A preparation method of micron-scale monodisperse organic/inorganic hybrid polymer microspheres
A polymer microsphere, monodisperse technology, applied in the field of emulsion polymerization, can solve the problems of complicated production process, uneven particle size distribution of products, long production cycle, etc.
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Embodiment 1
[0022] Add 20 g of monomer styrene and 0.32 g of electrolyte potassium carbonate into the reactor, and feed N 2 After replacing the air in the reactor for 3 times, add 70g of deionized water, start stirring, set the stirring speed at 200rpm, and raise the temperature to 65°C; when the temperature is stable, add cationic initiator 2,2′-even 0.48 g of azodiisobutylamidine hydrochloride (dissolved in 10 g of deionized water) initiated polymerization. After 6min, add 0.32g of SiO with negative charge on the surface 2 The particle dispersion triggers the coalescence of the primary particles, adding surface carboxylated SiO 2 Add 0.16g of cationic emulsifier tetradecyltrimethylammonium chloride to the particle water dispersion for 2 minutes to promote the secondary aggregation of particles, and add 0.8g of anionic emulsifier sodium lauryl sulfate to terminate the agglomeration reaction after 2 minutes of reaction . Maintain 65°C for 6 hours, then raise the temperature to 85°C, ke...
Embodiment 2
[0024] Add monomer styrene 30g, electrolyte potassium carbonate 0.32g into the reactor, feed N 2 After replacing the air in the reactor twice, add 60g of deionized water, start stirring, set the stirring speed at 200rpm, and raise the temperature to 65°C; when the temperature is stable, add cationic initiator 2,2′- 0.48 g of azodiisobutylamidine hydrochloride (dissolved in 10 g of deionized water) initiated polymerization. After 8min, add 0.32g of SiO with negative charge on the surface 2 The particle dispersion triggers the coalescence of the primary particles, adding surface carboxylated SiO 2 Add 0.16g of cationic emulsifier tetradecyltrimethylammonium chloride to the aqueous particle dispersion for 2 minutes to promote the secondary aggregation of particles, and add 0.8g of anionic emulsifier sodium lauryl sulfate after 4 minutes to terminate the agglomeration reaction . Maintain 65°C for 7 hours, then raise the temperature to 85°C, keep warm for 2 hours, then cool to r...
Embodiment 3
[0026] Add monomer styrene 30g, electrolyte potassium carbonate 0.32g into the reactor, feed N 2 After replacing the air in the reactor twice, add 60g of deionized water, start stirring, set the stirring speed at 200rpm, and raise the temperature to 65°C; when the temperature is stable, add cationic initiator 2,2′- 0.6 g of azodiisobutylamidine hydrochloride (dissolved in 10 g of deionized water) initiated polymerization. After 8min, add 0.48g of SiO with negative charge on the surface 2 The particle dispersion triggers the coalescence of the primary particles, adding surface carboxylated SiO 2 After 4 minutes of the particle dispersion, 0.16 g of cationic emulsifier tetradecyltrimethylammonium chloride was added to promote the secondary aggregation of particles, and after 6 minutes of reaction, 0.8 g of anionic emulsifier sodium lauryl sulfate was added to terminate the agglomeration reaction. Maintain 65°C for 7 hours, then raise the temperature to 85°C, keep warm for 2 ho...
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Abstract
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