Novel nanocomposite membranes based on sulfonated mesoporous silica nanoparticles modified sulfonate
Novel nanocomposite membranes based on sulfonated mesoporous silica nanoparticles modified sulfonate
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DOI：
10.1016/j.memsci.2010.10.016
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Dan-Dan Liu-Dan;L. Geng;Yuqin Fu;Xin Dai;C. Lü
中科院分区：
文献类型：
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作者：
Dan-Dan Liu-Dan;L. Geng;Yuqin Fu;Xin Dai;C. Lü
以磺化介孔二氧化硅纳米颗粒（SMSNs）为无机填料，与磺化聚酰亚胺（SPIs）直接共混，制备了新型纳米复合质子交换膜。研究了复合膜的微观结构和性能。直径为50 ~ 300nm的SMSNs具有2.3nm左右的有序介孔。与SPI相比，磺化介孔二氧化硅的引入提高了纳米复合膜的热稳定性、吸水性和甲醇渗透性。SMSNs含量为3wt%的杂化膜吸水值最高，为54.2%，甲醇渗透率最低，为5.23×10−6cm2s−1。当SMSNs的含量大于3wt%时，由于SMSNs的聚集，两者的数值都略有下降。与Nafion 117相比，所有膜均表现出优异的质子导电性。当SMSNs掺入量为7wt%时，不同测试温度下膜样品的质子电导率最高，说明SMSNs的掺入也可以提高复合膜的质子电导率。
Novel nanocomposite proton exchange membranes were prepared by using sulfonated mesoporous silica nanoparticles (SMSNs) as inorganic fillers through direct blending with sulfonated polyimides (SPIs). The microstructure and properties of the resulting hybrid membranes were studied. The SMSNs with a diameter of 50–300nm exhibited the ordered mesopores of about 2.3nm. The introduction of sulfonated mesoporous silica improved the thermal stability, water uptake and methanol permeability of the resulting nanocomposite membranes as compared with SPI. The hybrid membrane with 3wt% SMSNs showed the highest water-uptake value of 54.2% and lowest methanol permeability value of 5.23×10−6cm2s−1. When the content of SMSNs was higher than 3wt%, both the values decreased slightly because of the aggregation of SMSNs. All of the membranes showed the excellent proton conductivity as compared with Nafion 117. When 7wt% SMSNs were incorporated into the SPI, the membrane sample presented the highest proton conductivity at different testing temperatures, indicating that the addition of SMSNs can also improve the proton conductivity of composite membranes.