図1 液相3Dパターニング技術によるナノセルロース配向フィルムの開発コンセプト
図2 開発したナノセルロース多軸配向フィルム
阪大:ナノセルロースを自由に配列/集積:液相3Dパターニング開発(動画):
Osaka Univ.: Arrangement/assembly of nanocellulose freely: liquid phase 3D patterning:
大阪大学:纳米纤维素的自由布置/组装:液相3D图案开发
大阪大学;
ナノセルロースを「配列させながら、自在な構造に集積する液相3Dパターニング技術」を発表しました。
ナノセルロースを複数方向に配列させた多軸配向フィルムを開発。
光学位相差や遅相軸、熱伝搬性の制御性を、確認することができました。
利用分野:
次世代/光学機能性部材やペーパーエレクトロニクス/高性能化で、利用の予定。
- 省エネ化に向けた熱制御、
- 光マネジメントが可能なフィルム、
- 光マネジメントが可能な紙材料等、
RESOU
https://resou.osaka-u.ac.jp/ja/research/2020/20200520_2
Checkered Films of Multiaxis Oriented Nanocelluloses by Liquid-Phase Three-Dimensional Patterning
May 2020Nanomaterials 10(5):958
DOI: 10.3390/nano10050958
Authors:
Kojiro Uetani
Hirotaka Koga at Osaka University
Masaya Nogi
Abstract and Figures
It is essential to build multiaxis oriented nanocellulose films in the plane for developing thermal or optical management films.
However,using conventional orientation techniques,
it is difficult to align nanocelluloses in multiple directions within the plane of single films rather than in the thickness direction like the chiral nematic structure.
In this study,
we developed the liquid-phase three-dimensional (3D) patterning technique by combining wet spinning and 3D printing.
Using this technique,
we produced a checkered film with multiaxis oriented nanocelluloses.
This film
showed similar retardation levels, but with orthogonal molecular axis orientations in each checkered domain as programmed.
The thermal transport
was enhanced in the domain with the oriented pattern parallel to the heat flow.
This liquid-phase 3D patterning technique
could pave the way for bottom-up design of differently aligned nanocellulose films to develop sophisticated optical and thermal materials.