Behavior and Fate of Halloysite Nanotubes (HNTs) When Incinerating PA6/HNTs Nanocomposite

Ghania Ounoughene 1, 2, 3 Olivier Le Bihan 4 C. Chivas-Joly 5 C. Motzkus 5 C. Longuet 6 Bruno Debray 4 A. Joubert 1, 2 Laurence Le Coq 2, 1 J-M. Lopez-Cuesta 6
1 Mines Nantes - Mines Nantes
2 GEPEA - Laboratoire de génie des procédés - environnement - agroalimentaire
3 ADEME - Agence de l'Environnement et de la Maîtrise de l'Energie
4 INERIS - Institut National de l'Environnement Industriel et des Risques
5 LNE - Laboratoire National de Métrologie et d'Essais [Trappes]
6 C2MA - Centre des Matériaux des Mines d'Alès
Abstract : Nanoclay-based nanocomposites have been widely studied and produced since the late 1990s, and frequently end up in waste disposal plants. This work investigates the behavior of PA6/HNTs nano composites (nylon-6 incorporating halloysite nanotubes) during incineration. Incineration tests were performed at lab-scale using a specific tubular furnace modified in order to control the key incineration parameters within both the combustion and postcombustion zones. The combustion residues and combustion aerosol (particulate matter and gas phase) collected downstream of the incinerator furnace were characterized using various aerosol analysis techniques. Time tracking of the gas and particle-number concentrations revealed two-step char formation during combustion. HNTs transformed into other mineral structures which were found in both the aerosol and the residues. During combustion of the polymer, it appears that HNTs contribute to the formation of a cohesive char layer that protects the residual material.
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Ghania Ounoughene, Olivier Le Bihan, C. Chivas-Joly, C. Motzkus, C. Longuet, et al.. Behavior and Fate of Halloysite Nanotubes (HNTs) When Incinerating PA6/HNTs Nanocomposite. Environmental Science and Technology, American Chemical Society, 2015, 49 (9), pp.5450-5457. ⟨10.1021/es505674j⟩. ⟨hal-01201688⟩

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