Hydrophobic Effect on Alkaline Stability of Graft Chains in Ammonium‐type Anion Exchange Membranes Prepared by Radiation‐Induced Graft Polymerization

2021 ◽  
Vol 6 (33) ◽  
pp. 8879-8888
Author(s):  
Takashi Hamada ◽  
Yue Zhao ◽  
Kimio Yoshimura ◽  
Aurel Radulescu ◽  
Kenji Ohwada ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Graft Polymerization ◽  
Hydrophobic Effect ◽  
Anion Exchange Membranes ◽  
Alkaline Stability ◽  
Radiation Induced

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 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.

scholarly journals Anion-exchange membranes with polycationic alkyl side chains attached via spacer units

2016 ◽  
Vol 4 (43) ◽  
pp. 17138-17153 ◽  
Author(s):  
Hai-Son Dang ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Ion Conductivity ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Alkaline Stability ◽  
Phenylene Oxide ◽  
Alkyl Side Chains

Poly(phenylene oxide)s carrying pendant polycationic alkyl side chains with a suitable configuration show high hydroxide ion conductivity and excellent alkaline stability.

scholarly journals A theoretical study of how C2-substitution affects alkaline stability in imidazolium-based anion exchange membranes

2015 ◽  
Vol 278 ◽  
pp. 5-10 ◽  
Author(s):  
Ryo Tsuchitani ◽  
Hiroshi Nakanishi ◽  
Hideyuki Shishitani ◽  
Susumu Yamaguchi ◽  
Hirohisa Tanaka ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Theoretical Study ◽  
Anion Exchange Membranes ◽  
Alkaline Stability

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 Radiation-induced grafting of a butyl-spacer styrenic monomer onto ETFE: the synthesis of the most alkali stable radiation-grafted anion-exchange membrane to date

2018 ◽  
Vol 6 (3) ◽  
pp. 823-827 ◽  
Author(s):  
Julia Ponce-González ◽  
Imad Ouachan ◽  
John R. Varcoe ◽  
Daniel K. Whelligan
Keyword(s):  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Ex Situ ◽  
Alkaline Stability ◽  
Radiation Induced ◽  
Exchange Membrane ◽  
Radiation Induced Grafting

Adding a butyl spacer between the benzene and N-methylpyrrolidinium group led to double the ex situ alkaline stability compared to use of a methylene spacer.

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