Simplification of gel point characterization of cellulose nano and microfiber suspensions

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Sánchez Salvador, José Luis and Monte Lara, M. Concepción and Negro Álvarez, Carlos Manuel and Batchelor, Warren and Garnier, Gil and Blanco Suárez, Ángeles (2021) Simplification of gel point characterization of cellulose nano and microfiber suspensions. Cellulose, 28 . pp. 6995-7006. ISSN 0969-0239

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Official URL: https://doi.org/10.1007/s10570-021-04003-5



Abstract

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.


Item Type:Article
Uncontrolled Keywords:Aspect ratio; Cellulose nanofibers; Characterization; CSAPS smoothing spline; Gel point; Sedimentation
Subjects:Sciences > Chemistry > Paper industry
Sciences > Chemistry > Chemical engineering
ID Code:72945
Deposited On:17 Jun 2022 08:14
Last Modified:17 Jun 2022 10:31

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