20.500.12556/DKUM-95711 High oxygen barrier chitosan films neutralized by alkaline nanoparticles The most frequent neutralisation procedure, applied on chitosan (CS) films includes treatment with NaOH base. Such treatment endows CS films with stability in water, yet, same can significantly decrease the film performance. In the present paper, we investigate Mg(OH)2 nanoparticles as a neutralisation agent for CS solutions followed by casting into films. This is combined and compared with classical casting and film drying from nonneutralized solutions followed by NaOH treatment after film formation. The influence on the properties of resulting films is investigated in detail and large differences are found for structure and barrier properties. The stable, opaque-to-transparent CS films (depending on Mg(OH)2 content and post-treatment) were obtained by facile casting method of neat CS or CS–Mg(OH)2 dispersions, in the complete absence of cross-linkers and plasticizers. FTIR data demonstrate the Mg(OH)2 and NaOH deprotonation effect, and strongly suggest intensive H-bonding interaction between CS and Mg(OH)2. X-ray photoelectron spectroscopy showed differences in the hydroxide content and protonation of CS nitrogen. The reduction of surface roughness and increase of homogeneity, the tensile strength and elongation, as well as thermal stability and excellent oxygen barrier properties were measured for CS enclosing the Mg(OH)2 nanoparticles. Further treatment with 1 M NaOH causes repacking of CS polymer chains, improving the crystallinity and water vapour barrier properties, degrading the mechanical properties by increasing the films brittleness and increasing the char formation due to reduced thermal stability. CS films Mg(OH)2 neutralization oxygen barrier properties CS filmi nevtralizacija mikrostruktura prenos kisika in toplote lastnosti kisikove pregrade true false true Chapman & Hall, Kluwer Academic Publishers (Springer) Angleški jezik Slovenski jezik https://link.springer.com/journal/10570 © The Author(s) 2021 Članek v reviji 2025-10-14 12:23:02 2025-10-14 12:23:02 2025-10-15 03:14:25 0000-00-00 00:00:00 2021 0 0 str. 10457-10475 št. 16 let. 28 sept. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2021-05-24 2021-09-13 2021-09-21 677.46:620.3 77636611 10.1007/s10570-021-04195-w 0969-0239 s10570-021-04195-w.pdf s10570-021-04195-w.pdf 1 567D89DB4208695C623C5E6F7B43CF83 2d7d77630f189b71bda64a146427864c52cc31940faf3c84ad9b3ab809f5bf4b f9f15c65-a8e8-11f0-97dd-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=199840 https://link.springer.com/article/10.1007/s10570-021-04195-w 0 074139d9-a8e9-11f0-97dd-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=199841 Fakulteta za strojništvo Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0