Facile fabrication of superhydrophobic alloy surface based on room temperature vulcanized silicone modification

  • Shangda Chen
  • Hao Wang
  • Zuteng Wan
  • Ling Chen
  • Yangchengyi Liu
  • Hanghai Fan
  • Bowen Zhong
  • Xiufeng WangEmail author


Superhydrophobicity of alloy surfaces is generally determined by the low-energy chemical composition and geometric structure of the surface. The appropriate geometry on alloy surfaces can be easily constructed via chemical etching methods. However, the subsequent low-energy modifications for pre-etched alloys are time-consuming or expensive, thus preventing their further application. Here, we prepared superhydrophobic alloy surfaces based on combining wet chemical etching and room temperature vulcanized (RTV) silicone treatment. Compared to traditional immersion methods, RTV silicone treatment for superhydrophobic 6061 Al alloy surfaces needs only 30 s, which is several thousand times faster than stearic acid or polymethyl triethoxy silane solution treatment. Mechanisms of RTV silicone treatment were investigated. The results show that dip-coating modification is different from these traditional methods. We found that the optimized proportion for RTV silicone rubber is HPDMS, PMTSi, and DBTDL with hexane solvent (HPDMS:PMTSi:DBTDL:hexane = 4:3:1:46, weight ratio), and the water contact angles of treated surfaces of pre-etched 6061 Al alloy, pure Al, and steels are 159° ± 2.7°, 168° ± 1.2°, and 169° ± 1.5°, respectively. Herein, our results demonstrate a facile, low-cost strategy to fabricate superhydrophobic alloy surface that is notable and easy to scale up for industrial applications.


Superhydrophobic alloy surface RTV silicone Immersing modification Curing reaction 



The authors acknowledge the financial support to this research from the National Natural Science Foundation of China through Grants 11872326 and Natural Science Foundation of Hunan Province through Grants 2018JJ2379 and 2018JJ2396 and Open Fund from Institute of Flexible Electronics Technology of THU (2019KF1102).


