N.U. Ahamad, S.U. Ahamed, M.M. Alam, M. Al-Mamun
Shahjalal University of Science and Technology,
Keywords: modified MWCNTs, PS, APTMS, fire-retardent, composite, textiles
Summary:In this report, we have fabricated surface modified multiwall carbon nanotubes (mMWCNTs)- polystyrene (PS) composite to study its thermal stability and flammability. The purpose of this research is to explore the effect of incorporation of silicon (Si) and iron oxide (Fe3O4) with CNTs in enhancing fire-retardant property of PS. Prior to surface modification, MWCNTs were oxidized to facilitate attachment of silicon atoms and iron oxide nanoparticles (IO). Oxidation and subsequent functionalization of MWCNTs were monitored by FT-IR, Raman and SEM-EDS techniques. It was found that oxidation did not change the morphology of CNTs. Composite film was formed by drop casting of solvent containing mMWCNTs and IO. It was found that Si modified CNTs dispersed well in PS matrix but naked IOs segregated in the film. So, for better dispersion, IO nanoparticles were modified with polyvinyl pyrolidone (PVP) before attaching them with CNTs. Formation of composite film was characterized by FT-IR, UV-vis and TEM as well as optical image. Thermal stability and flammability of the as prepared composite will be studied by TGA and DSC. It is expected that modified CNTs-PS will exhibit better thermal stability than CNTs/PS or PS itself. The outcome of this study will be employed to develop fire retardant textiles with improved thermal stability and flammability.