Synthesis of titania nanoparticle-dispersed hybrid membranes from allyloxytitanium and phosphonic acid derivatives for fuel cell
Synthesis of titania nanoparticle-dispersed hybrid membranes from allyloxytitanium and phosphonic acid derivatives for fuel cell
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DOI：
10.1016/j.memsci.2018.05.072
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发表时间：
2018-10
影响因子：
9.5
通讯作者：
N. Ozawa;Koichiro Hayashi;W. Sakamoto;T. Yogo
中科院分区：
文献类型：
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作者：
N. Ozawa;Koichiro Hayashi;W. Sakamoto;T. Yogo
以四烯丙氧基钛和甲基丙烯酸膦酸为原料，通过简单的共聚-水解法制备了由脂肪族骨架和非晶态tio2纳米颗粒组成的无机-有机杂化膜。将四烯氧基钛（TAT）与甲基丙烯酸2-羟乙基磷酸（HEMAP）共聚，然后水解得到无机-有机杂化复合材料。红外和13c核磁共振谱证实了无机-有机杂化结构的形成。TEM和SAXS分析表明，非晶态tio2纳米粒子分散在聚合物基体中。膜具有良好的热稳定性，温度可达180 °C。甲基丙烯酸酯衍生物的脂肪链与TiO2NPs分散，提高了膜的力学性能。组成为95:5的HEMAP/TAT膜的拉伸模量为505 MPa。在130 °C和100%相对湿度（RH）下，95:5膜的电导率为4.1 × 10-2S cm-1，在130 °C和19.3%相对湿度（RH）下，其电导率为4.7 × 10-4S cm-1。在140 °C和30% RH条件下，95:5膜的峰值功率为4.8 mW/cm2。使用杂交膜的细胞在140 °C和30% RH下运行72 h，细胞电压没有下降。
Inorganic-organic hybrid membranes consisting of an aliphatic backbone and amorphous TiO2nanoparticles (NPs) were synthesized from tetraallyloxytitanium and phosphonic acid methacrylate via a simple copolymerization-hydrolysis method. Tetraallyoxytitanium (TAT) was copolymerized with 2-hydroxyethyl methacrylate acid phosphate (HEMAP), and then hydrolyzed, yielding inorganic-organic hybrid composites. IR and13C NMR spectroscopy confirmed the formation of the inorganic-organic hybrid structure. TEM and SAXS showed that amorphous TiO2NPs were dispersed in the polymer matrix. The membranes exhibited good thermal stability up to 180 °C. The aliphatic chains of the methacrylate derivative dispersed with TiO2NPs improved the mechanical properties of the membranes. The tensile modulus of the HEMAP/TAT membrane with a composition of 95:5 was 505 MPa. The conductivity of the 95:5 membranes was 4.1 × 10-2S cm-1at 130 °C and 100% relative humidity (RH), while it was 4.7 × 10-4S cm-1at 130 °C and 19.3% RH. The peak power of the 95:5 membrane was 4.8 mW/cm2at 140 °C and 30% RH. The cell utilizing the hybrid membrane was operated at 140 °C and 30% RH for 72 h without any drop in cell voltage.