Super-hydrophobic loofah sponge for separating oil and water and preparation method thereof
A technology of oil-water separation and loofah, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of complicated preparation process of super-hydrophobic sponge, and achieve good oil-water separation performance, easy availability of raw materials, and excellent mechanical strength. Effect
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[0031] Example 1
[0032] 1) Preparation of hydrophobically modified silica nanoparticles: In parts by mass, after mixing 5 parts of ammonia and 25 parts of absolute ethanol, add 5 parts of ethyl orthosilicate and 25 parts of anhydrous dropwise In the mixed solution of ethanol, heated to 30°C, stirred and reacted for 5 hours; then, 1 part of heptafluorodecyltrimethoxysilane was added to the reaction system, and the reaction was continued for 10 hours; finally, the crude product was washed at 80 Vacuum drying at ℃ for 4 hours to obtain hydrophobically modified silica nanoparticles;
[0033] 2) Preparation of super-hydrophobic loofah: in parts by mass, the silica nanoparticles prepared above were dispersed in 30 parts of ethyl acetate by ultrasonic method, and 10 parts of loofah and 10 parts of 1,6-6 were added. Methylene diisocyanate and 0.1 part of dibutyltin dilaurate were reacted at 70°C for 5 hours; then, the loofah was taken out and washed with 40 parts of ethyl acetate for 3 ...
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[0039] Example 2
[0040] 1) Preparation of hydrophobically modified silica nanoparticles: In parts by mass, after mixing 0.5 parts of ammonia and 10 parts of absolute ethanol, add dropwise to 2 parts of ethyl orthosilicate and 10 parts of anhydrous In the mixed solution of ethanol, heated to 60°C, stirred and reacted for 0.5 hours; then, 0.5 parts of heptafluorodecyltrimethoxysilane was added to the reaction system, and the reaction was continued for 1 hour; finally, the crude product was washed at 30 Vacuum drying at ℃ for 24 hours to obtain hydrophobically modified silica nanoparticles;
[0041] 2) Preparation of super-hydrophobic loofah: in parts by mass, disperse the above-prepared silica nanoparticles into 20 parts of ethyl acetate by ultrasonic method, add 10 parts of loofah and 5 parts of 1,6-6 Methylene diisocyanate and 0.05 parts of dibutyltin dilaurate were reacted at 50°C for 12 hours; then, the loofah was taken out and washed with 30 parts of ethyl acetate for 3 times...
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[0043] Example 3
[0044] 1) Preparation of hydrophobically modified silica nanoparticles: in parts by mass, 4 parts of ammonia and 25 parts of methanol are mixed uniformly, and then added dropwise to a mixed solution of 4 parts of ethyl orthosilicate and 25 parts of methanol Then, add 0.7 parts of tridecafluorooctyltrimethoxysilane to the reaction system and continue the reaction for 6 hours; finally, the crude product is washed and dried at 50°C under vacuum After 12 hours, hydrophobically modified silica nanoparticles were obtained;
[0045] 2) Preparation of superhydrophobic loofah: in parts by mass, disperse the above-prepared silica nanoparticles in 30 parts of butyl acetate by ultrasonic method, add 10 parts of loofah and 6 parts of diphenylmethane- 4,4′-diisocyanate and 0.1 parts of catalyst were reacted at 60°C for 7 hours; then, the loofah was taken out and washed twice with 30 parts of butyl acetate; finally, the loofah was dried at 60°C for 12 hours, that is Get super...
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