نتایج جستجو برای: polyacrylonitrile pan
تعداد نتایج: 28817 فیلتر نتایج به سال:
This paper reviews the research and development activities conducted over the past few decades on carbon fibers. The two most important precursors in the carbon fiber industry are polyacrylonitrile (PAN) and mesophase pitch (MP). The structure and composition of the precursor affect the properties of the resultant carbon fibers significantly. Although the essential processes for carbon fiber pr...
Carbon nanofibers (CNFs) have been used in many applications such as sensors, energy storage and biomedical owing to high electronic conductivity chemical stability of CNFs. Performance carbon are influenced by the physical properties nanofibers. Furthermore, morphology, porosity specific surface area important for several including sensors. There techniques produce vapor deposition, catalytic ...
The nanofiber membranes prepared by electrospinning method attracted the attention of researchers in field pollutant treatment due to their ease manufacture, efficient performance and removal. Some these lack possibility reuse low efficiency high regeneration cost. In this paper, we were able prepare from polyacrylonitrile (PAN) PAN/TiO2 adding different ratios (5,10 15) wt% TiO2 respectively. ...
Carbon fibers (CFs) are promising lightweight materials to reduce vehicle fuel consumption. However, the most widely used polyacrylonitrile (PAN)-based CF production process consumes a considerable amount of energy. A novel for CFs from aromatic polymers (APs) is proposed as an alternative. In this study, greenhouse gas (GHG) emissions PAN-based CFs, APs using classical benzidine method, and co...
Ionic liquid, as a green solvent, has been widely used in high-tech fields. One of the uses is an excellent plasticizer for polymers, and good plasticizing effect can be achieved these polymers. 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) kind ionic it possesses low melting point, strong polarity, high temperature stability, other characteristics, which highly effective polyacrylonitrile (P...
Carbon fibres show great potential as multifunctional negative electrode for novel structural battery composites – a rechargeable electrochemical cell with function. The performance of carbon materials can be enhanced nitrogen heteroatoms, which conveniently are inherent in polyacrylonitrile (PAN)-based fibres. However, it is not fully understood how the governed by microstructure and compositi...
Food safety is a crucial issue; all countries have struggled against pesticides for years. In this study, Polypyrrole (PPy)- and Polyacrylonitrile (PAN)-based non-enzymatic electrochemical sensors were investigated to detect the pesticide propamocarb (PM) in food samples. Under experimental conditions, proposed strategy exhibited high selectivity of disposable PPy-based PAN-based determination ...
Porous carbon nano/microfibres (PCFs) modified by NiCoP nanoparticles (NiCoP/CF) were tested as gas diffusion cathodes in a zero-gap alkaline water electrolyser. Two types of precursors used for the preparation fibres needle-less spinning: polyacrylonitrile (PAN) and combination PAN polyvinylpyrrolidone (PVP). The influence selected on morphology, porosity, surface area was examined. Both sampl...
Abstract A binder-free porous NiCu(CO 3 )(OH) 2 composite was grown on a polyacrylonitrile (PAN) nanofiber substrate using hydrothermal method. PAN nanofibers were fabricated by the electrospinning method, thus producing with nano-sized diameter and high specific surface area. The nanowires provided large area required for redox reaction. Transition metal-based substrates indicate synergistic e...
Polyacrylonitrile (PAN) nanofiber membranes of varied thicknesses (20–100 µm) were electrospun at a polymer concentration 14% (w/v) in N,N-Dimethylformamide (DMF); characterized for porosity, pressure drop, air permeability and particle filtration efficiency (PFE). Densities are found very less (0.11 to 0.21 g/cm3), with porosities the range 80–92%, higher porosity was thickness. Membranes used...
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