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Madison, WI 53726-2398
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Title: Chapter 1 Cellulose Nanocrystals - A material with Unique Properties and Many Potential Applications

Source: In: Production and applications of Cellulose Nanomaterials, Chapter 1, TAPPI Press 2013; pp. 9-12.

Author(s)Moon, Robert; Beck, Stephanie; Rudie, Alan

Publication Year: 2013  View PDF »

Category: Book Chapter
Associated Research Project(s):   FPL-4707-3B   FPL-4709-2B

Abstract: Cellulose nanocrystals (CNCs) are cellulose-based nanoparticles that can be extracted by acid hydrolysis from a wide variety of natural source materials (e.g., trees, annual plants, tunicates, algae, bacteria) [1-7]. These rod-like or whisker-shaped particles (Fig. 1, 3–20 nm wide, 50–2000 nm long) have a unique combination of characteristics: high axial stiffness (~150 GPa), high tensile strength (estimated at 7.5 GPa), low coefficient of thermal expansion (~1 ppm/K), thermal stability up to ~300°C, high aspect ratio (10–100), low density (~1.6 g/cm3), lyotropic liquid crystalline behavior, and shearthinning rheology in CNC suspensions. The exposed – OH groups on CNC surfaces can be readily modified to achieve different surface properties and have been used to adjust CNC self-assembly and dispersion for a wide range of suspensions and matrix polymers and to control interfacial properties in composites (e.g., CNC-CNC and CNC-matrix). This unique set of characteristics results in new capabilities compared to more traditional cellulosebased particles (wood flakes, pulp fibers, etc.) and the development of new composites that can take advantage of CNCs’ enhanced mechanical properties, low defects, high surface area to volume ratio, and engineered surface chemistries. CNCs have been successfully added to a wide variety of natural and synthetic polymers [2] and have been shown to modify composite properties (mechanical, optical, thermal, barrier). Additionally, CNCs are a particularly attractive nanoparticle because they have low environmental, health, and safety risks, are inherently renewable, sustainable, and carbon-neutral like the sources from which they are extracted, and have the potential to be processed in industrial-scale quantities at low costs.

Keywords: Cellulose nanocrystals; processing; applications

Publication Review Process: Non-Refereed (Other)

File size: 2,788 kb(s)

Date posted: 09/13/2013
RITS Product ID: 65237
Current FPL Scientists associated with this product (listed alphabetically)
Moon, Robert J.
Materials Research Engineer
Rudie, Alan W.
Supervisory Research Chemist

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