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.
Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofiber (CNF)-based composite paper containing dispersed CoFe2O4 particles (CNF–CoFe2O4). Besides imparting magnetization and magnetostriction, the CoFe2O4 particles increase the fracture elongation of the CNF–CoFe2O4 composite paper, although the ultimate tensile strength of the composite paper decreases with increasing CNF content. As strength and toughness are usually inversely proportional, it was inferred that the magnetostrictive CNF–CoFe2O4 composite paper has good toughness.
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