巻号一覧
35 巻 (2010)
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- 3 号 p. 100-
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35 巻, 3 号
選択された号の論文の8件中1～8を表示しています
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巻頭言
特集：ナノファイバー膜
総説
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谷岡 明彦2010 年 35 巻 3 号 p. 100-104
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスElectrospray method (in some case called as electrospray deposition: ESD) is a versatile method for forming thin films and non-woven fabrics. This method has the following advantages: (i) applicable for various solute and molten molecules, which have a wide range of molecular weights (e.g., inorganic molecules, synthetic polymers, proteins, and DNA), (ii) polymer thin films with nano/micro–scaled structures, which range from spheres to fibers, are deposited. Electrospray-deposited thin films have recently attracted much attention for applications such as antifouling or biocompatible coatings for medical devices, high–performance filter media, drug delivery systems, biomaterial scaffolds for tissue engineering, addition of high functionality on membrane surface for water purification and biosensors and biochips (e.g., protein/DNA–microarrays and microfluidic devices).抄録全体を表示PDF形式でダウンロード (757K) -
能美 隆, 前川 麻弥, John B Fenn2010 年 35 巻 3 号 p. 105-112
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスCurrently electrospray and electrospinning techniques have been developed using electrostatic repulsion forces on droplet surface to obtain nanofiber. Ions are the important key factor on both applications. Scientist observed natural phenomena and found the existence of ions more than 100 years ago. When the historical background of electrospray was surveyed from the viewpoint of the ionization technique, the origin started by the awareness of the charged drops in nature. Iribarne noticed that ions were produced by bubbles at the surface of the sea water forming the electric double layer and utilized these fact to create ions. Dole ionized polymers by the hydrostatic electrification of droplets from the hypodermic needle with the Faraday cage as a function of the repeller voltage and originated the electrospray ionization. Cluster ions were separated by the skimmer technique and the positive and negative ion peaks were obtained. The multiply charged macro ion from electrospray ionization was determined. Now electrospray ionization of liquids with quadropole mass analysis to analyze proteins and nucleotides is one of the main streams of the structural characterization. The use of AC in electrospraying method and electrospinning process was demonstrated to obtain PEO fiber mats in a significant reduction of whipping.抄録全体を表示PDF形式でダウンロード (1194K) -
松本 英俊2010 年 35 巻 3 号 p. 113-118
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスElectrospinning is a straightforward and versatile method for forming continuous thin fibers based on an electrohydrodynamic process. This method has the following advantages: (i) applicability for a broad spectrum of molecules, such as inorganic molecules, synthetic polymers, proteins, and DNA; and (ii) ability to produce thin fibers with diameters in the micrometer and nanometer ranges. Electrospun nanofibers or nanofibrous membranes with high surface areas have recently attracted much attention for applications, such as high–performance filter media, protective clothes, composites, drug delivery systems, biomaterial scaffolds for tissue engineering, sensors, and electronic devices. The properties of nanofibers and performances of nanofibrous membranes can be improved by controlling the fiber diameter, surface morphology, and internal structure of nanofibers. For example, by reducing fiber diameter down to nanometer–scale, we can produce the high–performance membranes for air filtration (i.e., high filtration efficiency and low pressure drop) because of aerodynamic slip at the fiber surface. This report describes fundamental aspects of preparation of nanofibrous membranes by electrospinning and their applications such as ion-exchange nanofiber membranes for water treatment and carbon nanofiber membranes for electrodes.抄録全体を表示PDF形式でダウンロード (842K) -
Matsuura T, Feng C, Khulbe KC, Rana D, Singｈ G, Gopal R, Kaur S, Barha ...2010 年 35 巻 3 号 p. 119-127
