A kind of oil-water separation material and its preparation method and application
A technology for oil-water separation and modification of 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 the effects of no explosion hazard, easy control, and simple preparation.
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Embodiment 1
[0063] 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
[0065] 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
[0067] 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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