Work

Development of Nano‐ ZnO ‐Modified Rosin‐Based Waterborne Polyurethane Coatings for Hydrophobicity, UV Resistance, and Anticorrosion Properties

Year: 2026

Type: article

Abstract: ABSTRACT To improve the mechanical properties, eco‐friendliness, and anti‐corrosion properties of waterborne polyurethane (WPU) coatings, a nano‐ZnO‐modified rosin‐based waterborne polyurethane (ZnRWPU) was synthesized via a prepolymerization method. The synthesis involved reacting silane coupling agent KH550‐modified nano‐ZnO (KH550@ZnO) with rosin‐based acrylate glycol diol and isophorone diisocyanate (IPDI). The structure of the polyurethane was characterized by fourier transform infrared (FT‐IR) spectra and X‐ray powder diffractometer (XRD), ultraviolet spectra (UV–vis) for UV absorption capacity, thermogravimetry (TG) for thermal stability, water contact angle and water absorption for water resistance, and electrochemistry for corrosion resistance of the coating. The results showed that nano‐ZnO could effectively improve the hydrophobicity, thermal stability, and UV protection of ZnRWPU, and the corrosion resistance of ZnRWPU in acid alkali and salt corrosion solutions were all increased compared with the RWPU without nano‐ZnO. The optimal corrosion resistance was observed when the amount of nano‐ZnO was 0.6 wt%. The successful integration of rosin with nano‐ZnO modification offers a viable strategy for designing a new generation of high‐performance, bio‐based WPU coatings.

Source: Journal of Vinyl and Additive Technology

DOI: 10.1002/vnl.70069

Authors: Jiawei Pan, Jie Cheng, Caili Yu, Xiang Xu, Faai Zhang

Institution: Guilin University of Technology

Language: English

Topic: Corrosion Behavior and Inhibition

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Guilin University of Technology, Division of Graduate Education

Award: G7205912727