巻号一覧
20 巻 (1995)
- 6 号 p. 372-
- 5 号 p. 302-
- 4 号 p. 246-
- 3 号 p. 156-
- 2 号 p. 92-
- 1 号 p. 2-
20 巻, 3 号
選択された号の論文の9件中1～9を表示しています
- |<
- <
- 1
- >
- >|
-
仲川 勤1995 年 20 巻 3 号 p. 156-168
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーStudies on the gas permeability of poly [1- (trimethylsilyl) -1-propyne], PMSP, membrane which has the highest gas permeability of all polymeric membranes are reviewed. First of all, permeability, solubility and diffusion coefficients of gases of PMSP membranes were shown. However, the permeability coefficient of gases, for example, oxygen permeability reported in references differs remarkably like 2.6-10×10-7 [cm3 (STP) ·cm/cm2·sec·cmHg] at 25°C. This suggests that the condition of the PMSP membrane before gas permeability measurement influences the results. In the second part, phenomena of the decrease of the gas permeability is introduced in detail. The PMSP membrane has extraordinary large unrelaxed free volume and the property of sorption of non-volatile organic vapor even at the lowest vapor pressure such as 10-6 torr. These are the main factor for the decrease of the gas permeability. The degree of the decrease reported also differs. In the third part, the modification of the PM-SP and/or PMSP membranes by physical and chemical methods are reviewed ; laminate with other gas permeable thin membranes, filling with polyorganosiloxane or oligomers, and irradiation of ultraviolet light, low-temperature plasma treatment, graft polymerization on C-CH3, copolymerization with phenyl propyne. Especially, the filling of polydimethylsiloxane into the PMSP membrane is effective for the stabilization of the gas permeability against the physical aging, even in the filling of low concentration of less than 1 wt%.抄録全体を表示PDF形式でダウンロード (1523K) -
喜多 英敏1995 年 20 巻 3 号 p. 169-182
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーZeolite membranes are drawing attention in membrane science because of the unique characteristics of zeolite in areas such as ion exchange, catalysis, adsorption and molecular sieving. The synthesis of zeolite membrane and their applications to pervaporation are reviewed. Emphasis is placed upon the relation between the conditions of hydrothermal synthesis and membrane performances of pervaporation of water/organic liquid mixtures. Possible transport mechanisms through the membranes for separation are outlined and their potential applications in membrane reactors are also discussed.抄録全体を表示PDF形式でダウンロード (1992K) -
矢澤 哲夫1995 年 20 巻 3 号 p. 183-193
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーRecently, active researches on inorganic membrane have been carried out. Among inorganic membranes, glass membrane shows good shaping ability and it is quite easy to mass-produce. In addition, glass hollow fiber and glass capillary membrane show elasticity.
From recent researches, it is clear that glass membrane indicates high selectivity and high permeability for gas separation. Here, I describe the ability of gas separation of glass membrane including sol-gel coat membrane prepared from silicon alkoxides.抄録全体を表示PDF形式でダウンロード (1136K) -
近藤 正和1995 年 20 巻 3 号 p. 194-203
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーWaste water from phenolic resin process contains 50, 000-100, 000 mg/l phenol and little amount of several substances. Pervaporation offers good possibility to compete against conventional technologies, like biological water treatment and solvent extraction, for the removal of phenol from the waste water.
It has clear advantage as phenol is continuously and selectively removed from the feed solution, in contrast to competing technologies where huge amount of water and energy are consumed.
