Wang Yen-Zen, Cheng Yu-Wei, Ho Lin-Chia, Huang Wen-Yao, Ho Ko-Shan, Syu Yu-Ting
Department of Chemical and Materials Engineering, National Yu-Lin University of Science & Technology, Yun-Lin 640301, Taiwan.
Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan.
Polymers (Basel). 2021 Jul 20;13(14):2380. doi: 10.3390/polym13142380.
Oleic acid (OA)-modified FeO nanoparticles were successfully covered with polyanilines (PANIs) via inverse suspension polymerization in accordance with SEM and TEM micrographs. The obtained nanoparticles were able to develop into a ferrite (α-Fe) and α″-FeN mixture with a superparamagnetic property and high saturated magnetization (SM) of 245 emu g at 950 °C calcination under the protection of carbonization materials (calcined PANI) and other iron-compounds (α″-FeN). The SM of the calcined iron-composites slightly decreases to 232 emu g after staying in the open air for 3 months. The calcined mixture composite can be ground into homogeneous powders without the segregation of the iron and carbon phases in the mortar without significantly losing magnetic activities.
根据扫描电子显微镜（SEM）和透射电子显微镜（TEM）图像，通过反相悬浮聚合成功地用聚苯胺（PANI）包覆了油酸（OA）修饰的FeO纳米颗粒。在碳化材料（煅烧的PANI）和其他铁化合物（α″-FeN）的保护下，所得纳米颗粒在950℃煅烧时能够形成具有超顺磁性和245 emu g高饱和磁化强度（SM）的铁素体（α-Fe）和α″-FeN混合物。煅烧后的铁复合材料在空气中放置3个月后，其SM略有下降，降至232 emu g。煅烧后的混合复合材料可以在研钵中研磨成均匀的粉末，铁相和碳相不会分离，且磁活性不会显著损失。
