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

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

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.

• Language: English
• Keywords: cationic cellulose, nanofibrils, microfibrils, rheology
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Publication status: Published
• Publication version: Version of Record
• Publication date: 05.01.2022
• Year: 2022
• Number of pages: Str. 1435-1450
• Numbering: Vol. 29, iss. 3
• PID: 20.500.12556/RUL-134371
• UDC: 661.728:532.135
• ISSN on article: 0969-0239
• DOI: 10.1007/s10570-021-04365-w
• COBISS.SI-ID: 92296707
• Publication date in RUL: 12.01.2022

Record is a part of a journal

• Title: Cellulose
• Shortened title: Cellulose
• Publisher: Springer Nature
• ISSN: 0969-0239
• COBISS.SI-ID: 512098329

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 04.01.2022

Secondary language

• Language: Slovenian
• Keywords: kationska celuloza, nanovlakna, mikrovlakna, reologija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0191
• Name: Kemijsko inženirstvo