Escorihuela Jorge, Sahuquillo Óscar, García-Bernabé Abel, Giménez Enrique, Compañ Vicente
Escuela Técnica Superior de Ingenieros Industriales-Departamento de Termodinámica Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46020 Valencia, Spain.
Instituto de Tecnología de Materiales, Universitat Politècnica de València, Camino de Vera s/n, 46020 Valencia, Spain.
Nanomaterials (Basel). 2018 Sep 29;8(10):775. doi: 10.3390/nano8100775.
The preparation and characterization of composite polybenzimidazole (PBI) membranes containing zeolitic imidazolate framework 8 (ZIF-8) and zeolitic imidazolate framework 67 (ZIF-67) is reported. The phosphoric acid doped composite membranes display proton conductivity values that increase with increasing temperatures, maintaining their conductivity under anhydrous conditions. The addition of ZIF to the polymeric matrix enhances proton transport relative to the values observed for PBI and ZIFs alone. For example, the proton conductivity of PBI@ZIF-8 reaches 3.1 × 10 S·cm at 200 °C and higher values were obtained for PBI@ZIF-67 membranes, with proton conductivities of up to 4.1 × 10 S·cm. Interestingly, a composite membrane containing a 5 wt.% binary mixture of ZIF-8 and ZIF-67 yielded a proton conductivity of 9.2 × 10 S·cm, showing a synergistic effect on the proton conductivity.
本文报道了含沸石咪唑酯骨架8（ZIF-8）和沸石咪唑酯骨架67（ZIF-67）的复合聚苯并咪唑（PBI）膜的制备与表征。磷酸掺杂的复合膜显示出质子传导率值随温度升高而增加，并在无水条件下保持其传导率。相对于单独的PBI和ZIF所观察到的值，向聚合物基体中添加ZIF可增强质子传输。例如，PBI@ZIF-8在200°C时的质子传导率达到3.1×10 S·cm，而PBI@ZIF-67膜获得了更高的值，质子传导率高达4.1×10 S·cm。有趣的是，含有5 wt.%ZIF-8和ZIF-67二元混合物的复合膜产生了9.2×10 S·cm的质子传导率，对质子传导率显示出协同效应。
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