Elastic moduli of cellulose nanofibers isolated from various cellulose resources by using aqueous counter collision
An atomic force microscopy (AFM) three-points bending (TPB) test is very useful to measure the mechanical properties of cellulose nanofibers (CNFs). This study investigates the Young’s moduli of various CNFs by using AFM TPB test. CNFs were isolated from hardwood, softwood, bamboo and cotton by using an aqueous counter collision (ACC) method. Single CNF was transferred to the AFM calibration chip by using contact transfer for the AFM TPB test and the CNF was considered as a clamped-clamped beam. An Euler equation was used to calculate Young’s modulus under linear deformation assumption. The cross section of single CNF is assumed to be circular shape. Young’s moduli of hardwood, softwood, bamboo and cotton CNFs isolated by ACC method are in the range of 88–110 GPa, which are comparable with the previously reported values.
KeywordsCellulose nanofiber Three-points bending test Atomic force microscopy Young’s modulus Aqueous counter collision Micromechanics
This research was supported by Creative Research Initiatives Program through the National Research Foundation of Korea (NRF-2015R1A3A2066301).
- Chen X, Kuhn E, Wang W, Park S, Flanegan K, Trass O, Tenlep L, Tao L, Tucker M (2013) Comparison of different mechanical refining technologies on the enzymatic digestibility of low severity acid pretreated corn stover. Bioresour Technol 147:401–408. https://doi.org/10.1016/j.biortech.2013.07.109 CrossRefPubMedGoogle Scholar
- Kondo T, Morita M, Hayakawa K, Onda Y (2005) Wet pulverizing of polysaccharides. US patent US 7357339 B2Google Scholar
- Mimms A (1993) Kraft pulping: a compilation of notes. TAPPI Press, AtlantaGoogle Scholar
- Pääkko M, Ankerfors M, Kosonen H, Nykänen A, Ahola S, Österberg M, Ruokolainen J, Laine J, Larsson PT, Ikkala O, Lindström T (2007) Enzymatic hydrolysis combined with mechanical shearing and high-pressure homogenization for nanoscale cellulose fibrils and strong gels. Biomacromolecules 8:1934–1941. https://doi.org/10.1021/bm061215p CrossRefPubMedGoogle Scholar
- Xu W, Mulhern PJ, Blackford BL, Jericho MH, Templeton I (1994) A new atomic-force microscopy technique for the measurement of the elastic properties of biological-materials. Scan Microsc 8:499–506Google Scholar