The Influence of Adding Polyurethane and Silica Nanoparticles on Conductivity Properties of Sulfonated Polyethersulfone Membrane

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Khosravi Yasamin; Hassanajili Shadi; Moslemin Mohammad Hosein; Tabatabaei Masumeh

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Journal: Iranian Journal of Polymer Science and Technology Year:2019 | Volume:32 | Issue:4 Page(s): 349-365

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Title

The Influence of Adding Polyurethane and Silica Nanoparticles on Conductivity Properties of Sulfonated Polyethersulfone Membrane

Author(s)

Khosravi Yasamin | Hassanajili Shadi | Moslemin Mohammad Hosein | Tabatabaei Masumeh | Issue Writer Certificate

Keywords

membraneQ2

direct methanol fuel cellQ1

sulfonated polyethersulfoneQ1

polyurethaneQ3

silica nanoparticlesQ1

Abstract

Hypothesis: In recent years, with the shortage of conventional energy resources, there has been a great advancement in the study of fuel cells particularly hydrogen-methanol types as an important energy alternative. One of the main components in such fuel cells is an electrolyte membrane whose main function is to carry protons and capture methanol. The electrolyte membrane must have a high chemical and electrochemical stability plus mechanical resistance. In addition, high proton conductivity is required to support better fuel cell performance. Methods: In this research, novel nanocomposite membranes were prepared as electrolyte for application in fuel cells. For this purpose, two types of membranes, including sulfonated polyethersulfone (SPES) and its blend with polyurethane (PU), were chosen as base membranes. At first, polyethersulfone was sulfonated by using sulfonic acid and blended with PU. Then, silica nanoparticles with different percentages (3, 5, and 8 wt%) were added to blend membrane (SPES/PU/SiO2). The prepared membranes properties were studied by Fourier transform spectroscopy (FTIR), X-ray diffraction analysis, thermogravimetry (TGA), water and methanol uptake test, proton conductivity test and scanning electron microscopy (SEM). Findings: The results suggested that there was a proper distribution of PU into the prepared membrane through forming hydrogen bonds between polar groups of SEPS and PU. Hence, by the mechanism of increasing polarity, the conductivity in SPES/PU blend membrane was increased (74%), comparing to its pure samples without intense increase in water and ethanol uptake. Additionally, by adding the silica nanoparticles to a SEPS/PU blend membrane and forming SPES/PU/SiO2 nanocomposite membrane, these particles formed a higher adhesion between the phases by forming covalent bonds with sulfonic acid groups of SPES and forming hydrogen bond with polar groups of PU and SPES. As a result, the morphology was modified by the mechanism of decreasing cavities and voidages. Finally, the conductivity of SPEC/PU/SiO2 nanocomposite membrane compared to that of the SPES pure sample increased by 53. 13% only by an increase of 11% and 8% in water and methanol uptake, respectively.

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APA: Copy

Khosravi, Yasamin, Hassanajili, Shadi, Moslemin, Mohammad Hosein, & Tabatabaei, Masumeh. (2019). The Influence of Adding Polyurethane and Silica Nanoparticles on Conductivity Properties of Sulfonated Polyethersulfone Membrane. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 32(4 ), 349-365. SID. https://sid.ir/paper/6136/en

Vancouver: Copy

Khosravi Yasamin, Hassanajili Shadi, Moslemin Mohammad Hosein, Tabatabaei Masumeh. The Influence of Adding Polyurethane and Silica Nanoparticles on Conductivity Properties of Sulfonated Polyethersulfone Membrane. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2019;32(4 ):349-365. Available from: https://sid.ir/paper/6136/en

IEEE: Copy

Yasamin Khosravi, Shadi Hassanajili, Mohammad Hosein Moslemin, and Masumeh Tabatabaei, “The Influence of Adding Polyurethane and Silica Nanoparticles on Conductivity Properties of Sulfonated Polyethersulfone Membrane,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 32, no. 4 , pp. 349–365, 2019, [Online]. Available: https://sid.ir/paper/6136/en

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