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Start Over Author "Masamitsu Funaoka" Publisher the materials research society of japan
36 results on '"Masamitsu Funaoka"'

5. Molecular Response of Lignophenols for High Energy Input

Author

Masamitsu Funaoka, Shimpei Horii, and Mitsuru Aoyagi

Subjects
chemistry.chemical_compound, High energy, chemistry, Chemical engineering, Molecular Response, Lignin, Organic chemistry, Function (mathematics)
Published
2011

7. Thermal Responses of Lignophenols

Author

Mitsuru Aoyagi and Masamitsu Funaoka

Subjects
chemistry.chemical_compound, Materials science, chemistry, Thermal, Lignin, Composite material, Glass transition
Published
2010

15. New EFB Refining System Using Structural Units of EFB Lignin

Author

Yoshihito Shirai, Takanori Shinano, Masamitsu Funaoka, and Mohd Ali Hassan

Subjects
chemistry.chemical_compound, endocrine system diseases, chemistry, Chemical engineering, Reagent, Syringol, Lignin network, Lignin, Phenol, Thermal stability, Sulfuric acid, Guaiacol, Composite material
Abstract

In order to achieve sustainable conversion of lignocellulosics through the phase-separation process, p-hydroxybenzoic acid (p-HBA) attached to core lignin through ester linkage was used as a reagent for lignin conversion. During the phase-separation treatment with p-HBA, the viscosity of reaction mixture was higher, compared with the phase-separation treatment with p-cresol. By centrifugation of the reaction mixture, the thick interfacial solid materials were formed. The yields of lignophenol, its low molecular weight fraction (separated to the organic layer) and the interfacial solid fraction were about 30%, 30% and 40%, respectively. In case of phase-separation treatment with p-cresol, the yields of lignophenol and its low molecular weight fraction (separated to the organic layer) were about 73% and 27%, respectively. The peak ratio of phenol to guaiacol plus syringol in the pyrogram of lignophenol (p-HBA type) was higher than those of lignophenol (p-cresol type) and Klason lignin. The peak of non-conjugated carbonyl group in the FT-IR spectrum of lignophenol (p-HBA type) was higher than that of the material synthesized without p-HBA. These results indicated that p-HBA was grafted to EFB lignin. The lignophenol (p-HBA type) had higher thermal stability, compared with lignophenols (p-Cresol type). The interfacial solid material between the organic and aqueous layers had higher thermal stability than sulfuric acid lignin. These results suggest the formation of lignin network through p-HBA.

Published
2009

27. Carbon Membranes from Wood Materials and their Separation Properties

Author

Kazuhiro Tanaka, Masamitsu Funaoka, Kazuhiro Uemura, Hidetoshi Kita, Tsutomu Suzuki, Isao Kawafune, and Tomoko Koga

Subjects
Membrane, Materials science, Chemical engineering, X-ray photoelectron spectroscopy, chemistry, chemistry.chemical_element, Gas separation, Pervaporation, Carbon
Published
2008

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