Electron Particles, Additives and Filtration Membranes
A technology for filtering membranes and particles, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of difficult uniform dispersion, complicated surface modification process, and difficult to control.
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Embodiment 1
[0040] Preparation of Electron Microparticles
[0041] Add 10g of styrene, 0.4g of sodium styrenesulfonate and 85g of water into a 250ml reaction flask, stir evenly and heat to boiling for about 3mins. Next, 0.0876 g of potassium persulfate was dissolved in 5 g of water, added to the above boiling solution, and stirred continuously for 2 hours. The solution was left to cool to obtain a milky aqueous solution.
[0042] Next, pour 30ml of the emulsion into the dialysis membrane (molecular weight cut-off (MWCO): 6-8000, flat width (flat width): 50mm, length: 50mm), seal it with a dialysis clip, and place it into the device after confirming that the emulsion has no leakage. In a beaker with one liter of deionized water, change the deionized water every twelve hours for one week to obtain a clear aqueous solution containing poly(styrene-co-sodium styrene sulfonate) . The surface potential of the styrene-sodium styrene sulfonate copolymer (ie, the electric particles) is -64.7mV, ...
Embodiment 2
[0044] Add 10g of styrene, 0.4g of sodium styrenesulfonate and 85g of water into a 250ml reaction flask, stir evenly and heat to boiling for about 3mins. Next, 0.0876 g of potassium persulfate was dissolved in 5 g of water, added to the above boiling solution, and stirred for about 2 hours. Next, 0.15 g of hydroxyethyl methacrylate was added to the above boiling solution, and the stirring was continued for 2 hours. The solution was left to cool to obtain a milky aqueous solution.
[0045] Next, pour 30ml of the emulsion into the dialysis membrane (molecular weight cut-off (MWCO): 6-8000, flat width (flat width): 50mm, length: 50mm), seal it with a dialysis clip, and place it into the device after confirming that the emulsion has no leakage. In a beaker with one liter of deionized water, the deionized water was replaced every twelve hours for one week to obtain a clear aqueous solution containing styrene-sodium styrenesulfonate-hydroxyethyl methacrylate terpolymer. Clear aque...
Embodiment 3
[0047] Preparation of filter membrane
[0048] 0.2 g of the electro-conductive particles of Example 1, 8 g of p-phenylenediamine, and 0.4 g of poly(allylamine) were added to 391.2 g of water to form an aqueous monomer solution. 1.2 g of 1,3,5-triacetylchlorobenzene was added to 598.8 g of n-hexane to form an oil phase monomer solution. Next, the polyethersulfone resin (PES) substrate was placed in the aqueous monomer solution for 10 minutes, and then the substrate was taken out from the aqueous monomer solution, and the residual water on it was scraped off. Next, 45.8 grams of the oil-phase monomer solution was dropped onto the surface of the substrate and allowed to stand for 1 min. Afterwards, the n-hexane was removed, and the surface of the substrate was cleaned with water and methanol. The cleaned substrate was dried at room temperature for about 3 minutes, and then baked at about 60° C. for about 30 minutes to obtain a filter membrane with a thickness of about 300-400 n...
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