The structure and the mechanical properties of a newly fabricated cellulose-nanofiber/polyvinyl-alcohol composite

Yukako Oishi, Atsushi Hotta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cellulose nanofibers (Cel-F) were extracted by a simple and harmless Star Burst (SB) method, which produced aqueous cellulose-nanofiber solution just by running original cellulose beads under a high pressure of water in the synthetic SB chamber. By optimizing the SB process conditions, the cellulose nanofibers with high aspect ratios and the small diameter of ∼23 nm were obtained, which was confirmed by transmission electron microscopy (TEM). From the structural analysis of the Cel-F/PVA composite by the scanning electron microscopy (SEM), it was found that the Cel-F were homogeneously dispersed in the PVA matrix. Considering the high molecular compatibility of the cellulose and PVA due to the hydrogen bonding, a good adhesive interface could be expected for the Cel-F and the PVA matrix. The influences of the morphological change in Cel-F on the mechanical properties of the composites were analysed. The Young's modulus rapidly increased from 2.2 GPa to 2.9 GPa up to 40 SB treatments (represented by the unit Pass), whereas the Young's modulus remained virtually constant above 40 Pass. Due to the uniform dispersibility of the Cel-F, the Young's modulus of the 100 Pass composite at the concentration of 5 wt% increased up to 3.2 GPa. The experimental results corresponded well with the general theory of the composites with dispersed short-fiber fillers, which clearly indicated that the potential of the cellulose nanofibers as reinforcement materials for hydrophilic polymers was sufficiently confirmed.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherMaterials Research Society
Volume1621
DOIs
Publication statusPublished - 2014
Event2013 MRS Fall Meeting - Boston, MA, United States
Duration: 2013 Dec 12013 Dec 6

Other

Other2013 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period13/12/113/12/6

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Keywords

  • composite
  • fiber
  • polymer

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Oishi, Y., & Hotta, A. (2014). The structure and the mechanical properties of a newly fabricated cellulose-nanofiber/polyvinyl-alcohol composite. In Materials Research Society Symposium Proceedings (Vol. 1621). Materials Research Society. https://doi.org/10.1557/opl.2014.141