Since the middle of the last century, many industrial and academic researchers have devoted a lot of effort to the development of safe and effective flame- retardants (FR). As regards cotton, phosphorylated compounds were the predominant FR for several decades  despite many of them had been shown to be bioaccumulative. Recently, biomolecules including proteins have been proposed as FR. Many linear polyamidoamines (PAAs), a family of synthetic polymers with exceptional structural versatility, have high thermal stability coupled with chain structure and side substituents reminding those of proteins. These features suggested that PAAs could act as FR. This presentation reports on the results obtained with a library of eight PAAs applied as coatings on cotton fabrics from aqueous solutions. All tested PAAs warrant remarkable potential as surface-confined intumescent FR. In ignitability tests, six of them exposed to direct flame for 10 s do not burn, but produce carbonaceous crusts sheltering the underneath sample. Thermogravimetric analyses show that at T ≥ 400 °C all PAAs leave in air substantial char residues that oxidize at T > 500 °C. At 450 °C they form porous carbonaceous structures indicating the tendency to intumesce. In horizontal flame spread tests, cotton stripes impregnated with most PAAs extinguish flame at add-ons ranging from 4 to 20%, whereas untreated cotton vigorously burns without leaving residues. Upon 35 kW/m2 heat flux, all PAA-treated samples significantly reduce the main combustion parameters. References  R. A. Horrocks, Polym. Degrad. Stab. 2011, 96, 377.  L. Costes, F. Laoutid, S. Brohez, P. Dubois, Mater. Sci. Eng. Report, R. 2017, 117, 1.  P. Ferruti, J. Polym. Sci, Part A: Polym. Chem. 2013, 51, 2319.  F. Danusso, P. Ferruti, Polymer 1970, 11, 88.
Linear Polyamidoamines as Novel Biocompatible Intumescent Flame Retardants for Cotton / J. Alongi, F. Carosio, P. Ferruti, A.G. Manfredi, E. Ranucci - In: Proceedings of Science and Engineering of Polymeric Materials 2018 (SEPM2018)[s.l] : Tunisian Chemical Society, 2018. - pp. 1-1 (( Intervento presentato al 3. convegno Science and Engineering of Polymeric Materials tenutosi a Port El Kantaoui nel 2018.
|Titolo:||Linear Polyamidoamines as Novel Biocompatible Intumescent Flame Retardants for Cotton|
ALONGI, JENNY (Primo) (Corresponding)
MANFREDI, AMEDEA GIUSEPPINA (Penultimo)
RANUCCI, ELISABETTA (Ultimo)
|Parole Chiave:||Linear Polyamidoamines; PAA; Biocompatible Intumescent Flame Retardants; Cotton|
|Settore Scientifico Disciplinare:||Settore CHIM/04 - Chimica Industriale|
|Data di pubblicazione:||2018|
|Enti collegati al convegno:||Tunisian Chemical Society|
|Tipologia:||Book Part (author)|
|Appare nelle tipologie:||03 - Contributo in volume|