2026-04-18T01:32:58Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/212302024-06-18T12:07:10Zcom_2072_452955com_2072_2054col_2072_453062

2024-06-18T12:07:10Z urn:hdl:10256/21230 Enhanced Morphological Characterization of Cellulose Nano/Microfibers through Image Skeleton Analysis Sanchez-Salvador, José Luis Campano, Cristina López-Expósito, Patricio Tarrés Farrés, Joaquim Agustí Mutjé Pujol, Pere Delgado Aguilar, Marc Monte, M. Concepcion Blanco, Angeles Materials nanoestructurats Nanostructured materials Nanofibres Nanofibers Fibres de cel·lulosa Cellulose fibers 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 quantification 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 This research was funded by the Spanish Ministry of Economy and Competitiveness for the funding of the projects CTQ2017-85654-C2-1-R and CTQ2017-85654-C2-2-R and the Community of Madrid via funding of RETO-PROSOST-2-CM (S2018/EMT4459), as well as the Universidad Complutense 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 of Cristina Campano (Ref. FJC2019-040298-I). Marc Delgado-Aguilar is a Serra Húnter Fellow 2024-06-18T12:07:10Z 2024-06-18T12:07:10Z 2021-08-16 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed http://hdl.handle.net/10256/21230 info:eu-repo/semantics/altIdentifier/doi/10.3390/nano11082077 info:eu-repo/semantics/altIdentifier/eissn/2079-4991 CTQ2017-85654-C2-1-R info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2017-85654-C2-1-R/ES/PRODUCCION SOSTENIBLE DE NANOCELULOSAS PARA SU APLICACION EN DIFERENTES SECTORES Y PROCESOS INDUSTRIALES/ Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess MDPI (Multidisciplinary Digital Publishing Institute) Nanomaterials, 2021, vol. 11, núm. 8, p. 2077 Articles publicats (D-EQATA)