Ferromagnetic inks facilitate large scale paper recycling and reduce bleach chemical consumption

Deinking is a fundamental part of paper recycling. As the global paper consumption rises and exceeds even the annual paper production, recycling of this raw material is of high importance. Magnetic ink based on carbon coated magnetic nanoparticles enables an alternative approach to state of the art paper deinking. Magnetic deinking comprises three steps (preselection, washing, and magnetic separation of fibers). Preseparation of printed from nonprinted scraps of paper is feasible and reduces the paper mass which has to be fed into a deinking process. A consecutive washing process removes surficial magnetic ink that can be collected by application of a permanent magnet. Still, printed parts are subjected to a further continuous magnetic deinking step, where magnetic and nonmagnetic paper fibers can be separated. Magnetic deinking of a model print allows recovery of more than 80% of bright fibers without any harsh chemical treatment and the re-collection of more than 82% of magnetic ink.

Schlagwörter

Fachgebiet (DDC)

500 - Naturwissenschaften und Mathematik

Projekt

Veranstaltung

Startdatum der Ausstellung

Enddatum der Ausstellung

Startdatum der Konferenz

Enddatum der Konferenz

Datum der letzten Prüfung

ISBN

ISSN

0743-7463
1520-5827

Sprache

Englisch

Während FHNW Zugehörigkeit erstellt

Nein

Zukunftsfelder FHNW

Publikationsstatus

Veröffentlicht

Begutachtung

Peer-Review der ganzen Publikation

Open Access-Status

Closed

Lizenz

Zitation

ZELTNER, Martin, Laura M. TOEDTLI, Nora HILD, Roland FUHRER, Michaël ROSSIER, Lukas C. GERBER, Renzo RASO, Robert N. GRASS und Wendelin J. STARK, 2013. Ferromagnetic inks facilitate large scale paper recycling and reduce bleach chemical consumption. Langmuir. 2013. Bd. 29, Nr. 16, S. 5093–5098. DOI 10.1021/la400165v. Verfügbar unter: https://irf.fhnw.ch/handle/11654/47253

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