| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings
|
| Presentation Title |
Improvement of Hydrophilicity and Wetting Behavior on Patterned PLA Substrates by AP Plasma Treatment and APTES Grafting |
| Author(s) |
Mai Ngọc Phương Uyên, Po-Yu Chen |
| On-Site Speaker (Planned) |
Mai Ngọc Phương Uyên |
| Abstract Scope |
Polylactic acid (PLA) substrates with tunable wettability and unidirectional wetting behavior were fabricated by combining 3D printing and surface modification. The atmospheric pressure plasma (APP) was used to modify the PLA surface, followed by grafting with (3-aminopropyl)triethoxysilane (APTES) in hydrolysis solution to achieve hydrophilicity with measured contact angle of ~45°. Atomic force microscopy (AFM) was applied to characterize morphology after different treatments. The success of hydrolyzed APTES grafting onto surface was confirmed by X-ray photoelectron spectroscopy (XPS), which showed increases in C1s, O1s and N1s peaks of the grafted sample compared to untreated and plasma treated sample. The effective hydrophilicity was certified by investigating the long-term durability in contact angles on the treated PLA samples after 20 days. Furthermore, arrowhead-structured arrays were designed and fabricated by 3D printing followed by AP plasma modification and grafting, which further exhibited unidirectional liquid transportation and can be applied in various fields. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Surface Modification and Coatings, Thin Films and Interfaces |