Advanced Functional Materials Laboratory (with Osaka Municipal Technical Research Institute)
|Staff & Contact|
|Educational Staff||Visiting Prof. Yasuyuki Agari, Yutaka Fujiwara
Visiting Associate Prof. Masanari Takahashi
Education and Research Activities in the Laboratory
Polymers, ceramics and metals are materials used widely in industry. Their applications are widespread from structural uses to a variety of functional uses. We are devoted to developing these materials and their nanocomposites to be applied in advanced industry. We focus on the nanostructure control of the materials to realize next generation electronic, optical, and energy devices. Another important challenge is the development of environmental-conscious material processing technology. Our laboratory, located in the Osaka Municipal Technical Research Institute near the downtown area of Osaka city, conducts intimate collaborations with engineers from private companies to rapidly apply the developed materials to practical devices.
1. Transparent and highly thermal emissivity coating materials and highly thermal conductive materials
Super hybrid materials with nanoparticles, made up of honeycomb structures with co-continuous phases, have been developed to attain both a high thermal emissivity and light transparency, or highly thermal conductivity (> 20 W/(m K) or 10 W/(m K) with electric insulation).
2. Biomass polymer materials with unique properties
A group of environmental and functional polymer materials, poly(lactic acid), is being developed to obtain mechanical properties comparable to polyethylene, which has good moisture permeability as well as being an air barrier. As a result, poly (lactic acid) with approximately 1 of Mw/Mn can be synthesized.
3. Highly reliable wiring fabrication on flexible polymer substrates
The core technology to fabricate wiring pattern is selective polymer metallization using plating. Along with plating technology, nanoparticle fabrication and the surface treatment of polymers are fully used to develop wiring with controlled nanostructures at the metal/polymer interface.
4. Lithium ion batteries fully composed of ceramics
Our research is aimed at the development of an all solid state lithium ion battery with high safety standards and high rechargeable capacity without liquid leakage. Our approaches to fabricate this lithium ion battery are economical and ecological techniques expected to be used in industry. Core techniques employed are the aerosol deposition and the spray pyrolysis methods.
5. Control of morphology and structure of materials for electric devices
Nano-particles, nano-fibers, nano-rods, and nano-sheets are very important, promising materials for the application of electric devices, energy storage, energy conversion, and medical tools. We prepare a variety of nano-materials such as oxides, sulfides, and nitrides, and we develop new industrial applications.
Explanatory Pictures of Research Activities
- 1 Core-shell particles of phenol resin particles covered with thermal conductive BN nano-particles, which can be made of the highly thermal conductive honeycombs structures.
- Fig.2 Highly reliable nanostructure for the wiring fabrication on transparent polyimide substrate: nanointerlocked structure of polyimide and Ag nanoparticles is formed at the interface.
- Fig.3 Cross-section of an all solid state lithium ion battery. The layer by layer structure is composed of a positive electrode (LiFePO4), a solid state electrolyte (Li7SiPO7), and a negative electrode (Li4Ti5O12).
Recent Research Papers and Achievements
1. Y. Fujiwara, Y. Kobayashi, N. Higuchi, Y. Hoshiyama, and H. Miyake, “Codeposition Mechanism in Sn/Ag Nanoparticle Composite Plating”, Electrochim. Acta 89 623-630 (2013).
2. Y. Agari, H. Hirano, J. Kadota, K. Hasegawa, “Thermal conductivity of boron nitride/phenol resin composite with honeycomb structure”, International Conference on Chemical and Molecular Engineering 2012 (Zürich).
3. M. Takahashi, J. Tani, H. Kido, A. Hayashi, K. Tadanaga, and M. Tatsumisago, “Thin Film Electrode Materials Li4Ti5O12 and LiCoO2 Prepared by Spray Pyrolysis Method”, 2011 IOP Conf. Ser. Mater. Sci. Eng., 18, 122004.
1. Intimate collaborations with engineers from private companies are conducted to apply the developed materials to practical devices rapidly.
2. Our laboratory is located in Osaka Municipal Technical Research Institute near the downtown area of Osaka city.