Modified nano-silica, PVDF micro-filtration membrane and application of PVDF micro-filtration membrane
A nano-silica, silica technology, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve problems such as membrane pollution and unfavorable practical application.
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Embodiment 1
[0071] A modified nano silicon dioxide, prepared by the following method:
[0072] (1) Disperse 20g of silicon dioxide with a particle size of 90nm in 500ml of anhydrous toluene, add 100g of aminopropyltriethoxysilane, fill with nitrogen and heat to boiling, then reflux at constant temperature (105°C) for 48h, and then sequentially Wash with anhydrous toluene and anhydrous acetone, and dry in vacuum to obtain aminated nano-silica;
[0073] (2) Disperse 10g of aminated nano-silica in 50g of paraffin at 75°C, then add 500mL of deionized water, stir rapidly at 1600rpm for 1h, and then cool the system to room temperature. Wash the paraffin wax solid particles 10 times with deionized water, remove the nano-silica particles that are not attached or loosely attached to the paraffin, and obtain paraffin balls whose surface is covered with aminated nano-silica.
[0074] (3) Disperse 25 g of paraffin balls covered with aminated nano-silica in 500 ml of anhydrous xylene, add 25 g of tri...
Embodiment 2
[0084] A modified nano silicon dioxide, prepared by the following method:
[0085] (1) Disperse 20g of silicon dioxide with a particle size of 300nm in 500ml of anhydrous toluene, add 80g of aminopropyltriethoxysilane, heat to boiling after filling with nitrogen, then reflux at constant temperature (105°C) for 48h, and then Wash with anhydrous toluene and anhydrous acetone, and dry in vacuum to obtain aminated nano-silica;
[0086] (2) Disperse 10g of aminated nano-silica in 50g of paraffin at 75°C, then add 500mL of deionized water, stir rapidly at 1600rpm for 1h, and then cool the system to room temperature. Wash the paraffin wax solid particles 10 times with deionized water, remove the nano-silica particles that are not attached or loosely attached to the paraffin, and obtain paraffin balls whose surface is covered with aminated nano-silica.
[0087] (3) Disperse 25 g of paraffin balls covered with aminated nano-silica in 500 ml of anhydrous xylene, add 25 g of triethylami...
Embodiment 3
[0097] A modified nano silicon dioxide, prepared by the following method:
[0098] (1) Disperse 20g of silicon dioxide with a particle size of 1100nm in 500ml of anhydrous toluene, add 80g of aminopropyltriethoxysilane, fill with nitrogen and heat to boiling, then reflux at constant temperature (105°C) for 48h, and then sequentially Wash with anhydrous toluene and anhydrous acetone, and dry in vacuum to obtain aminated silicon dioxide;
[0099] (2) Disperse 10g of aminated nano-silica in 50g of paraffin at 75°C, then add 500mL of deionized water, stir rapidly at 1600rpm for 1h, and then cool the system to room temperature. Wash the paraffin wax solid particles 10 times with deionized water, remove the nano-silica particles that are not attached or loosely attached to the paraffin, and obtain paraffin balls whose surface is covered with aminated nano-silica.
[0100] (3) Disperse 25 g of paraffin balls covered with aminated nano-silica in 500 ml of anhydrous xylene, add 25 g o...
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