writer：Zhijie Zhang, Jiang Gong, Haiying Tan, Kun Yao, Tao Tang*
keywords：OA-Fe3O4
source：期刊
specific source：Chemical Journal of Chinese Universities-Chinese 35(5) (2014) 1080-1085
Issue time：2014年
Oleic acid modified Fe3O4 nanoparticles(OA-Fe3O4) with uniform particle size were blended with polystyrene-b-poly (2-vinyl pyridine) (PS-b-P2VP) that had micro-phase separation structure using solution-mixing method. The resultant PS-b-P2VP/Fe3O4 nanocomposites were superparamagnetic. The results showed that OA-Fe3O4 nanoparticles were dispersed in the PS phase of PS-b-P2VP, when the mass fraction of OA-Fe3O4 was 1%, 3%, 5% and 10%. However, when the content of OA-Fe3O4 was 8%, the dispersion of OA-Fe3O4 particles in the PS-b-P2VP matrix changed dramatically. In this case, the nanoparticles formed large aggregates, which were dispersed across PS-b-P2VP matrix. Meanwhile the rheological properties of PS-b-P2VP/Fe3O4 nanocomposites also changed.