The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating
This study investigates the elevated-temperature mechanical and viscoelastic properties of a PDMS–silica-based superhydrophobic nanocomposite coating using nanoindentation and a nano-dynamic mechanical analysis over a temperature range of 24 °C to 160 °C. The nanoindentation load–displacement curves...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/15/12/898 |
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| author | Chun-Wei Yao Ian Lian Jiang Zhou Paul Bernazzani Mien Jao |
| author_facet | Chun-Wei Yao Ian Lian Jiang Zhou Paul Bernazzani Mien Jao |
| author_sort | Chun-Wei Yao |
| collection | DOAJ |
| description | This study investigates the elevated-temperature mechanical and viscoelastic properties of a PDMS–silica-based superhydrophobic nanocomposite coating using nanoindentation and a nano-dynamic mechanical analysis over a temperature range of 24 °C to 160 °C. The nanoindentation load–displacement curves exhibited consistent hysteresis, indicating a stable energy dissipation across the temperature range. Creep tests revealed an increased displacement and accelerated deformation at elevated temperatures, displaying a two-stage creep profile characterized by rapid primary and steady-state secondary creep. The hardness decreased with the creep time, while the strain rate sensitivity remained relatively stable, suggesting consistent deformation mechanisms. A time-dependent creep model incorporating linear and logarithmic terms accurately captured the experimental data. The nano-dynamic mechanical analysis results showed a decrease in the storage modulus with depth, while the loss modulus and tan δ peaked at shallow depths. These findings are crucial for the evaluation and design of superhydrophobic nanocomposite coatings. |
| format | Article |
| id | doaj-art-a1db84376a884c45a7bfe5d1007607fa |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-a1db84376a884c45a7bfe5d1007607fa2025-08-20T03:29:35ZengMDPI AGNanomaterials2079-49912025-06-01151289810.3390/nano15120898The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite CoatingChun-Wei Yao0Ian Lian1Jiang Zhou2Paul Bernazzani3Mien Jao4Department of Mechanical Engineering, Lamar University, Beaumont, TX 77710, USADepartment of Biology, Lamar University, Beaumont, TX 77710, USADepartment of Mechanical Engineering, Lamar University, Beaumont, TX 77710, USADepartment of Chemistry and Biochemistry, Lamar University, Beaumont, TX 77710, USADepartment of Civil and Environmental Engineering, Lamar University, Beaumont, TX 77710, USAThis study investigates the elevated-temperature mechanical and viscoelastic properties of a PDMS–silica-based superhydrophobic nanocomposite coating using nanoindentation and a nano-dynamic mechanical analysis over a temperature range of 24 °C to 160 °C. The nanoindentation load–displacement curves exhibited consistent hysteresis, indicating a stable energy dissipation across the temperature range. Creep tests revealed an increased displacement and accelerated deformation at elevated temperatures, displaying a two-stage creep profile characterized by rapid primary and steady-state secondary creep. The hardness decreased with the creep time, while the strain rate sensitivity remained relatively stable, suggesting consistent deformation mechanisms. A time-dependent creep model incorporating linear and logarithmic terms accurately captured the experimental data. The nano-dynamic mechanical analysis results showed a decrease in the storage modulus with depth, while the loss modulus and tan δ peaked at shallow depths. These findings are crucial for the evaluation and design of superhydrophobic nanocomposite coatings.https://www.mdpi.com/2079-4991/15/12/898nanocompositenanocreepnanoscale dynamic mechanical analysis |
| spellingShingle | Chun-Wei Yao Ian Lian Jiang Zhou Paul Bernazzani Mien Jao The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating Nanomaterials nanocomposite nanocreep nanoscale dynamic mechanical analysis |
| title | The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating |
| title_full | The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating |
| title_fullStr | The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating |
| title_full_unstemmed | The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating |
| title_short | The Elevated-Temperature Nano-Mechanical Properties of a PDMS–Silica-Based Superhydrophobic Nanocomposite Coating |
| title_sort | elevated temperature nano mechanical properties of a pdms silica based superhydrophobic nanocomposite coating |
| topic | nanocomposite nanocreep nanoscale dynamic mechanical analysis |
| url | https://www.mdpi.com/2079-4991/15/12/898 |
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