研究者詳細 - 上野　智永

論文 - 上野　智永

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Crystallinity and surface state of cellulose in wet ball-milling process

Nemoto, S; Ueno, T; Watthanaphanit, A; Hieda, J; Saito, N

JOURNAL OF APPLIED POLYMER SCIENCE 134 巻 ( 22 ) 2017年6月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Applied Polymer Science

We report the effect of wet ball-milling process under mild neutral salt conditions on the alteration of crystallinity and surface state of microcrystalline cellulose (MC). The ball-milling experiments were performed when the MC was immersed in H2O, NaCl aqueous solution, and KCl aqueous solution. Two collation groups, i.e., MC immersed in H2O2 and nonimmersed MC were additionally investigated for comparison. Except when H2O2 was present, the highest decrease in the cellulose crystallinity index (CI) was observed in dilute KCl. On the other hand, the CI of wet-milled MC/NaCl was greater than that of the wet-milled MC/H2O, however, still lower than that of the non-immersed MC. XPS results showed that the carbonization progressed in dry-milled MC and wet-milled MC/NaCl surfaces. Though, the surface oxidization progressed in wet-milled MC/H2O and wet-milled MC/KCl. Lastly, the ball-milling processes in different solutions led to various decreases of the crystallinity and the surface degradation due to carbonization and/or oxidization. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44903.

DOI： 10.1002/APP.44903

Web of Science

Scopus

ソリューションプラズマを用いて作製した酸化亜鉛ナノ粒子の粒径に及ぼすプラズマ生成パラメータの影響査読有り

根本心平、上野智永、Anyarat Watthanaphanit、稗田純子、齋藤永宏

表面技術 68 巻 ( 3 ) 頁： 147-152 2017年

逆ミセル構造を利用するソリューションプラズマ合成ナノカーボンの比表面積制御査読有り

森下哲典,上野智永,吉田彰仁, 稗田純子, 齋藤永宏

表面技術 68 巻 ( 3 ) 頁： 153-157 2017年

New insights into vegetable oil pyrolysis by cold plasma technique

Meeprasertsagool Phimpaka, Watthanaphanit Anyarat, Ueno Tomonaga, Saito Nagahiro, Reubroycharoen Prasert

2017 INTERNATIONAL CONFERENCE ON ALTERNATIVE ENERGY IN DEVELOPING COUNTRIES AND EMERGING ECONOMIES 138 巻頁： 1153 - 1158 2017年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Energy Procedia

Green liquid fuels are alternatively produced by pyrolysis of vegetable oil. Still, this process requires high processing temperature and high energy consumption per unit cost. Recently, solution/liquid-phase plasma (cold plasma) is the novel method to provide the direct energy at highly excited energy state. In this study, the investigation of the green fuel synthesis from vegetables oils using cold plasma was examined. The cold plasma reactor was connected to a bipolar pulsed power supply under 200 ml of palm oil, the pulse frequency adjusted from 15-45 kHz and the voltage adjusted in ranges of 1.2-1.5 kV with 40 minutes of discharge times, pulse width 2 μs, electrode distance 0.5 mm. Properties of generated plasma were investigated by optical emission spectroscopy (OES) methods. The liquid products were analysed by GC-MS. In order to identify components of the liquid product, a GC-MS chromatogram was carried out; the main peaks were oleic acid and palmitic acid. Therefore, the other peak showed which products were cracked to short-chain hydrocarbon and hexadecane was one of the compounds which were cracked in palm oil. In conclusion, the results showed that plasma has potential and enough energy to convert vegetable oils in liquid fuels at room temperature which can also provide the direct energy better than pyrolysis.

DOI： 10.1016/j.egypro.2017.10.224

Web of Science

Scopus

Synthesis of carbon nanoparticles from used motor oil and benzene via solution plasma process

Seangarunthong N., Khongthong P., Panomsuwan G., Ueno T., Saito N., Eiad-Ua A.

Key Engineering Materials 751 KEM 巻頁： 773 - 778 2017年

記述言語：日本語出版者・発行元：Key Engineering Materials

Carbon nanoparticles (CNPs) were successfully synthesized from the mixture of used motor oil and benzene via a solution plasma process (SPP). The synthesis was achieved within a single step at room temperature and atmospheric pressure. The effects of mixing ratio between used motor oil and benzene on the physical and chemical properties of CNPs were investigated by means of field-emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Raman spectroscopy. The results revealed that there were no significant changes in morphological feature and chemical functional groups on CNPs at different mixing ratios. The CNPs exhibited the aggregates of fine particles with the diameter of about 20-30 nm. The crystallinity of CNPs was found to be slightly increased when synthesized under the presence of used motor oil, possibly due to the effect of aliphatic hydrocarbons and polycyclic aromatic hydrocarbons in used motor oil. We expect that the conversion of used motor oil into CNPs by SPP could be another attractive way to add the value to used motor oil prior to disposing.

