In this paper, bioinspired polyamidoamines (PAAs) were synthesized from N,N′-methylene bisacrylamide and nine natural α-amino acids: L-alanine, L-valine, L-leucine (M-LEU), L-histidine, L-serine, L-asparagine, L-glutamine (M-GLN), L-aspartic acid and L-glutamic acid (M-GLU) and their performance as flame retardants (FRs) for cotton were determined. The aim was to ascertain if the ability to protect cotton from fire by the process of intumescing, previously found for the glycine-derived M-GLY, was a general feature of α-amino acid-derived PAAs. None of the PAAs ignited by flame impingement, apart from M-LEU, which burned for a few seconds leaving 93% of residue. All of them formed carbon-and oxygen-rich, porous chars with a graphitic structure in the air at 350◦C, as revealed by X-ray photoelectron spectroscopy. All samples were tested as FRs for cotton by horizontal flame spread tests. At a 5% add-on, M-GLU and M-GLN extinguished the flame. The same results were obtained with all the other PAAs at a 7% add-on. The α-amino acid residues influenced the FR performance. The most effective were those that, by heating, were most suitable for producing thermally stable cyclic aromatic structures. All PAA-treated cotton samples, even when burning, left significant residues, which, according to scanning electron microscopy analysis, maintained the original cotton texture.

Polyamidoamines derived from natural α-amino acids as effective flame retardants for cotton / A. Beduini, F. Carosio, P. Ferruti, E. Ranucci, J. Alongi. - In: POLYMERS. - ISSN 2073-4360. - 13:21(2021 Oct 28), pp. 3714.1-3714.18. [10.3390/polym13213714]

Polyamidoamines derived from natural α-amino acids as effective flame retardants for cotton

A. Beduini
Primo
Investigation
;
P. Ferruti
Conceptualization
;
E. Ranucci
Penultimo
Conceptualization
;
J. Alongi
Ultimo
Conceptualization
2021

Abstract

In this paper, bioinspired polyamidoamines (PAAs) were synthesized from N,N′-methylene bisacrylamide and nine natural α-amino acids: L-alanine, L-valine, L-leucine (M-LEU), L-histidine, L-serine, L-asparagine, L-glutamine (M-GLN), L-aspartic acid and L-glutamic acid (M-GLU) and their performance as flame retardants (FRs) for cotton were determined. The aim was to ascertain if the ability to protect cotton from fire by the process of intumescing, previously found for the glycine-derived M-GLY, was a general feature of α-amino acid-derived PAAs. None of the PAAs ignited by flame impingement, apart from M-LEU, which burned for a few seconds leaving 93% of residue. All of them formed carbon-and oxygen-rich, porous chars with a graphitic structure in the air at 350◦C, as revealed by X-ray photoelectron spectroscopy. All samples were tested as FRs for cotton by horizontal flame spread tests. At a 5% add-on, M-GLU and M-GLN extinguished the flame. The same results were obtained with all the other PAAs at a 7% add-on. The α-amino acid residues influenced the FR performance. The most effective were those that, by heating, were most suitable for producing thermally stable cyclic aromatic structures. All PAA-treated cotton samples, even when burning, left significant residues, which, according to scanning electron microscopy analysis, maintained the original cotton texture.
Cotton; Functional coatings; Intumescent flame retardants; Linear polyamidoamines; α-amino acids;
Settore CHIM/04 - Chimica Industriale
PSR2015-1715FDEMA_M - PIANO DI SOSTEGNO ALLA RICERCA 2015-2017 - LINEA 2 "DOTAZIONE ANNUALE PER ATTIVITA' ISTITUZIONALE" - DEMARTIN, FRANCESCO - PSR2015-17 - Piano di sviluppo di ricerca 2015-17 - 2015
Article (author)
File in questo prodotto:
File Dimensione Formato  
polymers-13-03714.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 18.17 MB
Formato Adobe PDF
18.17 MB Adobe PDF Visualizza/Apri
polymers-13-03714_compressed(3).pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 2.73 MB
Formato Adobe PDF
2.73 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/890437
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact