scholarly journals Radiation-Induced Asymmetric Grafting of Different Monomers into Base Films to Prepare Novel Bipolar Membranes

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2028
Author(s):  
Shin-ichi Sawada ◽  
Yasunari Maekawa
Keyword(s):  
Acrylic Acid ◽  
Anion Exchange ◽  
Graft Polymerization ◽  
The Other ◽  
Practical Applications ◽  
Bipolar Membranes ◽  
Graft Polymers ◽  
Grafting Reactions ◽  
Radiation Induced

We prepared novel bipolar membranes (BPMs) consisting of cation and anion exchange layers (CEL and AEL) using radiation-induced asymmetric graft polymerization (RIAGP). In this technique, graft polymers containing cation and anion exchange groups were introduced into a base film from each side. To create a clear CEL/AEL boundary, grafting reactions were performed from each surface side using two graft monomer solutions, which are immiscible in each other. Sodium p-styrenesulfonate (SSS) and acrylic acid (AA) in water were co-grafted from one side of the base ethylene-co-tetrafluoroethylene film, and chloromethyl styrene (CMS) in xylene was simultaneously grafted from the other side, and then the CMS units were quaternized to afford a BPM. The distinct SSS + AA- and CMS-grafted layers were formed owing to the immiscibility of hydrophilic SSS + AA and hydrophobic CMS monomer solutions. This is the first BPM with a clear CEL/AEL boundary prepared by RIAGP. However, in this BPM, the CEL was considerably thinner than the AEL, which may be a problem in practical applications. Then, by using different starting times of the first SSS+AA and second CMS grafting reactions, the CEL and AEL thicknesses was found to be controlled in RIAGP.

Design of urea-permeable anion-exchange membrane by radiation-induced graft polymerization

1993 ◽  
Vol 81 (3) ◽  
pp. 295-305 ◽  
Author(s):  
William Lee ◽  
Kyoichi Saito ◽  
Shintaro Furusaki ◽  
Takanobu Sugo ◽  
Keizo Makuuchi
Keyword(s):  
Anion Exchange ◽  
Graft Polymerization ◽  
Anion Exchange Membrane ◽  
Radiation Induced ◽  
Exchange Membrane

scholarly journals Development of Hydrogen-Permselective Porous Membranes Using Radiation-Induced Graft Polymerization

2020 ◽  
Vol 4 (2) ◽  
pp. 23 ◽  
Author(s):  
Shin Hasegawa ◽  
Shinichi Sawada ◽  
Shinya Azami ◽  
Tokio Hagiwara ◽  
Akihiro Hiroki ◽  
...  
Keyword(s):  
Water Vapor ◽  
Acrylic Acid ◽  
Polyvinylidene Fluoride ◽  
Graft Polymerization ◽  
Hydrogen Permeability ◽  
Porous Membranes ◽  
Hot Press ◽  
Radiation Induced ◽  
Permeability For Water ◽  
Radiation Induced Grafting

Hydrogen-permselective membranes were developed using a radiation-induced grafting method. Styrene (St) and acrylic acid (AAc) monomers were introduced into porous polyvinylidene fluoride (PVDF) membranes to obtain St- and AAc-grafted PVDF membranes with grafting degrees of 82% and 92%, respectively. The porosities of the grafted membranes were controlled in the range 30–40% by hot-press compression at 159 °C and 4 MPa. The hydrogen permeability was found to be of the order of 10−7 mol/m2∙s∙Pa, which was higher than the permeability for water vapor and nitrogen (oxygen model). The St- and AAc-grafted membranes exhibited 9.0 and 34 times higher permeability for H2 than for H2O and N2, respectively.

