Negative magnetostrictive paper formed by dispersing CoFe2O4 particles in cellulose nanofibrils

Takumi Keino; Lovisa Rova; Alia Gallet-Pandellé; Hiroki Kurita; Fumio Narita

doi:10.1038/s41598-023-31655-z

Negative magnetostrictive paper formed by dispersing CoFe₂O₄ particles in cellulose nanofibrils

Sci Rep. 2023 Apr 15;13(1):6144. doi: 10.1038/s41598-023-31655-z.

Authors

Takumi Keino¹, Lovisa Rova^{1

2}, Alia Gallet-Pandellé^{1

3}, Hiroki Kurita⁴, Fumio Narita⁵

Affiliations

¹ Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, Japan.
² Ångström Laboratory, Disciplinary Domain of Science and Technology, Department of Chemistry, Uppsala University, Uppsala, Sweden.
³ Department of Materials Science and Engineering, INSA-Lyon, Université de Lyon, Villeurbanne Cedex, France.
⁴ Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, Japan. kurita@tohoku.ac.jp.
⁵ Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, Japan. narita@material.tohoku.ac.jp.

Abstract

Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofibril (CNF)-based composite paper containing dispersed CoFe₂O₄ particles (CNF-CoFe₂O₄). Besides imparting magnetization and magnetostriction, the incorporation of CoFe₂O₄ particles decreased the ultimate tensile strength and increased the fracture elongation of the CNF-CoFe₂O₄ composite paper. CNF was responsible for the tensile properties of CNF-CoFe₂O₄ composite paper. Consequently, the magnetic and magnetostrictive properties and tensile properties of CNF-CoFe₂O₄ composite paper can be controlled by changing the mixture ratio of CNF and CoFe₂O₄ particles.