A simple manufacturing process of nano / micro structures using a freeze drying method

2014 Fiscal Year Final Research Report

• Project/Area Number: 24651149
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials/Nanobioscience
• Research Institution: Fukuoka Industrial Technology Center
• Principal Investigator: KIMURA Taro 福岡県工業技術センター, 化学繊維研究所, 専門研究員 (40416491)
• Co-Investigator(Kenkyū-buntansha): UCHIYAMA Naoyuki 福岡県工業技術センター, 化学繊維研究所, 研究員 (10502247) ; SAITA Shingo 福岡県工業技術センター, 化学繊維研究所, 研究員 (20502248)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 凍結乾燥 / ナノファイバー / 多孔質体 / 多糖 / 水溶性高分子 / アルミナ

Outline of Final Research Achievements

There are increasing requirements worldwide for nanofiber sheet as support for catalysis, advanced filter, substrate of cell culture, etc. However, the nanofiber of the current state is too expensive to use it as common products, because huge investment in the equipment and precise operation are necessary for production of a nanofiber.
Here we report the fabrication of various nano / micro structures, based on a freeze-drying technique from aqueous polymer solution. By changing the polymer species and the concentration of the solution, particle, nanofiber and microfiber were obtained. Especially PVP, PEO, and SPG could form nanofiber 200 nm in diameter uniformly. Moreover, it was indicated that freeze speed and drying rate has influence with nanostructures. These results are expected as a simple and low-cost production technique of nanofiber.

Free Research Field

高分子化学