POLYACRYLATE-BASED FLAMEPROOF FIBRES MODIFIED THROUGH THE APPLICATION OF NANOTECHNOLOGIES AND PROCEDURE FOR THEIR PRODUCTION

摘要

Flameproof fibres based on cross-linked polyacrylate which can be obtained by cross- linking acrylic fibre which has optionally been previously dyed, alkaline hydrolysis of the cross-linked fibre, acid treatment of the fibre subjected to hydrolysis and optionally salification with a metal salt, characterised in that it comprises nanofillers or nanoparticles (having at least one nanometric dimension (100 nm)) of the lamellar, channel-shaped/tubular, needle-shaped or spherulitic/globular type or their mixtures incorporated in the fibre. In particular, among the natural or organically modified lamellar nanofillers use may be made of silicates and phyllosilicates, hectorites and fluorohectorites, saponites, hydrotalcites (aluminium and magnesium hydroxides), saponites, mica, phosphates (including in particular zirconium phosphate), boehmites and graphites. Channel-shaped/tubular or needle-shaped nanofillers comprise in particular nanotubes and nanofibres of carbon, halloysite (aluminium silicate nanotubes) and sepiolites, Nanoparticles of the spherical type having three nanometric dimensions such as silica and metal oxides (for example titania) and POSS (Polyhedral Oligomeric Silsesquioxanes) may also be used.