  1. 1.
    Quéré, D, “Wetting and Roughness.” Annu. Rev. Mater. Res., 38 71–99 (2008)CrossRefGoogle Scholar
  2. 2.
    Gao, XJ, Wang, XF, Ouyang, XP, Wen, C, “Flexible Superhydrophobic and Superoleophilic MoS2 Sponge for Highly Efficient Oil–Water Separation.” Sci. Rep., 6 27207 (2016)CrossRefGoogle Scholar
  3. 3.
    Simpson, JT, Hunter, SR, Aytug, T, “Superhydrophobic Materials and Coatings: A Review.” Rep. Prog. Phys., 78 (8) 086501 (2015)CrossRefGoogle Scholar
  4. 4.
    Wan, ZT, Li, D, Jiao, YL, Ouyang, XP, Chang, LQ, Wang, XF, “Bifunctional MoS2 Coated Melamine–Formaldehyde Sponges for Efficient Oil–Water Separation and Water-Soluble Dye Removal.” Appl. Mater. Today, 9 551–559 (2017)CrossRefGoogle Scholar
  5. 5.
    Li, J, Yan, L, Tang, X, Feng, H, Hu, D, Zha, F, “Robust Superhydrophobic Fabric Bag Filled with Polyurethane Sponges Used for Vacuum-Assisted Continuous and Ultrafast Absorption and Collection of Oils From Water.” Adv. Mater. Interfaces (2016). Google Scholar
  6. 6.
    Li, J, Xu, C, Zhang, Y, Wang, R, Zha, F, She, H, “Robust Superhydrophobic Attapulgite Coated Polyurethane Sponge for Efficient Immiscible Oil/Water Mixture and Emulsion Separation.” J. Mater. Chem. A, 4 (40) 15546–15553 (2016)CrossRefGoogle Scholar
  7. 7.
    Li, J, Kang, R, Tang, X, She, H, Yang, Y, Zha, F, “Superhydrophobic Meshes that Can Repel Hot Water and Strong Corrosive Liquids Used for Efficient Gravity-Driven Oil/Water Separation.” Nanoscale, 8 (14) 7638–7645 (2016)CrossRefGoogle Scholar
  8. 8.
    Arianpour, F, Farhadi, S, Farzaneh, M, “Effect of Heterogeneity on Hydro/Ice-Phobic Properties of Alkylsilane/Fluoro-Alkylsilane-Based Coatings on Al Substrates.” J. Coat. Technol. Res., 14 (1) 267–275 (2017)CrossRefGoogle Scholar
  9. 9.
    Chen, X, Cao, X, Chen, G, Ma, Y, Wang, F, “Fabrication of Superhydrophobic Surfaces via Poly (methyl methacrylate)-modified Anodic Aluminum Oxide Membrane.” J. Coat. Technol. Res., 11 (5) 711–716 (2014)CrossRefGoogle Scholar
  10. 10.
    Mohan Raj, R, Raj, V, “Fabrication of Superhydrophobic Coatings for Combating Bacterial Colonization on Al with Relevance to Marine and Medical Applications.” J. Coat. Technol. Res., 15 (1) 51–64 (2018)CrossRefGoogle Scholar
  11. 11.
    Qi, C, Zheng, Y, Cao, L, Gao, J, Wan, Y, “Preparation and Performance of Sol–Gel-Derived Alumina Film Modified by Stearic Acid.” J. Sol Gel Sci. Technol., 78 (3) 641–646 (2016)CrossRefGoogle Scholar
  12. 12.
    Aurelie, L, David, Q, “Superhydrophobic States.” Nat. Mater., 2 (7) 457–460 (2003)CrossRefGoogle Scholar
  13. 13.
    Wenzel, RN, “Resistance of Solid Surfaces to Wetting by Water.” Ind. Eng. Chem., 28 (8) 988–994 (1936)CrossRefGoogle Scholar
  14. 14.
    Jagdheesh, R, García-Ballesteros, J, Ocaña, J, “One-Step Fabrication of Near Superhydrophobic Aluminum Surface by Nanosecond Laser Ablation.” Appl. Surf. Sci., 374 2–11 (2016)CrossRefGoogle Scholar
  15. 15.
    Tsujii, K, Yamamoto, T, Onda, T, Shibuichi, S, “Super Oil-Repellent Surfaces.” Angew. Chem. Int. Ed., 36 (9) 1011–1012 (1997)CrossRefGoogle Scholar
  16. 16.
    Gao, XJ, Tong, WJ, Ouyang, XP, Wang, XF, “Facile Fabrication of a Superhydrophobic Titanium Surface with Mechanical Durability by Chemical Etching.” RSC Adv., 5 84666–84672 (2015)CrossRefGoogle Scholar
  17. 17.
    Wu, W, Wang, X, Liu, X, Zhou, F, “Spray-Coated Fluorine-Free Superhydrophobic Coatings with Easy Repairability and Applicability.” ACS Appl. Mater. Interfaces, 1 (8) 1656–1661 (2009)CrossRefGoogle Scholar
  18. 18.
    Li, J, Zhao, Z, Zhang, Y, Xiang, B, Tang, X, She, H, “Facile Fabrication of Superhydrophobic Silica Coatings with Excellent Corrosion Resistance and Liquid Marbles.” J. Sol Gel Sci. Technol., 80 (1) 208–214 (2016)CrossRefGoogle Scholar
