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Journal Articles

Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties under various humidified conditions

Hamada, Takashi; Hasegawa, Shin; Fukasawa, Hideyuki*; Sawada, Shinichi; Koshikawa, Hiroshi; Miyashita, Atsumi; Maekawa, Yasunari

Journal of Materials Chemistry A, 3(42), p.20983 - 20991, 2015/11

 Times Cited Count:28 Percentile:70.43(Chemistry, Physical)

no abstracts in English

Oral presentation

Graft-type polymer electrolyte membranes consisting of aromatic hydrocarbon polymers / inorganic-nanoparticle composites

Fukasawa, Hideyuki*; Hasegawa, Shin; Maekawa, Yasunari

no journal, , 

The development of polymer electrolyte membranes (PEMs) with both high proton conductivity at low relative humidity (RH) and excellent mechanical properties at high RH were required for commercialization of fuel cells. We have reported the successful preparation of highly conducting and mechanically stable grafted-type (PEMs) based on an aromatic hydrocarbon polymer, poly(ether ether ketone) (PEEK). Since polymer membranes are reinforced mechanically by the hybridization with inorganic nano-particles, we investigated the radiation induced grafting speed of ethyl p-styrenesulfonate (ETSS) onto hybrid films consisting of PEEK and inorganic nanoparticles such as silica, magnesium oxide, and aluminum oxide and the effects of inorganic nano-particles on proton conductivity and mechanical properties of the synthesized hybrid PEEK films.

Oral presentation

Graft-type polymer electrolyte membranes consisting of poly(ether ether ketone) (PEEK) and inorganic nanoparticles

Hasegawa, Shin; Fukasawa, Hideyuki*; Koshikawa, Hiroshi; Chen, J.; Maekawa, Yasunari

no journal, , 

Polymer electrolyte membranes (PEMs) with high proton conductivity at low relative humidity (RH) and superior mechanical properties at high RH were required for commercialization of fuel cells. Herein, we investigated highly conducting and mechanically stable graft-type PEMs (PEEK-PEM) based on an aromatic hydrocarbon polymers, poly (ether ether ketone) (PEEK). According to the high mechanical strength, the thin PEEK-PEM (10 $$mu$$m) could be prepared and showed higher power generation density than that of Nafion. In addition, Hybrid PEEK-PEMs with inorganic nano-particles such as silica and almina were prepared for further mechanical reinforcement of PEEK-PEMs.

Oral presentation

Preparation of graft-type polymer electrolyte membranes consisting of aromatic hydrocarbon polymer/inorganic nanoparticle composites and their properties

Fukasawa, Hideyuki*; Hasegawa, Shin; Maekawa, Yasunari

no journal, , 

The development of polymer electrolyte membranes (PEMs) with high proton conductivity at low relative humidity (RH) and excellent mechanical properties at high RH were required for commercialization of fuel cells. We previously reported the successful preparation of highly conducting and mechanically stable graft-type PEMs based on an aromatic hydrocarbon polymer, poly(ether ether ketone) (PEEK). On the other hand, polymer membranes are reinforced mechanically by the hybridization with inorganic nanoparticles. Therefore we investigated the radiation-induced graft polymerization of ethyl p-styrenesulfonate onto hybrid films consisting of PEEK and inorganic nanoparticles such as silica, magnesium oxide and aluminum oxide, and the effects of inorganic nanoparticles on the proton conductivity and durability of the obtained graft-type hybrid-PEEK PEMs.

Oral presentation

Synthesis of graft-type polymer electrolyte membranes consisting of aromatic hydrocarbon polymer/inorganic nanoparticle composites and their properties

Fukasawa, Hideyuki*; Hasegawa, Shin; Maekawa, Yasunari

no journal, , 

Polymer membranes are reinforced mechanically by the hybridization with inorganic nano-particles. We previously reported the successful preparation of highly conducting and mechanically stable graft-type PEMs based on an aromatic hydrocarbon polymer, poly(ether ether ketone) (PEEK). Therefore we synthesized graft-type hybrid-PEEK PEMs by the radiation-induced graft polymerization of divinylbenzene and ethyl p-styrenesulfonate onto the hybrid films consisting of PEEK and inorganic nanoparticles such as silica. The hybrid PEEK PEMs with 3% silica nano-particles showed higher proton conductivity than the original PEEK PEMs at high temperature and low relative humidity (80$$^{circ}$$C, 30%RH). This is because the silica nano-particles enhance water retention ability in the PEEK-PEMs to increase the proton conductivity at dry conditions.

Oral presentation

Synthesis and evaluation of graft-type polymer electrolyte membranes consisting of aromatic hydrocarbon polymer/inorganic nanoparticle composites

Fukasawa, Hideyuki*; Hasegawa, Shin; Maekawa, Yasunari

no journal, , 

We previously reported the successful preparation of highly conducting and mechanically stable graft-type PEMs based on an aromatic hydrocarbon polymer, poly(ether ether ketone) (PEEK). Since polymer membranes are mechanically reinforced by the hybridization with inorganic particles, we synthesized graft-type hybrid-PEEK PEMs by the radiation-induced graft polymerization of ethyl p-styrenesulfonate onto the hybrid films consisting of PEEK and inorganic nanoparticles such as silica. The hybrid PEEK PEMs with 3% silica nano-particles showed higher tensile strength than the original PEEK PEMs at high temperature and high relative humidity (80$$^{circ}$$C, 100%RH). This is because the filler effect of silica nano-particles and high crystallinity in the PEEK-PEMs are the origin of high tensile strength at humidified conditions.

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