20.500.12556/RUL-134371 A rheological study of cationic micro- and nanofibrillated cellulose quaternization reaction optimization and fibril characteristic effects Driven by the demand for various cationic biopolymers in recent years, the quaternization of cellulose nanofibers was carefully investigated to have tight control over their final characteristics. The addition of sodium hydroxide (NaOH) to the reaction mixture is crucial as it catalyzes the conversion of alcohol groups of cellulose into more reactive alcoholate groups. On the other hand, excessive concentration proves to inhibit the reactivity of hydroxyl groups. The addition of glycidyltrimethylammonium chloride (GTMAC) increases the yield of the trimethylammonium chloride content (TMAC) reaction, while in excess it affects the rheological properties of the quaternizated cellulose nanofibers. The effects of NaOH and GTMAC on the TMAC content and rheological properties have been investigated in detail and mathematically evaluated. Furthermore, a comparison of the viscoelastic behavior and shear thinning character of commercial cationic micro- and nanofibrillated cellulose is presented. The research allows to extend the possibility of using cellulose in many applications of cationic biopolymers. cationic cellulose nanofibrils microfibrils rheology kationska celuloza nanovlakna mikrovlakna reologija true false true Angleški jezik Slovenski jezik Članek v reviji 2022-01-12 07:09:34 2022-01-12 07:09:35 2022-09-13 03:54:46 0000-00-00 00:00:00 2022 0 0 Str. 1435-1450 iss. 3 Vol. 29 Feb. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-01-05 661.728:532.135 0969-0239 10.1007/s10570-021-04365-w 92296707 RAZ_Kopac_Tilen_2022.pdf RAZ_Kopac_Tilen_2022.pdf 1 582BC6F1D8503597A043C15E931626CA c0cbaffe992183a27287c71536b72c6046cf99d299768fcf4bf11a04d2c6a265 96fc2ea6-a6bd-11ec-960c-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154686 https://link.springer.com/article/10.1007/s10570-021-04365-w 1 0a34eaad-736e-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152782 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0