Preparation method of particle diameter controllable monodisperse polystyrene microspheres
A polystyrene microsphere, monodisperse technology, applied in the field of preparation of monodisperse polystyrene microspheres, can solve the problems of large distribution coefficient, uncontrollable particle size of PS microspheres, waste of manpower, financial resources and resources, and achieve The effect of simple process and easy operation
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[0025] (Example 1)
[0026] Add 9488g of ethanol and 10g of polyvinylpyrrolidone to a clean reaction vessel, pass nitrogen protection, and stir at room temperature for 20 minutes to a homogeneous system, then add 500g of styrene monomer and 2.5g of azobisisobutyronitrile . The temperature was raised to 10°C, and the reaction was performed at a constant temperature for 45 hours. After the reaction was completed, it was cooled to room temperature, the product was centrifuged, washed repeatedly with ethanol, and dried to obtain monodisperse PS microspheres with a particle size of 1.2 μm and a distribution coefficient of 2.8%.
Example Embodiment
[0027] (Example 2)
[0028] To a clean 1L four-necked flask, add 514g of ethanol, 140g of water and 13.0g of polyvinylpyrrolidone, pass into nitrogen protection, and stir at room temperature for 20 minutes to a homogeneous system, then add 32.5g of styrene monomer and ethylene glycol. Azodiisobutyronitrile 0.2g. The temperature was raised to 75°C, and the reaction was performed at a constant temperature for 16 hours. After the reaction was completed, it was cooled to room temperature, the product was centrifuged, washed repeatedly with ethanol, and dried to obtain monodisperse PS microspheres with a particle size of 2.1 μm and a distribution coefficient of 2.3%.
Example Embodiment
[0029] (Example 3)
[0030] To a clean 1L four-necked flask, add 593g of ethanol and 5.9g of polyethylene glycol, pass into nitrogen protection, and stir at room temperature for 30 minutes to a homogeneous system, then add 108g of styrene monomer and benzyl peroxide Acyl 0.7g. The temperature was raised to 50°C, and the reaction was performed at a constant temperature for 20 hours. After the reaction was completed, it was cooled to room temperature, the product was centrifuged, washed repeatedly with ethanol, and dried to obtain monodisperse PS microspheres with a particle size of 7.8 μm and a distribution coefficient of 3.1%.
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