Magnetic cellulosic materials based on TEMPO-oxidized viscose fibers

• Published in: Cellulose (London) Vol. 23; no. 6; pp. 3407 - 3415
• Main Authors: Biliuta, Gabriela, Coseri, Sergiu
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2016; Springer Nature B.V
• Subjects: Bioorganic Chemistry; Cellulose fibers; Ceramics; Chemistry; Chemistry and Materials Science; Communication; Composite materials; Composites; Fourier transforms; Glass; Infrared analysis; Infrared spectroscopy; Magnetic measurement; Magnetic properties; Nanoparticles; Natural Materials; Organic Chemistry; Oxidation; Physical Chemistry; Polymer Sciences; Scanning electron microscopy; Stability analysis; Sustainable Development; Thermal stability; TEMPO oxidation; Composites; Magnetite; Magnetic fibers; Cellulose
• ISSN: 0969-0239; 1572-882X
• DOI: 10.1007/s10570-016-1082-z

A simple method for preparation of magnetic cellulose fibers by coating (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)-oxidized viscose with oleic-acid-coated or uncoated, freshly prepared magnetic nanoparticles (MNp) is presented. MNp attachment was facilitated by chemical activation of the cellulose fibers through introduction of negatively charged carboxylic groups using the well-established TEMPO-mediated oxidation protocol. The resulting composite materials preserved the intrinsic properties of the cellulose fibers, but gained notable specific features due to the presence of magnetic nanoparticles. The obtained composite materials were characterized using spectral (Fourier-transform infrared spectroscopy) and microscopic (scanning electron microscopy) methods. Thermogravimetric analyses were carried out to evaluate the thermal stability of the magnetic fibers. The magnetic properties were evaluated using vibrating-sample magnetometry.