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《Journal of Zhejiang University(Engineering Science)》 1993-03
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A study on the structure and oxygen-enriching properies of SA/FA blending LB composite membranes

Xu Youyi Yu Bohong Wang Hongjun Xu Hong(Dept. of Polymer Sci. and Eng. )  
An oxygen-enriching composite membrane is prepared by depositiong stearic acid (SA) and H-(CF2)10-COOH (FA)blend monolayers on the surface of porous polypropylene membrane, using LB (Langmuir-Blodgett) technique. The structure of composite mem- branes is characterized by IR,UV,SAXD,EXCA and so on. From the good linear relationship of IR absorbances with the number of deposited monolayers of SA/FA blend films, it is known that the typical and excellent Y-type LB film can be prepared.Since there is no carbonyl peak in the IR and NV spectra of SA/FA blend LB films, it is suggested that each Cd2+ in the LB film may be coordinated with two carbonyl groups, as shown below:where R and R' stand for main chains of SA of FA respectively. The quantitative analysis of ESCA results has also supported above coordinated model. From the measurement of long space by the small angle x-ray diffraction (SADX), we can calculate the thickness of SA (or SA/FA blend) LB monolayer which is about 25. 4 A. this result is consistent with the theoretical length of SA molecules and also proves that the monolayers are typical Y-type LB films.It is shown that the separation factor (αo/n)increased rapidly while the permeability (J) decreased a little with increasing number of deposited monolayers. When the thickness of composite membrane is only about 304 A (12 monolayers), the good oxygen enrichment performance has already been gotten, e.g. αo/n-2. 6, Jo2 = 1. 01×10-2 cm3 (STP)/cm2. sec. cmHg.
【Fund】: 国家自然科学基金
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【Citations】
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【Co-citations】
Chinese Journal Full-text Database 7 Hits
1 SUN Qunhui(Department of Polymer Materials Science & Engineering,South China University of Technology,Guangzhou 510641)LIN Shangan(Institude of Polymer Science,Zhongshan University,Guangzhou 510275);STUDIES ON OXYGEN-ENRICHMENT PROPERTIES OF NOVEL LC/POLYMER COMPOSITE MEMBRANES AND STRUCTURAL CHARACTERIZATION Ⅰ.OXYGEN- ENRICHMENT PROPERTIES OF LC/POLYMER COMPOSITE MEMBRANES(PDLCM)[J];ACTA POLYMERICA SINICA;1995-05
2 Hao Jianqiang;Jia Lianda;Xu Jiping Changchun Institute of Applied Chemistry;Bromination of Poly (2,6-Dimethyl-1,4-Phenylene Oxide) and Their Oxygen Enrichment Behavior[J];Journal of Functional Polymers;1989-02
3 PENG Zi long, LI Zuo yi, HU Yu, TAN Li guo, YANG Xiao fei (Dept. of Electrical Sci. & Tech., Huazhong University of Sci. & Tech., Wuhan 430074, China);Application of genetic algorithm in measurement with ellipsometer[J];OPTICAL TECHNOLOGY;2000-03
4 LIU Liying ZHENG Jiabiao WANG Wencheng ZHANG Zhiming (Laboratory of Laser Physics and Optics, Fudan University, Shanghai 200433) FANG Yi TAO Fenggang XU Linxiao (Department of Chemistry, Fudan University, Shanghai 200433) (Received 9 March 1992; revised 30 July 1992);Study on the second-order nonlinear optical property of stilbazium salt polystyrene in Langmuir-Blodgett films[J];Acta Optica Sinica;1993-04
5 Zhou Pengfei Shi Dadao;The Current Situation and prospect of Optical Thin Film Technique in China[J];;1983-01
6 TAO FENG-GANG, XU LIN-XIAO(Department of Chemistry, Fudan University, Shanghai) CHEN GANG YANG XIN-LIANG WANG GONG-MING ZHANG ZHI-MING AND WANG WEN-CHENG(Department of Physics, Fudan University, Shanghai);PREPARATION AND NONLINEAR OPTICAL PROPERTIES OF LB FILM OF POLY-11-METH-ACRYLAMINOUNDECANONIC ACID[J];科学通报(英文版);1989-14
7 Du Jun\ Xu Lijin (Environmental and Chemical Engineering School,Nanchang University,Nanchang 330029,China) Lu Mengwen (Chengzhi Share-holding Co Ltd,Caoshanhu Branch,Nanchang 330002,China);C Program Applied to Ellipsometry[J];JOURNAL OF NANCHANG UNIVERSITY(ENGINEERING & TECHNOLOGY);2000-03
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