having a special wettabilityis prepared through dopamine self polymerization, silicon dioxide nanoparticle adhesion and oleophobic modification. By means of the prepared oil-water separation material, the separation efficiencyof various oil-water mixtures can reach 95% or above. According to the technology, the raw materials are low in price and easy to obtain, the technology is simple and easy to operate, and the oil-water separation material is prepared at the room temperature, the product is good in oil-water separation function, tolerance and recyclability, and the oil-water separation material can be used in the fields of oil pollution on the water surface, chemical engineering, food production and the like.

Description

technical field

[0001] The invention relates to an oil-water separation material and its preparation method and application, especially a method for modifying the surface of the material with silicon nanoparticles to make it have superoleophobicity, and a method and application for treating oily wastewater by using the oil-water separation material. Background technique

[0002] With the continuous advancement of science and technology, environmental pollution and governance 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, storage and transportation, oil refining, chemical industry, catering, machinery manufacturing, food processing and other industries, which will seriously endanger the ecological environment and human health. Therefore, the efficient treatment of oily wastewater become the focus of people's attention. The traditional oily wastewater treatment ...

Examples

Embodiment 1

[0050] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 0.15g of dopamine hydrochloride and 1.2g of trishydrochloride in 95.2mL of distilled water, and then disperse 0.2g of silica nanoparticles (about 200nm in diameter) in the above solution. After stirring for 15 min, a suspension was obtained. Then, add cotton fabric into the suspension, stir and react at 20° C. for 24 hours, wash until neutral, and dry to obtain a cotton fabric material modified with silica nanoparticles. 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

[0052] 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 silica nanoparticles (about 200nm in diameter) 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 24 hours, wash until neutral, and dry to obtain a cotton fabric material modified with silica nanoparticles. 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

[0054] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 1.6g of dopamine hydrochloride and 1.2g of trishydrochloride in 95.2mL of distilled water, and then disperse 2g of silica nanoparticles (about 200nm in diameter) in the above solution. After stirring for 15 min, a suspension was obtained. Then, cotton fabric was added into the suspension, stirred and reacted at 35°C for 24 hours, washed until neutral, and dried to obtain a cotton fabric material modified with silica nanoparticles. 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.

technical field

[0001] The invention relates to an oil-water separation material and its preparation method and application, especially a method for modifying the surface of the material with silicon nanoparticles to make it have superoleophobicity, and a method and application for treating oily wastewater by using the oil-water separation material. Background technique

[0002] With the continuous advancement of science and technology, environmental pollution and governance 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, storage and transportation, oil refining, chemical industry, catering, machinery manufacturing, food processing and other industries, which will seriously endanger the ecological environment and human health. Therefore, the efficient treatment of oily wastewater become the focus of people's attention. The traditional oily wastewater treatment ...

Examples

Embodiment 1

[0050] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 0.15g of dopamine hydrochloride and 1.2g of trishydrochloride in 95.2mL of distilled water, and then disperse 0.2g of silica nanoparticles (about 200nm in diameter) in the above solution. After stirring for 15 min, a suspension was obtained. Then, add cotton fabric into the suspension, stir and react at 20° C. for 24 hours, wash until neutral, and dry to obtain a cotton fabric material modified with silica nanoparticles. 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

[0052] 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 silica nanoparticles (about 200nm in diameter) 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 24 hours, wash until neutral, and dry to obtain a cotton fabric material modified with silica nanoparticles. 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

[0054] After washing 1.3g of cotton fabric with water, dry it for later use. Dissolve 1.6g of dopamine hydrochloride and 1.2g of trishydrochloride in 95.2mL of distilled water, and then disperse 2g of silica nanoparticles (about 200nm in diameter) in the above solution. After stirring for 15 min, a suspension was obtained. Then, cotton fabric was added into the suspension, stirred and reacted at 35°C for 24 hours, washed until neutral, and dried to obtain a cotton fabric material modified with silica nanoparticles. 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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