Fireproofing Jute

The Journal of The Textile Institute

Samanta

Chattopadhyay

2014

Flame retardant functionality was imparted in cellulosic textile using spinach leaves juice (SJ), an eco-friendly natural product. The extracted juice was made alkaline and applied in fresh bleached and mercerized cotton fabrics. Flame retardant properties of the control and treated fabrics were analysed in terms of limiting oxygen index (LOI), horizontal and vertical flammability and radiant heat testing. The study showed that the treated fabrics had good flame retardant property compared to control fabrics. The LOI value was found to increase by 1.6 times after application of SJ. As a result of this, the fabric does not catch flame. In horizontal flammability, the treated fabric showed burning with afterglow (without presence of flame) with a propagation rate of 10 mm/min, which is almost nine times lower than the control fabric. The thermal degradation and pyrolysis was studied using thermogravimetric analysis. The chemical composition of the control and SJ-treated cellulosic fabric were analysed by FTIR, SEM and EDX. Durability of the flame retardant functionality to soap washing and weathering had also been studied. After application of SJ, cellulosic fabric sample produced natural green colour. There was no significant change in other physical properties.

Section: Wash Durabilitymentioning

confidence: 99%

Fire retardant property of cotton fabric treated with herbal extract

The Journal of The Textile Institute

Samanta

Chattopadhyay

2014

“…In most cases of application of conventional and commercial fl ame retardant fi nishes, there occured a signifi cant loss of tensile strength, in the range of 10-30% 28 . The K/S (depth of colour) changed from 0.04 for the control to 0.80 for the 1: 2 BPS treated samples.…”

Section: Wash Durabilitymentioning

confidence: 99%

Flame resistant cellulosic substrate using banana pseudostem sap

Polish Journal of Chemical Technology

Samanta

Saxena

et al. 2015

Flame retardancy was imparted in cellulosic cotton textile using banana pseudostem sap (BPS), an eco-friendly natural product. The extracted sap was made alkaline and applied in pre-mordanted bleached and mercerized cotton fabrics. Flame retardant properties of both the control and the treated fabrics were analysed in terms of limiting oxygen index (LOI), horizontal and vertical fl ammability. Fabrics treated with the non-diluted BPS were found to have good fl ame retardant property with LOI of 30 compared to the control fabric with LOI of 18, i.e., an increase of 1.6 times. In the vertical fl ammability test, the BPS treated fabric showed fl ame for a few seconds and then, got extinguished. In the horizontal fl ammability test, the treated fabric showed no fl ame, but was burning only with an afterglow with a propagation rate of 7.5 mm/min, which was almost 10 times lower than that noted with the control fabric. The thermal degradation and the pyrolysis of the fabric samples were studied using a thermogravimetric analysis (TGA), and the chemical composition by FTIR, SEM and EDX, besides the pure BPS being characterized by EDX and mass spectroscopy. The fabric after the treatment was found to produce stable natural khaki colour, and there was no signifi cant degradation in mechanical strengths. Based on the results, the mechanism of imparting fl ame retardancy to cellulosic textile and the formation of natural colour on it using the proposed BPS treatment have been postulated.

“…Most of the conventional flame retardant finishes cause a high loss of tensile strength in the range of 10-30% [25]. As indicated in the earlier literature, after application of alkaline BPS in the pre-mordanted cotton fabric, the sample changed its colour from white to khaki [13].…”

Section: Physical Properties and Colour Parametersmentioning

confidence: 88%

Banana pseudostem sap: A waste plant resource for making thermally stable cellulosic substrate

Journal of Industrial Textiles

Saxena

Chattopadhyay

et al. 2016

The flame retardant functionality was imparted in cellulosic textile using banana pseudostem sap, an eco-friendly waste plant product. The extracted sap was applied in three different pH conditions, viz. acidic, neutral and alkaline to the pre-mordanted bleached and mercerized cotton fabrics. Flame retardant characteristics of both the control and the treated fabrics were analysed in terms of limiting oxygen index, vertical flammability and heat release related properties using a cone calorimeter. The thermal degradation and pyrolysis mechanism were studied using thermogravimetric analysis and differential scanning calorimetry. The elemental analysis was carried out with X-ray fluorescence, and the quantification of phosphorus and nitrogen was also done. Besides, the charring mechanism of both the control and the treated fabric was analysed in detail, and a char structure model has been proposed. The treated fabrics were also evaluated in terms of colour and other physical properties.