RT Journal Article
T1 Simplification of gel point characterization of cellulose nano and microfiber suspensions
A1 Sánchez Salvador, José Luis
A1 Monte Lara, M. Concepción
A1 Negro Álvarez, Carlos Manuel
A1 Batchelor, Warren
A1 Garnier, Gil
A1 Blanco Suárez, Ángeles
AB Nanocellulose is an emerging material that needs to be well characterized to control its performance during industrial applications. Gel point (Øg) is a convenient parameter commonly used to estimate the aspect ratio (AR) of cellulose nano/microfibers (CNFs/CMFs), providing critical information on the nanofiber network. However, its estimation requires many sedimentation experiments, tedious and time consuming. In this study, a simpler and faster technique is presented to estimate Øg, based on one or two sedimentation experiments, reducing the experiments by a factor of at least 2.5. Here, this new methodology is successfully validated by using the Øg of different CNF/CMF hydrogels calculated with the traditional methodology, showing an error lower than 7%. The error in the estimation of the AR is lower than 3% in all cases. Furthermore, the two mathematical models currently used to estimate Øg, the smoothing spline and the quadratic fit, are compared and the mathematical assumptions improved.
PB Springer
SN 0969-0239
YR 2021
FD 2021-06-17
LK https://hdl.handle.net/20.500.14352/7215
UL https://hdl.handle.net/20.500.14352/7215
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
NO Comunidad de Madrid
NO Universidad Complutense de Madrid/Banco de Santander
NO Australian Research Council, Australian Paper, Carter Holt Harvey, Circa, Norske Skog and Visy
DS Docta Complutense
RD 23 jul 2024