Macro and micro thermal investigation of nanoarchitectonics-based coatings on cotton fabric using new quaternized starch

Abstract

Implementation of a new cationizing reagent and its incorporation onto the backbone of starch was performed successfully, confirmed from the remarkable micro- and macro anti-flammable properties. The morphologies and localized compositional analysis of the modified starch-based LBL coatings on the cotton surface were carried out using LV-SEM and EDX: highly uniform coating layers and uptake of solution species for intermediate implant reagent concentrations were confirmed. The subject samples were further analyzed through thermogravimetric analysis (TGA), microcombustion experiments (MCC), flame testing (VFT) and afterburn measurements. The peak range of the degradation was highly improved from the lower range to the higher range (329.92-394.48 degrees C), together with significant mass residue for TBAB-0.7-17.02%. Moreover, a significant decrease in the absolute heat loss (THR similar to 30%), heat dissipation competence (HRC similar to 27.86%), and peak heat output (PHRR similar to 23%) was achieved for a TBAB loading of similar to 0.7 g. The results were further confirmed from the increase in the limiting oxygen index (LOI) to a higher rate of similar to 23.2, improved structural integrity and higher quality of char obtained in the VFT and after-burn analysis.