Effect of relative humidity on mechanical strength of zirconia/ Nafion®Nano-composite membrane
سال انتشار: 1397
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 233
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شناسه ملی سند علمی:
JR_JCARME-7-2_004
تاریخ نمایه سازی: 20 آبان 1397
چکیده مقاله:
This paper presents the results of mechanical strength of wet and dry zirconia/ Nafion® nano-composite membrane. The tensile tests were conducted to determine elastic modulus and stiffness of dry and wet pristine Nafion® membrane and modified Nafion® membrane. The composite membranes were prepared by recast method of different synthesized zirconium oxide with the zirconia content of 10% by weight. The uniaxial mechanical properties of nano-composite membranes and recast Nafion® membrane were captured using a CellScale UStretch uniaxial testing system. The length, width, and thickness of samples were measured using a Vernier caliper and recorded prior to testing. It was found that elastic modulus of the wet Nafion recast is 62.06 %, 35.26 %, 30.79 % and 35.26 % higher than that of Nafion®/ Zr-100, Nafion/® Zr-80, Nafion®/Zr-50, and Nafion®/Zr-0, respectively. The elastic modulus of dry Nafion recast, Nafion®/Zr-100, Nafion®/Zr-80, Nafion®/Zr-50, and Nafion/Zr-0 membranes are 46.29 %,83.31 %, 64.81 %, 59.84 %, and 78.36 % higher than those of wet Nafion® recast, Nafion®/Zr-100, Nafion®/Zr-80, Nafion®/Zr-50, and Nafion®/Zr-0 membranes, respectively. Furthermore, the results showed that when the water content increases in the nano-composite membranes the mechanical strength also decreases.
کلیدواژه ها:
نویسندگان
R Sigwadi
Department of Chemical Engineering, University of South Africa, Private Bag X۶, Florida, ۱۷۱۰, South Africa
F Ṋemavhola
Department of Mechanical and Industrial Engineering, University of South Africa, Private Bag X۶, Florida, ۱۷۱۰, South Africa
MS Dhlamini
Department of Physics, University of South Africa, Private Bag X۶, Florida, ۱۷۱۰, South Africa
T Mokrani
Department of Chemical Engineering, University of South Africa, Private Bag X۶, Florida, ۱۷۱۰, South Africa