Effect of genipin crosslinked layer-by-layer self-assembled coating on the thermal stability, flammability and wash durability of cotton fabric

Ying Pan; Longxiang Liu; Yanping Zhang; Lei Song; Yuan Hu; Shudong Jiang; Hongting Zhao

doi:10.1016/j.carbpol.2018.11.037

Effect of genipin crosslinked layer-by-layer self-assembled coating on the thermal stability, flammability and wash durability of cotton fabric

Carbohydr Polym. 2019 Feb 15:206:396-402. doi: 10.1016/j.carbpol.2018.11.037. Epub 2018 Nov 13.

Authors

Ying Pan¹, Longxiang Liu², Yanping Zhang¹, Lei Song², Yuan Hu², Shudong Jiang³, Hongting Zhao⁴

Affiliations

¹ Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, 310018 Hangzhou, PR China.
² State Key Laboratory of Fire Science, University of Science and Technology of China, 230026 Hefei, PR China.
³ Department of Fire Protection Engineering, Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, 610000 Chengdu, PR China.
⁴ Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, 310018 Hangzhou, PR China. Electronic address: info-iem@hdu.edu.cn.

PMID: 30553338
DOI: 10.1016/j.carbpol.2018.11.037

Abstract

A crosslinked and flame retardant coating was fabricated by layer-by-layer self-assembly on cotton fabric. The coated fabric was treated using positively charged polyethylenimine (PEI) and negatively charged hypophosphorous acid-modified chitosan (HACH) with subsequent crosslinking with genipin. The thermal stability and flammability of the treated cotton fabric were investigated by thermogravimetric analysis (TGA), the horizontal flame test and microscale combustion calorimetry. TGA results showed that, in an air atmosphere, there was more char residue for the treated cotton fabrics than for the untreated cotton fabric. The cottons treated with a 10-bilayer coating (C-(PEI/HACH)10 and C-(PEI/HACH)10-crosslink) could extinguish the fire during the horizontal burning test. The peak heat release rate and total heat release rate of C-(PEI/HACH)10 were reduced by 73% and 80%, respectively, compared with those of the untreated one. At the same time, the genipin crosslinked PEI/HACH coating exhibited good wash durability and mechanical properites for the treated fabrics.

Keywords: Coating; Cotton fabric; Crosslink; Flame; Layer-by-layer self-assembly; Retardancy.