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Erschienen in: Cellulose 6/2021

24.02.2021 | Original Research

Isolation and rheological characterization of cellulose nanofibrils (CNFs) produced by microfluidic homogenization, ball-milling, grinding and refining

verfasst von: Jinsong Zeng, Fugang Hu, Zheng Cheng, Bin Wang, Kefu Chen

Erschienen in: Cellulose | Ausgabe 6/2021

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Abstract

The aim of this work is to study and compare the morphology and rheology of cellulose nanofibrils (CNFs) from bleached softwood kraft pulp by several mechanical treatment methods. Three different kinds of CNFs were prepared in this work: (i) ones produced by PFI milling and microfluidic homogenization (RM-CNFs), (ii) ones produced by grinding and microfluidic homogenization (GM-CNFs), and (iii) ones produced by ball milling and ultrasonication (BU-CNFs). RM-CNFs had a high aspect ratio and the highest viscosity, storage modulus, and loss modulus. GM-CNFs had homogeneous size distributions, but low aspect ratio due to severe shearing of narrower orifice of chamber in microfluidic homogenization process. For BU-CNFs, the size distributions were heterogeneous, but they had a high aspect ratio. The three kinds of CNFs all had a lower crystallinity index than BSKP, and the degree of polymerization decreased with the increase of treatment intensity. Results of rheology measurements showed that those CNFs had a high degree of fibrillation and had a wider linear viscoelastic region in oscillatory strain measurements. Also the CNFs with high aspect ratio had a high viscosity and modulus. Additional treatments did not always increase the viscosity and modulus due to too severe treatments, which could cause the decrease of aspect ratio of CNFs. The RM-CNFs had a high viscosity and modulus, which means they are suitable in applications of rheology control.

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Literatur
Zurück zum Zitat Herrick FW, Casebier RL, Hamilton JK, Sandberg KR (1983) Microfibrillated cellulose: morphology and accessibility. J Appl Polym Sci: Appl Polym Symp; (United States), No. CONF-8205234-Vol. 2. ITT Rayonier Inc., Shelton, WA Herrick FW, Casebier RL, Hamilton JK, Sandberg KR (1983) Microfibrillated cellulose: morphology and accessibility. J Appl Polym Sci: Appl Polym Symp; (United States), No. CONF-8205234-Vol. 2. ITT Rayonier Inc., Shelton, WA
Zurück zum Zitat Naderi A, Lindström T (2015) Rheological measurements on nanofibrillated cellulose systems: a science in progress. In: Mondal M (ed) Cellulose and cellulose derivatives: synthesis, modification and applications. Nova Science Publishers Inc., New York, pp 187–202 Naderi A, Lindström T (2015) Rheological measurements on nanofibrillated cellulose systems: a science in progress. In: Mondal M (ed) Cellulose and cellulose derivatives: synthesis, modification and applications. Nova Science Publishers Inc., New York, pp 187–202
Metadaten
Titel
Isolation and rheological characterization of cellulose nanofibrils (CNFs) produced by microfluidic homogenization, ball-milling, grinding and refining
verfasst von
Jinsong Zeng
Fugang Hu
Zheng Cheng
Bin Wang
Kefu Chen
Publikationsdatum
24.02.2021
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 6/2021
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-03702-3

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