Nanonetwork Thermosets from Templated Polymerization for Enhanced Energy Dissipation
| Autor: | Cheng Yen Chang, Yung Hsuan Chang, Chang-Chun Lee, Rong-Ming Ho, Ping Chi Tsai, Suhail K. Siddique, Yeau-Ren Jeng, Edwin L. Thomas, Shou-Yi Chang, Tze Chung Lin |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Tripod (photography) Diamond Bioengineering 02 engineering and technology General Chemistry Epoxy Nanonetwork engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Polymerization visual_art Copolymer engineering visual_art.visual_art_medium General Materials Science Diamond cubic Composite material 0210 nano-technology Gyroid |
| Zdroj: | Nano letters. 21(8) |
| ISSN: | 1530-6992 |
| Popis: | Herein, we aim to develop a facile method for the fabrication of mechanical metamaterials from templated polymerization of thermosets including phenolic and epoxy resins using self-assembled block copolymer, polystyrene-polydimethylsiloxane with tripod network (gyroid), and tetrapod network (diamond) structures, as templates. Nanoindentation studies on the nanonetwork thermosets fabricated reveal enhanced energy dissipation from intrinsic brittle thermosets due to the deliberate structuring; the calculated energy dissipation for gyroid phenolic resins is 0.23 nJ whereas the one with diamond structure gives a value of 0.33 nJ. Consistently, the gyroid-structured epoxy gives a high energy dissipation value of 0.57 nJ, and the one with diamond structure could reach 0.78 nJ. These enhanced properties are attributed to the isotropic periodicity of the nanonetwork texture with plastic deformation, and the higher number of struts in the tetrapod diamond network in contrast to tripod gyroid, as confirmed by the finite element analysis. |
| Databáze: | OpenAIRE |
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