RT Journal Article
T1 Enhanced morphological characterization of cellulose nano/microfibers through image skeleton analysis
A1 Sánchez Salvador, José Luis
A1 Campano, Cristina
A1 López Expósito, Patricio
A1 Tarres, Quim
A1 Mutje, Pere
A1 Delgado Aguilar, Marc
A1 Monte, M. Concepcion
A1 Blanco, Angeles
AB The present paper proposes a novel approach for the morphological characterization of cellulose nano and microfibers suspensions (CMF/CNFs) based on the analysis of eroded CMF/CNF microscopy images. This approach offers a detailed morphological characterization and quantifi-cation of the micro and nanofibers networks present in the product, which allows the mode of fibrillation associated to the different CMF/CNF extraction conditions to be discerned. This information is needed to control CMF/CNF quality during industrial production. Five cellulose raw materials, from wood and non-wood sources, were subjected to mechanical, enzymatic, and (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO)-mediated oxidative pre-treatments followed by different homogenization sequences to obtain products of different morphologies. Skeleton analysis of microscopy images provided in-depth morphological information of CMF/CNFs that, complemented with aspect ratio information, estimated from gel point data, allowed the quantification of: (i) fibers peeling after mechanical pretreatment; (ii) fibers shortening induced by enzymes, and (iii) CMF/CNF entanglement from TEMPO-mediated oxidation. Being mostly based on optical microscopy and image analysis, the present method is easy to implement at industrial scale as a tool to monitor and control CMF/CNF quality and homogeneity.
PB MDPI
SN 2079-4991
YR 2021
FD 2021-08
LK https://hdl.handle.net/10016/34764
UL https://hdl.handle.net/10016/34764
LA eng
NO This research was funded by the Spanish Ministry of Economy and Competitiveness forthe funding of the projects CTQ2017-85654-C2-1-R and CTQ2017-85654-C2-2-R and the Communityof Madrid via funding of RETO-PROSOST-2-CM (S2018/EMT4459), as well as the UniversidadComplutense de Madrid and Banco de Santander via the grant of J.L. Sanchez-Salvador (CT17/17).Thanks also go to the Spanish Ministry of Science and Innovation for the Juan de la Cierva aid ofCristina Campano (Ref. FJC2019-040298-I). Marc Delgado-Aguilar is a Serra Húnter Fellow.
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RD 20 may. 2024