Flame retardant systems based on bio-sourced products combine quite high fire performances with the low environmental impact related to their synthesis and exploitation. In this context, this work describes a new all bio-sourced flame retardant system designed and applied to cotton fabrics. In particular, it consists of phytic acid (PA), a phosphorus-based naturally occurring molecule extracted from dierent plant tissues, in combination with biochar (BC), a carbon-rich solid product obtained from the thermo-chemical conversion of biomasses in an oxygen-limited environment. PA and BC were mixed together at a 1:1 weight ratio in an aqueous medium, and applied to cotton at dierent loadings. As revealed by flammability and forced combustion tests, this bio-sourced system was able to provide significant improvements in flame retardance of cotton, even limiting the final dry add-on on the treated fabrics at 8 wt.% only. The so-treated fabrics were capable to achieve self-extinction in both horizontal and vertical flame spread tests; besides, they did not ignite under the exposure to 35 kW/m2 irradiative heat flux. Conversely, the proposed flame retardant treatment did not show a high washing fastness, though the washed flame retarded fabrics still exhibited a better flame retardant behavior than untreated cotton.
Phytic acid and biochar: an effective all bio-sourced flame retardant formulation for cotton fabrics / BARBALINI, MARCO; BARTOLI, MATTIA; TAGLIAFERRO, Alberto; MALUCELLI, GIULIO. - In: POLYMERS. - ISSN 2073-4360. - ELETTRONICO. - 12:811(2020).
|Titolo:||Phytic acid and biochar: an effective all bio-sourced flame retardant formulation for cotton fabrics|
|Data di pubblicazione:||2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/polym12040811|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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