The Institute of Scientific and Industrial Research, Osaka University


LAST UPDATE 2018/06/04

  • 研究者氏名
    Researcher Name

    上谷幸治郎 Kojiro UETANI
    助教 Assistant Professor
  • 所属
    Professional Affiliation

    The Institute of Scientific and Industrial Research, Osaka University

    Department of Functionalized Natural Materials
  • 研究キーワード
    Research Keywords

    Anisotropic thermally conductive nanocellulose
    Orientation control technique
    Optical analysis
Research Subject
Functionalized materials based on intrinsic properties of nanocelluloses

研究の背景 Background


Cellulose, the most abandunt polymer on earth, has been utilized for various purposes by being converted from paper/pulps to rayon and derivatives. Despite of the long history of cellulose utilization, the novel morphology “cellulose nanofiber” has recently been developed. It is important to understand the structural features and find the quality use of these natural nanofibers for developing the functional materials contributing the sustainable low-carbon society.

研究の目標 Outcome


Cellulose is reconized as the heat insulator and traditionally used for the building insulator or insulating containers. However, the cellulose nanofiber sheets, called nanopapers, have found to show the relatively high thermal conductivity. We aimed to develop the  functional materials based on the intrinsic properties of cellulose nanofibers.

研究図Research Figure

Fig.1. Cellulose nanopapers showed the greater thermal conductivity than plastic films. The crystallite width is one factor to enhance the thermal conduction. Fig.2. Transparent and thermally conductive films consisted of the nanopaper scaffold and acrylic resin. Fig.3. ‘Nata de coco’ was mechanically drawn to align the cellulose nanofibers to form the anisotropic thermally conductive nanopaper.

文献 / Publications

Biomacromolecules 2015, 16, 2220−2227, J. Mater. Chem. C 2016, 4, 9697−9703, ACS Macro Lett. 2017, 6, 345−349, Sci. Technol. Adv. Mater. 2017, 18, 878−892.