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Volume 89, Issue 4
Displaying 1-6 of 6 articles from this issue
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Original Research Paper
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Kenji TAKAI, Mitsuharu MATSUZAWA, Shingo TAMESUE, Takeshi YAMAUCHI, No ...2016 Volume 89 Issue 4 Pages 107-112
Published: April 20, 2016
Released on J-STAGE: July 20, 2016
JOURNAL FREE ACCESSIn the electronics field, monodisperse hydrophobic particles in the submicron size are used as additives for adhesives. The purpose of this study is to develop a process to synthesize monodispersed poly(alkoxysilane) (silicone) particles that have strong hydrophobicity. Dimethyldimethoxysilane (DMDMS), methyltrimethoxysilane (MTMOS), and tetraalkoxysilanes, such as tetramethoxysilane (TMOS) and tetraethoxysilane (TEOS), were used as monomers for synthesizing the hydrophobic silicone particles. By optimizing the alkoxysilane concentration, the blending ratio of monomers, the amount of catalyst and the reaction temperature, it is possible to synthesize small monodispersed silicone particles.View full abstractDownload PDF (3731K) -
Shoya IMAMOTO, Daichi KONNO, Hiroaki KOUZAI2016 Volume 89 Issue 4 Pages 113-116
Published: April 20, 2016
Released on J-STAGE: July 20, 2016
JOURNAL FREE ACCESSIn this study, we synthesized phenothiazine monomer containing methoxybenzene and dimethyl aniline groups. We then carried out copolymerization with dioctylfluorene boron compound using Suzuki-Miyaura coupling reaction. As a result, number average molecular weight (Mn) of obtained polymers were 2700～2900, weight average molecular weight (Mw) were 4300～5700, molecular weight distribution were 1.7～2.0. These polymers were soluble in organic solvents such as toluene and chloroform. In the TG measurement, 10% thermogravimetric loss temperature of polymers occurred at 390～400℃ indicating good thermal stability. In the fluorescence spectrum measurements, a THF solution of PMBPOF were observed peaks at 420 nm and 460 nm, showing a blue emission. In addition, the fluorescence spectrum of PMBPOF film revealed a peak at 480 nm, a light blue emission. Similarly, PDMAPOF also showed photoluminescence for both the THF solution and film.View full abstractDownload PDF (4207K)
Current Topics
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Daigou MIZOGUCHI, Yuta MIYAZAWA, Masato MUROUCHI2016 Volume 89 Issue 4 Pages 117-121
Published: April 20, 2016
Released on J-STAGE: July 20, 2016
JOURNAL FREE ACCESSThe synthesis method and applications of plate-shaped silver nanoparticles, so-called “silver nanoplates”, have been studied because of their unique shape and dependence of optical properties on the aspect ratio. Silver nanoplates show vivid color due to localized surface plasmon resonance (LSPR) of their surface free electrons with visible-near infrared light. We introduce several synthesis methods of silver nanoplates and explain their potential as color materials based on their optical properties. In particular we report the use of silver nanoplates as multicolor materials in diagnostic products for immunochromatography methods.View full abstractDownload PDF (6364K) -
－Development of Self-Healing Materials Using Host-Guest Interactions－Akira HARADA, Yoshinori TAKASHIMA, Akihito HASHIDZUME, Hiroyasu YAMAGU ...2016 Volume 89 Issue 4 Pages 122-128
Published: April 20, 2016
Released on J-STAGE: July 20, 2016
JOURNAL FREE ACCESSRecent status of the studies on self-healing polymeric materials is described. Self-healing materials have been developed by using dynamic covalent bonds, hydrogen bonds, metal-ligand interactions, and host-guest interactions. This review article mainly focuses on macroscopic self-assembly and self-healing process through molecular recognition. Selective assembling, sol-gel switching, photo-switching, solvent-switching systems are described.View full abstractDownload PDF (2727K)
Serial Lecture
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Makoto KATOH2016 Volume 89 Issue 4 Pages 129-134
Published: April 20, 2016
Released on J-STAGE: July 20, 2016
JOURNAL FREE ACCESSTo the human eye the color degree information and texture information in an image is mixed, and we judge artificially. In a conventional spectrum colorimeter these two types of information are also mixed and are measured as an average value. Therefore, it poses a problem that the information actually seen by the human eye and the measured numerical value are not consistent. Such type of problems frequently occur in various industries, reducing the cost effectiveness of inspection work.
A two-dimensional colorimeter is a new assessment system by which the color and textures of a subject are united and evaluated in comparison to the conventional spectrum system and which correctly assesses the average color of a fixed area. This revolutionary color management technique is compared with the conventional color measurement system using this equipment.View full abstractDownload PDF (2425K)
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Kei WATANABE2016 Volume 89 Issue 4 Pages 135-138
Published: April 20, 2016
Released on J-STAGE: July 20, 2016
JOURNAL FREE ACCESSEmulsification and solubilization are the most important functions of a surfactant. They are used in the cosmetic, food, ink, paint and other industries. In principle an emulsion is a thermodynamically non-equilibrium state that differs from a microemulsion (solubilized solution), a thermodynamically equilibrium state. However for the sake of preparation and stabilization of emulsions an understanding of solubilization helps greatly.
In this article, the basic theory of emulsion and solubilization is presented, followed by a concrete methodology and examples of applications.View full abstractDownload PDF (1143K)
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