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Volume 36 (2011)
- Issue 6 Pages 271-
- Issue 5 Pages 203-
- Issue 4 Pages 128-
- Issue 3 Pages 83-
- Issue 2 Pages 49-
- Issue 1 Pages 1-
Volume 36, Issue 2
Displaying 1-6 of 6 articles from this issue
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Foreword
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[in Japanese]2011 Volume 36 Issue 2 Pages 49
Published: 2011
Released on J-STAGE: July 14, 2012
JOURNAL OPEN ACCESSDownload PDF (496K)
Special Topic : Recent advances in film & sheet technologies
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Kyoichi Saito, Kazuyoshi Miyoshi2011 Volume 36 Issue 2 Pages 50-56
Published: 2011
Released on J-STAGE: July 14, 2012
JOURNAL OPEN ACCESSThe improvement of ion-exchange membranes used for the electrodialysis of seawater is demanded to reduce the production cost of salt. Instead of the conventional paste method, the electron-beam-induced graft polymerization was proposed as a novel method for the preparation of the ion-exchange membranes using commercially available polymeric films as a starting material. The resultant ion-exchange membranes based on high-density polyethylene and 6-nylon films exhibited a higher performance in electrodialysis of a model seawater than the currently-used ionexchange membranes. Polymeric structure such as crystallite size and spacing during grafting and subsequent chemical modifications was characterized by X-ray diffraction, small-angle X-ray scattering, and small-angle neutron scattering. The channel for the transport of ions through the membranes is discussed.View full abstractDownload PDF (891K)
Review Article
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Asami Funatsu, Yoshiro Tahara, Sakurako Yamanaka, Masahiro Goto2011 Volume 36 Issue 2 Pages 57-62
Published: 2011
Released on J-STAGE: July 14, 2012
JOURNAL OPEN ACCESSIn this article, we report a novel oil gel sheet, which is contained ascorbic acid and hyaluronic acid as an ingredient of cosmetics. An efficient permeation method of the ingredients into a deep skin would be a key technology to develop novel functional cosmetics. The outer surface of the skin that is stratum corneum has a strong barrier to avoid the invasion of hazardous materials into our body. The barrier function causes the difficulty in the transport of effective ingredients into a deep region of our skin. To overcome this problem, solid-in-oil (S/O) nano dispersion technique has been developed by coating the ingredients with hydrophobic surfactant molecules. The coated hyaluronic acid was well dispersed in an oil phase and its permeation rate into the skin was significantly enhanced by the formation of the complex. An oil gel sheet was created by utilizing the S/O techniques for ascorbic acid and hyaluronic acid. The oil gel sheet could improve the moisture condition of faces by using at least 30 minutes.View full abstractDownload PDF (1165K) -
Taichi Ito, Yukimitsu Suzuki2011 Volume 36 Issue 2 Pages 63-70
Published: 2011
Released on J-STAGE: July 14, 2012
JOURNAL OPEN ACCESSPostoperative peritoneal adhesions cause pelvic pain, infertility, and potentially lethal bowel obstruction. We have designed and synthesized injectable hydrogels that are formed by mixing hydrazide-modified hyaluronic acid (HA) with aldehyde-modified versions of cellulose derivatives such as carboxymethylcellulose (CMC), hydroxypropylmethyl cellulose (HPMC), and methyl cellulose (MC). Hydrogels degraded in the presence of hyaluronidase in vitro, with HA-MC and HA-HPMC degrading more slowly than HAX and HA-CMC. All the cellulose-derived gels showed efficacy in reducing the area of adhesion formation in a rabbit sidewall defect-bowel abrasion model. In addition, we have designed and synthesized an injectable hydrogel composed of cross-linkable modified hyaluronic acids conjugated to dexamethasone, and investigated its anti-inflammatory function. The hydrogel degraded in media over 5 days, releasing dexamethasone slowly over that time preventing TNF-α production from lipopolysaccharide-stimulated primary mousice macrophages in vitro. Further research is on-going. We are designing cisplatin releasing system based on this in-situ crosslinkable hydrogel system for treating peritoneal dissemination.View full abstractDownload PDF (886K) -
Hidenori Ohashi, Takeo Yamaguchi2011 Volume 36 Issue 2 Pages 71-78
Published: 2011
Released on J-STAGE: July 14, 2012
JOURNAL OPEN ACCESSMolecular diffusivities in polymeric system are important dynamic properties for design of gas barrier/vapor permeation membranes. The number of combination between polymers, penetants, and temperature is quite huge, and diffusivity prediction model in polymeric system is highly required. In order to attain the prediction model that can estimate molecular diffusivity in polymer by using only single component parameters and not using any adjustable parameter, microscopic viewpoint of molecular diffusive motion has been considered. Concretely, microscopic molecular collisions with adjacent molecules have been introduced into the existent free volume model as shell-like free volume around a penetrant molecule. As a result, a diffusivity prediction model in polymer matrices has been achieved for the first time. The required parameters for the predictive calculation are free volume, molecular surface area, and molecular volume of each single component, and in this study, they are calculated using viscoelastic property, semi-empirical quantum chemical calculation, and group contribution method respectively. The predictive ability of the model with the parameters is found to be moderately good.View full abstractDownload PDF (975K)
Products Spotlight
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Takao Sasaki, Masahiro Henmi2011 Volume 36 Issue 2 Pages 79-81
Published: 2011
Released on J-STAGE: July 14, 2012
JOURNAL OPEN ACCESSIn seawater RO desalination field, innovative membranes are demanded to achieve lower cost, lower energy consumption and lower impact to the global environment such as brine discharge, disposal of chemicals using in pretreatment processes. High performance RO membranes for seawater desalination has been produced with has high solute removal and high water permeability, based on the ultimate level of investigation for RO membranes on focusing physical and chemical properties through PALS (Positron annihilation lifetime spectroscopy) study, TEM (Transmission electron microscopy) analysis, etc.View full abstractDownload PDF (809K)
Editor’s note
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