期刊论文

Ding, Mei;Jia, Chuankun

英文

Journal of Membrane Science

0376-7388

2019

572

110-118

10.1016/j.memsci.2018.11.009

To verify the introduction of lignin into the polymer matrix, FT-IR was carried out on SPEEK and SPEEK/L membranes. Fig. 2 clearly shows the FT-IR spectra of the pristine lignin, different membranes with and without lignin. For lignin, the broad band at 3412 cm−1 was assigned to O-H stretch vibration of phenolic and aliphatic OH groups [29]. Those peaks at 2938 cm−1 and 2849 cm−1 might be C–H stretch in methyl and methylene group (–CH2–), and the characteristic bands at 1594 cm−1, 1511 cm−1

本校为第一且通讯机构

The commercial Nafion proton exchange membranes are most widely used in vanadium redox flow batteries (VRBs). However, their poor ion selectivity and high cost significantly limits the further development of the VRB. Herein, a green biopolymer, lignin, was firstly employed as the additive in the pristine SPEEK membrane to replace the Nafion membrane for the VRB applications. It is found that the abundant hydroxyl groups in lignin not only facilitate the dispersion of the lignin in the SPEEK matrix, but also significantly improve the proton cond...