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Preparation and acid recovery of polyvinyl alcohol hybridized triethylene diamine anion exchange membranes

Authors： PANG Meijing1, ZHANG Liqing1, MA Yandong1, WANG Jia1, YUAN Zhiming2

Units： 1. School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China; 2. Shandong Huankeyuan Environmental Engineering Co.,Ltd., Jinan 250109, China

KeyWords： anion exchange membranes; acid recovery; diffusion dialysis; DABCO-COOH

ClassificationCode：TQ021.4

year,volume(issue):pagination： 2026,46(1):88-95

Abstract：

Anion exchange membranes (AEMs) are the core components of diffusion dialysis technology. In this study, the novel AEMs were prepared by using polyvinyl alcohol (PVA) and a carboxyl-containing quaternary ammonium material based on 1,4-diazabicyclo[2.2.2]octane (DABCO-COOH), and the physical and chemical properties of the membranes were tested by Fourier transform infrared spectroscopy and other characterization methods, and its application in acid recovery was evaluated. The research results showed that the overall performance of the membrane M2 obtained when the DABCO-COOH addition amount was 0.4 g was the best. At this time, the water content (WR) of the membrane was 91.55%, linear expansion rate (LER) was 25.43%, and the ion exchange capacity (IEC) was 1.054 mmol/g, with tensile strength (TS) value of 53.4 MPa, elongation at break (Eb) value of 158.5%, dialysis coefficient (UH+) and separation factor (S) values of 21.1×10-3 m/h and 44.5, respectively. The performance of the new ion exchange membranes is better than that of commercial DF-120 membrane, and it shows high application potential in the field of acid recovery.

Funds：

西部绿色建筑国家重点实验室开放项目(LSKF201807); 横向研究项目(w2021169)

AuthorIntro：

庞美晶（2001-），女，山西阳曲人，硕士研究生，主要研究方向为膜法水处理理论与技术

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