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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Fiber and Chemical Sciences Research

Project Title :  Development of cellulose nano-crystals
Project Number : FPL-4709-2A
Start Date : 08-24-2007
End Date : 08-23-2012

View the 14 publications associated with this project.

Alan W. RudiePrincipal Investigator:
Alan W. Rudie

Non Technical Summary
The crystalline portion of cellulose does not dissolve in acid and can be separated from the other components of wood cellulose by hydrolyzing the hemicellulose and amorphous cellulose with 50-65% sulfuric acid. The yield from this method is about 25% of the starting wood. The nano-particles collected are needle-shaped crystalline materials that are expected to work well in nano-fiber reinforced composite materials. Using dissolving pulp methods will provide a yield of about 50 percent, but particle shape and size will need to be controlled by the formation method.

Objectives Summary
Isolate cellulose nano-crystals using conventional methods of acid hydrolysis of the non-crystalline cellulose, and new higher yield processes using dissolving pulps. Evaluate surface treatments to improve compatibility of the cellulose crystals with the polymer matrix and support other units in evaluation and testing of cellulose nano-crystals as reinforcement of polymers.

Approach Summary
Produce cellulose nano-crystals using the conventional strong acid method to provide material for RWU-4706 to test in composite materials. Evaluate production of nano-sized cellulose materials using dissolving pulps similar to rayon and acetate and production methods like electro-spinning, extrusion and surface science. Surface treatments readily available include formation of esters, silicates and ethers.

Publications associated with this Project

Publication YearTitleDate Posted
2012Approaching zero cellulose loss in cellulose nanocrystal (CNC) production: recovery and characterization of cellulosic solid residues (CSR) and CNC10/05/12
2010Atomic Force Microscopy Characterization of Cellulose Nanocrystals05/17/10
2011Cellulose crystallinity of woods, wood pulps, and agricultural fibers by FT-Raman Spectroscopy09/07/11
2010Cellulose I crystallinity determination using FT-Raman spectroscopy: univariateand multivariate methods07/28/10
2012Cellulose nanocrystals as a reinforcing material for electrospun poly(methyl methacrylate) fibers: formation, properties and nanomechanical characterization04/25/12
2010Crystallinities of Nanocrystalline and Nanofibrillated Celluloses by FT-Raman Spectroscopy12/05/10
2009Determination of Cellulose I Crystallinity by FT-Raman Spectroscopy08/19/09
2012Improved instrumented Indentation of Soft Materials through Surface Deformation Measurements10/25/12
2011Integrated production of nano-fibrillated cellulose and cellulosic biofuel (ethanol) by enzymatic fractionation of wood fibers06/06/11
2012Morphological development of cellulose fibrils of a bleached eucalyptus pulp by mechanical fibrillation09/05/12
2012Nanocellulose reinforcement of Transparent Composites09/27/12
2009Raman Analysis and Maping of Cellulose nanocrystal Polypropylene Composite08/19/09
2012Spatially Resolved Characterization of Cellulose Nanocrystal-Polypropylene Composite by Confocal Raman Microscopy09/04/12
2009Tools for the Characterization of Biomass at the Nanometer Scale10/06/09

Project Summaries last modified: 06-22-2011