55 / 2018-07-19 11:39:28

Design and Manufacturing of Bio-inspired Liquid Superrepellent Structures via TPP Technology

Bio-inspired,Liquid superrepellent,Two-photon polymerization

全体主题 > i. Novel additive manufacturing mechatronic systems, in particular, 3D bioprinting platforms

Bio-inspired water adhesion and repellence, having attracted much attentions in scientific research due to the exploration of lotus leaf, butterfly wing, rose petal et al., are one important aspect in the field of interface wetting. To achieve high water or oil repellent surfaces, various approaches, such as etching and templating, are employed to mimic hierarchical micro/nano structures and low surface energy coatings are universally adopted. So far, numerous synthetic strategies have been reported for achieving liquid superrepellence, including superhydrophobicity and superoleophobicity, which are highly dependent on surface chemistry, structures and substrates. Herein, triply re-entrant structures, possessing superrepellence to water (with surface tension of 72.8 mN/m2) and various organic liquids (with surface tension of 12.0-27.1 mN/m2), have been fabricated via two-photon polymerization (TPP) based 3D printing technology. Such structures can be constructed both on rigid and flexible substrates, and the liquid superrepellent properties can be kept even after oxygen plasma treatment. The fabricated arrays can find wide applications in high-throughput biological/ chemical sensors, microfluidic devices, optical display and chemical/ physical micro reactors.
Two-photon polymerization based 3D printing technique was employed due to its remarkable advantage in processing resolution (lateral resolution can be as high as < 100 nm) and high speed (> 30 000 μm s-1). This technique will arise much more attention because its values in microfluidic chip manufacturing and compatibility for various substrates.