Porous electrospun fibre mats with with proton conductivity for composite membranes

用于复合膜的具有质子传导性的多孔电纺纤维垫

• 批准号: 413271034
• 负责人: Professor Dr. Roland Marschall
• 金额: --
• 依托单位: Lehrstuhl für Physikalische Chemie III
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/413271034?language=en
• 关键词: Porous; electrospun; fibre; mats; proton

Aim of this project is the synthesis of flexible SiO2 fibre mats via electrospinning, which will be functionalized with sulfonic acid or benzimidazole groups for high proton conduction. Different strategies will be pursued to achieve electrospun nanofibers with high porosity, to enable high loading with proton conducting functional groups.Firstly, dispersed SiO2 nanoparticles will be used for electrospinning to achieve porous SiO2 fibre mats due to interparticular porosity. Subsequently, those porous fibre mats will be functionalized with proton conducting groups. Therefore, especially a newly developed CVD-type method will be used to avoid any mechanical stress on the fibre mat.For comparison and to achieve high intrinsic proton conduction of the resulting fibre mats, dispersions of mesoporous SiO2 nanoparticles, modified with either sulfonic acid groups or benzimidazole groups, will be used for electrospinning. Variations of the size and the pore structure of the nanoparticles are planned to optimize the proton conduction of the resulting fibre mats at low relative humidities.The produced fibre mats will be investigated concerning their temperature- and humidity-dependent proton conduction via impedance spectroscopy.Subsequently, the fibre mats will be infiltrated either with Nafion or sPEEK, and the humidity- and temperature-dependent proton conduction of the composite membranes will be investigated. Moreover, these novel fibre mats will be applied in photoelectrochemical cells for photoelectrochemical water splitting.

本项目的目的是通过静电纺丝合成柔性的SiO_2纤维毡，并用磺酸或苯并咪唑基团对其进行功能化处理，以获得高质子导电性。不同的策略将被用来获得高孔隙率的电纺纳米纤维，以使其能够高负载质子传导官能团。首先，分散的二氧化硅纳米颗粒将被用于电纺以获得多孔性的二氧化硅纤维垫。随后，这些多孔纤维垫将被质子传导基团功能化。因此，特别是一种新开发的CVD类型的方法将被用来避免纤维毡上的任何机械应力。为了比较和实现所得到的纤维垫的高本征质子导电性，用磺酸基团或苯并咪唑基团修饰的介孔二氧化硅纳米颗粒的分散体将用于静电纺丝。通过改变纳米颗粒的尺寸和孔结构来优化低相对湿度下纤维膜的质子导电性，通过阻抗谱研究纤维膜的温度和湿度相关的质子传导，然后用Nafion或SPEK对纤维膜进行渗透，并研究复合膜的湿度和温度相关的质子传导。此外，这些新型纤维垫还将应用于光电化学电池中，用于光电化学分解水。