新穎材料農業：友善環境農業新穎材料研發與安全評估【土環系薛涵宇助理教授】
論文篇名 英文：Bioinspired Durable Superhydrophobic Surface from Hierarchically Wrinkled Nanoporous Polymer
中文：仿生之超疏水多尺度奈米多孔皺褶表
期刊名稱 ACS APPLIED MATERIALS & INTERFACES
發表年份,卷數,起迄頁數 2019/11/40875-40885
作者 T.-L. Chen, C.-Y. Huang, Y.-T. Xie, Y.-Y. Chiang, Y.-M. Chen, H.-Y. Hsueh(薛涵宇)*
DOI 10.1021/acsami.9b14325
中文摘要 受複雜多功能葉片的啟發，在本研究中，我們創造了堅固的分層皺褶、奈米多孔聚四氟乙烯（PTFE）表面，通過在市售的可熱收縮聚苯乙烯（PS）板材上結合PTFE微胞化和自發表面起皺，表現出超疏水性。將PTFE分散液塗佈在PS片上，然後進行熱處理以除去PTFE顆粒周圍的界面活性劑，並通過動態熱收縮過程誘導表面起皺。來自PS片材的熱誘導收縮提供了使微米級皺褶形成的驅動力，而奈米尺寸的PTFE顆粒聚集體形成剛性奈米多孔膜，提供其固有的疏水特性。通過結合多層次界面結構和化學成分，製備出分層起皺的奈米多孔PTFE表面，其表現出極高的防水性（水接觸角為~167°）和低於5°的水滾動角。藉由皺褶圖案的曲面特性和黏性液體(界面活性劑)使黏附力增強，讓PS片材與奈米多孔PTFE層緊密結合，使這些表面具有機械強度，並提供具有自清潔，防污和減阻性能的潛在可擴展替代品。
英文摘要 Inspired by complex multifunctional leaves, in this study, we created robust hierarchically wrinkled nanoporous polytetrafluoroethene (PTFE) surfaces that exhibit superhydrophobic properties by combination of PTFE micellization and spontaneous surface wrinkling on a commercially available thermoretractable polystyrene (PS) sheet. A PTFE dispersion was coated onto the PS sheet, followed by thermal treatment to remove the surfactants surrounding the PTFE particles, and surface wrinkling was induced through a dynamic thermal contraction process. Thermally induced contraction from the PS sheet provided the driving force for developing and stabilizing micrometer-sized wrinkle formation, whereas the nanometer-sized PTFE particle aggregation formed a rigid nanoporous film, providing its intrinsic hydrophobic character. By combining the hierarchical interfacial structure and chemical composition, hierarchically wrinkled nanoporous PTFE surfaces were fabricated, which exhibited extremely high water repellence (water contact angle of ∼167°) and a water rolling-off angle lower than 5°. The wrinkled patterns could intimately bind the nanoporous PTFE layer through enhanced adhesion from their curved surface and viscous liquid surfactants, making these surfaces mechanically robust and offering potentially extendable alternatives with selfcleaning, antifouling, and drag-reducing properties.