Polysaccharide-based hydrogels crosslink density equation : a rheological and LF-NMR study of polymer-polymer interactions

Kopač, Tilen (author), Abrami, Michela (author), Grassi, Mario (author), Ručigaj, Aleš (author), Krajnc, Matjaž (author)

A simple relation between pendant groups of polymers in hydrogels is introduced to determine the crosslink density of (complex) hydrogel systems (mixtures of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) modified nanocellulose, alginate, scleroglucan and Laponite in addition of crosslinking agents). Furthermore, the rheological properties and their great potential connection to design complex hydrogel systems with desired properties have been thoroughly investigated. Hydrogel structures governing internal friction and flow resistance were described by the predominant effect of ionic, hydrogen, and electrostatic interactions. The relationship between rheological properties and polymer-polymer interactions in the hydrogel network is explained and expressed in a new mathematical model for determining the crosslink density of (crosslinked) hydrogels based on single or mixture of polymer systems. In the end, the combined used of rheology and low field nuclear magnetic resonance spectroscopy (LF-NMR) for the characterization of hydrogel networks is developed.

• Language: English
• Keywords: crosslink density, rheology, LF-NMR, hydrogel interactions, mathematical modeling
• 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
• Year: 2022
• Number of pages: 15 str.
• Numbering: Vol. 277, art. 118895
• PID: 20.500.12556/RUL-133265
• UDC: 678:532.135
• ISSN on article: 0144-8617
• DOI: 10.1016/j.carbpol.2021.118895
• COBISS.SI-ID: 85328899
• Publication date in RUL: 19.11.2021

Record is a part of a journal

• Title: Carbohydrate polymers
• Shortened title: Carbohydr. polym.
• Publisher: Elsevier
• ISSN: 0144-8617
• COBISS.SI-ID: 27286272

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.

Secondary language

• Language: Slovenian
• Keywords: gostota zamreženja, reologija, LF-NMR, hidrogelne interakcije, matematično modeliranje

Projects

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