توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱A Novel Nano–composite Polymer Membrane based on Crosslinked Electrospun PVA\TiO2 for Alkaline DMFCs
اطلاعات انتشار: سومین همایش پیل سوختی ایران، سال
تعداد صفحات: ۶
A series of nano–composite polymer membranes based on poly(vinyl alcohol)\ titanium oxide (PVA\TiO2) were prepared by electrospinning technique. Electrospinning is an easy method for preparing polymer membranes which are made up of ultrafine fibers with diameters in the range of few nanometers to submicrometers. Glutaraldehyde (GA) was used as a cross linking agent in order to improve chemical, thermal and mechanical stabilities. The crosslinked PVA\TiO2 nano–composite polymer membranes were characterized by using optical microscopy, scanning electron microscopy (SEM), electrochemical techniques and n electrochemical impedance spectroscopy. Results indicated that the thin nanocomposite polymers had good stability in alkaline solution at different temperatures under 80 oC. Samples investigations also demonstrated that the electrospinning technique is a powerful technique in order to control the thickness of the nano–fibers membranes and the porosity of membrane which are promising candidates in different applications such as DAFCs electrolyte, gas purification membrane, Electrolyzers membrane.<\div>

۲Effects of Amount of Glutaraldehyde on Behavior of Electrospun PVA\TiO2 Membrane for DEFC Applications
اطلاعات انتشار: چهارمین همایش پیل سوختی ایران، سال
تعداد صفحات: ۱۰
Nano–composite polymer membranes based on poly(vinyl alcohol)\ titanium oxide (PVA\TiO2) were prepared by electrospinning technique. Electrospinning is an efficient method for fabricating polymer membranes which are made up of ultrafine fibers with diameters in the range of few nanometers to sub– micrometers[1]. Glutaraldehyde (GA) was used as a cross–linking agent in order to improve chemical, thermal and dimentional stabilities. The properties of crosslinked electrospun membranes were characterized by scanning electron microscopy (SEM), calculation of water uptake (WU) and X–ray diffraction (XRD). The changes of ionic conductivities of membranes crosslinked with different amounts of GA were inspected by electrochemical impedance spectroscopy (EIS) method, when the membranes were placed in various alkaline solutions for 24 h. According to obtained results, these nanofibrous membranes are promising anion exchange polymer electrolytes for direct ethanol fuel cell (DEFC) applications.<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه