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Size effects on the nanomechanical properties of cellulose I nanocrystals

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dc.creator Pakzad, Anahita
dc.creator Simonsen, John
dc.creator Heiden, Patricia A.
dc.creator Yassar, Reza S.
dc.date.accessioned 2012-10-22T20:28:04Z
dc.date.available 2012-10-22T20:28:04Z
dc.date.issued 2012-02-14
dc.identifier.citation Pakzad, A., Simonsen, J., Heiden, P., & Yassar, R. (2012). Size effects on the nanomechanical properties of cellulose I nanocrystals. Journal of Materials Research, 27(3), 528-536. doi: 10.1557/jmr.2011.288 en_US
dc.identifier.uri http://hdl.handle.net/1957/34564
dc.description This is the publisher’s final pdf. The published article is copyrighted by Materials Research Society and can be found at: http://www.mrs.org/home/. en_US
dc.description.abstract The ultimate properties of a fibrous composite system depend highly on the transverse mechanical properties of the fibers. Here, we report the size dependency of transverse elastic modulus in cellulose nanocrystals (CNCs). In addition, the mechanical properties of CNCs prepared from wood and cotton resources were investigated. Nanoindentation in an atomic force microscope (AFM) was used in combination with analytical contact mechanics modeling (Hertz model) and finite element analysis (FEA) to estimate the transverse elastic moduli (Et) of CNCs. FEA modeling estimated the results more accurately than the Hertz model. Based on the AFM-FEA calculations, wood CNCs had higher transverse elastic moduli in comparison to the cotton CNCs. Additionally, Et was shown to increase with a reduction in the CNCs' diameter. This size-scale effect was related to the Ia/Ib ratio and crystalline structure of CNCs. en_US
dc.description.sponsorship The authors acknowledge the National Science Foundation for the Grant No. 0820884 from the Division of Materials Research (DMR) and the Grant No. 11000806/ 1100572 from DMR and Civil, Mechanical, and Manufacturing Innovation (CMMI) divisions. en_US
dc.language.iso en_US en_US
dc.publisher Materials Research Society en_US
dc.relation.ispartofseries Journal of Materials Research en_US
dc.relation.ispartofseries Vol. 27 no. 3 en_US
dc.subject Atomic force microscopy en_US
dc.subject Neutron fiber diffraction en_US
dc.subject Hydrogen bonding system en_US
dc.subject Synchrotron x-ray en_US
dc.subject Elastic modulus en_US
dc.subject crystal structure en_US
dc.subject Microcrystalline cellulose en_US
dc.subject Micromechanical properties en_US
dc.subject Polymer nanocomposites en_US
dc.subject Native cellulose en_US
dc.title Size effects on the nanomechanical properties of cellulose I nanocrystals en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1557/jmr.2011.288

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