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<p>This study presents a sustainable approach to UV-curable coatings based on acrylated black seed oil (ABSO), synthesized via epoxide ring-opening with acrylic acid. ABSO was blended with 1,6-hexanediol diacrylate (HDDA) and photoinitiator Irgacure 184 to investigate the effect of blend ratio on photocuring kinetics and coating performance. FTIR and <sup>1</sup>H-NMR analyses confirmed successful acrylation of black seed oil. In situ FTIR monitoring revealed rapid photopolymerization, with acrylate conversion exceeding 90% within 1.2 s and nearing completion after 6 s under mercury lamp irradiation. The ABSO/HDDA ratio significantly influenced gel content, swelling behavior, and mechanical properties. Higher HDDA content increased crosslink density and surface hardness but reduced flexibility and adhesion, whereas ABSO-rich systems enhanced ductility and substrate compatibility due to their flexible triglyceride structure. The 60/40 ABSO/HDDA blend exhibited the best overall performance, combining high hardness (0.61), excellent adhesion (grade 0), strong impact resistance (119&#xa0;kg·cm), good flexibility (3&#xa0;mm), and full gloss after 6 s. Compared to EDMA-based systems, ABSO-based coatings demonstrated superior mechanical flexibility and interfacial performance while maintaining fast curing and surface durability. These findings underscore the potential of underutilized plant oils as reactive monomers for developing high-performance, environmentally friendly UV-curable coatings.</p>

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Organic coating of acrylated black seed oil/HDDA cured by photocrosslinking method: effect of blend ratio on the cross-linking reaction and its properties

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Dam Xuan Thang,
  • Pham Thi Thu Giang

摘要

This study presents a sustainable approach to UV-curable coatings based on acrylated black seed oil (ABSO), synthesized via epoxide ring-opening with acrylic acid. ABSO was blended with 1,6-hexanediol diacrylate (HDDA) and photoinitiator Irgacure 184 to investigate the effect of blend ratio on photocuring kinetics and coating performance. FTIR and 1H-NMR analyses confirmed successful acrylation of black seed oil. In situ FTIR monitoring revealed rapid photopolymerization, with acrylate conversion exceeding 90% within 1.2 s and nearing completion after 6 s under mercury lamp irradiation. The ABSO/HDDA ratio significantly influenced gel content, swelling behavior, and mechanical properties. Higher HDDA content increased crosslink density and surface hardness but reduced flexibility and adhesion, whereas ABSO-rich systems enhanced ductility and substrate compatibility due to their flexible triglyceride structure. The 60/40 ABSO/HDDA blend exhibited the best overall performance, combining high hardness (0.61), excellent adhesion (grade 0), strong impact resistance (119 kg·cm), good flexibility (3 mm), and full gloss after 6 s. Compared to EDMA-based systems, ABSO-based coatings demonstrated superior mechanical flexibility and interfacial performance while maintaining fast curing and surface durability. These findings underscore the potential of underutilized plant oils as reactive monomers for developing high-performance, environmentally friendly UV-curable coatings.