摘要
用共沉淀法制备出具有磁性的Fe3O4纳米粒子水溶液。红外光谱和XRD表明,纳米粒子是Fe3O4且其粒径在15 nm左右。通过磁滞回线得到纳米粒子比饱和磁化强度σr=56.58 emu/g。对PET薄膜进行预处理和阴离子化后,在PET表面交替吸附聚电解质聚二甲基二烯丙基氯化铵(PDDA)和纳米粒子水溶液,由于PDDA的存在,Fe3O4纳米粒子能均匀地被吸附在PET表面,形成PET基磁性膜材料,且吸附的强度较强。该材料的矫顽力为41.11 Oe,剩余磁化强度为0.66 emu,与Fe3O4纳米粒子一样,具有超顺磁性。
Magnetic nanoparticles（ Fe3O4 ） were synthesized by corecipitation method and diluted into aqueous solution. FT-IR and XRD show that the nanoparticles are Fe3O4 about 15 nm in size. Specificsaturated magnetism of the magnetic nanoparticles is 56.58 emu/g according to the magnetic hysteresis loop. Poly （ethylene terephthalate） （PET） films were pretreated and anionized, then the magnetic film materials were successfully prepared by adsorbing poly （ dimethyldiallylammonium chloride ） （ PDDA ） and magenetic nanoparticals aqueous solution alternatively on the PET films. Because of the polyelectrolyte PDDA,magnetic nanoparticles Fe304 are equally and strongly adsorbed. This magnetic film materials presents coercivity 41.11 （ Oe ）, residual magnetization （ 0.66 emu ）, and the same super-paramagnetism as magnetite nanoparticles.
出处
《精细化工》
CAS
CSCD
北大核心
2008年第1期19-22,共4页
Fine Chemicals
基金
江苏省物理化学重点学科建设基金资助(YPC200604)~~
关键词
磁性膜材料
自组装
超顺磁性
矫顽力
剩余磁化强度
magnetic film materials
self-assembly
super-paramagnetism
coercivity
residual magnetization
