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Study of electrospun polycarbosilane (PCS) nanofibrous web by needle-less technique
Mukesh Kumar Sinha,Biswa Ranjan Das,Raghwesh Mishra,Ashok Ranjan,Anurag Srivastava,Arvind Kumar Saxena 한국의류학회 2014 Fashion and Textiles Vol.1 No.1
This study reports on the various functional characteristics of silicon carbide (SiC) nanofibrous web. The SiC nanofibrous web was spun by the electrospinning technique using Nano Spider (needle-less) machine. The as-spun nanofibrous web was cured to 180°C and subsequently, pyrolized at 1000°C under inert nitrogen (N2) atmosphere to convert into silicon carbide nanofibrous web. The various properties of SiC web is characterized by using FESEM, Thermal Analysis, X-ray Diffraction, Energy Dispersive Spectroscopy (EDX), Atomic Force Microscopy and Surface Profilomertry. FESEM microphotographs indicated the interconnected fibres leading to pores of prepared SiC Nanofibrous web. Deep rooted fibre surface porosity was revealed by AFM. The thermal behavior of as-spun, cured and pyrolized PCS webs are influenced by the heat treatment at different temperatures. The surface roughness changes with the heat treatment of PCS nanofibrous webs. The pyrolized web carries higher surface roughness as compared to as-spun and cured webs. The EDX plots indicated the presence of C and Si elements in pyrolized PCS nanofibrous web.
Preparation of Activated Carbon Fibers from Cost Effective Commercial Textile Grade Acrylic Fibers
Mekala Bikshapathi,Nishith Verma,Rohitashaw Kumar Singh,Harish Chandra Joshi,Anurag Srivastava 한국탄소학회 2011 Carbon Letters Vol.12 No.1
Activated carbon fibers (ACFs) were prepared from cost effective commercial textiles through stabilization, carbonization, and subsequently activation by carbon dioxide. ACFs were characterized for surface area and pore size distribution by physical adsorption of nitrogen at 77 K. ACFs were also examined for various surface characteristics by scanning electron microscopy, Fourier transform infrared spectroscopy, and CHNO elemental analyzer. The prepared ACFs exhibited good surface textural properties with well developed micro porous structure. With improvement in physical strength, the commercial textile grade acrylic precursor based ACFs developed in this study may have great utility as cost effective adsorbents in environmental remediation applications.