A green approach to constructing multilayered nanocoating for flame retardant treatment of polyamide 66 fabric from chitosan and sodium alginate

Chanchal Kumar Kundu; Wei Wang; Shun Zhou; Xin Wang; Haibo Sheng; Ying Pan; Lei Song; Yuan Hu

doi:10.1016/j.carbpol.2017.02.084

A green approach to constructing multilayered nanocoating for flame retardant treatment of polyamide 66 fabric from chitosan and sodium alginate

Carbohydr Polym. 2017 Jun 15:166:131-138. doi: 10.1016/j.carbpol.2017.02.084. Epub 2017 Feb 24.

Authors

Chanchal Kumar Kundu¹, Wei Wang¹, Shun Zhou¹, Xin Wang², Haibo Sheng¹, Ying Pan¹, Lei Song¹, Yuan Hu³

Affiliations

¹ State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China.
² State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China. Electronic address: wxcmx@ustc.edu.cn.
³ 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.

PMID: 28385215
DOI: 10.1016/j.carbpol.2017.02.084

Abstract

Green polyelectrolytes including chitosan (CS), phytic acid (PA) and oxidized sodium alginate (OSA) were deposited on polyamide 66 (PA66) fabrics in a quadralayer (QL) fashion like (CS-PA-CS-OSA)_n (where "n" denotes the number of quadra layers) via layer-by-layer (LbL) assembly to improve the flame retardant property. In the vertical burning test, the PA66 fabric with 10 and 15 QL depositions could stop the melt-dripping. Cone calorimetry results showed that a maximum reduction (24%) in the peak heat release rate was achieved for the PA66 fabric with 5 QL depositions. Thermogravimetric analysis indicated that the presence of the polyelectrolytes catalyzed the degradation pathway of virgin PA66 fabric where the initial decomposition temperature was reduced and the char yield was enhanced for all the coated fabrics significantly. Moreover, UV-vis spectroscopy demonstrated that the use of OSA could improve the durability of such a multilayered nanocoating.

Keywords: Chitosan; Flame retardancy; Layer-by-layer assembly; Oxidized sodium alginate; Phytic acid.