Fe_3O_4/N-异丙烯酰胺(PNIPAM)纳米颗粒的合成  

Synthesis of Fe_3O_4/Poly(N-isopropylacrylamide)(PNIPAM) Nanoparticles

作　　者：仲慧[1] 张莉莉[1] 张维光[1] 王宝珠[1] 朱玉兰[1] 

机构地区：[1]江苏省低维材料化学重点建设实验室,淮阴师范学院化学系,淮安223300

出　　处：《无机化学学报》2007年第8期1457-1462,共6页Chinese Journal of Inorganic Chemistry

基　　金：江苏省教育厅自然科学基金(04KJB150016);江苏省自然科学基金(BK2006061)。

摘　　要：A magnetic and thermosensitive poly(N-isopropylacrylamide)(PNIPAM) nanoparticles were prepared by the following procedure. The core-shell composite microparticles were synthesized by precipitating polymerization with Fe3O4 being entrapped with SiO2 as core and cross-linked PNIPAM as shell. Then,the SiO2 core was etched by hydrofluoric acid and magnetic thermosensitive Fe3O4 /PNIPAM particles were formed. It has also been shown that the Fe3O4/PNIPAM nanoparticles are featured by lower critical solution temperature (LCST) at 33.0 ℃ while the temperature varies from 28.0 ℃ to 36.0 ℃. The composite magnetic thermosensitive particles were characterized by XRD,SEM,TEM and FTIR. The synthetic mechanism is also discussed.A magnetic and thermosensitive poly（N-isopropylacrylamide）（PNIPAM） nanoparticles were prepared by the following procedure. The core-shell composite microparticles were synthesized by precipitating polymerization with Fe3O4 being entrapped with SiO2 as core and cross-linked PNIPAM as shell. Then,the SiO2 core was etched by hydrofluoric acid and magnetic thermosensitive Fe3O4 /PNIPAM particles were formed. It has also been shown that the Fe3O4/PNIPAM nanoparticles are featured by lower critical solution temperature （LCST） at 33.0 ℃ while the temperature varies from 28.0 ℃ to 36.0 ℃. The composite magnetic thermosensitive particles were characterized by XRD,SEM,TEM and FTIR. The synthetic mechanism is also discussed.

关 键 词：温敏 核壳 纳米颗粒 磁性物质 

分 类 号：O614.8[理学—无机化学] O631.2[理学—化学]