POS6-0809
Cellulose Acetate- and Sulfosuccinic Acid-Modified SPEEK Composite Electrolyte Membranes with Controlled Dimensional Stability and Ion Transport Properties
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Dongjun Lee (Hannam university, Department of Advanced Materials)
Co-Author(s)
Abstract
Polymer electrolyte materials require a balanced combination of ion transport capability, dimensional stability, and mechanical durability. In this study, sulfonated poly(ether ether ketone) (SPEEK)-based composite electrolyte membranes were prepared by incorporating cellulose acetate (CA), sulfosuccinic acid (SSA), and their combined components to investigate how each modification affects the structure–property relationship of the membrane. The effects of CA and SSA were compared in terms of water uptake, swelling behavior, mechanical properties, and humidity-dependent ion conductivity.
The incorporation of CA contributed to the stabilization of the SPEEK matrix by reinforcing intermolecular interactions and suppressing excessive dimensional changes. In contrast, SSA acted as a chemically reactive component that introduced covalent crosslinking points as well as additional sulfonic acid groups within the membrane structure. This dual contribution of SSA was expected to regulate both the formation of a stable polymer network and the distribution of ion-conducting sites. When CA and SSA were simultaneously incorporated, the composite membrane showed a more effective balance between structural stability and ion transport behavior than membranes modified with a single component.
Overall, the SPEEK/CA/SSA composite electrolyte membrane demonstrated improved structural integrity while maintaining favorable ion-conducting characteristics under controlled humidity conditions. These results suggest that the combined use of matrix reinforcement and chemical crosslinking is an effective strategy for designing stable hydrocarbon-based polymer electrolyte materials. This study provides a rational approach for controlling the structure, stability, and transport properties of advanced ion-conducting polymer membranes.
The incorporation of CA contributed to the stabilization of the SPEEK matrix by reinforcing intermolecular interactions and suppressing excessive dimensional changes. In contrast, SSA acted as a chemically reactive component that introduced covalent crosslinking points as well as additional sulfonic acid groups within the membrane structure. This dual contribution of SSA was expected to regulate both the formation of a stable polymer network and the distribution of ion-conducting sites. When CA and SSA were simultaneously incorporated, the composite membrane showed a more effective balance between structural stability and ion transport behavior than membranes modified with a single component.
Overall, the SPEEK/CA/SSA composite electrolyte membrane demonstrated improved structural integrity while maintaining favorable ion-conducting characteristics under controlled humidity conditions. These results suggest that the combined use of matrix reinforcement and chemical crosslinking is an effective strategy for designing stable hydrocarbon-based polymer electrolyte materials. This study provides a rational approach for controlling the structure, stability, and transport properties of advanced ion-conducting polymer membranes.