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスElectro–spinning is known as a simple and versatile method to produce nonwoven membranes made out of nanofibers. A wide range of polymers and blends can be used to yield nanofibers. Commonly used membrane polymers such as cellulose acetate (CA), polysulfone (PSU) and polyvinylidene fluoride (PVDF) have been successfully electro–spun to form nonwoven nanofiber membranes for water filtration. Investigations have revealed that electro-spun nanofibrous membranes (ENMs) possess high–flux rates and low transmembrane pressure. These characteristics are due to its 1) high porosity, 2) interconnected open pore structure and 3) tailorable membrane thickness. Although electro–spun membranes have been extensively studied for decades and successfully commercialized as air filtration membrane, they have not been applied for water treatment. This article is a summary of the collaborative work conducted recently at the Industrial Membrane Research Laboratory of the University of Ottawa and at the Nanoscience & Nanotechnology Initiative of the National University of Singapore for the following investigations. a. Removal of latex particles from water by PVDF nanofiber membranes b. Development of nanofiber based thin film composite (TFC) membranes for nanofiltration c. Seawater desalination by membrane distillation using PVDF nanofiber membranes d. Trihalomethanes (THMs) and haloacetic acids (HAAs) removal by carbonized polyacrylnitrile (PAN) nanofiber membranes抄録全体を表示PDF形式でダウンロード (674K) -
山岡 哲二2010 年 35 巻 3 号 p. 128-133
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスTissue regeneration using biodegradable scaffolds such as poly(L–lactic acid) (PLLA) has been attracting great attention as a new alternating strategy to the artificial organs and organ transplantation. However, PLA is not necessarily an ideal substance for the scaffold from the viewpoint of the cell–compatibility and selectivity. Moreover, it is quite difficult to modify the PLA surfaces because of the lack of side functional groups. In the present study, we developed a novel immobilization method of bioactive molecules onto PLLA nanofiber membrane. Amphiphilic block oligomers probes composed of oligo(lactic acid) (OLA) and bioactive peptides were newly synthesized (OLA–peptide), and a small amount of the synthesized OLA–peptides was added to PLA solution before fabricating the PLA nanofiber membrane in order to impart the specific cell adhesion property. The amphiphilic peptides were proved to distribute evenly and stably in the nanofibers due to the hydrophobic interaction with PLA and to improve the cell adhesion property. In addition, nanofiber membrane conduits for nerve tissue regeneration was developed and evaluated in vitro and in vivo.抄録全体を表示PDF形式でダウンロード (816K) -
宇山 浩2010 年 35 巻 3 号 p. 134-140
発行日: 2010年
公開日: 2013/02/16
ジャーナル オープンアクセスRecent progress on nanofiber membranes for contribution to sustainable society was demonstrated in the present review. An all bio-based polymer composite consisting of electrospun poly(L-lactic acid) (PLLA) ultrafine fibers and network polymers of epoxidized soybean oil was fabricated. The PLLA ultrafine fiber non-woven mat was enzymatically degraded significantly faster than the PLLA film, which suggests the new evaluation method of biodegradability of polymers to shorten the test period by using electrospun ultrafine fibers. By immobilization of enzymatically synthesized phenolic polymers on electrospun ultrafine fibers, an anti-allergen sheet was developed. Unusual shape change of electrospun fiber mats of acrylic resin was observed by immersion in an aqueous ethanol, which was applied for fabrication of a porous material of acrylic resin by phase separation. Three-dimensional fibrous matrix was fabricated by dry spinning using a coaxial nozzle and ethanol bath collector.抄録全体を表示PDF形式でダウンロード (836K)
原著
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水野 耕治, 田口 佳成, 田中 眞人2010 年 35 巻 3 号 p. 146-152
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスWe have tried to prepare microcapsules containing water phase as a core material by using UV–curable resin and by utilizing the (W/O)/W dispersion. A merit of microencapsulation using UV curable resin is to shorten the time required to prepare microcapsules. In this preparation method, stability of the (W/O) dispersion in the (W/O)/W dispersion is very important, because inner water droplets coalesce and are removed from the microcapsules. In the experiment, water vapor permeability of model film made of UV–curable resin was estimated and the effect of oil soluble surfactant species on stability of the (W/O) dispersion was investigated. It was found out that model film made of monomer C (DCP–A) resulted in the lowest permeability for water vapor and the surfactant with HLB of 0.3 made the (W/O) dispersion more stable. As a result, we were able to prepare microcapsules containing water phase by using UV curable resin.抄録全体を表示PDF形式でダウンロード (889K)
製品&技術
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新田 和也2010 年 35 巻 3 号 p. 153-156
発行日: 2010年
公開日: 2015/06/19
ジャーナル オープンアクセスNanofiber filters were prepared by electrospray deposition (ESD) method. Applying high voltage between fine capillary and substrate, sample liquid is sprayed by electrostatic force and split into nano–size fibers and particles by coulomb explosion. These filters have high performance such as low pressure loss and high filtration efficiency. The nanofiber coated non–woven fabric was arranged in downstream side of the filter element. The turbulent flow of the air was decreased by nanofiber and filtration efficiency increased considerably.抄録全体を表示PDF形式でダウンロード (722K)
編集後記
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