The Layer by Layer (LbL) technique has been exploited for depositing a completely inorganic silica coating on 0.2- and 1- mm thick polycarbonate (PC) films. The modification of the surface of the polymer substrate has been assessed by contact angle measurements, SEM and FT-IR analyses. The flammability and combustion behaviour of the LbL-treated films have also been investigated: surprisingly, the coatings deposited on 0.2 mm PC films have suppressed the incandescent melt dripping during the flammability tests. Furthermore, cone calorimetry tests have shown a great enhancement of the flame retardancy properties of PC, after the LbL treatment. On the other hand, a significant decrease of the performances of 1- mm coated substrates has been observed and ascribed to the too low surface-to-bulk ratio and to the poor coating stability during the combustion, as revealed by SEM analysis.

Layer by Layer nanoarchitectures for the surface protection of polycarbonate / Carosio, Federico; Alessandro Di, Blasio; Alongi, Jenny; Malucelli, Giulio. - In: EUROPEAN POLYMER JOURNAL. - ISSN 0014-3057. - STAMPA. - 49:(2013), pp. 397-404. [10.1016/j.eurpolymj.2012.10.032]

Layer by Layer nanoarchitectures for the surface protection of polycarbonate

CAROSIO, FEDERICO;ALONGI, JENNY;MALUCELLI, Giulio
2013

Abstract

The Layer by Layer (LbL) technique has been exploited for depositing a completely inorganic silica coating on 0.2- and 1- mm thick polycarbonate (PC) films. The modification of the surface of the polymer substrate has been assessed by contact angle measurements, SEM and FT-IR analyses. The flammability and combustion behaviour of the LbL-treated films have also been investigated: surprisingly, the coatings deposited on 0.2 mm PC films have suppressed the incandescent melt dripping during the flammability tests. Furthermore, cone calorimetry tests have shown a great enhancement of the flame retardancy properties of PC, after the LbL treatment. On the other hand, a significant decrease of the performances of 1- mm coated substrates has been observed and ascribed to the too low surface-to-bulk ratio and to the poor coating stability during the combustion, as revealed by SEM analysis.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2503601
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