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Volume 84, Issue 4
Displaying 1-5 of 5 articles from this issue
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Original Research Paper
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Masaaki TAKAMURA, Satoko MONOE, Takeshi YAMAUCHI, Norio TSUBOKAWA2010 Volume 84 Issue 4 Pages 127-132
Published: April 20, 2011
Released on J-STAGE: July 20, 2011
JOURNAL FREE ACCESSIn order to improve the dispersibility of carbon black (CB) in organic solvent, the grafting of poly(L-lactic acid) (PLLA) onto CB surface by (1) polycondensation of L-lactic acid (LLA) in the presence of CB and (2) grafting by the reaction of PLLA with CB surface in the presence of catalyst was investigated. It was found that, during the polycondensation of LLA in the presence of CB, the grafting of PLLA onto CB surface proceeded both in the absence and in the presence of scandium (III) triflate (Sc(OTf)3) as catalyst to give PLLA-grafted CB (1), but the percentage of PLLA grafting onto CB in the presence of Sc(OTf)3 was higher than that in the absence of Sc(OTf)3. In addition, the condensation reaction of surface functional groups on CB with PLLA was successfully achieved in the presence of Sc(OTf)3 to give PLLA-grafted CB (2). The average particle size of CB considerably decreased by grafting of PLLA onto the surface. Therefore, it was concluded that the aggregation of CB particles was considerably destroyed and prevented by grafting of PLLA onto the surface. The PLLA-grafted CBs gave a stable dispersion in polar solvents, such as DMSO and 1,4-dioxane, which are good solvents for PLLA.View full abstractDownload PDF (1788K)
Digest
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Tomotaka MIWA2010 Volume 84 Issue 4 Pages 133-137
Published: April 20, 2011
Released on J-STAGE: July 20, 2011
JOURNAL FREE ACCESSIn recent years VOC emission control has become an important subject as an environmental protection measure. Regenerative Thermal Oxidizer (RTO) which is superior in VOC abatement and fume incineration has been developed and is applicable to various purposes.
With the enforcement of Offensive Odor Control Law in Japan, auto makers who use a large amount of paints have switched to environmentally friendly paints and also adopted fume incinerator for small-medium size ovens. To meet improved plant peripheral environment conditions, more cases of VOC abatement and fume incineration of large volume spray booth exhaust are being seen.
In order to handle such large volume exhaust treatment, a large capacity RTO based on the small-medium size rotary RTO technology has been developed. Limited space exists around the ovens in the paint shop and for effective use of such space low height horizontal RTO has been developed. This type of RTO enables space utilization and shortening of supply duct resulting in enhanced fume incineration efficiency and cost reduction.
Centering on the rotary type RTO, VOC treatment related products for tackling clean emission are introduced.View full abstractDownload PDF (1979K)
Current Topics
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Yoshinobu TAMURA2010 Volume 84 Issue 4 Pages 138-143
Published: April 20, 2011
Released on J-STAGE: July 20, 2011
JOURNAL FREE ACCESSIsuzu Motors Limited is promoting paint plant modernization strategy named “Lean, Green, Compact”. This document explains the meaning and gives concrete examples of “Lean, Green, Compact”, focusing on “Isuzu Fujisawa topcoat booth” which has achieved the honor of “First no-operator topcoat booth in Japan”. Then it continues with the explanation of future energy saving plans based on no-operator condition and the most advanced energy saving technology “Dry separation of paint mist from exhaust air”.View full abstractDownload PDF (1951K)
Serial Lecture
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Hajime YAMAMOTO2010 Volume 84 Issue 4 Pages 144-151
Published: April 20, 2011
Released on J-STAGE: July 20, 2011
JOURNAL FREE ACCESSThis paper introduces key roles of phosphors in illumination, information displays and energy applications, which have become increasingly important in our lives. It focuses on photo-excited phosphors, starting from conventional phosphors for fluorescent lamps. This topic is followed by new materials for white light-emitting diodes (LEDs) and Si solar cells. Emphasis is laid on discussion of physical and chemical properties required for white LEDs as well as features of new nitride and oxynitride phosphors by comparison with conventional oxide or sulfide materials.View full abstractDownload PDF (1487K)
Serial Lecture
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Shin WATANABE2010 Volume 84 Issue 4 Pages 152-158
Published: April 20, 2011
Released on J-STAGE: July 20, 2011
JOURNAL FREE ACCESSRecently, eco-friendly products, such as solar cells, battery cars and materials not containing harmful substances, have been promoted at an accelerated pace behind the backdrop of CO2 reduction movement and ROHS/ELV directives. Additionally, in the inspection of life cycle assessment, a demand for longer lifespan guarantee of products is growing, to the extent of 20 to 30 years. Thus, accelerated weathering test apparatus that estimates the lifespan quickly and guarantees the quality of the products is needed. This apparatus is required to have “correlation” to simulate the actual degradation “acceleration” to accelerete deterioration, and “repeatability” to gain the same results any number of times. In order to achieve them, we have to consider some aspects. For example, the degradation mechanism dffers in the environments where the products are used and in processing methods of materials. Also, in outdoor exposure tests, factors such as UV amount, temperature, humidity, and rainfall vary depending on the installation location, installation method, and season. Therefore, it is important for us to measure weather factors and to know the condetions of poroducts and materials during the outdoor exposure test. Similarly, When the test apparatus is being used, the condition of of the products and materials shoude when the test apparatus is being used, the condition of the products and materials should be known.View full abstractDownload PDF (1521K)
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