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45 巻, 9 号
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後藤 邦彰2008 年 45 巻 9 号 p. 603
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーPDF形式でダウンロード (2287K) -
山口 明良2008 年 45 巻 9 号 p. 604-612
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーRefractories undergo severe conditions and are attacked by, e. g., slag consisting of various components at a high temperature. Therefore, the refractories have been developed with various anti-damage countermeasures. The countermeasures are “densification”, “intensification of bond among grains”, “use of components with a low dissolution for slag”, “formation of protective surface layer”, and so forth. Furthermore, the refractories will advance to become “refractory comprising self-repairing function”. The development of refractories based on the anti-damage countermeasures is described in this article.抄録全体を表示PDF形式でダウンロード (12390K) -
木原 伸一, 藤田 淳志, 弓削 輝泰, 大嶌 清史, 野中 曜, 春木 将司, 滝鳥 繁樹2008 年 45 巻 9 号 p. 613-623
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーIt is well known that carbon dioxide is one of the environmentally-benign plasticizers or solvents for polymers. However, the material properties of the mixture is not well understood and the prediction model of these properties has not been established. In this study, the shear viscosity of single-phase polymer/carbon dioxide mixture was measured using a newly-developed viscometer, and we found that the side chains in polymer alter the dependence of viscosity on pressure and carbon dioxide concentration. A novel prediction method for the shear viscosity of the polymer/carbon dioxide mixture was also proposed. In addition, polymer micronization using the effects of plasticity and bubble growth in polymeric materials, which is called the PGSS (Particles from Gas Saturated Solutions) method, has been carried out as one of the applicable processes for the polymer/carbon dioxide mixture. We found that the extensional flow caused by repeated abrupt contractions decreases the size of particles and the size distribution in the PGSS process, and that the nozzle temperature decrease due to the Joule-Thomson effect of the gas also modifies the particle size distribution and the surface morphology of particles.抄録全体を表示PDF形式でダウンロード (4517K) -
山岡 悠太, 堀 周二郎, 田口 知明, 土屋 活美, 森 康維2008 年 45 巻 9 号 p. 624-631
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーNanocomposites prepared by mixing nanoparticles into polymer are expected to have such novel functions as flame-retardant, conductive and biodegradable capabilities. Most of the current fabrication methods of nanocomposites, however, are rather complicated and require high energy. The purpose of this study is to establish a simple fabrication method of nanocomposite based on hetero-coagulation in the liquid phase where a pair of polymer latexes are mixed with inorganic particles. We focused on flame retardancy as an index of the functional novelty, and used silica particles and acrylonitrile-styrene (AS) copolymer latex. The local structure of the aggregated materials made of these two entities through hetero-coagulation was observed via scanning electron microscopy, and found to be in a well-mixed state. The thermal decomposition temperature of the nanocomposite exceeded that of pure AS resin as measured via thermogravimetric analysis under nitrogen atmosphere. From the results of cone-calorimeter measurement and horizontal burning test, it was also found that the flame retardant capability of the present nanocomposite enhanced with an increase in the amount of silica particles or a decrease in the size of silica particles.抄録全体を表示PDF形式でダウンロード (6704K) -
宮崎 重人, 西浦 泰介, 下坂 厚子, 白川 善幸, 日高 重助2008 年 45 巻 9 号 p. 632-641
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーThe formation mechanism of granules in spray drying process was investigated by DEM-CIP method simulation coupled with a new binder segregation model. To confirm the validity of proposed binder segregation model, experiment on drying of aqueous slurry containing fine particles and binder was performed. The experimental concentration distribution of binder in a dried powder bed agreed well with the simulated one and this result shows that the proposed segregation model is valid to represent segregation phenomenon in the dried granule. Spherical hollow granules were formed with increasing the binder concentration, and the granules were dimpled at a higher concentration of binder. When the binder concentration in the surface region of a slurry droplet increased during drying, a shell of granule was formed because particle migration was inhibited by high fluid viscosity. For the rigid shell, granules were hollow. When the shell was formed early in drying and its thickness was thin, granule surface partially collapsed inward, whereas the granule resulted in sinking granules.抄録全体を表示PDF形式でダウンロード (4944K) -
美崎 栄一郎, 塩見 浩之, 五十嵐 崇訓, 中尾 啓輔, 押谷 潤2008 年 45 巻 9 号 p. 642-647
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーMake-up cosmetic consisting of dispersed pigments such as titanium dioxide, iron-oxide and pearlescent pigments is one of the coloring materials. Quantitative estimation of the effect of make-up cosmetic has been a very challenging problem because the effect is very dependent on the properties of human skin.
In order to evaluate the appearance of make-up skin quantitatively, we have developed the multiangle image capturing system that has 21 digital cameras and 40 light sources that are mounted on a hemispherical gantry, and the images of object under the multiple views are captured simultaneously.
Using this system, we compared the color changes dependant on the observation angle between aged skin and beautiful skin, and then we found some differences in the specular region. Based on this result, we attempted to develop a coloring material which can give higher chroma in the specular region.抄録全体を表示PDF形式でダウンロード (1944K) -
本田 ユミ, 山本 健市, 竹本 剛史, 杉本 益規2008 年 45 巻 9 号 p. 648-656
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーIn order to continuously feed small particles into a container for wet particulate materials, an ultrasonic wet microfeeder equipped with a small disk under a nozzle was developed and the performance was evaluated under various operating conditions. The behavior of particles on the disk and their discharge rate from the microfeeder, Ni(s-1), were measured using small spherical and irregular particles. It was experimentally confirmed that the particle discharge rate Ni depended on such variables as nozzle/disk clearance, particle's shape and size, applied voltage and frequency, and disk surface roughness. By controlling the above variables appropriately, constant discharge rate could be obtained in the range of nearly 100-3000, 60-900, and 20-300s-1 respectively for spherical particles of 81, 127 and 180μm in average diameter dp.抄録全体を表示PDF形式でダウンロード (4240K) -
2008 年 45 巻 9 号 p. 657-658
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーPDF形式でダウンロード (4447K) -
梅景 俊彦2008 年 45 巻 9 号 p. 659
発行日: 2008/09/10
公開日: 2010/05/27
ジャーナル フリーPDF形式でダウンロード (144K)
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