Anhydrous proton conductor consisting of pectin-inorganic composite material

作者：Yamada Masanori^*; Ogino Takahiro

来源：Journal of Applied Polymer Science, 2015, 132(34): 42433.

DOI：10.1002/app.42433

• bioengineering
• composites
• conducting polymers
• electrochemistry
• polysaccharides

An organic-inorganic proton conductive composite material consisting of a biopolymer was prepared by mixing the pectin, tetraethyl titanate, and imidazole. Although the pectin material without the composite dissolved in water, the pectin-inorganic composite material did not show water solubility. In addition, in the composite material, the pectin and imidazole formed an acid-base structure by an electrostatic interaction, and as a result, these composite materials showed a thermal stability at intermediate temperatures (100-200 degrees C). Furthermore, these composite materials indicated the proton conductivity of 5.6 x 10(-4) S cm(-1) at 180 degrees C under anhydrous conditions. The activation energy of the proton conduction under anhydrous conditions was 0.32-0.22 eV and these values were one order of magnitude higher than that of the typical humidified perfluorinated membrane, such as Nafion((R)). The organic-inorganic composite material consisting of a biocomponent may have the potential to be utilized as a novel proton conductor under anhydrous conditions.

• 出版日期2015-9-10