A method for accelerating the adsorption and separation of oil-soluble substances by magnetic janus emulsion
An oil-soluble substance and magnetic technology, applied in the chemical field, can solve the problems of low adsorption efficiency, long adsorption time, and difficult to degrade, and achieve the effects of low cost, simple operation and equipment, and great application value
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Embodiment 1
[0043] 10mg Fe 2 O 3 was added to 1 mL of ethoxylated trimethylolpropane triacrylate, and ultrasonicated for 30 min to make Fe 2 O 3 Evenly dispersed. Weigh out 0.112g of ethoxylated trimethylolpropane triacrylate, 0.558g of 2-(perfluorooctyl)ethyl methacrylate, 0.33g of 0.4% F127 (aq) Mixing and vortexing for 3 min, the magnetic Janus emulsion was prepared. Microscopic pictures of magnetic Janus emulsions in disordered state, arrangement under the action of a magnetic field and rotation under the action of a magnetic field were taken. Validation: from figure 2 It can be seen that the magnetic Janus droplets in the disordered state can undergo group inversion and continuous rotation under the action of the magnetic field.
Embodiment 2
[0046] at 100g F127 (aq) Add 0.1 g of methyl red to the mixture, ultrasonicate for 10 min to dissolve and reach saturation, centrifuge at 10,000 rpm for 3 min, repeat 3 times, and take out the upper saturated methyl red surfactant aqueous solution. 25mg Fe 2 O 3 Add to 5mL of ethoxylated trimethylolpropane triacrylate, ultrasonicate for 30min to make Fe 2 O 3 Evenly dispersed. Weigh out 0.33g of ethoxylated trimethylolpropane triacrylate, 0.33g of 2-(perfluorooctyl)ethyl methacrylate, 0.33g of 0.4% F127 (aq) Mixing and vortexing for 3 min, the magnetic Janus emulsion was prepared. 4 g of methyl red aqueous surfactant solution was taken out and placed in a container, 0.1 g of magnetic Janus emulsion was added, and the methods of non-magnetic field and magnetic stirring were adopted respectively. After 24 h, digital photos of the samples were taken, and the lower layer of magnetic Janus emulsion was taken out to take microscope photos.
[0047] Validation: from image 3 ...
Embodiment 3
[0050] 0.4wt% F127 in 100g (aq) Add 0.1 g of methyl red to it, ultrasonicate for 10 min to dissolve and reach saturation, centrifuge at 10,000 rpm for 3 min, repeat 3 times, take out the upper saturated methyl red surfactant aqueous solution, and measure its ultraviolet absorption spectrum. With 0.4wt% F127 (aq) Dilute the saturated solution and measure its UV absorption spectrum.
[0051] Validation: from Image 6 It can be seen that there is a good linear relationship between the absorbance and the concentration of the methyl red surfactant aqueous solution, and the UV standard curve of the methyl red surfactant aqueous solution is A=0.02502+0.76762c. where c is the relative concentration of methyl red, and A is the absorbance of the corresponding solution.
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