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Dual hole patterned carbon nanotube composites with super-hydrophobic properties
Keywords: Superhydrophobic , Carbon nanotube, Composite
We report on a new type carbon nanotube (CNT)-polymer nanocomposites with superior surface properties. Such composites were synthesized through a new methodology for multifunctional nanotube composites, where Nanoimprint Lithography (NIL) techniques for dual hole pattern were used to form super-hydrophobic and scratch durable surface. Different with spray methods or chemical etching methods for conducting and super-hydrophobic coating layer, our strategy directly imprint super-hydrophobic pattern on the surface of nanocomposites through stamping hard (or soft) mold into a soft material. Therefore, it contains bulk properties (such as mechanical, electrical and microwave properties) and enhanced surface properties at one material. Such composite, e.g., CNT-PDMS (Polydimethylsiloxane), incorporate good dispersion of nanotubes and Nil techniques, yielding outstanding electrical properties (over 500 S/m for DC conductivity) with super-hydrophobic properties (contact angle ~ 167 degree) and microwave shielding efficiency, SE (over 100 dB) for electromagnetic interference (EMI) applications. In addition, dual hole pattern on nanocomposite surface enable long-term endurance against environment exposure while existing super-hydrophobic pattern are easily fragile. The above achievements are expected to lay a strong foundation for the widespread use of CNT composites for a whole of applications including electromagnetic interference shielding, microwave absorbing material, reinforce materials for vehicle, ship and structure unit, sensor device and solar cell electrodes.
Sung-Hoon Park,
Samsung Advanced Institute of Technology
Yongin-si, Gyeonggi-do

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