Hosokawa Powder Technology Foundation ANNUAL REPORT
Online ISSN : 2189-4663
ISSN-L : 2189-4663
Research Grant Report
Development of Optical Sensor for Discriminating Particle Sizes
Kazuo TANAKA
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RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS

2018 Volume 26 Pages 100-104

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Abstract

Water-soluble networks containing the coumarin luminophore were prepared with polyhedral oligomeric silsesquioxane (POSS), and interaction with various particles was investigated. In particular, the relationships between optical properties of the dye in the networks and chemical composition as well as size of particles were evaluated. The POSS networks were constructed from octaammonium POSS by substituting with the coumarin derivative followed by connecting with succinic acid. From the optical measurements, we found that the coumarin-modified POSS and POSS networks showed bimodal emission spectra in aqueous solutions and changed the intensity ratio depending on their concentrations. The yellow emission of the POSS networks was influenced by coexistence of specific types of particles. The emission bands in the blue region were enhanced in the presence of polystyrene particles (PSPs) and poly(lactic acid) particles (PLAPs), meanwhile significant changes were hardly observed by adding the silica particles. Moreover, PSPs or PLAPs with the diameter no less than 1 μm slightly affected optical properties of the networks.

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https://creativecommons.org/licenses/by/2.1/jp/
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