Preparation method of monodisperse porous polymer microspheres
A porous polymer, monodisperse technology, applied in the field of polymer materials, can solve the problems of low adsorption capacity, unfavorable chromatographic packing application, small surface area of microspheres, etc.
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Embodiment 1
[0029] A method for preparing micron-scale monodisperse porous polymer microspheres, comprising the following steps:
[0030] Add 4.08 ml of divinylbenzene monomer, 0.96 ml of glycidyl methacrylate and 0.38 g of azobisisobutyronitrile to 27.24 ml of acetonitrile and 2.72 ml of toluene. After mixing, add to the polytetrafluoroethylene in the stainless steel reactor In the inner liner, nitrogen gas was introduced for 15 minutes, after removing oxygen, and then sealed; then placed in an oil bath, the temperature of the oil bath was set at 85°C, and the reaction time was 4 hours; the heating was stopped, washed with 50 ml of ethanol, and dried at 50°C to The polymer microspheres were obtained after constant weight. The average particle size was measured to be 5.26 µm, the polydispersity coefficient was 1.07, the yield was 66.9%, and the surface area (determined by nitrogen adsorption method) was 357.8 m 2 / g.
Embodiment 2
[0032] A method for preparing micron-scale monodisperse porous polymer microspheres, comprising the following steps:
[0033] 3.70 ml of divinylbenzene monomer and 0.87 ml of glycidyl methacrylate and 0.35 g of azobisisobutyronitrile were added to 28.92 ml of acetonitrile and 1.52 ml of tetrahydrofuran. After mixing, they were added to the polytetrafluoroethylene in the stainless steel reactor In the inner liner, nitrogen gas was introduced for 15 minutes, after removing oxygen, and then sealed; then placed in an oil bath, the temperature of the oil bath was set at 85°C, and the reaction time was 4 hours; the heating was stopped, washed with 50 ml of ethanol, and dried at 50°C to The polymer microspheres were obtained after constant weight. The average particle size was measured to be 5.13 µm, the polydispersity coefficient was 1.05, and the yield was 64.4%; the surface area (determined by nitrogen adsorption method) was 434.4 m 2 / g.
Embodiment 3
[0035] A method for preparing micron-scale monodisperse porous polymer microspheres, comprising the following steps:
[0036] 4.06 ml of divinylbenzene monomer and 0.95 ml of glycidyl methacrylate and 0.38 g of azobisisobutyronitrile were added to 27.27 ml of acetonitrile and 2.73 ml of propanol. In the ethylene liner, flow nitrogen for 15 minutes, remove oxygen, and seal; then place in an oil bath, the temperature of the oil bath is set at 85°C, and the reaction time is 4 hours; stop heating, wash with 50 ml of ethanol, and dry at 50°C Polymer microspheres were obtained after reaching constant weight. The average particle size was measured to be 6.13 µm, the polydispersity coefficient was 1.05, the yield was 50.6%, and the surface area (determined by nitrogen adsorption method) was 262.5 m 2 / g.
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