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Original Article | Open Access

Nanofibrillation of a Bleached Acacia Pulp by Grinding with Carboxymethylation Pretreatment

Ming He, GuiHua Yang( ), JiaChuan Chen, FanGong Kong, Qiang Wang
State Key Laboratory of Biobased Material and Green Papermaking /Key Lab of Pulp & Paper Science and Technology of Education Ministry of China, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, Shangdong Province, 250353, China
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Abstract

In this study, carboxymethylation, which introduces carboxyl groups to hydroxyl sites in pulp fibers, was used as a pretreatment before mechanical nanofibrillation.The carboxyl group content of the pulp fibers was greatly affected by the dosage of chloroacetic acid and the reaction temperature.During the following fibrillation process, it was found that pulp fibers with higher carboxyl group content exhibited higher water holding capacities and smaller dimensions.A more homogenous structure with a higher amount of individual fibrils was also observed in FE-SEM images of pulp fibers with high carboxyl group content.This can be explained by a high ionic group content in the fiber wall resulting in lower delamination resistance, making the fibrils easier to separate.Carboxymethylation pretreatment as a facilitator of fibrillation in cellulosic pulps is an efficient way to obtain cellulose nanofibrils and consequently decrease the energy consumption of the process.

Keywords

pretreatmentnanofibrillationgrindercarboxymethylationbleached acacia pulp

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Paper and Biomaterials
Volume 3 Issue 3,
July 2018
Pages 32-38
DOI: 10.26599/PBM.2018.9260019
Cite this article:
He M, Yang G, Chen J, et al. Nanofibrillation of a Bleached Acacia Pulp by Grinding with Carboxymethylation Pretreatment. Paper and Biomaterials, 2018, 3(3): 32-38. https://doi.org/10.26599/PBM.2018.9260019

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Received: 30 April 2018
Accepted: 25 May 2018
Published: 01 July 2018
© 2018 Paper and Biomaterials Editorial Board

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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