A rheological study of cationic micro- and nanofibrillated cellulose : quaternization reaction optimization and fibril characteristic effects

Kopač, Tilen (avtor), Krajnc, Matjaž (avtor), Ručigaj, Aleš (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: cationic cellulose, nanofibrils, microfibrils, rheology
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 05.01.2022
• Leto izida: 2022
• Št. strani: Str. 1435-1450
• Številčenje: Vol. 29, iss. 3
• PID: 20.500.12556/RUL-134371
• UDK: 661.728:532.135
• ISSN pri članku: 0969-0239
• DOI: 10.1007/s10570-021-04365-w
• COBISS.SI-ID: 92296707
• Datum objave v RUL: 12.01.2022

Gradivo je del revije

• Naslov: Cellulose
• Skrajšan naslov: Cellulose
• Založnik: Springer Nature
• ISSN: 0969-0239
• COBISS.SI-ID: 512098329

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 04.01.2022

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kationska celuloza, nanovlakna, mikrovlakna, reologija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0191
• Naslov: Kemijsko inženirstvo