Siekierski Maciej, Mroczkowska-Szerszeń Maja, Letmanowski Rafał, Zabost Dariusz, Piszcz Michał, Dudek Lidia, Struzik Michał M, Winkowska-Struzik Magdalena, Cicha-Szot Renata, Dudek Magdalena
Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3 Str., 00-640 Warsaw, Poland.
Oil and Gas Institute-National Research Institute, Lubicz 25a Str., 31-503 Cracow, Poland.
Materials (Basel). 2020 Jul 6;13(13):3004. doi: 10.3390/ma13133004.
This paper is focused on the determination of the physicochemical properties of a composite inorganic-organic modified membrane. The electrical conductivity of a family of glassy protonic electrolytes defined by the general formula (PO)(SiO), where x/y is 3/7 are studied by Alternating Current electrochemical impedance spectroscopy (AC EIS) method. The reference glass was doped with polymeric additives-poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA), and additionally with a titanium-oxide-based filler. Special attention was paid to determination of the transport properties of the materials thus modified in relation to the charge transfer phenomena occurring within them. The electrical conductivities of the 'dry' material ranged from 10 to 10 S/cm, whereas for 'wet' samples the values were ~10 S/cm. The additives also modified the pore space of the samples. The pore distribution and specific surface of the modified glassy systems exhibited variation with changes in electrolyte chemical composition. The mechanical properties of the samples were also examined. The Young's modulus and Poisson's ratio were determined by the continuous wave technique (CWT). Based on analysis of the dispersion of the dielectric losses, it was found that the composite samples exhibit mixed-type proton mobility with contributions related to both the bulk of the material and the surface of the pore space.
本文聚焦于复合无机-有机改性膜物理化学性质的测定。通过交流电化学阻抗谱（AC EIS）方法研究了通式为(PO)(SiO)（其中x/y为3/7）的一类玻璃态质子电解质的电导率。参比玻璃掺杂了聚合物添加剂——聚环氧乙烷（PEO）和聚乙烯醇（PVA），此外还添加了钛氧化物基填料。特别关注所改性材料的传输性质与其中发生的电荷转移现象之间的关系。“干燥”材料的电导率范围为10至10 S/cm，而“湿润”样品的值约为10 S/cm。添加剂还改变了样品的孔隙空间。改性玻璃态体系的孔径分布和比表面积随电解质化学成分的变化而呈现出差异。还对样品的力学性能进行了检测。杨氏模量和泊松比通过连续波技术（CWT）测定。基于对介电损耗色散的分析，发现复合样品呈现出混合型质子迁移率，其与材料本体和孔隙空间表面均有关。
