Oversized-pore crystal gel microsphere and preparation method thereof
A technology of porous crystals and microspheres, applied in the field of crystal colloidal microspheres and their preparation, can solve the problems of difficult preparation of micron-scale spherical media, and achieve the effects of low cost, simple preparation process, easy control and amplification
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[0023] The preparation method of the ultra-large pore crystal colloidal microsphere comprises the following steps:
[0024] 1) Mix monomer acrylamide and crosslinking agent at a molar ratio of 10:1~5:1 to prepare a solution with a total mass concentration of 5%~10%;
[0025] 2) Add inorganic nanoparticles, the total mass ratio of inorganic nanoparticles to monomer acrylamide and crosslinking agent is 0~1:1, mix and stir evenly, and ultrasonically disperse at 20°C~35°C to make the inorganic nanoparticles uniform dispersed in solution;
[0026] 3) At 0~5°C, add the activator, initiator and monomer acrylamide into the dispersed solution at a mass ratio of 1:100 and stir to dissolve as the dispersed phase, and the dispersed phase is added to the dissolved In the continuous phase of the agent, the mass ratio of the dispersed phase to the continuous phase is 1:5~1:4. Under the condition of the mechanical stirring speed of 500~550rpm, the reverse phase suspension dispersion system i...
Embodiment 1
[0032] 1) Mix monomer acrylamide and cross-linking agent N, N'-methylenebisacrylamide at a molar ratio of 10:1 to prepare a solution with a total mass concentration of 5%;
[0033] 2) Add inorganic nanoparticles, the total mass ratio of inorganic nanoparticles to monomer acrylamide and crosslinking agent N,N'-methylenebisacrylamide is 0, mix and stir evenly, and perform ultrasonic dispersion at 20°C to make Inorganic nanoparticles are uniformly dispersed in the solution;
[0034] 3) At 0°C, tetramethylethylenediamine, ammonium persulfate and monomer acrylamide were added to the dispersed solution at a mass ratio of 1:100 and stirred to dissolve as a dispersed phase, and the dispersed phase was added to In the n-hexane solution continuous phase in which Span 80 is dissolved, the mass ratio of the dispersed phase to the continuous phase is 1:5. Under the condition that the mechanical stirring speed is 500rpm, a reverse-phase suspension dispersion system is formed and stirred for...
Embodiment 2
[0038] 1) Mix monomer acrylamide and cross-linking agent N, N'-methylenebisacrylamide at a molar ratio of 5:1 to prepare a solution with a total mass concentration of 10%;
[0039] 2) Add inorganic nanoparticles, the total mass ratio of inorganic nanoparticles to monomer acrylamide and crosslinking agent N, N'-methylenebisacrylamide is 1:1, mix and stir evenly, and perform ultrasonic dispersion at 35°C , so that the inorganic nanoparticles are uniformly dispersed in the solution;
[0040] 3) At 5°C, tetramethylethylenediamine, ammonium persulfate and monomer acrylamide were added to the dispersed solution at a mass ratio of 1:100 and stirred to dissolve as a dispersed phase, and the dispersed phase was added to In the n-hexane solution continuous phase in which Span 80 is dissolved, the mass ratio of the dispersed phase to the continuous phase is 1:4. Under the condition that the mechanical stirring speed is 550rpm, a reverse-phase suspension dispersion system is formed and st...
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