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International Journal of Polymer Science
Volume 2019, Article ID 6178163, 10 pages
Research Article

Lignosulfonates as Fire Retardants in Wood Flour-Based Particleboards

1Institute for Polymers, Composites and Biomaterials, Via Campi Flegrei 34, Pozzuoli, Naples 80078, Italy
2Tecnalia Research & Innovation, Area Anardi 5, Azpeitia, Guipùzcoa E-20730, Spain
3Institute for Polymers, Composites and Biomaterials (IPCB-CNR), Via Previati 1/E, 23900 Lecco, Italy
4Interdepartmental Research Centre of Nuclear Magnetic Resonance for the Environment, Food Processing and New Materials (CERMANU), Via Università 100, Portici 80055, Italy

Correspondence should be addressed to Stefania Angelini; moc.liamg@inilegnainafets

Received 14 January 2019; Revised 9 May 2019; Accepted 7 June 2019; Published 11 July 2019

Academic Editor: De-Yi Wang

Copyright © 2019 Stefania Angelini et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Wood flour particleboards (WFP), like other wood-based items, require the addition of fire retardants (FRs) to reduce their high flammability. In this work, a waste lignosulfonate (CaLS) from paper mill is used as a low-cost FR to reduce WFP flammability. CaLS is purified by dialysis and the dialysed lignosulfonate (LD) is used, alone or combined with ammonium polyphosphate (APP), as a FR additive in the preparation of urea-formaldehyde WFP. The fire behaviour of the modified WFPs is studied by cone calorimetry. The use of 15 wt.% LD reduces the peak of heat release rate (HRR) and total smoke production by 25%, also increasing char formation. HRR peak is further reduced up to 40%, if APP is introduced in the formulation. This work discloses a viable and cost-effective strategy for improving the fire retardancy performance of WFP by partial replacement of a commercial FR with a fully renewable additive, isolated through a green and cost-effective process.