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Volume 82, Issue 11
Displaying 1-7 of 7 articles from this issue
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Original Research Paper
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Kumiko SATOH, Hidetoshi HIRAHARA, Masafumi KAWAMURA, Sumio AISAWA, Eii ...2009 Volume 82 Issue 11 Pages 487-492
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSIn order to develop a new surface treatment agent, we synthesized oligo (2-butyl-2-oxazoline) (OBuOZO) having a triazinethiol moiety on the oligomer end as a novel telechelics, and carried out the coating onto copper plate with the prepared OBuOZO. First, the synthesis of the telechelics was conducted by utilizing termination of the living OBuOZO prepared by the cationic-ring-opening polymerization of 2-butyl-2-oxazoline with triazinethiol, in which the yield of the termination was 37.1%. Then, the copper plate was treated in the prepared telechelics solution to form the telechelics coating on its surface. The adsorbed amount in weight per unit surface area was obtained by mass measurement of the treated copper plate, and the changes in the surface properties were examined by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and water contact angle measurement. The results indicated that the adsorbed amount of the coating was increased with the treatment temperature and time. From contact angle measurement, the modified copper plate surface was found to become hydrophobic. From XPS and AFM analyses, the state of the telechelics coating formed onto the copper plate surface was made clear.View full abstractDownload PDF (1964K)
Note
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Mizuho HONMA, Yasuyuki KISEKI, Takeshi NISHI, Hiroyuki TERAGAKI2009 Volume 82 Issue 11 Pages 493-498
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSIn order to measure the release rate of an antifoulant in real world conditions, we have developed an on-site release rate sampler for use on actual vessels. The sampler is handy-sized and is designed for measuring release rate just after a vessel comes into dry-docking. To measure the release rate of antifoulant using this sampler, an acrylic container filled with seawater is attached to the ship’s bottom. The seawater is stirred by a propeller which is mounted inside the sampler. The copper release rate of a hydrolysis type antifouling paint from in-service vessels was measured as 10∼27 μg/cm2/day by this sampler. This result was estimated rather lower than the numerical value of mass balance calculation method.View full abstractDownload PDF (2773K)
Review
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Hirotada NONAMI2009 Volume 82 Issue 11 Pages 499-504
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSOffset ink is the color material that hardness is different from the other color materials by a style of printing, the characteristic of the press, and is high elasticity with high viscosity. In addition, the raw materials are necessarily limited because ink needs to form moderate emulsion while being a style of printing that use the repulsion of oil and water in the surface. I ascend up to the production stage of apigment at a point of the pigment dispersion in the offset ink. I explain about the condition of pigment dispersion, the characteristic of the pigment, a dispersion method and process of manufacture such as dispersion machines, an evaluation method of the dispersibility and influence to the printability. As for the pigment dispersion in the offset ink, the dispersion level strongly influence squality, and it is important to improve dispersibility from the sides of the both chemical and physical aspect.View full abstractDownload PDF (3646K)
Digest
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Reiji MIYAHARA2009 Volume 82 Issue 11 Pages 505-509
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSThis study presents a novel emulsifying method by which ultrafine emulsions of particle size less than 100 nm can be easily prepared using polyoxyethylene(POE)/polyoxypropylene(POP) random co-polymer dimethylether [EPDME].
The effect of EPDME on self-organizing structures of pentaethyleneglycol dodecylether (C12E5) was investigated. The results indicated that [1] a special micelle containing oil might be formed when the cohesive force of the hydrophobic groups of C12E5 increased by solubilizing liquid paraffin, [2] EPDME distributed to the hydrophilic chain of C12E5, and [3] the curvature of the interfacial film became positive.
The equilibrium phase state of the water-oil-surfactant-EPDME was examined so as to clarify the mechanism in the preparation of ultrafine emulsions and the results indicated the following : [1] a special microemulsion phase is formed in a region different from that of the normal microemulsion phase when oil, EPDME, surfactant and water are mixed in the proper proportions and [2] ultrafine emulsions form in a two-phase region (O+Wm) when the microemulsion phase is diluted with water.
EPDME may be considered a hydrophilic co-surfactant and a special microemulsion phase is formed at high EPDME and polyoxyethylene nonionic surfactant. EPDME may possibly be distributed in the polyoxyethylene chain of the polyoxyethylene surfactant. When diluting this microemulsion phase, EPDME rapidly decreases in concentration and, may diffuse in the bulk water phase from polyoxyethylene chains in surfactants. Thus, an ultrafine emulsion consisting only of nonionic surfactant and oil forms.View full abstractDownload PDF (1028K) -
Yoshinori HARA2009 Volume 82 Issue 11 Pages 510-515
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSDownload PDF (3618K)
Current Topics
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Naoto SHIRAHATA, Yoshio SAKKA2009 Volume 82 Issue 11 Pages 516-521
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSThe quantum confinement effect, which generates by creating a semiconductor crystal on the order or smaller than the bulk exciton Bohr radius, has fueled tremendous interests in a range of optical and optoelectronic applications including photovoltaic devices, full-color displays, sensors, laser oscillation, light-emitting diodes, and biological fluorescence tags. In addition to superior stability against photobleaching compared to organic fluorescent dyes, size-tunable photoluminescence (PL) from the quantum dots (QDs) has spurred enormous growth in their fundamental research and development activities. In this review, silicon which is one of the environmentally friendly QDs is highlighted, and the recent development on its surface chemical functionalization is reviewed. For examples, the well-designed surfaces with organic monolayers creates the opportunity (i) to control the radiative recombination of photoexcited electrons between the ground electron and hole states in the subbands formed in nanostructures of silicon, and (ii) to give high affinity for biomolecular recognition. The industrial use of luminescent silicon provides the unsurpassed compatibility with current microelectronics, and a high chemical affinity for C, O, and N for covalent linkages, thereby producing a variety of its organic derivatives hybridized at the molecular level.View full abstractDownload PDF (2214K)
Serial Lecture
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Yoshihiro IWASA2009 Volume 82 Issue 11 Pages 522-527
Published: November 20, 2009
Released on J-STAGE: February 20, 2010
JOURNAL FREE ACCESSFullerene is a family of cage-structured spherical molecules composed mainly of carbon atoms. Among them, the succor ball shaped C60 is well known for its superior properties and functions in physics, chemistry, biology, and electronic engineering, particularly in superconductivity and application to organic electronics. This article provides a brief review on the fundamentals and applications of solid state and thin films of fullerenes.View full abstractDownload PDF (1774K)
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