Multifunctional organic-inorganic composite polymeric microball and preparing method thereof
A technology of polymer microspheres and composite polymers, applied in the field of organic-inorganic composite polymer microspheres and their preparation, to achieve high stability and simple operation
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Embodiment 1
[0033] Example 1: In a 500mL three-necked flask, add 2.0g of an aqueous dispersion of ferric oxide, add 40mL of water, 3mL of concentrated ammonia water and 160mL of methanol, stir at high speed (about 500 rpm) for 0.5 hours, and mix thoroughly. Then add a mixed solution of tetraethyl orthosilicate and methanol (3mL tetraethyl orthosilicate + 30mL methanol), stir at high speed for 5 minutes, then adjust the stirring speed to about 150 rpm, and then place it in an oil bath at 40°C After the reaction was carried out for 24 hours, 2.0 mL of coupling agent MPS was added, and the reaction was continued for 24 hours. Finally, the reaction system was cooled to room temperature with stirring. The product was collected by centrifugation, washed several times with ethanol and water, and finally divided into deionized water to obtain an aqueous dispersion of ferric oxide nanoparticles coated with silicon dioxide modified by a silane coupling agent. The solids content is about 2.0 wt%. ...
Embodiment 2
[0035] Example 2: In a 500mL three-necked flask, add 4.20g of an aqueous dispersion of ferric oxide, add 40mL of water, 3mL of concentrated ammonia water and 160mL of methanol, stir at high speed (about 500 rpm) for 0.5 hours, and mix thoroughly. Then add a mixed solution of tetraethyl orthosilicate and methanol (3mL tetraethyl orthosilicate + 30mL methanol), stir at high speed for 5 minutes, then adjust the stirring speed to about 150 rpm, and then place it in an oil bath at 40°C After the reaction was carried out for 24 hours, 2.0 mL of MPS was added, and the reaction was continued for 24 hours. Finally, the reaction system was cooled to room temperature with stirring. The product is collected by centrifugation, washed with ethanol and water several times, and finally divided into deionized water to obtain an aqueous dispersion of ferric oxide coated with silicon dioxide modified by a silane coupling agent. About 2.0 wt%.
[0036] In a 100mL three-necked flask, add 2.0g of...
Embodiment 3
[0037] Example 3: In a 500mL three-necked flask, add 4.20g of an aqueous dispersion of ferric oxide, add 40mL of water, 3mL of concentrated ammonia water and 160mL of methanol, stir at high speed (about 500 rpm) for 0.5 hours, and mix thoroughly. Then add a mixed solution of tetraethyl orthosilicate and methanol (3mL tetraethyl orthosilicate + 30mL methanol), stir at high speed for 5 minutes, then adjust the stirring speed to about 150 rpm, and then place it in an oil bath at 40°C After the reaction was carried out for 24 hours, 2.0 mL of MPS was added, and the reaction was continued for 24 hours. Finally, the reaction system was cooled to room temperature with stirring. The product is collected by centrifugation, washed with ethanol and water several times, and finally divided into deionized water to obtain an aqueous dispersion of ferric oxide coated with silicon dioxide modified by a silane coupling agent. About 2.0 wt%.
[0038] In a 100mL three-necked flask, add 2.0g of...
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