DOI： 10.4028/www.scientific.net/KEM.751.773

Scopus

Differences in intermediate structures and electronic states associated with oxygen adsorption onto Pt, Cu, and Au clusters as oxygen reduction catalysts 査読有り

T Morishita, T Ueno, G Panomsuwan, J Hieda, MA Bratescu, N Saito

Journal of Physics D: Applied Physics 49 巻 ( 41 ) 頁： 415305 2016年9月

DFT calculation of oxygen adsorption on a core-single shell ZnNb catalyst 査読有り

Tetsunori Morishita, Tomonaga Ueno, Gasidit Panomsuwan, Junko Hieda, Maria Antoaneta Bratescu, Nagahiro Saito

RSC Advances 6 巻 ( 100 ) 頁： 98091-98095 2016年9月

ソリューションプラズマ－スパッタ法を用いた金ナノ粒子合成速度に与える溶媒組成の影響査読有り

簾智仁, 上野智永, ワッタナパーニット　アンヤラット, 齋藤永宏

表面技術 67 巻 ( 2 ) 頁： 1 2016年2月

Synthesis of heteroatom-carbon nanosheets by solution plasma processing using N-methyl-2-pyrrolidone as precursor 査読有り

K. Hyun, T. Ueno, O. L. Li, N. Saito

RSC Advances 6 巻 ( 9 ) 頁： 6990-6996 2016年

Heterocarbon nanosheets incorporating iron phthalocyanine for oxygen reduction reaction in both alkaline and acidic media 査読有り

K. Hyun, T. Ueno, G. Panomsuwan, O. L. Li, N. Saito

Physical Chemistry Chemical Physics 18 巻 ( 16 ) 頁： 10856-10863 2016年

Fastest Formation Routes of Nanocarbons in Solution Plasma Processes

Tetsunori Morishita, Tomonaga Ueno, Gasidit Panomsuwan, Junko Hieda, Akihito Yoshida, Maria Antoaneta Bratescu, Nagahiro Saito

Scientific Reports 6 巻頁： 36880 2016年

Synthesis of nitrogen-containing carbon by solution plasma in aniline with high-repetition frequency discharges 査読有り

K Hyun, T Ueno, N Saito

Japanese Journal of Applied Physics 55 巻 ( 1S ) 頁： 01AE18 2015年12月

Verification of Radicals Formation in Ethanol Water Mixture Based Solution Plasma and Their Relation to the Rate of Reaction

T Sudare, T Ueno, A Watthanaphanit, N Saito

The Journal of Physical Chemistry A 119 巻 ( 48 ) 頁： 11668-11673 2015年11月

The Effect of Electrode Gap Distance on the Synthesis of Carbon Materials by Using Solution Plasma Process 査読有り

H Lee, T Ueno, N Saito

JOM 67 巻 ( 11 ) 頁： 2550-2556 2015年11月

ナフタレンおよびアントラセンの微量添加によるソリューションプラズマ合成カーボン材料の導電性向上査読有り

リフンソン, 上野智永, 齋藤永宏

表面技術 9 巻頁： 0 2015年9月

Accelerated nanoparticles synthesis in alcohol water mixture based solution plasma 査読有り

T Sudare, T Ueno, A Watthanaphanit, N Saito

Physical Chemistry Chemical Physics 17 巻 ( 45 ) 頁： 30255-30259 2015年

Synthesis of mono-dispersed nanofluids using solution plasma 査読有り

YK Heo, MA Bratescu, T Ueno, N Saito

Journal of Applied Physics 116 巻 ( 2 ) 頁： 024302 2014年

Pyrolysis and Combustion of Polystyrene and Polypropylene with Different Molecular Weights 査読有り

E Nakashima, T Ueno, R Ichino, K Takeda

KOBUNSHI RONBUNSHU 71 巻 ( 4 ) 頁： 159-168 2014年

Autonomous viscosity oscillation via metallo-supramolecular terpyridine chemistry of branched poly (ethylene glycol) driven by the Belousov-Zhabotinsky reaction 査読有り

T Ueki, Y Takasaki, K Bundo, T Ueno, T Sakai, Y Akagi, R Yoshida

Soft matter 10 巻 ( 9 ) 頁： 1349-1355 2014年

Solution plasma exfoliation of graphene flakes from graphite electrodes 査読有り

H Lee, MA Bratescu, T Ueno, N Saito

RSC Advances 4 巻 ( 93 ) 頁： 51758-51765 2014年

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