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Multifunctional Silica-Silicone Nanocomposite with Regenerative Superhydrophobic Capabilities.

Abstract

Superhydrophobic surfaces have been garnering increased interest because of their adaptive characteristics. However, concerns regarding their durability and complex fabrication techniques have limited their widespread adoption. In our study, we have developed an effective, durable, and versatile silica-silicone nanocomposite that can be applied through spray coating or bulk synthesized as superhydrophobic monoliths through a facile, economic, and scalable fabrication technique. For spray-coated samples, superhydrophobicity was achieved for concentrations above 9%. However, poor adhesion was observed for concentrations above 20%. Through extensive surface morphology studies, it was determined that a delicate balance between the polymer and dispersed superhydrophobic silica nanoparticles exists at a concentration of 14%. This concentration is necessary for developing the desired hierarchical structure and providing sufficient adhesion with the substrate. The monoliths were fabricated into complex geometries, with superhydrophobicity being observed in the 5 and 9% specimens. The hierarchical structure was formed through controlled surface abrasion, which created the microscale roughness and concurrently exposed the embedded silica nanoparticles. It was found that a monolith with a concentration of 9% provides excellent water repellency as well as a suitable emulsion viscosity to facilitate the molding process. Though compressive loading (up to 10 MPa) damages the monolith, the superhydrophobic performance can be quickly restored through abrasive layer removal. Both spray-coated and monolith specimens retained their superhydrophobicity after being subjected to high temperatures (up to 350 °C) and corrosive environments (pH 1-13) for 2 h.

Authors+Show Affiliations

Mechanics and Aerospace Design Lab , University of Toronto , Toronto M5S 3G8 , Canada.Mechanics and Aerospace Design Lab , University of Toronto , Toronto M5S 3G8 , Canada.Mechanics and Aerospace Design Lab , University of Toronto , Toronto M5S 3G8 , Canada.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31623429

Citation

Elzaabalawy, Assem, et al. "Multifunctional Silica-Silicone Nanocomposite With Regenerative Superhydrophobic Capabilities." ACS Applied Materials & Interfaces, 2019.
Elzaabalawy A, Verberne P, Meguid SA. Multifunctional Silica-Silicone Nanocomposite with Regenerative Superhydrophobic Capabilities. ACS Appl Mater Interfaces. 2019.
Elzaabalawy, A., Verberne, P., & Meguid, S. A. (2019). Multifunctional Silica-Silicone Nanocomposite with Regenerative Superhydrophobic Capabilities. ACS Applied Materials & Interfaces, doi:10.1021/acsami.9b15445.
Elzaabalawy A, Verberne P, Meguid SA. Multifunctional Silica-Silicone Nanocomposite With Regenerative Superhydrophobic Capabilities. ACS Appl Mater Interfaces. 2019 Nov 1; PubMed PMID: 31623429.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multifunctional Silica-Silicone Nanocomposite with Regenerative Superhydrophobic Capabilities. AU - Elzaabalawy,Assem, AU - Verberne,Pieter, AU - Meguid,Shaker A, Y1 - 2019/11/01/ PY - 2019/10/19/pubmed PY - 2019/10/19/medline PY - 2019/10/19/entrez KW - nanocomposite KW - regenerative KW - silica nanoparticles KW - silicone KW - superhydrophobic JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces N2 - Superhydrophobic surfaces have been garnering increased interest because of their adaptive characteristics. However, concerns regarding their durability and complex fabrication techniques have limited their widespread adoption. In our study, we have developed an effective, durable, and versatile silica-silicone nanocomposite that can be applied through spray coating or bulk synthesized as superhydrophobic monoliths through a facile, economic, and scalable fabrication technique. For spray-coated samples, superhydrophobicity was achieved for concentrations above 9%. However, poor adhesion was observed for concentrations above 20%. Through extensive surface morphology studies, it was determined that a delicate balance between the polymer and dispersed superhydrophobic silica nanoparticles exists at a concentration of 14%. This concentration is necessary for developing the desired hierarchical structure and providing sufficient adhesion with the substrate. The monoliths were fabricated into complex geometries, with superhydrophobicity being observed in the 5 and 9% specimens. The hierarchical structure was formed through controlled surface abrasion, which created the microscale roughness and concurrently exposed the embedded silica nanoparticles. It was found that a monolith with a concentration of 9% provides excellent water repellency as well as a suitable emulsion viscosity to facilitate the molding process. Though compressive loading (up to 10 MPa) damages the monolith, the superhydrophobic performance can be quickly restored through abrasive layer removal. Both spray-coated and monolith specimens retained their superhydrophobicity after being subjected to high temperatures (up to 350 °C) and corrosive environments (pH 1-13) for 2 h. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/31623429/Multifunctional_Silica-Silicone_Nanocomposite_with_Regenerative_Superhydrophobic_Capabilities L2 - https://dx.doi.org/10.1021/acsami.9b15445 DB - PRIME DP - Unbound Medicine ER -