Magnetic polystyrene foam and preparation method and application thereof
A polystyrene foam, magnetic technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of incompatibility, low recycling efficiency, difficult recycling, etc. Falling off, good adsorption effect, the effect of broadening the scope of application
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[0023] The preparation method of a magnetic polystyrene foam of the present invention, the specific preparation process is as follows figure 1 , Including the following steps:
[0024] Step 1. Add 10-15 mL of Fe coated with hollow oleic acid with a mass concentration of 2.5 mg / mL 3 O 4 Deionized water solution, sonicated at 25~35℃ for 10~20min to form Fe 3 O 4 Dispersions;
[0025] Step 2. Add the cut clean foam to the Fe obtained in step 1 3 O 4 In the dispersion liquid, ultrasonically stir for 3.5-4.5h at room temperature to obtain magnetic foam;
[0026] Step 3. Add the magnetic foam obtained in step 2 to the SDBS solution, stir ultrasonically for 10-20 minutes, and then transfer it to a three-necked flask, where the mass ratio of SDBS to water is 1:100;
[0027] Step 4. Heat the mixed solution obtained in step 3 in a water bath, increase the heating temperature of the water bath to 65~75℃, add St, DVB and AIBN, so that the mass ratio of AIBN to St to DVB is 1:(6.75~12):( 67.5-120)...
Example Embodiment
[0028] Example 1
[0029] The first step: 10mL of Fe coated with hollow oleic acid with a mass concentration of 2.5mg / mL 3 O 4 Deionized aqueous solution, sonicated at 25°C for 20 minutes to form hollow oleic acid coated Fe 3 O 4 Dispersions;
[0030] In the second step, the clean foam cut into (3cm×1.5cm×1.5cm) is added to the hollow oleic acid-coated Fe obtained in the first step 3 O 4 In the dispersion liquid, ultrasonic stirring for 3.5h at room temperature;
[0031] In the third step, add the magnetic foam obtained in the second step to 50 mL of an aqueous solution dissolving 500 mg of SDBS, stir ultrasonically for 10 minutes, and then transfer it to a three-necked flask;
[0032] In the fourth step, the heating temperature of the water bath in the third step was increased to 65℃, and 3mL of St, 0.3mL of DVB and 30mg of AIBN were added. The reaction time was 5.5h. After the reaction, it was washed with ethanol several times, and the product was heated to 50 Dry at ℃ to obtain mag...
Example Embodiment
[0034] Example 2
[0035] The first step: 12mL of Fe coated with hollow oleic acid with a mass concentration of 2.5mg / mL 3 O 4 Deionized water solution, ultrasonic 15min at 30℃, form hollow oleic acid coated Fe 3 O 4 Dispersions;
[0036] In the second step, the clean foam cut into (3cm×1.5cm×1.5cm) is added to the hollow oleic acid-coated Fe obtained in the first step 3 O 4 In the dispersion, stir ultrasonically for 4 hours at room temperature;
[0037] In the third step, add the magnetic foam obtained in the second step to 55 mL of an aqueous solution dissolving 550 mg of SDBS, stir ultrasonically for 15 minutes, and then transfer it to a three-necked flask;
[0038] In the fourth step, the heating temperature of the water bath in the third step was increased to 70℃, and 3.5 mL of St, 0.35 mL of DVB and 35 mg of AIBN were added. The reaction time was 6 hours. After the reaction, the product was washed with ethanol for several times. Dry at ℃ to obtain magnetic polystyrene foam.
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