title: Structure and mechanical properties of wet-spun fibers made from natural cellulose nanofibers.
abstract: Cellulose nanofibers were prepared by TEMPO-mediated oxidation of wood pulp and tunicate cellulose. The cellulose nanofiber suspension in water was spun into an acetone coagulation bath. The spinning rate was varied from 0.1 to 100 m/min to align the nanofibers to the spun fibers. The fibers spun from the wood nanofibers had a hollow structure at spinning rates of >10 m/min, whereas the fibers spun from tunicate nanofibers were porous. Wide-angle X-ray diffraction analysis revealed that the wood and tunicate nanofibers were aligned to the fiber direction of the spun fibers at higher spinning rates. The wood spun fibers at 100 m/min had a Young's modulus of 23.6 GPa, tensile strength of 321 MPa, and elongation at break of 2.2%. The Young's modulus of the wood spun fibers increased with an increase in the spinning rate because of the nanofiber orientation effect.
authors.affiliation: Graduate School of Agricultural, Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan. atiwata@mail.ecc.u-tokyo.ac.jp
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Iwamoto
authors.forename: Akira
authors.initials: A
authors.lastname: Isogai
authors.forename: Tadahisa
authors.initials: T
authors.lastname: Iwata
mesh_terms: D002482:Cellulose / Q000138:chemical synthesis* / Q000737:chemistry*; D055119:Elastic Modulus; D008422:Materials Testing; D055595:Mechanical Phenomena; D015394:Molecular Structure; D057139:Nanofibers / Q000737:chemistry*; D014934:Wood
chemical_list: D002482:Cellulose