Abstract

The miscibility of microbial poly(ε- L -lysine)/carboxymethyl cellulose sodium salt (ε-PL/CMC) blends was investigated by solid-state nuclear magnetic resonance methods. 1 H spin-lattice relaxation time in the laboratory frame T1, and in the rotating frame, T1ρ measurements indicate that the blends are miscible at all compositions on a scale of 2–5 nm. Formation of carbamates and its reversibility were examined. ε-PL/CMC hydrogel was formed by bubbling carbon dioxide gas into ε-PL and CMC aqueous solution mixture.

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