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Title: Tailored and integrated production of carboxylated cellulose nanocrystals (CNC) with nanofibrils (CNF) through maleic acid hydrolysis

Source: ChemNanoMat. 40: 1-9

Author(s)Wang, Ruibin; Chen, Liheng; Zhu, J.Y.; Yang, Rendang

Publication Year: 2017  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4709-2B

Abstract: This study demonstrates the feasibility of tailored and integrated production of carboxylated cellulose nanocrystals (CNC) with nanofibrils (CNF) from bleached pulp fibers through hydrolysis using a recyclable dicarboxylic acid. Hydrolysis experiments were conducted using ranges of 15–75 wt% maleic acid concentrations, 60–120°C temperatures, and 5–300 min reaction times. Maleic acid esterified cellulose resulted in carboxylated CNC and CNF. Furthermore, the acid-hydrolysis solubilized xylan and depolymerized cellulose, which substantially reduced the energy input for the production of CNF through subsequent mechanical fibrillation. A combined hydrolysis factor (CHF), a measure of hydrolysis severity, was developed to map xylan dissolution and cellulose depolymerization over the entire reaction space. It was found that CHF can be used to predict the morphological and chemical properties of the resultant CNC and CNF, independent of the individual reaction process variables. This is important for process scale-up design in order to tailor the properties of CNC and CNF for specific applications. With the low temperature hydrolysis and low energy input in mechanical fibrillation, along with the recyclability of maleic acid, the presented process has promise of achieving commercial success in the low-cost and sustainable production of CNC and CNF.

Keywords: Acid hydrolysis severity; Cellulose nanomaterials; Cellulose nanocrystals and nanofibrils; Cellulose depolymerization; Carboxylation; Xylan dissolution

Publication Review Process: Formally Refereed

File size: 1,024 kb(s)

Date posted: 04/26/2017

This publication is also viewable on Treesearch:  view
RITS Product ID: 84587
Current FPL Scientist associated with this product
Zhu, JunYong
Research General Engineer

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