CAJ | 학술논문

采用油酸表面改性的粒径均一的Fe3 O4磁性纳米粒子( OA-Fe3 O4)与具有微相分离结构的聚苯乙烯-b-聚2-乙烯基吡啶(PS-b-P2VP)嵌段共聚物通过溶液共混,得到具有超顺磁性的PS-b-P2VP/Fe3O4纳米复合材料。结果表明,在OA-Fe3 O4质量分数为1%,3%,5%和10%时,纳米粒子分散在PS相区；但OA-Fe3 O4含量为8%时,纳米粒子在嵌段聚合物基体中的分散状态发生突变,形成大尺寸聚集体并分散在整个基体中,此时复合材料的流变行为发生相应变化。
채용유산표면개성적립경균일적Fe3 O4자성납미입자( OA-Fe3 O4)여구유미상분리결구적취분을희-b-취2-을희기필정(PS-b-P2VP)감단공취물통과용액공혼,득도구유초순자성적PS-b-P2VP/Fe3O4납미복합재료。결과표명,재OA-Fe3 O4질량분수위1%,3%,5%화10%시,납미입자분산재PS상구；단OA-Fe3 O4함량위8%시,납미입자재감단취합물기체중적분산상태발생돌변,형성대척촌취집체병분산재정개기체중,차시복합재료적류변행위발생상응변화。
Oleic acid modified Fe3 O4 nanoparticles( OA-Fe3 O4 ) 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/Fe3 O4 nanocomposites were superparamagnetic. The results showed that OA-Fe3 O4 nanoparticles were dispersed in the PS phase of PS-b-P2VP, when the mass fraction of OA-Fe3 O4 was 1%, 3%, 5% and 10%. However, when the content of OA-Fe3 O4 was 8%, the dispersion of OA-Fe3 O4 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/Fe3 O4 nanocomposites also changed.