Bioplastics are effective in building a sustainable low-carbon society because carbon dioxide (CO2) can be fixed in the material for a long period of time.However, its use was limited due to its inferior heat resistance and mechanical characteristics, and it was mainly used in the disposable field.In 2014, the research team developed the world's most heat-resistant transparent bioplastic using cinnamon (Amino cinnamic acid derived from Escherichia coli).This is a polymer containing an imide bond called polyimide, which is the world's first bio-derived polymer in collaboration with Professor Liu Takao of National Taiwan University, who is an authority on memory development, while conducting applied research for high value-added applications. It led to the development of memory elements.

　In this research, the biopolyimide manufacturing process has been shortened from the previous 7 steps to 4 steps.Furthermore, by polymerizing by a general sol-gel method, an organic-inorganic composite of biopolyimide (organic) and titanium oxide (inorganic) was performed, and a transparent composite film was successfully formed.It can be used for volatile memory elements (data can be saved only when power is supplied) when the amount of inorganic substances is small, and for non-volatile memory elements (data can be saved without power supply) when the amount of inorganic substances is large. It turns out that there is.Furthermore, the ON / OFF ratio, which is an index leading to memory reliability, was extremely high.

　This complex is highly transparent (transparency 86-93%) and can be effectively used as a transparent memory for future-oriented transparent computers.Various effects and developments are expected, such as transparent tablets, computers that can be worn with glasses, and computers that can be attached to the windshield of automobiles.