Papers - YAMAMOTO Tetsuya

Effect of electrolyte species on size of particle through soap-free emulsion polymerization of styrene using AIBN and electrolyte Reviewed

Tetsuya Yamamoto, Kan Kawaguchi

COLLOID AND POLYMER SCIENCE   Vol. 293 ( 3 ) page： 1003 - 1006   2015.3

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER  

The addition of electrolyte to a soap-free emulsion polymerization using oil-soluble initiator, 2,2'-azobis(2-methylpropionitrile) (AIBN), was useful for production of the micron-sized polystyrene particle. To investigate the effect of electrolyte species on particle size, we focus on the counter ion and ionic radius of the cation during the synthesis of the particle. As a result, because the order of acid dissociation constant of the acid was HCl < HNO3 < CH3COOH, the suspension using chloride salt has lower pH and included the larger particles due to the coagulation growth process. Cation with a larger ionic radius could promote the particle growth strongly because its hydration was so weaker that it had the ability to reduce the thickness of the electrical double layer of negatively charged polystyrene particle. In summary, the addition of strongly acidic salt with larger cationic radius to the polymerization was efficient for making the size of polystyrene particle larger.

DOI： 10.1007/s00396-015-3511-1

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Other Link： http://orcid.org/0000-0001-8179-900X

Particle size measurement of reference particle candidates and uncertainty region of count and mass based cumulative distribution Reviewed

H. Yoshida, T. Yamamoto, Y. Mori, H. Masuda, K. Okazaki and H. Sugasawa

Advanced Powder Technology   Vol. 25 ( 6 ) page： 1748 - 1753   2014.12

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.apt.2014.07.001

乾式サイクロンの入口清浄空気および案内羽根が粒子分級性能に与える影響 Reviewed

竹田尚広, 忍足輝男, 山本徹也, 福井国博, 吉田英人

粉体工学会誌   Vol. 51 ( 9 ) page： 614 - 622   2014.9

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.4164/sptj.51.614

Development of Novel Technique for Separation, Classification and Surface Modification of Particle using Dry-Cyclone with Mist Invited

Annual Report of Hosokawa Powder Technology Foundation   Vol. 21   page： 101 - 106   2014.5

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

DOI： 10.14356/hptf.12112

電場印加型の垂直流型水篩による微粒子の高精度分級 Reviewed

松沢光晴，高井健次，坂本裕太郎，村上公威，福井国博，山本徹也，吉田英人

粉体工学会誌   Vol. 51 ( 2 ) page： 68 - 76   2014.2

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.4164/sptj.51.68

Theoretical calculation of uncertainty region for spherical particles based on a picket fence, quasi-monodisperse particles, Reviewed

Yoshida, H., H. Sunagawa, K. Fukui, T. Yamamoto, and H. Masuda

Advanced Powder Technology   Vol. 25 ( 2 ) page： 524 - 529   2014

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.apt.2013.08.008

粒子表面特性に基づいた分級操作とミクロン粒子の調製 Invited

山本徹也，吉田英人

ケミカルエンジニアリング   Vol. 58 ( 11 ) page： 40 - 43   2013.11

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (other academic)  

Synthesis of nearly micron-sized particles by soap-free emulsion polymerization of methacrylic monomer using an oil-soluble initiator Reviewed

Yamamoto, Tetsuya

Colloid and Polymer Science   Vol. 291 ( 11 ) page： 2741 - 2744   2013.11

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s00396-013-3059-x

Effect of free air inflow method on fine particle classification of gas-cyclone Reviewed

Hiraiwa, Yusuke Oshitari, Teruo Fukui, Kunihiro Yamamoto, Tetsuya Yoshida, Hideto

Separation and Purification Technology   Vol. 118   page： 670 - 679   2013.10

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.seppur.2013.08.009

Effect of packing fraction on indium tin oxide powder synthesis via a solid-phase reaction with microwave heating Reviewed

Fukui, Kunihiro Katoh, Manabu Saeki, Yuta Yamamoto, Tetsuya Yoshida, Hideto

Chemical Engineering Science   Vol. 98   page： 17 - 24   2013.7

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.ces.2013.05.012

Hydrodynamic boundary condition of water on hydrophobic surfaces Reviewed International coauthorship

Schaeffel, David Yordanov, Stoyan Schmelzeisen, Marcus Yamamoto, Tetsuya Kappl, Michael Schmitz, Roman Duenweg, Burkhard Butt, Hans-Juergen Koynov, Kaloian

Physical Review E   Vol. 87 ( 5 ) page： 051001   2013.5

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1103/PhysRevE.87.051001

A new method of zeta-potential measurement by the use of the sedimentation balance method Reviewed

Yoshida, Hideto Tatekawa, Takahisa Fukui, Kunihiro Yamamoto, Tetsuya Takai, Kenji Matuzawa, Mitsuharu

  Vol. 237   page： 303 - 308   2013.3

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.powtec.2012.12.011

Mechanism of synthesis of metallic oxide powder from aqueous metallic nitrate solution by microwave denitration method Reviewed

Fukui, Kunihiro Igawa, Yusuke Arimitsu, Naoki Suzuki, Masahiro Segawa, Tomoomi Fujii, Kan-ichi Yamamoto, Tetsuya Yoshida, Hideto

Chemical Engineering Journal   Vol. 211   page： 1 - 8   2012.11

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.cej.2012.09.032

Soap-free emulsion polymerization of aromatic vinyl monomer using AIBN Reviewed

Yamamoto, Tetsuya

Colloid and Polymer Science   Vol. 290 ( 17 ) page： 1833 - 1835   2012.11

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s00396-012-2807-7

粒子表面物性を利用した微粒子分級システムの開発 Invited

山本徹也

粉体工学会誌   Vol. 49 ( 11 ) page： 832 - 836   2012.11

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Authorship：Lead author,　Corresponding author   Language：Japanese  

Synthesis of micron-sized polymeric particles in soap-free emulsion polymerization using oil-soluble initiators and electrolytes Reviewed

Yamamoto, Tetsuya

Colloid and Polymer Science   Vol. 290 ( 11 ) page： 1023 - 1031   2012.7

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Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s00396-012-2618-x

Effect of conical length on separation performance of sub-micron particles by electrical hydro-cyclone Reviewed

Yoshida, Hideto Hayase, Yuuki Fukui, Kunihiro Yamamoto, Tetsuya

Powder Technology   Vol. 219   page： 29 - 36   2012.3

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.powtec.2011.12.002

Theoretical calculation of uncertainty region based on the general size distribution in the preparation of standard reference particles for particle size measurement Reviewed

Yoshida, Hideto Yamamoto, Tetsuya Fukui, Kunihiro Masuda, Hiroaki

Advanced Powder Technology   Vol. 23 ( 2 ) page： 185 - 190   2012.3

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.apt.2011.01.011

焼結金属製円錐を持つ液体サイクロンの分級特性 Reviewed

村重佳奈，福井国博，西田幸生，山本徹也，吉田英人

粉体工学会誌   Vol. 49   page： 367 - 373   2012

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.4164/sptj.49.367

改良型の乾式サイクロンによる粒子分離性能の向上 Reviewed

竹田尚広，西村洋佑，小澤和三，山本徹也，福井国博，吉田英人

粉体工学会誌   Vol. 48 ( 12 ) page： 840 - 846   2011.12

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.4164/sptj.48.840