DEVELOPMENT AND EVALUATION OF NOVEL RADICAL-TRAPPING SHEETS COMPOSED MAINLY OF CLAY
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概要
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The authors produced novel radical-trapping sheets mainly from an environmentally friendly material, natural bentonite clay. Using two identical radical-trapping reagents, their effectiveness was confirmed for high performance in active radical trapping. Radical-trapping sheets were prepared using casting from dispersion pastes including clay and radical-trapping reagents. Purified natural bentonite clay that had been treated by quaternary ammonium ions was used along with one of two radical-trapping reagents, a spin-trap reagent (α-phenyl-N-tert-butyl nitrone; PEN) or a radical-scavenging reagent (4-Oxo-2,2,6,6-tetramethylpiperidine 1-Oxyl; 4-Oxo-TEMPO), yielding 40-μm-thick flexible self-standing sheets. The sheets' radical-trapping performance was investigated using electron spin resonance (ESR). Results confirmed the radical-trapping sheets' capability for capturing active radical species that were observed neither in the original radical trap reagents nor in the clay. The PBN spin-trapping sheet trapped hydroxyl radicals and hydroxyethyl radicals. The sheet provides long-term stabilization of radical species. The trapped radicals remained active more than one month after the trapping experiment. The 4-Oxo-TEMPO radical scavenging sheet also trapped both radicals. New basal-plane reflection was observed in the X-ray diffraction (XRD) pattern of the radical-trapping sheets, suggesting intercalation of radical-trapping reagents between the clay platelet crystals. These radical-trapping sheets might be applicable to packaging, catalytic sheets for radical reactions, and environmental analyses.
- 日本粘土学会の論文
著者
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MIZUKAMI Fujio
Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and
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Mizukami Fujio
Research Center For Compact Chemical Process
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EBINA Takeo
Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and
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Ebina Takeo
Research Center For Compact Chemical Process National Institute Of Advanced Industrial Science And T
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SAKAKIBARA Kazuhisa
Department of Applied Chemistry, Graduate School of Engineering, Yokohana National University
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Sakakibara Kazuhisa
Department Of Advanced Materials Chemistry Graduate School Of Engineering Yokohama National Universi
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KAWASAKI KAZUNORI
Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and
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Kawasaki Kazunori
Research Center For Compact Chemical Process National Institute Of Advanced Industrial Science And T
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Ebina Takeo
Research Center For Compact Chemical Process National Institute Of Advanced Industrial Science And T
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Mizukami Fujio
Research Center For Compact Chemical Process National Institute Of Advanced Industrial Science And T
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