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    ABSTRACT: Superhydrophobic coating is a very useful method to lower the moisture adsorption and improve the reliability of electronic devices. Here we report a facile fabrication of superhydrophobic surfaces by functionalization of graphene oxide (GO), an important precursor for preparing graphene. Several aliphatic amines molecules were used to react with GO, including hexamine, dodecylamine, hexadecylamine and octadecylamine. These amphiphilic amine molecules, with hydrophobic tails and hydrophilic heads, are chemically grafted onto the GO surface by nucleophilic reaction between epoxide and amine groups. The hydrophobic tail is exposed which lower the surface energy of modified GO sheets. The functionalized GO films exhibit an enhanced surface roughness, which is essential for the superhydrophobicity. It was found that only hexadecylamine and octadecylamine lead to superhydrophobicity after a previously developed functionalization reaction. For octadecylamine-modified GO film, a large contact angle (above 150°) and low hysteresis (below 5°) was observed. Such superhydrophobic coating can be applied on electronic devices by various methods, such as drop coating, dip coating and spray coating. This method is promising in terms of low-cost and large-scale superhydrophobic coatings for device protection.
    Proceedings - Electronic Components and Technology Conference 01/2011;
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    ABSTRACT: A facile method for preparation of fluorinated polyacrylate was developed. Novel multifunctional graft copolymer (GPF-1, 2, 3) containing short fluoroalkyl side chains and reactive groups were successfully prepared by grafting fluoroalcohols to polyacrylate. The obtained products were characterized by 1H NMR, 19F NMR, FTIR, GPC, TGA, and XPS analyses. GPF-1, 2, 3 exhibited very low surface free energy (17.77–25.81 mJ/m2). Cotton fabric treated by GPF-1 had the highest water and oil repellency rating which was 100 and 6, respectively (AATCC test methods). The water and oil repellency rating was kept as 90 and 5, respectively, after 10 soaping cycles or 2 h uninterrupted soaping which indicated a very good washing durability. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
    Journal of Applied Polymer Science 07/2010; 119(1):84 - 92. · 1.40 Impact Factor
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    ABSTRACT: Through evolution, nature has arrived at what is optimal. Inspired by the biomaterials with special wettability, superhydrophobic materials have been well-investigated and -covered by several excellent reviews. The construction of superoleophobicity is more difficult than that of superhydrophobicity because the surface tension of oil or other organic liquids is lower than that of water. However, superoleophobic surfaces have drawn a great deal of attention for both fundamental research and practical applications in a variety of fields. In this contribution, we focus on recent research progress in the design, fabrication, and application of bio-inspired superoleophobic and smart surfaces, including superoleophobic–superhydrophobic surfaces, oleophobic–hydrophilic surfaces, underwater superoleophobic surfaces, and smart surfaces. Although the research of bio-inspired superoleophobicity is in its infancy, it is a rapidly growing and enormously promising field. The remaining challenges and future outlook of this field are also addressed. Multifunctional integration is a inherent characteristic for biological materials. Learning from nature has long been a source of bio-inspiration for scientists and engineers. Therefore, further cross-disciplinary cooperation is essential for the construction of multifunctional advanced superoleophobic surfaces through learning the optimized biological solutions from nature. We hope this review will provide some inspirations to the researchers in the field of material science, chemistry, physics, biology, and engineering.
    Progress in Materials Science 05/2013; 58(4):503–564. · 23.19 Impact Factor

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