title: Ultra-Fast Layer-by-Layer Approach for Depositing Flame Retardant Coatings on Flexible PU Foams within Seconds.
abstract: In this letter, we are presenting a novel approach for the deposition of layer-by-layer (LbL) coatings capable of conferring flame retardant properties to flexible polyurethane foams exploiting subsecond deposition times. The process yields nanoscale coatings able to reduce by 33% one of the main fire safety parameters, namely the heat release rate peak, with a total treatment time of only 2.5 s. This new approach turned out to be three to 4 orders of magnitude faster than conventional LbL treatments. Such results make it possible for the exploit of LbL as a competitive, efficient and ecofriendly technology at industrial scale.
authors.affiliation: Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino , Alessandria campus, Viale Teresa Michel 5, 15121 Alessandria, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Carosio
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Milano , Via Golgi 19, 20133 Milano, Italy.
authors.forename: J
authors.initials: J
authors.lastname: Alongi
keywords: chitosan; cone calorimetry; fast deposition; flame retardancy; layer by layer; polyurethane foams