|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Biological Materials Science
||From Superhydrophobic to Superhydrophilic: Synthesis of Multifunctional Surfaces Inspired from Carnivorous Plants
||Po-Yu Chen, Zheng-Jun Shih, Yu-Min Lin, Po-Yi Chen
|On-Site Speaker (Planned)
The carnivorous plant Nepenthes utilizes a specialized pitcher to attract, capture, trap and digest insects to survive in infertile environments. The peristome can be completely wetted, forming a superhydrophilic, directional water-lubricated, slippery trap. Hierarchical ridge-like and anisotropic microstructures of peristome enhance the wetting efficiency. PDMS was used to replicate peristome-like surfaces, which exhibited superhydrophobicity and water repellency. Atmospheric-pressure plasma treatment followed by hydrophilic PEG grafting were further applied to modify surfaces from superhydrophobic to hydrophilic/superhydrophilic. Micro-/nano-structural features and surface chemistry were characterized by SEM and XPS. Wetting behavior was evaluated by static and dynamic contact angle measurements and high speed camera. Results showed the Nepenthes’ peristome-like, PEG grafted PDMS replicas exhibited long-term hydrophilicity and directional wetting behavior. Through materials selection, hierarchical structural design and surface modification, multifunctional bio-inspired surfaces with tunable, anisotropic wettability were successfully synthesized which can be potentially applied in self-lubricating/smart surfaces, controlled drug delivery and micro-fluidic devices.
||Planned: Supplemental Proceedings volume