In the recent years, flammability of both synthetic and natural textiles has become a significant problem, creating a need for treatments to improve their flame resistant properties. Thin assemblies of polymer and clay, deposited onto cotton fibers in a layer-by-layer (LbL) fashion, were recently reported as a more environmentally- friendly flame retardant treatment. Colloidal silica is another inorganic additive known to reduce flammability and has been successfully incorporated into the LbL process. In the present study, colloidal silica-based assemblies were deposited onto cotton and PET fabrics via LbL assembly in an effort to reduce fabric flammability. LbL deposition consists of building multilayered thin films by consecutive adsorption of oppositely charged polyelectrolytes and/or nanoparticles onto a substrate. Each positive and negative pair is referred to as a bilayer (BL).
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