| 主权项 |
1. A method for preparation of hydrophilic magnetic resins with high specific surface areas, the method comprising:
(a) providing a water phase by adding 0.5 to 2% by weight of gelatin and 5 to 20% by weight of salt; (b) providing an oil phase by mixing monomer reactants and toluene as a porogenic agent, adding benzoyl peroxide as an initiator, and uniformly mixing thereof; (c) adding magnetic particles wrapped and modified by oleic acid to the oil phase, uniformly mixing thereof, adding the oil phase into the water phase, and obtaining magnetic white balls after a cooling process, a filtering process, a washing process, and a drying process, wherein a weight ratio between an amount of the water phase and an amount of the oil phase is about 2.5 to 9.5:1, a stirring speed is about 100 to 400 rpm, and a temperature is control at about 60 to 80° C. for 3 to 6 hours and at about 80 to 90° C. for 5 to 8 hours; (d) swelling the magnetic white balls in dichloroethane for about 6 to 9 hours, adding 20 to 60% weight of anhydrous ferric chloride as a catalyst with respect to a weight of the magnetic white balls, raising the temperature to 80° C., and keeping the temperature at 80° C. for about 9 to 12 hours to obtain resins; and (e) washing and drying the resins obtained in step (d), dipping the resins into an aqueous sodium hydroxide solution, separating the resins using a centrifuge after another cooling process, washing the resins using water, and drying the resins to obtain the hydrophilic magnetic resins with high specific surface areas. |