Cation and Anion Exchange Membranes Prepared by Radiation-Induced Graft Polymerization for Application in Electrodialysis

2014 ◽  
Vol 881-883 ◽  
pp. 1157-1160 ◽  
Author(s):  
Jin Hua Chen ◽  
Asano Masaharu ◽  
Yasunari Maekawa
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Graft Polymerization ◽  
Exchange Capacity ◽  
Anion Exchange Membranes ◽  
Ion Exchange Capacity ◽  
Electrodialysis Cell ◽  
Radiation Induced ◽  
Poly Ethylene ◽  
Percent Removal

Cation and anion exchange membranes were prepared by radiation-induced graft polymerization of ethyl styrenesulfonate and chloromethyl styrene, respectively, onto poly (ethylene-alt-tetrafluoroethylene) (ETFE) films, followed by hydrolysis in the former case and quaternization in the latter case. The degree of grafting as well as the ion exchange capacity (IEC) and the conductivity of the prepared membranes were investigated. Furthermore, the cation and anion exchange membranes were tested in an electrodialysis cell using CsNO3 aqueous solution in the dilute compartment. It was found that the high-IEC membranes enhanced the electrodialysis speed, while the low-IEC membranes showed the high percent removal.

scholarly journals Radiation-Induced Graft Polymerization of Acrylic Acid onto Poly(3-hydroxybutyrate) and Its Copolymer.

1996 ◽  
Vol 52 (11) ◽  
pp. 623-626 ◽  
Author(s):  
Hiroshi Mitomo ◽  
Tetsuya Sasaoka ◽  
Fumio Yoshii ◽  
Keizo Makuuchi ◽  
Terumi Saito
Keyword(s):  
Acrylic Acid ◽  
Graft Polymerization ◽  
Radiation Induced

scholarly journals Development of a Simplified Radiation-Induced Emulsion Graft Polymerization Method and Its Application to the Fabrication of a Heavy Metal Adsorbent

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1373 ◽  
Author(s):  
Masaaki Omichi ◽  
Yuji Ueki ◽  
Noriaki Seko ◽  
Yasunari Maekawa
Keyword(s):  
Heavy Metal ◽  
Graft Polymerization ◽  
Gamma Ray ◽  
High Dose Rate ◽  
High Dose ◽  
Grafting Reaction ◽  
Monomer Solution ◽  
Graft Polymers ◽  
Radiation Induced ◽  
Heavy Metal Adsorbent

A simplified radiation-induced emulsion graft polymerization (SREG) method is proposed. This method involves a convenient and easy degassing process of a monomer solution using a commercially available sealed glass jar. A loaded weight on the lid of the jar was used to control the jar’s internal pressure as the degassing of the monomer solution took place using a vacuum pump. The degassing method was highly reproducible, resulting from no bumping of the monomer solution. The initial grafting velocity was proportional to the absorbed doses of pre-irradiation between 5 and 20 kGy. This result indicates that dissolved oxygen was sufficiently eliminated from the monomer solution at such a level where the remaining oxygen had little effect on the grafting reaction at a dose of 5 kGy. The method was then applied to the fabrication of a heavy metal adsorbent that possessed a sufficient adsorption capacity of Co(II) ions. The SREG method is applicable to the fabrication of a wide variety of functional graft polymers because high-dose-rate gamma-ray radiation and expensive experimental equipment are not necessary.

A Stydy on the Immobilization of Biomolecules on Poly(acrylic acid)-grafted MWCNTs Prepared by Radiation-Induced Graft Polymerization

Polymer Korea ◽  
2010 ◽  
Vol 34 (2) ◽  
pp. 150-153
Author(s):  
Chan Hee Jung ◽  
Byoung Min Lee ◽  
In Tae Hwang ◽  
Jae Hak Choi ◽  
Young Chang Nho ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Graft Polymerization ◽  
Radiation Induced ◽  
Poly Acrylic Acid

scholarly journals Preparation of Anion-exchange Fibers with Radiation-induced Emulsion Graft Polymerization for Rapid Protein Purification

RADIOISOTOPES ◽  
2017 ◽  
Vol 66 (7) ◽  
pp. 243-249 ◽  
Author(s):  
Daiki Kudo ◽  
Yuka Matuzaki ◽  
Shigeko Kawai-Noma ◽  
Daisuke Umeno ◽  
Kyoichi Saito
Keyword(s):  
Protein Purification ◽  
Anion Exchange ◽  
Graft Polymerization ◽  
Radiation Induced
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