Flame Retardancy of Polyester and Polyester–Cotton Blends Treated with Caseins

Abstract

For the first time, polyester and polyester−cotton fabrics have been treated with an aqueous suspension of caseins to increase their thermal stability and flame retardancy. The effectiveness of the fabric treatment as well as the morphology of the deposited coatings have been assessed by infrared spectroscopy and scanning electron microscopy, respectively. The thermal stability of the treated fabrics in nitrogen and air, as well as their resistance to a flame application and to an irradiative heat flux of 35 kW/m 2 , has proven to be strongly affected by caseins. Indeed, in the case of polyester, a remarkable decrease of the burning rate (−70%) and a significant increase of its limiting oxygen index (from 21 to 26%) has been reached. In the case of polyester− cotton blends, caseins turned out to slow down the fabric burning rate (about −40%) and its resistance to an irradiative flux as assessed by cone calorimetry.

Flame resistant cellulosic substrate using banana pseudostem sap

“…In this regard, it is worth mentioning that a recent study has reported a realisation of 10.5 g inorganic salts from the evaporation of 500 ml of aqueous ash extract collected by burning the air-dried banana pseudostem. The researchers have also reported that potassium chloride, sodium chloride and metal phosphate are the major composition of that salt 13 , and magnesium nitrate and potassium nitrate are the two major active components present in the BPS as confi rmed by GC-MS analysis, and those can also act as fi re retardant 15 . In the present study, the BPS has helped the cotton textile not only to be fl ame retardant, but also to form some sort of complex groups with the mordants that might have also aided the sample to be better fl ame retardant, resulting in high uptake of the BPS in the pre-mordanted fabric.…”

Thermal Stability Enhancement of Cotton and Cotton Polyester Blend Fabrics by Hyperbranched Poly Urethane-Urea Treatment

“…In case of CO/PET fabrics, the following observations were detected; all samples showed two independent stages of thermal decomposition, the first stage (at lower temperature) is due to the CO fiber degradation while the later stage (at higher temperature) is due to the decomposition of polyester fiber [1,22]. Also, T max1 and T o1 values decrease as HBPU concentration increases during treatment process.…”

Green coconut shell extract and boric acid: new formulation for making thermally stable cellulosic paper

“…Recently, researchers reported that DNA from herring sperm and solomon fishes can be applied to cotton fabric to make it thermally stable . Attempts have also been made to make cotton fabrics fire retardant using whey proteins, casein and hydrophobins due to their phosphate, disulphide and protein content, as they can influence pyrolysis by early char formation . Recently researchers have used chicken feather protein with a combination of borax and boric acid to make woven cotton fabric fire retardant .…”