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Preparation of a low contact angle water-based coating using ultrasonic irradiation

X.R. Zhang (College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, People’s Republic of China)
L.Z. Liu (College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, People’s Republic of China, and College of Electrical and Electronic Engineering, Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, People’s Republic of China)
J.F. Li (College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, People’s Republic of China)
W.W. Cui (College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, People’s Republic of China)
L. Weng (College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, People’s Republic of China)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 3 November 2014

203

Abstract

Purpose

The key purpose of this study was to investigate the effects of different ultrasonic irradiation times on the wettability and other properties of the resulting water-based coating. The subject water-based coating was prepared using water-soluble polyester and amino resins by ultrasonic oscillation.

Design/methodology/approach

The coating was prepared by polymerising polyester and amino resins in water using ultrasonic oscillation. The coating was baked for 40 seconds at 350°C to coalesce and solidify the film. The contact angle, thermal stability and mechanical properties of the film, as well as the molecular weight (MW) and structure of the polyester resin, were determined.

Findings

The contact angle of the coating was found to decrease with ultrasonic irradiation; the mechanical properties and thermal stability were not altered when the irradiation time was longer than 5 hours. The MW of the polyester initially decreased then increased and stabilized with ultrasonic irradiation. The structure of polyester molecule and aggregated state of the solidified coating were not changed by ultrasonic irradiation.

Research limitations/implications

In the study reported here, the effects of different ultrasonic irradiation times were investigated. Results of this research could benefit in-depth understanding of the influence of ultrasonic treatment on polyester resins and polyester coatings and could further promote the development of water-based coatings.

Originality/value

The contact angle of the water-based coating decreased by mechanical means. The effects of ultrasound on microstructure and properties of the coating and resin were discussed in detail.

Keywords

Citation

Zhang, X.R., Liu, L.Z., Li, J.F., Cui, W.W. and Weng, L. (2014), "Preparation of a low contact angle water-based coating using ultrasonic irradiation", Pigment & Resin Technology, Vol. 43 No. 6, pp. 341-346. https://doi.org/10.1108/PRT-10-2013-0101

Publisher

:

Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited

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