ساخت و شناسايي پلي ﴿آميد-ايميد﴾ هاي فعال نوري نانو ساختار و بيونانو كامپوزيت هاي حاوي نانو لوله هاي كربني چند ديواره ي عامل دار شده با آمينو اسيد

چكيده انگليسي :

177 Poly amid imide Multi walled carbon nanotube Bionanocomposite Amino acid Microwave irradiation Functionalization Synthesis and characterization of optically active nanostructured poly amide imide s and bionanocomposites containing amino acid functionalized multi walled carbon nanotubes Amin Zadehnazari aminnazari @yahoo com aminnazari @gmail com a zadehnazari@ch iut ac ir September Department of Chemistry Isfahan University of Technology Isfahan I R Iran Supervisor Prof Shadpour Mallakpour Email mallak@cc iut ac ir mallak @yahoo com mallakpour @alumni ufl edu Advisor Dr Kazem Karami Department Graduate Coordinator Assos Prof H Tavakol Isfahan University of Technology Isfahan Iran Abstract In this research at first a series of chiral nanostructured poly amide imide s PAI s were prepared by direct step growth polymerization reaction in a molten ionic salt tetrabutylammonium bromide and triphenyl phosphite as the condensing agent Polymerization reactions were carried out by classical heating method and under microwave irradiation The PAIs were characterized using Fourier transform infrared spectroscopy specific rotation measurements powder X ray diffraction field emission scanning electron microscopy thermogravimetric analysis elemental analysis and H nuclear magnetic resonance technique In the next section of the oroject nanocomposites NC s of carboxyl functionalized multi walled carbon nanotubes MWCNTs COOH which reinforced PAI have been created via a simple solution casting technique The thermal stability of the NCs was improved due to the better interfacial interaction and good dispersion between the polymer matrix and modified CNTs After this section functionalization of MWCNTs with S valine amino acid was performed using microwave irradiation Surface functionality groups and morphology of MWCNTs were analyzed by several techniques Then functionalized MWCNTs f MWCNTs were dispersed throughout a PAI Through casting of these dispersions f MWCNT PAI bionanocomposite BNC films were successfully fabricated and showed no signs of macroscopic aggregation The PAI and the BNCs were characterized by the aforementioned techniques Keyword Nanostructured polymer Multi walled carbon nanotube Amino acid Functionalization Transmission electron microscopy Introduction Nanocomposites NC s are one of the most diverse materials owing to their ability to incorporate a number of different filler materials Due to unprecedented improvement observed in the properties of the NCs research interest in this area has grown exponentially in recent years The most commonly used filler materials for polymer matrix NCs are carbon nanotubes CNT s Individually CNTs have extreme mechanical electrical and thermal properties CNTs have attracted interest as reinforcing fillers because of their high strength Young s modulus thermal stability electrical conductivity along the axial direction high aspect ratio and low density Recently there has been an increasing attention in the studies of CNT polymer composites due to the unique combination of promising properties and construction of multifunctional structures of each component These composites exhibit potentially superior the thermal electrical and mechanical properties than the pristine polymers Applications range from electronicsPDF created with pdfFactory trial version www pdffactory com

زاده نظري، امين

ساخت و شناسايي پلي ﴿آميد-ايميد﴾ هاي فعال نوري نانو ساختار و بيونانو كامپوزيت هاي حاوي نانو لوله هاي كربني چند ديواره ي عامل دار شده با آمينو اسيد

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