含静电纺丝离子交换纳米纤维的聚电解质复合膜：纳米纤维表面电荷对离子传输的影响。

Polyelectrolyte Composite Membranes Containing Electrospun Ion-Exchange Nanofibers: Effect of Nanofiber Surface Charges on Ionic Transport.

机构信息

Department of Materials Science and Engineering , Tokyo Institute of Technology , Mail Box S8-27, 2-12-1 Ookayama , Meguro-ku, Tokyo 152-8552 , Japan.

Division of Applied Fine Chemistry, Graduate School of Sciences and Technology for Innovation , Yamaguchi University, and Blue Energy Center for SGE Technology (BEST) , 2-16-1 Tokiwadai, Ube , Yamaguchi 755-8611 , Japan.

出版信息

Langmuir. 2018 Oct 30;34(43):13035-13040. doi: 10.1021/acs.langmuir.8b02747. Epub 2018 Oct 17.

DOI:10.1021/acs.langmuir.8b02747

PMID:30293431

Abstract

Poly(vinyl alcohol) (PVA)-based ion-exchange nanofibers (IEX-NFs) and their composite polyelectrolyte membranes were prepared and characterized. The PVA-based NFs are well dispersed and form a three-dimensional network structure in the polymer matrix, Nafion. All of the prepared membranes show a similar ion-exchange capacity of ∼1.0 mmol g. The ionic conductivities through the PVA- b-PSS-NF/Nafion composite membranes are superior to that of the Nafion membranes, but the conductivity through the PVA-NF/Nafion composite membrane is half that of the Nafion membrane. Our electrokinetic measurements clearly indicate that a high density of ion-exchange groups on the NF surface results in a continuous ionic transport path in the polymer matrix. In addition, the mechanical strength of all of the NF-composite membranes is improved compared with that of the membranes without NF.

摘要

基于聚乙烯醇（PVA）的离子交换纳米纤维（IEX-NFs）及其复合聚合物电解质膜的制备与表征。基于 PVA 的 NF 分散良好，在聚合物基体 Nafion 中形成三维网络结构。所有制备的膜均表现出相似的离子交换容量约为 1.0mmol/g。通过 PVA-b-PSS-NF/Nafion 复合膜的离子电导率优于 Nafion 膜，但通过 PVA-NF/Nafion 复合膜的电导率仅为 Nafion 膜的一半。我们的电动测量清楚地表明，NF 表面上高浓度的离子交换基团在聚合物基质中产生了连续的离子传输路径。此外，与不含 NF 的膜相比，所有 NF-复合膜的机械强度都得到了提高。