  19. 19.
    Wang, Q, Zhang, B, Qu, M, Zhang, J, He, D, “Fabrication of Superhydrophobic Surfaces on Engineering Material Surfaces with Stearic Acid.” Appl. Surf. Sci., 254 (7) 2009–2012 (2008)CrossRefGoogle Scholar
  20. 20.
    Forooshani, HM, Aliofkhazraei, M, Rouhaghdam, AS, “Superhydrophobic Aluminum Surfaces by Mechanical/Chemical Combined Method and Its Corrosion Behavior.” J. Taiwan Inst. Chem. Eng., 72 220–235 (2017)CrossRefGoogle Scholar
  21. 21.
    Wang, J, Ober, CK, “Self-Organizing Materials with Low Surface Energy: The Synthesis and Solid-State Properties of Semifluorinated Side-Chain Ionenes.” Macromolecules, 30 (24) 7560–7567 (1997)CrossRefGoogle Scholar
  22. 22.
    Wang, N, Xiong, D, Deng, Y, Shi, Y, Wang, K, “Mechanically Robust Superhydrophobic Steel Surface with Anti-icing, UV-Durability, and Corrosion Resistance Properties.” ACS Appl. Mater. Interfaces, 7 (11) 6260–6272 (2015)CrossRefGoogle Scholar
  23. 23.
    Xu, W, Song, J, Sun, J, Dou, Q, Fan, X, “Fabrication of Superhydrophobic Surfaces on Aluminum Substrates Using NaNO3 Electrolytes.” J. Mater. Sci., 46 (18) 5925 (2011)CrossRefGoogle Scholar
  24. 24.
    Momen, G, Farzaneh, M, Jafari, R, “Wettability Behaviour of RTV Silicone Rubber Coated on Nanostructured Aluminium Surface.” Appl. Surf. Sci., 257 (15) 6489–6493 (2011)CrossRefGoogle Scholar
  25. 25.
    Yin, L, Wang, Y, Ding, J, Wang, Q, Chen, Q, “Water Condensation on Superhydrophobic Aluminum Surfaces with Different Low-Surface-Energy Coatings.” Appl. Surf. Sci., 258 (8) 4063–4068 (2012)CrossRefGoogle Scholar
  26. 26.
    Zhang, H, Yang, J, Chen, B, Liu, C, Zhang, M, Li, C, “Fabrication of Superhydrophobic Textured Steel Surface for Anti-corrosion and Tribological Properties.” Appl. Surf. Sci., 359 905–910 (2015)CrossRefGoogle Scholar
  27. 27.
    Li, X, Zhang, Q, Guo, Z, Shi, T, Yu, J, Tang, M, Huang, X, “Fabrication of Superhydrophobic Surface with Improved Corrosion Inhibition on 6061 Aluminum Alloy Substrate.” Appl. Surf. Sci., 342 76–83 (2015)CrossRefGoogle Scholar
  28. 28.
    Wei, Z, Jiang, D, Chen, J, Ren, S, Li, L, “Fabrication of Mechanically Robust Superhydrophobic Aluminum Surface by Acid Etching and Stearic Acid Modification.” J. Adhes. Sci. Technol., 31 2380–2397 (2017)CrossRefGoogle Scholar
  29. 29.
    Liu, L, Zhao, J, Zhang, Y, Zhao, F, Zhang, Y, “Fabrication of Superhydrophobic Surface by Hierarchical Growth of Lotus-Leaf-Like Boehmite on Aluminum Foil.” J. Colloid Interface Sci., 358 (1) 277–283 (2011)CrossRefGoogle Scholar
  30. 30.
    Feng, L, Zhang, H, Wang, Z, Liu, Y, “Superhydrophobic Aluminum Alloy Surface: Fabrication, Structure, and Corrosion Resistance.” Colloids Surf. A Physicochem. Eng. Asp., 441 319–325 (2014)CrossRefGoogle Scholar
  31. 31.
    Qian, B, Shen, Z, “Fabrication of Superhydrophobic Surfaces by Dislocation-Selective Chemical Etching on Aluminum, Copper, and Zinc Substrates.” Langmuir, 21 (20) 9007–9009 (2005)CrossRefGoogle Scholar
  32. 32.
    Li, L, Huang, T, Lei, J, He, J, Qu, L, Huang, P, Zhou, W, Li, N, Pan, F, “Robust Biomimetic-Structural Superhydrophobic Surface on Aluminum Alloy.” ACS Appl. Mater. Interfaces, 7 (3) 1449–1457 (2015)CrossRefGoogle Scholar
  33. 33.
    Song, HJ, Shen, XQ, “Fabrication of Functionalized Aluminum Compound Petallike Structure with Superhydrophobic Surface.” Surf. Interface Anal., 42 (3) 165–168 (2010)CrossRefGoogle Scholar
  34. 34.
    Kim, A, Lee, C, Kim, H, Kim, J, “Simple Approach to Superhydrophobic Nanostructured Al for Practical Antifrosting Application Based on Enhanced Self-propelled Jumping Droplets.” ACS Appl. Mater. Interfaces, 7 (13) 7206–7213 (2015)CrossRefGoogle Scholar
