Halabi Manar, Mann-Lahav Meirav, Beilin Vadim, Shter Gennady E, Elishav Oren, Grader Gideon S, Dekel Dario R
The Wolfson Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
The Nancy & Stephan Grand Technion Energy Program (GTEP), Technion, Israel Institute of Technology, Haifa 3200003, Israel.
Polymers (Basel). 2020 May 1;12(5):1020. doi: 10.3390/polym12051020.
Anion-conducting ionomer-based nanofibers mats are prepared by electrospinning (ES) technique. Depending on the relative humidity (RH) during the ES process (RH), ionomer nanofibers with different morphologies are obtained. The effect of relative humidity on the ionomer nanofibers morphology, ionic conductivity, and water uptake (WU) is studied. A branching effect in the ES fibers found to occur mostly at RH < 30% is discussed. The anion conductivity and WU of the ionomer electrospun mats prepared at the lowest RH are found to be higher than in those prepared at higher RH. This effect can be ascribed to the large diameter of the ionomer fibers, which have a higher WU. Understanding the effect of RH during the ES process on ionomer-based fibers' properties is critical for the preparation of electrospun fiber mats for specific applications, such as electrochemical devices.
基于阴离子导电离聚物的纳米纤维垫通过静电纺丝（ES）技术制备。根据静电纺丝过程中的相对湿度（RH），可获得具有不同形态的离聚物纳米纤维。研究了相对湿度对离聚物纳米纤维形态、离子电导率和吸水率（WU）的影响。讨论了在相对湿度低于30%时静电纺丝纤维中大多出现的分支效应。发现在最低相对湿度下制备的离聚物静电纺垫的阴离子电导率和吸水率高于在较高相对湿度下制备的垫。这种效应可归因于离聚物纤维的大直径，其具有较高的吸水率。了解静电纺丝过程中的相对湿度对基于离聚物的纤维性能的影响对于制备用于特定应用（如电化学装置）的静电纺丝纤维垫至关重要。
