Fabrication of Dual-Functional Bacterial-Cellulose-Based Composite Anion Exchange Membranes with High Dimensional Stability and Ionic Conductivity

被引：7

作者：

Wang, Fei ^{[1
,2
]}

Qu, Ting ^{[1
]}

Yang, Huiyu ^{[1
]}

Yang, Haiyang ^{[1
]}

Ou, Ying ^{[1
]}

Zhang, Quanyuan ^{[2
]}

Cheng, Fan ^{[1
]}

Hu, Fuqiang ^{[1
]}

Liu, Hai ^{[1
]}

Xu, Zushun ^{[2
]}

Gong, Chunli ^{[1
]}

机构：

[1] Hubei Engn Univ, Hubei Engn & Technol Res Ctr Funct Mat Biomass, Sch Chem & Mat Sci, Xiaogan 432000, Hubei, Peoples R China

[2] Hubei Univ, Sch Mat Sci & Engn, Key Lab Green Preparat & Applicat Funct Mat, Hubei Key Lab Polymer Mat,Minist Educ, Wuhan 430062, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2024年 / 16卷 / 02期

关键词：

Bacterial cellulose; Polymer composites; Dualfunctionality; Trade-off effect; Anion exchangemembranes; PERFORMANCE; NANOFIBER; NANOTUBES; OXIDE);

D O I：

10.1021/acsami.3c15643

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Anion exchange membranes (AEMs) are increasingly becoming a popular research area due to their ability to function with nonprecious metals in electrochemical devices. Nevertheless, there is a challenge to simultaneously optimize the dimensional stability and ionic conductivity of AEMs due to the "trade-off" effect. Herein, we adopted a novel strategy of combining filling and cross-linking using functionalized bacterial cellulose (PBC) as a dual-functional porous support and brominated poly(phenylene oxide) (Br-PPO) as the cross-linking agent and filler. The PBC nanofiber framework together with cross-linking can provide a reliable mechanical support for the subsequent filled polymer, thus improving the mechanical properties and effectively limiting the size change of the final quaternized-PPO (QPPO)-filled PBC composite membrane. The composite membrane showed a very low swelling ratio of only 10.35%, even at a high water uptake (81.83% at 20 degrees C). Moreover, the existence of multiple -NR3+ groups in the cross-link bonds between BC and Br-PPO can provide extra OH- ion transport sites, contributing to the increase in ionic conductivity. The final membrane demonstrated a hydroxide ion conductivity of 62.58 mS cm(-1), which was remarkably higher than that of the pure QPPO membrane by up to 235.93% (80 degrees C). The successful preparation of the PBC3/QPPO membrane provides an effective avenue to tackle the trade-off effect through a dual-functional strategy.

引用

页码：2751 / 2762

页数：12