Enhancing shock wave energy dissipation in metallosupramolecular polymer by tuning metal-imidazole coordination interactions
The development of materials capable of shock wave energy dissipation (SWED) is critical for modern protective applications. In this study, metallosupramolecular poly(dimethylsiloxane) (PDMS) networks cross-linked with Zn2+, Cu2+, and Ni2+ ions and imidazole ligands were designed to enhance SWED by...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941825001990 |
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| Summary: | The development of materials capable of shock wave energy dissipation (SWED) is critical for modern protective applications. In this study, metallosupramolecular poly(dimethylsiloxane) (PDMS) networks cross-linked with Zn2+, Cu2+, and Ni2+ ions and imidazole ligands were designed to enhance SWED by leveraging the dynamic nature of metal-ligand coordination bonds. A laser-induced shock wave technique revealed that Cu2+ cross-linked PDMS exhibited superior SWED performance, likely due to coordination rearrangement dynamics occurring within a relevant timescale for shock wave dissipation. Time-temperature superposition (TTS) analysis indicated that while associative ligand exchange may assist in shock attenuation, metal-ligand bond dissociation plays a more dominant role under extreme shock conditions. DFT calculations further demonstrated that coordination geometry significantly influences SWED performance, with Cu2+ in square planar (trans) coordination exhibiting greater rupture susceptibility. These findings highlight the tunability of metal-ligand interactions as an effective strategy for optimizing energy dissipation in metallosupramolecular polymers. Additionally, they provide a comprehensive SWED mechanism analysis by synergistically integrating a laser-induced shock wave test and DFT calculations. |
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| ISSN: | 1873-2348 |