수전해용 MoPA 결합된 폴리에테르 에테르 케톤 고분자 복합막의 개발 및 특성

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 28; no. 4; pp. 338 - 344
• Main Authors: 김민진(Min Jin Kim), 김보영(Bo Young Kim), 문상봉(Sang-bong Moon), 정장훈(Jang Hoon Chung)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2017
• Subjects: 기계공학; 수소 이온 전도도; 공유 가교 결합; Proton conductivity; Covalently; PEM; SPEEK; 고분자 전해질 막; 술폰화 폴리에테르에테르케톤; cross-link
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2017.28.4.338

Polyoxometal molybdophosphoric acid (MoPA) bonded polyether ether ketone (PEEK) composite membrane for water electrolysis has been investigated. The composited membrane, covalently cross linked (CL) sulfonated polyether ether ketone (SPEEK) with a bonded MoPA, was prepared in sulfonation of PEEK, cross linkage reaction with 1,4-diiodobutane, and addition with MoPA. PEEK was covalently cross-linked with 1,4-diiodobutane to improve mechanical strength and was added with MoPA to increase proton conductivity. MoPA should be fixed to back bone of SPEEK to prevent bleeding out. Therefore, the carbonyl group of SPEEK was reduced with NaBH4 and 3-isocyanatepropyltriethoxysilane (ICPTES) was added. The MoPA bonded composite was produced in the reaction of MoPA with 3-mercaptopropyltrimethoxvsilane (MPTMS). In conclusion, MoPA bonded CL-SPEEK composite membrane featured 0.129 S/cm of proton conductivity at $80^{\circ}C$, and 2,156 hours of chemical stability in Fenton test. These properties are better than those of membranes of other SPEEK system.