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Article

Superparamagnetic, High Magnetic α-Fe & α″-Fe16N2 Mixture Prepared from Inverse Suspension-Polymerized Fe3O4@polyaniline Composite

1
Department of Chemical and Materials Engineering, National Yu-Lin University of Science & Technology, Yun-Lin 640301, Taiwan
2
Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
3
National Defense Medical Center, 161 Sec. 6 Minquan E. Rd., Neihu District, Taipei City 11490, Taiwan
4
Department of Photonics, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
5
Department of Chemical and Materials Engineering, National Kaohsiung University of Science & Technology, 415 Chien-Kuo Rd., Kaohsiung 80782, Taiwan
*
Authors to whom correspondence should be addressed.
Wen-Yao Huang and Ko-Shan Ho equally contributed to this work.
Academic Editor: Patrick Ilg
Polymers 2021, 13(14), 2380; https://doi.org/10.3390/polym13142380
Received: 11 June 2021 / Revised: 8 July 2021 / Accepted: 15 July 2021 / Published: 20 July 2021
(This article belongs to the Special Issue Advanced Polymer Nanocomposites II)
Oleic acid (OA)-modified Fe3O4 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″-Fe16N2 mixture with a superparamagnetic property and high saturated magnetization (SM) of 245 emu g−1 at 950 °C calcination under the protection of carbonization materials (calcined PANI) and other iron-compounds (α″-Fe16N2). The SM of the calcined iron-composites slightly decreases to 232 emu g−1 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. View Full-Text
Keywords: polyaniline; ferrite; α″-Fe16N2; superparamagnetic; inverse suspension polymerization polyaniline; ferrite; α″-Fe16N2; superparamagnetic; inverse suspension polymerization
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MDPI and ACS Style

Wang, Y.-Z.; Cheng, Y.-W.; Ho, L.-C.; Huang, W.-Y.; Ho, K.-S.; Syu, Y.-T. Superparamagnetic, High Magnetic α-Fe & α″-Fe16N2 Mixture Prepared from Inverse Suspension-Polymerized Fe3O4@polyaniline Composite. Polymers 2021, 13, 2380. https://doi.org/10.3390/polym13142380

AMA Style

Wang Y-Z, Cheng Y-W, Ho L-C, Huang W-Y, Ho K-S, Syu Y-T. Superparamagnetic, High Magnetic α-Fe & α″-Fe16N2 Mixture Prepared from Inverse Suspension-Polymerized Fe3O4@polyaniline Composite. Polymers. 2021; 13(14):2380. https://doi.org/10.3390/polym13142380

Chicago/Turabian Style

Wang, Yen-Zen, Yu-Wei Cheng, Lin-Chia Ho, Wen-Yao Huang, Ko-Shan Ho, and Yu-Ting Syu. 2021. "Superparamagnetic, High Magnetic α-Fe & α″-Fe16N2 Mixture Prepared from Inverse Suspension-Polymerized Fe3O4@polyaniline Composite" Polymers 13, no. 14: 2380. https://doi.org/10.3390/polym13142380

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