Department of Chemical Engineering, Laval University, Quebec, QC, Canada.
J Phys Chem B. 2011 Mar 31;115(12):2916-23. doi: 10.1021/jp109858d. Epub 2011 Mar 10.
Fuel cells are at the battlefront to find alternate sources of energy to the highly polluting, economically and environmentally constraining fossil fuels. This work uses an organosilicon molecule presenting two amine functions, bis(3-aminopropyl)-tetramethyldisiloxane (APTMDS) with the aim of preparing cross-linked sulfonated poly(ether ether ketone) (SPEEK) based membranes. The hybrid membranes obtained at varying APTMDS loadings are characterized for their acid, proton conductivity, water uptake, and swelling properties. APTMDS may be considered as an extreme case of silica nanoparticle and is therefore most advantageously distributed within the polymeric matrix. The two amine groups can interact, via electrostatic interactions, with the sulfonic acid groups of SPEEK, resulting in a double anchoring of the molecule. The addition of a small amount of APTMDS is enhancing the mechanical and hydrolytic properties of the membranes and allows some unfolding of the polymer chains, rendering some acid sites accessible to water molecules and thus available for proton transport.
燃料电池在寻找替代能源方面处于前沿，以取代高度污染、经济和环境受限的化石燃料。这项工作使用了一种有机硅分子，该分子具有两个胺官能团，双(3-氨丙基)-四甲基二硅氧烷(APTMDS)，旨在制备交联磺化聚(醚醚酮)(SPEEK)基膜。在不同 APTMDS 负载下获得的混合膜的酸、质子电导率、吸水率和溶胀性能进行了表征。APTMDS 可以被认为是二氧化硅纳米粒子的极端情况，因此最有利于分布在聚合物基质中。两个胺基团可以通过静电相互作用与 SPEEK 的磺酸基团相互作用，从而使分子得到双重固定。少量 APTMDS 的添加可以提高膜的机械和水解性能，并允许聚合物链的一些展开，使一些酸位可与水分子接触，从而可用于质子传输。
