Citation

Kundu CK, Wang X, Song L, Hu Y. Int. J. Biol. Macromol. 2019; ePub(ePub): ePub.

Affiliation

State Key Laboratory of Fire Science, University of Science and Technology of China, 96 JinZhai Road, Hefei, Anhui 230026, PR China. Electronic address: yuanhu@ustc.edu.cn.

Copyright

(Copyright © 2019, Elsevier Publishing)

DOI

10.1016/j.ijbiomac.2019.11.220

PMID

31809778

Abstract

Chitosan (CS) and phosphorylated chitosan (PCS) were deposited onto the polyamide 66 (PA66) fabric surfaces along with poly-acrylate sodium (PAS) via 'one pot' and layer by layer (LbL) assembly methods in preparing flame retardant coatings. Subsequently, to stabilize the deposited coatings, some of the fabric samples were treated under the UV-irradiation and additionally, a thermal treatment was also carried out for the remaining fabric samples. The LbL assembled fabrics showed a better homogeneity in the coating structure over the one pot deposited fabrics as appeared in scanning electron microscopy (SEM). Nonetheless, the LbL treated fabric sample (i.e., PA66-10BL-UV) with a higher weight gain% exhibited a greater improvement in limiting oxygen index (LOI) (i.e., 23%), and a reduced peak heat release rate (pHRR) (i.e., 25%). Yet more, only the LbL assembled and thermally cross-linked fabric sample could able to retain the flame retardant behavior in the vertical burning test even after 5 washing cycles.

Copyright © 2019. Published by Elsevier B.V.

Language: en

Keywords

Chitosan; Flame retardancy; Layer by layer assembly; One pot deposition; Polyamide 66 fabric