Effect of relative humidity on mechanical strength of zirconia/ Nafion® nano-composite membrane

Sigwadi, R.; Nemavhola, F.; Dhlamini, MS.; Mokrani, T.

doi:10.22061/jcarme.2017.2484.1239

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	Effect of relative humidity on mechanical strength of zirconia/ Nafion® nano-composite membrane
Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقاله 4، دوره 7، شماره 2 - شماره پیاپی 14، فروردین 2018، صفحه 175-187 اصل مقاله (4.36 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2017.2484.1239
نویسندگان
R. Sigwadi¹؛ F. Nemavhola^* ²؛ MS. Dhlamini³؛ T. Mokrani¹
¹Department of Chemical Engineering, University of South Africa, Private Bag X6, Florida, 1710, South Africa
²Department of Mechanical and Industrial Engineering, University of South Africa, Private Bag X6, Florida, 1710, South Africa
³Department of Physics, University of South Africa, Private Bag X6, Florida, 1710, South Africa
تاریخ دریافت: 31 فروردین 1396، تاریخ بازنگری: 31 خرداد 1396، تاریخ پذیرش: 01 شهریور 1396
چکیده
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.
کلیدواژه‌ها
Tensile strength؛ Stiffness of nano membrane؛ Nano-composite؛ Relative humidity

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Effect of relative humidity on mechanical strength of zirconia/ Nafion® nano-composite membrane