  35. 35.
    Liu, Y, Liu, J, Li, S, Liu, J, Han, Z, Ren, L, “Biomimetic Superhydrophobic Surface of High Adhesion Fabricated with Micronano Binary Structure on Aluminum Alloy.” ACS Appl. Mater. Interfaces, 5 (18) 8907–8914 (2013)CrossRefGoogle Scholar
  36. 36.
    Ruan, M, Li, W, Wang, B, Deng, B, Ma, F, Yu, Z, “Preparation and Anti-icing Behavior of Superhydrophobic Surfaces on Aluminum Alloy Substrates.” Langmuir, 29 (27) 8482–8491 (2013)CrossRefGoogle Scholar
  37. 37.
    Peng, S, Yang, X, Tian, D, Deng, W, “Chemically Stable and Mechanically Durable Superamphiphobic Aluminum Surface with a Micro/Nanoscale Binary Structure.” ACS Appl. Mater. Interfaces, 6 (17) 15188–15197 (2014)CrossRefGoogle Scholar
  38. 38.
    Wang, Y, Liu, X, Zhang, H, Zhou, Z, “Fabrication of Superhydrophobic Surface with Different Metal Films on Aluminum Alloy.” Chem. Res. Chin. Univ., 32 (2) 155–158 (2016)CrossRefGoogle Scholar
  39. 39.
    Kondo, R, Nakajima, D, Kikuchi, T, Natsui, S, Suzuki, RO, “Superhydrophilic and Superhydrophobic Aluminum Alloys Fabricated via Pyrophosphoric Acid Anodizing and Fluorinated SAM Modification.” J. Alloys Compd., 725 379–387 (2017)CrossRefGoogle Scholar
  40. 40.
    Varshney, P, Mohapatra, SS, Kumar, A, “Fabrication of Mechanically Stable Superhydrophobic Aluminium Surface with Excellent Self-Cleaning and Anti-fogging Properties.” Biomimetics, 2 (1) 2 (2017)CrossRefGoogle Scholar
  41. 41.
    Bele, A, Cazacu, M, Racles, C, Stiubianu, G, Ovezea, D, Ignat, M, “Tuning the Electromechanical Properties of Silicones by Crosslinking Agent.” Adv. Eng. Mater., 17 (9) 1302–1312 (2015)CrossRefGoogle Scholar
  42. 42.
    Zheng, C, Wang, G, Chu, Y, Xu, Y, Qiu, M, Xu, M, “RTV Silicone Rubber Surface Modification for Cell Biocompatibility by Negative-Ion Implantation.” Nucl. Inst. Methods Phys. Res. B, 370 73–78 (2016)CrossRefGoogle Scholar
  43. 43.
    Ren, LF, Xia, F, Shao, J, Zhang, X, Li, J, “Experimental Investigation of the Effect of Electrospinning Parameters on Properties of Superhydrophobic PDMS/PMMA Membrane and Its Application in Membrane Distillation.” Desalination, 404 155–166 (2017)CrossRefGoogle Scholar
  44. 44.
    Yang, D, Liu, X, Jin, Y, Zhu, Y, Zeng, D, Jiang, X, Ma, H, “Electrospinning of Poly(dimethylsiloxane)/poly(methyl methacrylate) Nanofibrous Membrane: Fabrication and Application in Protein Microarrays.” Biomacromolecules, 10 (12) 3335–3340 (2009)CrossRefGoogle Scholar
  45. 45.
    Salam, KT and Sirait, S, “Evaluation of Surface Degradation of Silicone Rubber Under Natural Tropical Aging Using Thermogravimetric and Thermomechanical Analysis.” Proceedings of the 6th International Conference on Properties and Applications of Dielectric Materials, 2000Google Scholar
  46. 46.
    Huang, Y, Sarkar, DK, Chen, XG, “Superhydrophobic Aluminum Alloy Surfaces Prepared by Chemical Etching Process and Their Corrosion Resistance Properties.” Appl. Surf. Sci., 356 1012–1024 (2015)CrossRefGoogle Scholar
  47. 47.
    Song, J, Xu, W, Lu, Y, “One-Step Electrochemical Machining of Superhydrophobic Surfaces on Aluminum Substrates.” J. Mater. Sci., 47 (1) 162–168 (2012)CrossRefGoogle Scholar

Copyright information

© American Coatings Association 2019

Authors and Affiliations

  • Shangda Chen
    • 1
  • Hao Wang
    • 1
  • Zuteng Wan
    • 1
  • Ling Chen
    • 1
  • Yangchengyi Liu
    • 1
  • Hanghai Fan
    • 1
  • Bowen Zhong
    • 1
  • Xiufeng Wang
    • 1
    • 2
    Email author
  1. 1.School of Materials Science and EngineeringXiangtan UniversityHunanChina
  2. 2.Institute of Flexible Electronics Technology of THUJiaxing, ZhejiangChina

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