Modification of the transport properties of ion exchange membranes. IX. Layer formation on a cation exchange membrane by acid-amide bonding, and transport properties of the resulting membrane

Oriented MOF-polymer Composite Nanofiber Membranes for High Proton Conductivity at High Temperature and Anhydrous Condition

“…The asymmetric stretching appeared peak at 1374 cm −1 in the IR spectrum verifies the successful formation of − SO 2 Cl. After reaction with ZCCH, the band totally disappeared and a new band at 1310 cm −1 appeared, corresponding to − SO 2 NH − group, which confirms the acid-amine bonding in electrospun nanofiber membranes28. The formation of chemical bonds between two-phase can avoid the phase separation and will improve the proton conductivity of the final PEMs.…”

Proton exchange membrane from tetrazole-based poly (phthalazinone ether sulfone ketone) for high-temperature fuel cells

“…PPESK-SO 2 Cl exhibits a lower absorption at 1371 cm À1 due to the eSO 2 Cl asymmetric stretching. Finally, AtSPPESK-22 has broad bands at 3500 and 2800 cm À1 that can be attributed to tetrozole absorption, confirming the acid-base bonding in AtSPPESK-x [30].…”

“…The peaks at 1593 cm À1 and 1242 cm À1 are ascribed to the double bonds stretching in aromatic rings (n C]C), and ether bonds stretching (n CeOeC), respectively [26]. For SPPESK, the stretch vibration of sulphone (O]S]O) in sulfonic acid group locate at 1085 and 989 cm À1 , and the absorption peak of aromatic ring at 1499 cm À1 move to 1477 cm À1 because of the sulfonation [26,29,30]. PPESK-SO 2 Cl exhibits a lower absorption at 1371 cm À1 due to the eSO 2 Cl asymmetric stretching.…”

“…Firstly, the AtSPPESK-x membrane exhibits a low weight loss (<5% of the total) below 100 C, which is due to water loss from the hydrophilic functional groups (eSO 2 NHeATET). The second decomposition step occurs in the i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 6 ) 1 e1 0 temperature range of T ¼ 190e400 C and attributes to the degradation of the functional groups and residual solvent [3,29,30]. The third decomposition happens at above 440 C, which is caused by the decomposition of main chain of polymer.…”

Synthesis, characterization, and application of polyethersulfone bound‐iminodiacetic acid

“…The adsorption peak at 1181 cm À1 in Figure 2(b) belongs to the SO 2 symmetric stretching vibrations of the chlorosulfonic group (ASO 2 Cl), and the peak at 1375 cm À1 belongs to (ASO 2 Cl) symmetric stretching vibration. 27 These absorption peaks indicated that the PES was chlorosulfonated successfully and was grafted with the chlorosulfonic groups (ASO 2 Cl). In addition, it could be seen that a characteristic sulfonic acid absorption peak at 1082 cm À1 appeared in Figure 2(b).…”