Superhydrophilic-superoleophobic particle for oily sewage treatment as well as preparation method and application thereof
A hydrophilic, oleophobic and super-hydrophilic technology, applied in separation methods, chemical instruments and methods, grease/oily substances/floating matter removal devices, etc. Low problems, to achieve stable super-hydrophilic and super-oleophobic, efficient treatment, high separation efficiency
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[0043] A preparation method for superhydrophilic-superoleophobic particles for oily sewage treatment, comprising the following steps:
[0044] (1) Granular core material pretreatment: the granular core material is sieved, washed and dried for later use;
[0045] (2) Preparation of superhydrophilic-superoleophobic dispersion: dissolve perfluorocarboxylic acid in a solvent, then add film-forming aids, then add alkali, and complete the reaction to obtain superhydrophilic-superoleophobic dispersion; The molar ratio of the carboxyl group in the fluorocarboxylic acid to the hydroxyl group in the base is (1-2):1; the solvent includes ethanol or acetone, and the base includes sodium hydroxide, iron hydroxide or calcium hydroxide.
[0046] (3) Add the superhydrophilic-superoleophobic dispersion liquid into the dried particle core material, add micron-sized particle material and nano-sized particle material in turn, stir until completely dispersed, and then dry to obtain the super Hydr...
Embodiment 1
[0052] Dissolve 0.98g of perfluorononanoic acid in 20mL of acetone, add 0.04g of NaOH solid, stir until completely dissolved, then add 0.05g of propylene glycol, and stir magnetically at 1000r / min for 5min to obtain a superhydrophilic-superoleophobic dispersion liquid.
[0053] Take 200g of stainless steel sieved, cleaned and dried quartz sand and pour it into a stirring pot, then pour the superhydrophilic-superoleophobic dispersion into the quartz sand, stir, and at the same time add 3g of silicon with a particle size of 5-50μm Ash and 1.5g of SiO with a particle size of 10-50nm 2 , Stir for 5 minutes until completely dispersed. Put the stirred sample into a vacuum drying oven, and dry it at 55°C for 24 hours to obtain a superhydrophilic-superoleophobic quartz sand filter material.
Embodiment 2
[0055] Dissolve 0.92g of perfluorooctanoic acid in 20mL of absolute ethanol, and add 0.049g of Cu(OH) 2 , stirred until completely dissolved, then added 0.02g of polyvinylpyrrolidone, and stirred magnetically at 1000r / min for 5min to obtain a superhydrophilic-superoleophobic dispersion. Take 150g of stainless steel sieved, cleaned and dried river sand and pour it into a mixing pot, then pour the superhydrophilic-superoleophobic dispersion into the river sand, stir, and at the same time add 3g of powder with a particle size of 5-50μm Coal ash and 1.2g of TiO with a particle size of 10-50nm 2 , Stir for 5 minutes until completely dispersed. Put the stirred sample into a vacuum drying oven, and dry it at 55°C for 24 hours to obtain a superhydrophilic-superoleophobic river sand filter material.
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