Permeation of oxygen/nitrogen in cobalt-chelated copoly(EDTA-MMA-BA) membranes

Wang, Cheng Chien; Chen, Chuh-Yean; Huang, Chao; Chen, Chuh‐Yung; Kuo, Jimmy

doi:10.1016/s0376-7388(00)00475-0

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…These crown ether methacrylic polymers have the added interest of being able to coordinate metal ions in hydrophobic solvents, originating the separation from their associated anions and making their salts soluble in these solvents. The use of such compounds for species separation has been investigated recently. − Particularly important is the possibility to develop membranes in which facilitated transport of oxygen takes place. − As we have seen, the mechanical properties of these crown ether methacrylates are reasonable; they are not fragile, and easy to handle in the solid state, and therefore interesting in different transport fields.…”

Section: Introductionmentioning

confidence: 99%

Gas Transport Properties of Poly(2-ethoxyethyl methacrylate-co-2-hydroxyethyl methacrylamide)

et al. 2004

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A series of methacrylic copolymers was prepared by radical polymerization of the monomers 2-ethoxyethyl methacrylate and 2-hydroxyethyl methacrylamide and a small quantity of a cross-linking agent ethylene glycol dimethacrylate. Water swelling of the membranes, mechanodynamical analysis, density measurements, and ATR-FTIR studies were performed on the copolymers. High vacuum pressure techniques were used to evaluate the flow of He, O2, N2, CO2, CH4, CH3CH3, and CH2CH2 through these membranes, and solubility, diffusivity, and permeability coefficients were determined. The effect of the increase of the amount of methacrylamide in the copolymer on transport properties, glass transition, fractional free volume, cohesive energy density, and specific interactions has been studied and is reported in this work.

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Section: Introductionmentioning

confidence: 99%

Gas Transport Properties of Poly(2-ethoxyethyl methacrylate-co-2-hydroxyethyl methacrylamide)

et al. 2004

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“…Fortunately, a chelating polymer, which has chelating groups, is suited to performing this function owing to its high metal stability constant. Ethylenediaminetetraacetic acid (EDTA) is well-known due to its strong chelating ability with metal ions and has been widely used in gas-membrane separation as well as detection of metal ions. , In fact, EDTA has been successfully introduced into the end of polymer chains and applied in the metal-chelated catalyst, as found in our previous study …”

Section: Introductionmentioning

confidence: 91%

Polypropylene Fibers Modified by Plasma Treatment for Preparation of Ag Nanoparticles

2006

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A novel method for preparing poly(propylene-graft-2-methacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester)-silver fibers (PPG-IAg fibers) by plasma-induced grafting polymerization is presented in this study. The chelating groups, -N(CH2COO-)2 (GMA-IDA), on the surface of the PPG-I fibers are the coordination sites for chelating silver ions. At these sites, Ag nanoparticles were grown first by reduction with UV light with a wavelength of 366 nm, and second, through immersion in a 24% formaldehyde solution with pH values set variously at 2, 5, 8, and 11. The characteristics of the PPG-I fibers with differing durations of plasma treatment were monitored by using a Fourier transform infrared (FT-IR) spectroscope. Scanning electronic microscopy (SEM) and elemental analysis show that the percentage of GMA-IDA grafted onto PP fiber reaches a maximum when the plasma treatment time is 3 min. Plasma treatment time beyond a certain length of time results in an abundance of free radicals and causes considerable cross-linking on the fiber surface which thus decreases the extent of grafting. Moreover, the crystalline phase of Ag nanoparticles is identified by using X-ray diffraction (XRD). When the PPG-I fibers are reduced by the UV light method, SEM and TEM microscopes reveal that the size of the Ag nanoparticles on the fiber surface decreases significantly with the increase of pH values in aqueous solutions. Notably, in the reduction of formaldehyde solution, the particle size of Ag nanoparticles reaches a minimum at the lowest pH value. The TEM observations show that Ag nanoparticles are distributed both in the exterior and interior of the grafting layer. In addition, under high pH values the distribution of the Ag nanoparticles permeate more deeply in the GMA-IDA grafting layer due to the swelling effect of the GMA-IDA polymer.

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Polymeric Membranes for Gas Separation

Favre¹

2010

Comprehensive Membrane Science and Engineering

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Permeation of oxygen/nitrogen in cobalt-chelated copoly(EDTA-MMA-BA) membranes

Cited by 7 publications

References 20 publications

Gas Transport Properties of Poly(2-ethoxyethyl methacrylate-co-2-hydroxyethyl methacrylamide)

Gas Transport Properties of Poly(2-ethoxyethyl methacrylate-co-2-hydroxyethyl methacrylamide)

Polypropylene Fibers Modified by Plasma Treatment for Preparation of Ag Nanoparticles

Polymeric Membranes for Gas Separation

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