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Preparation and properties of oxidized black phosphorus nanosheets/sulfonated poly (ether ether ketone) composite membranes

Authors： Afzal, CHEN Wanting, PANG Bo, JIANG Xiaobin, WU Xuemei, HE Gaohong

Units： State Key Laboratory of Fine Chemicals, Research and Development Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China

KeyWords： Proton exchange membrane; Sulfonated poly (ether ether ketone); Oxidized black phosphorus nanosheets; Composite membrane.

ClassificationCode：TM911.4；TQ425.236

year,volume(issue):pagination： 2022,42(1):18-23

Abstract：

Oxidized black phosphorus (OBP) nanosheet was prepared by mechanical grinding of black phosphorus powder using red phosphorus as precursor and subsequent liquid-phase exfoliation process. OBP nanosheets were further incorporated into sulfonated poly (ether ether ketone) matrix to regulate ionic channels and enhance proton transport. The obtained composite proton exchange membranes (SPEEK/OBP) with 0~2.5 wt.% of OBP were prepared by a conventional solution casting method. As confirmed by FTIR and XPS spectra, OBP surface contains abundant oxygen-containing functional groups, which can promote water sorption of the composite membranes and form hydrogen bond network with sulfonic acid groups in SPEEK, facilitating proton transfer. Compared with the pristine SPEEK membrane, the SPEEK/OBP composite membrane exhibits higher ion exchange capacity (IEC), water uptake, swelling ratio and proton conductivity. With the optimal content of OBP nanosheets (2.0 wt.%), the SPEEK/OBP membrane achieves to the best performance, i.e., its proton conductivity was 0.026 S/cm at 30 ℃, which is 1.71 times as high as that of the pristine SPEEK membrane.

Funds：

国家自然科学基金（22008021, 21776034, 创新群体22021005）。

AuthorIntro：

Afzal（1995-），男，巴基斯坦，硕士生，主要从事质子交换膜的制备及性能研究

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