Evaluation of the hydrophobic and barrier properties of the polyurethane coatings covered by stearic acid thin layer

Anh Son Nguyen, Thuy Duong Nguyen, Thu Thuy Pham, Ke Oanh Vu, Thi Xuan Hang To, Lan Phuong Trinh, Xuan Thang Dam, Minh Quy Bui
Author affiliations

Authors

  • Anh Son Nguyen Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Thuy Duong Nguyen Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Thu Thuy Pham Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Ke Oanh Vu Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Thi Xuan Hang To Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Lan Phuong Trinh Department of Chemical Technology, Hanoi University of Industry, Hanoi, Vietnam https://orcid.org/0009-0000-8722-9446
  • Xuan Thang Dam Department of Chemical Technology, Hanoi University of Industry, Hanoi, Vietnam
  • Minh Quy Bui Faculty of Chemistry, Thai Nguyen University of Sciences, Thai Nguyen, Vietnam https://orcid.org/0000-0002-6378-4899

DOI:

https://doi.org/10.15625/0868-3166/18506

Abstract

In this paper, a thin stearic acid (SA) film was deposited onto the polyurethane (PU) coatings with different concentrations of stearic acid in the ethanol (1 wt.%, 2 wt.% and 3 wt.%) by centrifuged technique. Fourier transform infrared spectra (FTIR) and water contact angle (WCA) method were performed to characterize and evaluate the hydrophobic layer formed on the surface of the samples. Then, the barrier property of the PU/SA was assessed by using electrochemical impedance spectroscopy (EIS) and accelerated salt spray test method. The results show that the presence of the stearic acid layer was effective for both hydrophobic and barrier properties, especially the samples prepared with 3 wt.% stearic acid. This work landmarks the need for improving the protection ability of polyurethane coatings for a metallic substrate.

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Published

15-12-2023

How to Cite

[1]
A. S. Nguyen, “Evaluation of the hydrophobic and barrier properties of the polyurethane coatings covered by stearic acid thin layer”, Comm. Phys., vol. 33, no. 4, p. 447, Dec. 2023.

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Papers
Received 12-07-2023
Accepted 19-09-2023
Published 15-12-2023

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