Accession Number : ADA622125


Title :   Layer-by-Layer Assembly of Halogen-Free Polymeric Materials on Nylon/Cotton Blend for Flame Retardant Applications


Descriptive Note : Journal article


Corporate Author : MASSACHUSETTS UNIV LOWELL


Personal Author(s) : Narkhede, Mahesh ; Thota, Sammaiah ; Mosurkal, Ravi ; Muller, Wayne S ; Kumar, Jayant


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a622125.pdf


Report Date : Jul 2015


Pagination or Media Count : 17


Abstract : Thin films of environmentally safe, halogen free, anionic sodium phosphate and cationic polysiloxanes were deposited on a Nyco (1:1 nylon/cotton blend) fabric via layer-by-layer (LbL) assembly to reduce the inherent flammability of Nyco fabric. In the coating process, we used three different polysiloxane materials containing different amine groups including 35-45% (trimethylammoniummethylphenythyl)-methyl siloxane-55-65% dimethyl siloxane copolymer chloride salt (QMS-435), aminoethylaminopropyl silsesquioxane-methylsilsesquioxane copolymer oligomer (WSA-7021) and aminopropyl silesquioxane oligomers (WSA-991) as a positive polyelectrolyte. Thermo-gravimetric analysis showed that coated fabric has a char yield around 40% at 600 degrees C whereas control fabric is completely consumed. The vertical flame test (VFT) on the LbL-coated Nyco fabric was passed after a flame time of 2 s, with a char length of 3.81 cm. Volatile and nontoxic degradation products of flame retardant-coated fabric were analyzed by pyrolysis gas chromatography mass spectroscopy (Py-GCMS). Surface morphology of coated fabrics and burned fabric residues were studied by scanning electron microscopy.


Descriptors :   *COTTON , *FIRE RESISTANT MATERIALS , *NYLON , FABRICS , FIBERS , FLAMMABILITY , PHOSPHATES , REPRINTS , SCANNING ELECTRON MICROSCOPY , SILOXANES , THERMOGRAVIMETRIC ANALYSIS , WATER SOLUBLE MATERIALS


Subject Categories : Miscellaneous Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE