High-temperature resistant and reprocessable silicone elastomer composites via tuning bonding interactions for efficient and healable thermal management
Article
Yang, Ling, Hu, Wanjun Hu, Qin, Yuqing, Cao, Chengfei, Li, Yang, Gong, Lixiu, Zhang, Guodong, Gao, Jiefeng, Song, Pingan and Tang, Longcheng. 2025. "High-temperature resistant and reprocessable silicone elastomer composites via tuning bonding interactions for efficient and healable thermal management." Composites Part B: Engineering. 295. https://doi.org/10.1016/j.compositesb.2025.112205
| Article Title | High-temperature resistant and reprocessable silicone elastomer composites via tuning bonding interactions for efficient and healable thermal management |
|---|---|
| ERA Journal ID | 4883 |
| Article Category | Article |
| Authors | Yang, Ling, Hu, Wanjun Hu, Qin, Yuqing, Cao, Chengfei, Li, Yang, Gong, Lixiu, Zhang, Guodong, Gao, Jiefeng, Song, Pingan and Tang, Longcheng |
| Journal Title | Composites Part B: Engineering |
| Journal Citation | 295 |
| Article Number | 112205 |
| Number of Pages | 12 |
| Year | 2025 |
| Publisher | Elsevier |
| Place of Publication | United Kingdom |
| ISSN | 1359-8368 |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compositesb.2025.112205 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S1359836825000952 |
| Abstract | Silicone elastomers with unique inorganic/organic molecular structures are widely used in many fields, but it has proven to be a critical challenge to achieve a trade-off between mechanical strength and heat resistance; for example, modifying elastomers by improving chains’ interactions produces enhanced strength/stretchability but inevitably causes significant loss in their thermal stability. Herein, we circumvent this inherent trade-off issue by incorporating multiple reversible dynamic bonds with high-temperature resistant features into a cross-linked polydimethylsiloxane (PDMS) network. Typically, appropriate imine bonds, boroxine bonds and coordination bonds are employed and optimized to construct PDMS molecular networks. Consequently, the resulting PDMS elastomers not only have 7–30 times increase in tensile strength and toughness compared with traditional PDMS elastomers, but also present exceptional healable and reprocessable performance (>95 % strength recovery) and maintain excellent high-temperature resistance (e.g., temperature at 5 wt% weight loss of ∼354 °C), superior to the previous modified silicone elastomers. Further, optimizing the size and content of thermally conductive fillers (Al2O3), the thermal conductivity of silicone composite reaches 0.8 W/mK, vitalizing the rapid heat conduction and dissipation. Moreover, the composite can be repeatedly self-healed and reprocessed, its tensile strength recovers 91 % and 93 %, demonstrating their efficient and healable thermal management. In addition, the composites maintain excellent high-temperature resistance (e.g., temperature at 5 wt% weight loss of ∼388 °C). This study provides a straightforward method for the preparation of thermal interface materials with strong, high-temperature resistant and self-healing materials for promising thermal management applications. |
| Keywords | High-temperature resistant; Silicone elastomer composites; Multiple dynamic bonds; Self-healing; Reprocessing |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Hangzhou Normal University, China |
| Hoshine Silicon Industry, China | |
| Yangzhou University, China | |
| Centre for Future Materials | |
| School of Agriculture and Environmental Science |
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