Article (Scientific journals)
Phosphorus and nitrogen derivatization as efficient route for improvement of lignin flame retardant action in PLA
Costes, Lucie; Laoutid, Fouad; Aguedo, Mario et al.
2016In European Polymer Journal, 84, p. 652 - 667
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Abstract :
[en] The present study focuses on the use of lignin, which is the second most abundant constituent of the biomass, as sustainable flame retardant additive for polylactide (PLA). Indeed, thanks to its aromatic structure, lignin could be advantageously used, in polymeric matrices, as a char promotor agent that can allow some reduction of the combustion rate. An original and simple approach, based on a two-step phosphorus/nitrogen chemical modification, is proposed to enhance the flame retardant effect of lignin in PLA. This approach has been applied on two different lignins, i.e. kraft and organosolv lignins. The effect of the plant origin, extraction mode of lignin as well as it chemical modification on both its structure and properties was investigated by using several characterization techniques. Fire properties and thermal behavior of PLA composites containing 20 wt% of both untreated and treated lignins were characterized by using cone calorimeter, UL-94 and thermogravimetric analysis (TGA). Results showed that the incorporation of untreated lignins led to a flame retardant action in PLA thanks to the formation of char but also to a significant loss of the thermal stability of PLA and to an important decrease of its time to ignition. In contrast, both phosphorus/nitrogen chemically treated lignins were found to limit PLA thermal degradation during melt processing as well as during TG experiments and also to significantly improve fire retardant properties allowing to reach V0 classification at UL-94. In this paper we also deeply investigated the nature of the gases evolved during thermal decomposition of treated and untreated lignins by using TGA-Mass spectrometer and cone calorimeter – FTIR couplings
Disciplines :
Chemistry
Author, co-author :
Costes, Lucie;  Laboratory of Polymeric & Composite Materials, Materia Nova Research Center – University of Mons UMONS, Place du Parc 23, B-7000 Mons, Belgium > Service de Génie des Procédés Chimiques, Faculté Polytechnique – University of Mons UMONS, Place du Parc 23, B-7000 Mons, Belgium
Laoutid, Fouad;  Laboratory of Polymeric & Composite Materials, Materia Nova Research Center – University of Mons UMONS, Place du Parc 23, B-7000 Mons, Belgium
Aguedo, Mario ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie biologique industrielle
Richel, Aurore  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie biologique industrielle
Brohez, Sylvain;  Service de Génie des Procédés Chimiques, Faculté Polytechnique – University of Mons UMONS, Place du Parc 23, B-7000 Mons, Belgium
Delvosalle, Christian;  Service de Génie des Procédés Chimiques, Faculté Polytechnique – University of Mons UMONS, Place du Parc 23, B-7000 Mons, Belgium
Dubois, Philippe;  Laboratory of Polymeric & Composite Materials, Materia Nova Research Center – University of Mons UMONS, Place du Parc 23, B-7000 Mons, Belgium
Language :
English
Title :
Phosphorus and nitrogen derivatization as efficient route for improvement of lignin flame retardant action in PLA
Publication date :
2016
Journal title :
European Polymer Journal
ISSN :
0014-3057
eISSN :
1873-1945
Publisher :
Elsevier Science
Volume :
84
Pages :
652 - 667
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 October 2016

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