Preparation method for novel PS-co-PVEA@SiO2

[0017] First, ultrasonically disperse the double-bond-modified nano-silica (MPS-SiO 2 ) alcohol solution for 20 min, take 20 ml (0.4 g) into a 50 ml three-necked flask, then add 1 g of styrene, 1 g of 4-vinylphenyl N, N-diethylamine monomer, divinyl 40 mg of benzene, 60 mg of azobisisobutyronitrile, ultrasonically dispersed for 5 min. Nitrogen and oxygen discharge were repeated 5 times, the system was sealed, and placed in a water bath at 70 °C for 20 h. At the end of the reaction, the final product was repeatedly centrifuged, ultrasonically dispersed and washed, and vacuum-dried at 40 °C.

[0019] First, ultrasonically disperse the double-bond-modified nano-silica (MPS-SiO 2 ) alcohol solution for 20 min, take 20 ml (0.4 g) into a 50 ml three-necked flask, then add 1 g of styrene, 1 g of 4-vinylphenyl N, N-diethylamine monomer, and 40 g of divinylbenzene mg, polyvinylpyrrolidone 0.2 g, azobisisobutylcyanide 60 mg, ultrasonically dispersed for 5 min. Nitrogen and oxygen discharge were repeated 5 times, the system was sealed, and placed in a water bath at 70 °C for 20 h. At the end of the reaction, the final product was repeatedly centrifuged, ultrasonically dispersed and washed, and vacuum-dried at 40 °C.

[0021] First, ultrasonically disperse the double-bond-modified nano-silica (MPS-SiO 2 ) alcohol solution for 20 min, take 20 ml (0.4 g) and place it in a 50 ml three-necked flask, then add 1 g of styrene, 1 g of 4-vinylphenyl N, N-diethylamine monomer, and divinyl Benzene 20 mg, polyvinylpyrrolidone 0.2 g, azobisisobutyrocyanide 60 mg, ultrasonically dispersed for 5 min. Nitrogen and oxygen discharge were repeated 5 times, the system was sealed, and placed in a water bath at 70 °C for 20 h. At the end of the reaction, the final product was repeatedly centrifuged, ultrasonically dispersed and washed, and vacuum-dried at 40 °C.