Magnetic responsive cellulose nanocomposites Sonja Prnil 8 3

Magnetic responsive cellulose nanocomposites Sonja Päärnilä 8. 3. 2016

Overview • Production of magnetic fibers • Coaxial wet spinning • Applications

Production of magnetic fibers Lumen-loading • Physical • Magnetic NP + cellulose pulp • Vigorous stirring • Washing • Heterogeneous composite Liu et al. 2013 In situ co-precipitation • Chemical • Iron ions + cellulose pulp • Vigorous stirring • Na. OH Fe 3 O 4 • Better control of magnetic properties • Modification: stepwise dipping process

Fibers with coaxial wet spinning Kou et al. 2014

Other morphologies Films Microspheres B) A) Liu et al. 2013 Hydrogels and aerogels Liu et al. 2013

Applications Magnetic shielding Magnetic imaging Sonehara et al. 2009 Lutz et al. 2006

Applications Cell and protein separation Munaweera et al. 2014 Filters Pinchuk et al. 1994 Other applications: magnetic paper, electromagnetically driven printing, sensors, information storage etc.

Conclusions • Lumen-loading and in situ • Coaxial wet spinning one possible method to produce fibers • Many applications for magnetic nanocomposites

References • Kou, L. & Huang, T. & Zheng, B. & Han, I. & Zhao, X. Gopalsamy, K. & Sun, H. & Gao, C. 2014. Coaxial wet-spun yarn supercapacitors for high-energy density and safe wearable electronics. Nature communications. Vol 5. Pp. 1 -10. • Liu, S. & Luo, X. & Zhou, J. 2013. Magnetic responsive cellulose nanocomposites and their applications. Cellulose – medical, pharmaceutical and electronic applications. Pp. 105 -124. • Lutz, J. F. & Stiller, S. & Hoth, A. & Kaufner, L. & Pison, U. Cartier, R. 2006. One-pot synthesis of PEGylated ultrasmall iron-oxide nanoparticles and their in vivo evaluation as magnetic resonance imaging contrast agents. Vol 7. Pp. 3132 -3138. • Munaweera, I. & Aliev, A. & Balkus, K. J. 2014. Electrospun cellulose acetate-garnet nanocomposites magnetic fibers for bioseparations. ACS Applied materials and interfaces. Vol 6. Pp. 244 -251. • Pinchuk, L. S. & Markova, L. V. & Gromyko, Yu. V. & Markov, E. M. & Choi, U. S. 1994. Polymeric magnetic fibrous filters. Journal of materials processing technology. Vol 55. Pp. 345 -350. • Sonehara, M. & Noguchi, S. & Kurashina, T. & Sato, T. & Yamasawa, K. & Miura, Y. 2009. Development of an electromagnetic wave shielding textile by electroless Ni-based alloy plating. IEEE transactions on magnetics. Vol 45: 10. Pp. 4173 -4175.