Preparation method of monodispersity micron-sized polysilicon microspheres
A polyorganosilicon and monodispersity technology, which is applied in the field of monodisperse micron-scale polyorganosilicon microspheres and its preparation, can solve the problem that the particle size of the organosilicon microspheres is difficult to be monodispersed and the coverage rate of organic functional groups is low. , the post-processing is cumbersome and other problems, to achieve the effect of good particle size uniformity, fewer types of raw materials, and easy control of the reaction
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Example Embodiment
[0027] Example 1
[0028] (1) In a reactor equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen flow device, add 80ml of deionized water and 15ml of vinyltrimethoxysilane, and then add 0.008ml of a mass percentage concentration of 28% The reaction temperature is 30℃, the stirring speed is 300rpm, and the reaction time is 6h.
[0029] (2) Centrifuge the mixed system of step (1) on a centrifugal settling machine to filter out unreacted monomers at a speed of 5000 rpm and a time of 20 minutes.
[0030] (3) To the reaction system obtained in step (2), add 0.5 ml of an ammonia solution with a 28% mass percentage concentration, the reaction temperature is 30° C., the stirring speed is 500 pm, and the time is 1 h. The obtained product was filtered, washed with water and ethanol, and dried at 100°C for 15 hours to obtain 7.6 g of monodisperse micron-sized silicone microspheres with an average particle size of 1.6 μm, such as figure 1 Shown.
Example Embodiment
[0031] Example 2
[0032] The difference between this embodiment and Embodiment 1 is:
[0033] Step (1) Drop 0.03ml of 28% aqueous ammonia solution with a mass percentage concentration of 8 hours, and step (3) add 0.7ml of 28% aqueous ammonia solution with a mass percentage concentration of 4 hours to obtain monodisperse Micron-sized silicone microspheres are 7.4g, with an average particle size of 1.4μm.
Example Embodiment
[0034] Example 3
[0035] The difference between this embodiment and Embodiment 1 is:
[0036] Step (1) add 5ml of vinyltrimethoxysilane, the reaction temperature is 40℃, the speed of the mixed system in step (2) is 4000rpm, time 15min, step (3) add 0.3ml mass percentage A 28% ammonia aqueous solution and a reaction time of 3 hours obtain 2.5 g of monodisperse micron-sized organic silicon microspheres with an average particle size of 2 μm.
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