Lee, Boryeon Lim, Haeryang Chae, Ji Eon Kim, Hyoung-Juhn Kim, Tae-Hyun 2024-01-19T20:31:54Z 2024-01-19T20:31:54Z 2021-09-02 2019-03-15 0376-7388 https://pubs.kist.re.kr/handle/201004/120205 An additive-induced physically crosslinked system for use as anion exchange membranes was developed by blending an additive (DHBQA) containing both long alkyl (C-12, dodecyl) and quaternary ammonium groups into a dodecyl-substituted and quaternary ammonium-functionalized PPO (poly(2,6-dimethyl-1,4-phenylene oxide)) (C12-PPO-QA). The additive, whose diammonium groups act as ion conductors, and whose long alkyl chains bind to the alkyl chains of the C12-PPO-QA polymer through van der Waals interactions, induced the formation of ion clusters as well as physical crosslinking of the C12-PPO-QA polymer. Controlling the amount of additive to maximize its intermolecular interactions with the polymer resulted in a PPO-10.8 membrane (10.8 wt% of additive relative to polymer) with very high ion conductivities of 49.2 mS cm(-1) at 20 degrees C and 107.6 mS cm(-1) at 80 degrees C and low swelling ratios of 18.2% at 20 degrees C and 33.3% at 80 degrees C, as well as excellent mechanical and alkaline stability. The H-2/O-2 single cell performance using PPO-10.8 reached a maximum power density about 60mWcm(-2), higher than that of the PPO-0 sample. English ELSEVIER SCIENCE BV COMB-SHAPED POLYMERS COMPOSITE MEMBRANES ALKALINE STABILITY GRAPHENE OXIDE SIDE-CHAINS HYDROXIDE WATER CONDUCTIVITY POLYSULFONE TRANSPORT Physically-crosslinked anion exchange membranes by blending ionic additive into alkyl-substituted quaternized PPO Article 10.1016/j.memsci.2018.12.053 1 JOURNAL OF MEMBRANE SCIENCE, v.574, pp.33 - 43 JOURNAL OF MEMBRANE SCIENCE 574 33 43 scie scopus 000455487100005 2-s2.0-85059058956 Engineering, Chemical Polymer Science Engineering Polymer Science Article COMB-SHAPED POLYMERS COMPOSITE MEMBRANES ALKALINE STABILITY GRAPHENE OXIDE SIDE-CHAINS HYDROXIDE WATER CONDUCTIVITY POLYSULFONE TRANSPORT Anion exchange membranes Physically-crosslinked system Ion-conducting additive Ion conductivity Van der Waals interaction