Materials Chemistry and Physics 238 (2019) 121921 Available online 30 July 2019 0254-0584/© 2019 Elsevier B.V. All rights reserved. Magnetic bioplastics based on isolated cellulose from cotton and sugarcane bagasse Nery M. Aguilar a, ** , F. Arteaga-Cardona a , M.E. de Anda Reyes a , J.J. Gervacio-Arciniega b , U. Salazar-Kuri a, * a Instituto de Física, Benem� erita Universidad Aut� onoma de Puebla, Apdo. Postal J-48, Puebla, Pue., 72570, Mexico b Catedr� atico Conacyt-Facultad de Ciencias Físico Matem� aticas, Benem� erita Universidad Aut� onoma de Puebla, AP 1152, Puebla, Pue., 72000, Mexico HIGHLIGHTS G R A P H I C A L ABSTRACT � Cotton and sugarcane bagasse were used as natural sources to obtain the cellulose biopolymers. � Magnetic bioplastics were fabricated by immersion of the biopolymers in a MnFe 2 O 4 ferrofuid. � Films are thermal stable independently of the source of extraction and the nanoparticles. � The optical transmittance of the flms was not signifcantly affected by the nanoparticles. � Nanoparticles superparamagnetic behavior was maintained after the for- mation of the composites. A R T I C L E INFO Keywords: Cellulose Biopolymer Bioplastics Composites Manganese ferrite nanoparticles ABSTRACT Composites based on artifcial polymeric matrices and nanostructures with novel properties have attracted attention due to their potential applications in biomedicine, wastewater treatment and electronics. In this paper, a smart bioplastic based on cellulose flms with adsorbed magnetic nanoparticles was fabricated. A delignif- cation of cotton and sugarcane bagasse was used to obtain the biopolymers. The composite was obtained by immersion of the cellulose-based biopolymers into a 24 nm MnFe 2 O 4 ferrofuid. X-ray diffraction showed the crystalline formation of two polymorphs of cellulose, type I for cotton and type II for sugarcane bagasse, as well as the spinel structure of the nanoparticles. DSC/TGA showed that the composites thermal stability is inde- pendent of the source of extraction as well as the deposition of the nanoparticles. Nanoparticles magnetic measurements showed a superparamagnetic hysteresis shape, which is maintained in the magnetic bioplastics. MFM showed the distribution of the nanoparticles over the bioplastics and its single domain features. The optical transmittance of the composite was not drastically affected by the adsorption of the nanoparticles. Such com- posites represent an exciting class of biodegradable functional materials for optical and magnetic applications. * Corresponding author. ** Corresponding author. E-mail addresses: nerygma3195@gmail.com (N.M. Aguilar), farteaga@ifuap.buap.mx (F. Arteaga-Cardona), mdeanda@ifuap.buap.mx (M.E. de Anda Reyes), jjgervacio@fcfm.buap.mx (J.J. Gervacio-Arciniega), usalazar@ifuap.buap.mx (U. Salazar-Kuri). Contents lists available at ScienceDirect Materials Chemistry and Physics journal homepage: www.elsevier.com/locate/matchemphys https://doi.org/10.1016/j.matchemphys.2019.121921 Received 14 May 2019; Received in revised form 22 July 2019; Accepted 29 July 2019