From the tests for removal of phenol from waste water in phenolic resin process using PEBA membrane, it was observed that phenol concentration was reduced from 50, 000 mg/l to 300mg/l, after which the retentate can be treated directly with biological water treatment plant.抄録全体を表示PDF形式でダウンロード (1347K) -
Takashi Suzuki, Hitoshi Imaizumi, Ryotaro Kiyono, Masayasu Tasaka1995 年 20 巻 3 号 p. 204-212
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーSolvent transport across a hydrophobic PTFE membrane and the modified PTFE membranes was measured in water under a temperature difference. Moreover, thermoosmosis across the anion-exchange membrane, Neosepta AM-1, was measured for poly (acrylamide) and urea solutions. The direction of thermoosmosis across the PTFE and the modified PTFE membranes was from the hot side to the cold side, whereas that across anion-exchange membrane was from the cold side to the hot side. Thermoosmosis across the modified PTFE membranes decreased with increasing the hydrophilic groups in the membrane. For poly (acrylamide) and urea solutions the absolute values of volume fluxes decreased with increasing the concentration of the external solution, because of the decrease of the entropy difference of water between the membrane and the external solution.抄録全体を表示PDF形式でダウンロード (932K) -
Takao Kokugan, Kaseno, Shiro Fujiwara, Masaru Shimizu1995 年 20 巻 3 号 p. 213-223
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーTo investigate the effect of ultrasonic irradiation on ultrafiltration (UF) properties, three kinds of solutions : in which a gel layer was easy to form, difficult to form and whose properties were in between, were examined. Ultrasound was irradiated on about 1/8 of the permeation surface of a ceramic membrane. Ultrasonic irradiation affected a gel and a boundary layers. The mass transfer coefficient for UF of ceramic membrane can be correlated to the Sherwood number. The Sherwood number were correlated nearly by Leveque equation without ultrasonic irradiation. But when ultrasound was irradiated, the Sherwood number was larger about by 1.4 times than the one without ultrasonic irradiation. An ultrasonic irradiation had a tendency to decrease the observed rejection slightly by increasing permeation flux whether a gel layer forms on the surface or not.抄録全体を表示PDF形式でダウンロード (1027K) -
李 国慶, 小西 聡史, 斎藤 恭一, 古崎 新太郎, 須郷 高信, 幕内 恵三1995 年 20 巻 3 号 p. 224-228
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーA chelating microporous membrane was prepared by grafting of an epoxy-group-containing vinyl monomer onto a microfiltration membrane by applying radiation-induced graft polymerization and subsequent modification with ethylenediamine (EDA). The resultant membrane had an immobilized EDA density of 0.67 mol/kg while maintaining the permeability of the starting membrane. Permeation of palladium solution (20 g-Pd/m3, pH=0.5-4) through the chelating microporous membrane minimized the diffusional path of the palladium ion to the immobilized EDA. Molar ratio of the Pd sorbed to the immobilized EDA was 0.36 at pH=1.抄録全体を表示PDF形式でダウンロード (486K) -
Qunhui Guo, Haruhiko Ohya, Youichi Negishi, Jicai Huang1995 年 20 巻 3 号 p. 229-238
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーThe chitosan composite membranes supported by the unhydrolyzed highly cyanoethylation cellulose (HCEC), hydrolyzed cellulose triacetate (CTA), unhydrolyzed and hydrolyzed CTA-HCEC blend layers respectively were prepared for pervaporation (PV) separation of alcohol. The effects of feed concentration, operation temperature, and the molecular size and shape of alcohol on the permselectivity of the composite membranes used were investigated. The measurement of molecular weight cut-off, the infrared (IR) spectroscopic analysis and the scanning electronic microscopy (SEM) observation were used to investigate the effects of the support membrane properties on the permselectivity of chitosan composite membrane.抄録全体を表示PDF形式でダウンロード (1114K) -
佐々木 正富1995 年 20 巻 3 号 p. 239-241
発行日: 1995/05/01
公開日: 2011/03/04
ジャーナル フリーThere has been a demand for such hemodialysis membranes of better biocompatibility the use of which would reduce the incidence of complications in patients who have been under long hemodialysis treatment.
We have developed a surface modification technique, consisting of forming efficiently a synthetic polymer layer on the inside of the regenerated cellulose hollow fiber without impairing fiber performance. Our newlydeveloped membrane has an excellent biocompatibility by modifying the inner surface and by immobilizing Vitamin E (α-tocopherol), which serves as an antioxidant, to the modified surface.抄録全体を表示PDF形式でダウンロード (320K)
- |<
- <
- 1
- >
- >|