Highly Macroporous Polyimide with Chemical Versatility Prepared from Poly(amic acid) Salt-Stabilized High Internal
Jongmin Park1, Sunkyu Kim1,2, Jeonguk Hwang1
1Advanced Functional Polymers Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea.
ACS Omega
|April 8, 2024
Summary
We developed novel macroporous polyimide (Macro PI) materials using poly(amic acid) salt (PAAS) polymers. These advanced materials offer high porosity and controlled structures for applications like lithium-metal batteries.
Area of Science:
- Materials Science
- Polymer Chemistry
- Electrochemistry
Background:
- Macroporous polymers offer unique mass transport and size-selective properties.
- Polyimide (PI) is a high-performance polymer suitable for macroporous structures.
- Existing methods for macroporous PI (Macro PI) have limitations in chemical diversity and pore structure control.
Purpose of the Study:
- To develop novel macroporous polyimide (Macro PI) materials with enhanced properties.
- To investigate the role of poly(amic acid) salt (PAAS) polymers in creating stable high internal phase emulsions (HIPEs).
- To explore structure-property relationships and applications of the synthesized Macro PIs.
Main Methods:
- Systematic investigation of 12 different PAAS polymers as macrosurfactants and matrices.
- Formation of stable HIPEs with >80 vol % internal volume.
- Characterization of Macro PIs, including porosity (>99 vol %) and pore size distribution after thermal imidization.
Main Results:
- Achieved stable HIPEs using diverse PAAS polymers.
- Synthesized Macro PIs with exceptional porosity (>99 vol %).
- Demonstrated the utility of Macro PIs as effective separators in Li-metal batteries, enabling stable cycling.
Conclusions:
- PAAS polymers are effective in creating advanced Macro PI materials.
- Controlled pore structures in Macro PIs are crucial for performance.
- Developed Macro PIs show significant promise for energy storage applications, particularly as Li-metal battery separators.
