199 results about "Deprotonation" patented technology

The invention belongs to the technical field of ion exchange membranes, and relates to a nonionic hydrophilic side-chain polybenzimidazole (PBI) membrane and a preparation method thereof. The method is completed by the steps of deprotonation of PBI, nucleophilic substitution, membrane formation, acid absorption and the like. The nonionic hydrophilic side chain induces the formation of a microscopic phase separation structure and hydrophilic nano channels in the membrane; and as an effective proton transfer path, the hydrophilic nano channels obviously enhance the proton conductivity of the membrane. Meanwhile, due to the moderate pore size of the hydrophilic nano channels and the Donnan effect of the protonated PBI, the vanadium ion permeability of the membrane is low. In addition, no ion-exchange group is introduced, so the grafted PBI membrane maintains favorable chemical stability of the original PBI membrane in an all-vanadium redox flow battery. The nonionic hydrophilic side-chainPBI membrane has favorable comprehensive properties, i.e., has superhigh proton conductivity, high ion permselectivity and favorable chemical stability.

Disclosed is a release on demand type corrosion inhibitor composition for a metal substrate formed from only non-electrically conductive film forming copolymer(s); a nitrogen containing functional group X, where the group X comprises a pyridine, a dihydropyridine, a pyrrole, an imidazole, or a mixtures thereof; and a metallate anion. The metallate anion binds to a nitrogen in the functional group X by ion pairing. A localized rise in pH is believed to cause release of the anion via a protonation/deprotonation reaction and the released anion suppresses the corrosion formation. The coating composition includes no electrically conductive polymers.