Facile Route for Synthesis of Novel Flame Retardant, Reinforcement and Antibacterial Textile Fabrics Coatings

Abstract

New and innovative textile fabrics coatings were facilely developed. The coating was developed based on synthesis of novel charring and antibacterial organic agent in conjunction with chitosan. N-[2,3-dibromo-4-(4-methoxy-3-methylphenyl)-4-oxobutanoyl]anthranilic acid was synthesized as organic antibacterial, reinforcement, and charring agent (OA) and then, dispersed in chitosan solution followed by coating on textile fabrics using immersion route forming new flame retardant coating layer. The developed organic molecule structure was elucidated using spectroscopic techniques. The mass loadings of developed organic agent dispersed in chitosan solution were varied between 20–60 wt.%. The coated textile fabrics have special surface morphology of fiber shape aligned on textile fibers surface. The thermal stability and charring residues of the coated textile fabrics were enhanced when compared to blank and organic agent free coated samples. Furthermore, the flammability properties were evaluated using LOI (limiting oxygen index) and UL94 tests. Therefore, the coated textile fabrics record significant enhancement in flame retardancy achieving first class flame retardant textile of zero mm/min rate of burning and 23.8% of LOI value compared to 118 mm/min. rate of burning and 18.2% for blank textile, respectively. The tensile strength of the coated textile fabrics was enhanced, achieving 51% improvement as compared to blank sample. Additionally, the developed coating layer significantly inhibited the bacterial growth, recording 18 mm of clear inhibition zone for coated sample when compared to zero for blank and chitosan coated ones.

Chitosan and nano-TiO2 coating improves the flame retardancy of dyed and undyed denim fabrics by increasing the charring

“…During combustion, chitosan creates a cooling mechanism on the fabric surface thanks to the nitrogen in its structure. 20,25 Likewise, TiO 2 nanoparticles can catalyze the carbonization process by forming a thermal protective layer that acts as an insulator on the chitosan coating surfaces. 19 Thus, the application of TiO 2 nanoparticles together with chitosan reduces the mass loss of the fabric sample.…”

“…In another study, the wood samples coated with chitosan/sodium phytate/TiO 2- ZnO composite underwent severe pyrolysis at a lower temperature (250–400°C) than the uncoated one and had the highest residual amount. 25…”

“…In another study, the wood samples coated with chitosan/sodium phytate/TiO 2-ZnO composite underwent severe pyrolysis at a lower temperature (250-400°C) than the uncoated one and had the highest residual amount. 25 The chitosan coating did not have a significant effect on the burning performance of the green dyed calico fabric (13.6% residue).Therefore, it is obvious that the structural properties of the fabrics also have an effect on the results (denim fabric 368 g/m 2 and calico fabric 105 gr/m 2 ).Furthermore, the structural properties of the fabric were also affected by the dying process applied before coating. The degradation rates of the dyed and undyed denim fabrics with the same structural features are close to each other when they are uncoated, different from when they are coated with chitosan (Figure 8).…”

“…derivatives have been used. 24 Attia et al 25 developed the organic compound N-[2,3-dibromo-4-(4-methoxy-3-methylphenyl)-4-oxobutanoyl]anthranilic acid as antibacterial, flame retardant/charcoaling and reinforcing agent and combined it with chitosan. Zhou and Fu 18 obtained chitosan-based composite by doping chitosan with sodium phytate and nano-TiO 2 -ZnO particles to provide flame retardancy.…”

Synthesis and Reactions of Some Novel 4H-3,1-Benzoxazinone Bearing Chalcone Moiety with Antibacterial Evaluation

“…The reaction mixture was stirred at room temperature for 2 hrs then kept overnight. The resultant precipitate was filtered off, washed with diluted acetic acid and crystallized from acetic acid to give (3) as white crystals, (yield: 86% 21…”