Sunshine Factory, Co., Ltd. > Applications > ZrP for PolymerZrP for Polymer
Preparation and Characterization of Sulfonated Polyether Ether Ketone/Zirconium Phosphate Composite Proton Exchange Membranes Obtained by Sol-Gel Process
The sulfonated polyether ether ketone(sPEEK)/zirconium phosphate composite proton exchange membranes were prepared by a sol-gel process, in which zirconium phosphates were formed in-situ in the organic solution. The microstructures of composite membranes were studied by XRD and SEM. The thermal stabilities, methanol permeabilities and proton conductivities were investigated. Water uptakes and dimensional stabilities were also studied.
The results indicate that amorphous zirconium phosphates are formed in the composite membrane, and have a good combination with the organic phase. The thermal stabilities and dimensional stabilities increase, while the water absorptions and methanol permeabilities decrease with the contents of zirconium phosphates increasing. The methanol permeability coefficient of composite membrane is 47.5% lower than that of sPEEK membrane. The temperatures making the composite membranes stable increase as the contents of zirconium phosphates increasing at 100% relative humidity. The temperature reaches 80℃ when the content is 20%. The proton conductivities decrease at low temperatures, and increase with the increase of temperature. The proton conductivities is equivalent to that of Nafion 115 when the temperature is 80℃.
The results indicate that amorphous zirconium phosphates are formed in the composite membrane, and have a good combination with the organic phase. The thermal stabilities and dimensional stabilities increase, while the water absorptions and methanol permeabilities decrease with the contents of zirconium phosphates increasing. The methanol permeability coefficient of composite membrane is 47.5% lower than that of sPEEK membrane. The temperatures making the composite membranes stable increase as the contents of zirconium phosphates increasing at 100% relative humidity. The temperature reaches 80℃ when the content is 20%. The proton conductivities decrease at low temperatures, and increase with the increase of temperature. The proton conductivities is equivalent to that of Nafion 115 when the temperature is 80℃.
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