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Title: Tailoring the yield and characteristics of wood cellulose nanocrystals (CNC) using concentrated acid hydrolysis

Source: Cellulose

Author(s)Chen, Liheng; Wang, Qianqian; Hirth, Kolby; Baez, Carlos; Agarwal, Umesh P.; Zhu, J. Y.

Publication Year: 2015  View PDF »

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

Abstract: Cellulose nanocrystals (CNC) have recently received much attention in the global scientific community for their unique mechanical and optical properties. Here, we conducted the first detailed exploration of the basic properties of CNC, such as morphology, crystallinity, degree of sulfation and yield, as a function of production condition variables. The rapid cellulose depolymerization and sulfation reactions under concentrated acid concentrations of around 60 wt% resulted in a very narrow operating window for CNC production. We found that CNC yields as high as 70 wt% from a bleached eucalyptus kraft pulp with glucan content of 78 wt% can be achieved under a tight range of reaction conditions and that a weighted average length of over 200 nm and sulfur content (a measure of CNC surface charge) between 3 and 10 mg/g can be produced. This study provided critical knowledge for the production of CNC with characteristics tailored for different specific applications, significant to commercialization.

Keywords: Cellulose nanocrystals (CNC), Crystallinity, Crystal length and morphology, Surface charge, CNC yield optimization, Concentrated acid hydrolysis, Cellulose nanocrystals (CNC), Crystallinity, Crystal length and morphology, Surface charge, CNC yield optimization, Concentrated acid hydrolysis

Publication Review Process: Formally Refereed

File size: 1,060 kb(s)

Date posted: 09/25/2015

This publication is also viewable on Treesearch:  view
RITS Product ID: 75509
Current FPL Scientists associated with this product (listed alphabetically)
Agarwal, Umesh P.
Research Chemist
Zhu, JunYong
Research General Engineer
 

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