2012 Fiscal Year Final Research Report
Sonochromic device changing with sound stimuli
| Project/Area Number |
22656180
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Reaction engineering/Process system
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | 超音波 / ポリマー / ソノケミストリー / 吸収スペクトル変化 / クロミズム |
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| Research Abstract |
Sonochromic device changing with sound stimuli
This research project is focused on sonochromic device changing with sound stimuli. The subject was studied with ultrasound equipments, which could expose ultrasound having 23 to 143kHz frequencies to aqueous components of polymers and dyes. The idea on this research was applied to be monitored absorption spectra of visible and infrared regions after the ultrasound exposed. Actually resultant data implied that ultrasound influenced the spectral changes of aqueous polymer solution including water-soluble dye, quaternary azopridium benzene. The results suggest that the ultrasound exposure with 43 kHz frequency enhanced the dye aggregation in the aqueous soluble polymer solution for poly acrylic acid. In addition with these results, the research found evidence on that ultrasound exposure extremely reduced the polymer solution viscosity. Infrared analysis also supported that ultrasound broke hydrogen bondings in the polymers.But, the breaking of the polymer was recovered without the exposure to the original condition without decomposition. These results indicated that ultrasound could control the hydrogen bonding breaking and formation in the aqueous polymers. There is possibility to apply this phenomena for new device to sound stimuli-chromism.
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