[20p-P08-1~22] 12.1 Fabrications and Structure Controls

[20p-P08-22] Mechanical Treatment of Mechanochromic Material showing Visual Color Change and Application for Inkjet Printing

〇Keisuke Ogumi^1,2, Kohki Nagata¹, Yuki Takimoto¹, Kentaro Mishiba¹, Yutaka Matsuo^2,3 (1.TIRI, 2.InFuS, 3.Nagoya Univ.)

Keywords:

mechanochromism,nano particles,inkjet printing

Mechanochromic materials have a serious problem which is mechanical treatment cannot be applied to the materials because of their responsiveness to stimuli. In this study, we found our original mechanochromic material exhibiting visual color change responds not only to mechanical pressure but also to alcohol. Alcohol restores the color change by mechanical pressure and inhibits mechanochromism. Using this phenomenon, minute particles of this material were obtained by bead milling in ethanol and investigated for uniformity and size by scanning electron microscopy and gas adsorption measurement. Also, ink containing the particles was prepared and examined for physical properties such as viscosity and surface tension. It was confirmed that the inkjet-printed pattern demonstrated visual color changes between yellow and green in response to mechanical pressure and alcohol.