表面阳离子化纳米SiO2与端官能化聚苯乙烯的静电组装行为

Electrostatic-assembly Behavior Between Cationically Modified Silica and End-functionalized Polystyrene

Polystyrene brushes were constructed on cationically modified silica nanoparticles(SiO2-CBAFS)by electrostatic-assembly.TGA,TEM,AFM and contact angle were used to characterize the mass loss,microscopic images,topology,surface property of the products,respectively.The results show that PS-NH-SO3Na can be successfully attached to the surface of SiO2-CBAFS nanoparticles by electrostatic-assembly with high grafting density,which is much higher than that from the reports;the aggregation of silica can be prevented efficiently by being assembled a monolayer of PS-NH-SO3Na;the water contact angles of the Si/SiO2-CBAFS/PS-NH-SO3Na decrease with the increase of molecular weight and the mass concentration of PS-NH-SO3Na under different environments.

Abstract Polystyrene brushes were constructed on cationically modified silica nanoparticles（SiO2-CBAFS） by electrostatic-assembly＇. TGA, TEM, AFM and contact angle were used to characterize the mass loss, microscopic images, topology, surface property of the products, respectively. The results show that PS-NH-SOaNa can be successfully attached to the surface of SiO2-CBAFS nanoparticles by electrostatic-assembly with high grafting density, which is much higher than that from the reports; the aggregation of silica can be prevented efficiently by being assembled a monolayer of PS-NH-SO3 Na; the water contact angles of the Si/SiO2-CBAFS/ PS-NH-SOaNa decrease with the increase of molecular weight and the mass concentration of PS-NH-SOaNa under different environments.