Proton conducting sulfon:sulfonamide functionalized materials based on inorganic-organic matrices
Proton conducting sulfon:sulfonamide functionalized materials based on inorganic-organic matrices
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DOI：
10.1016/s0013-4686(99)00346-1
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发表时间：
2000-01
影响因子：
6.6
通讯作者：
L. Depre;M. Ingram;C. Poinsignon;M. Popall
中科院分区：
文献类型：
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作者：
L. Depre;M. Ingram;C. Poinsignon;M. Popall
最近，通过溶胶-凝胶法将磺酸基和磺酰胺基接枝到无机网络上，开发出一类新型无机-有机质子聚合物电解质。它将二氧化硅骨架的机械和耐热性与接枝到二氧化硅网络的有机链诱导的化学反应性相关联。有机链是带有磺酸基和磺酰胺基的弱酸性质子导体。烷氧基硅烷的缩聚提供无机二氧化硅主链，而有机网络由R′Si（OR）3型烷氧基硅烷的反应性官能团R′形成，或通过反应性有机单体与官能化烷氧基硅烷的共聚形成。树脂的合成通过有机交联反应（热固化或UV固化）完成。质子通过固体的传输可以被描述为在干燥材料的情况下质子从供体（磺酸基）转移到合适放置的受体（例如磺酰胺基）的机制。还研究了电导率作为相对湿度（r.h.）(wet质子导体）。在这里，质子运输可以被描述为一种载体机制，其中质子骑在载体分子（H3 O+）上。此外，电导率对温度的依赖性遵循VTF行为。通过将膜的水含量增加到16质量%，在70°C下电导率从10− 4增加到6×10−2S cm− 1。这些材料将被开发用于薄膜电池。它们的机械性能，热稳定性和玻璃化转变温度进行了讨论与电导率的结果。
A new class of inorganic–organic protonic polymer electrolyte was developed recently by grafting sulfonic and sulfonamide groups to the inorganic network by the sol–gel route. It associates the mechanical and thermal resistance of the silica backbone to the chemical reactivity induced by the organic chains grafted to the silica network. The organic chains are slightly acidic proton conductors bearing sulfonic and sulfonamide groups. The polycondensation of alkoxysilanes provides the inorganic silica backbone whereas the organic network is formed from reactive functional groups R′ of alkoxysilanes of the type R′Si(OR)3, or by copolymerization of reactive organic monomers with functionalized alkoxysilanes. The synthesis of the resins is completed by organic crosslinking reactions (thermal or UV-curing). The transport of the protons through the solid could be described as a mechanism in which the proton was transferred from a donor (sulfonic group) to a suitable placed acceptor (e.g. sulfonamide group) in the case of a dry material. The conductivity was also studied as a function of relative humidity (r.h.) (wet proton conductors). Here, the proton transport could be described as a vehicular mechanism where the proton rides on a carrier molecule (H3O+). Furthermore the conductivity dependence on temperature follows a VTF behavior. By increasing the water content of the membranes up to 16 mass%, the conductivity increases from 10−4to 6×10−2S cm−1at 70°C. These materials will be developed for thin film batteries. Their mechanical properties, thermal stability and glass transition temperature are discussed in connection with the conductivity results.