Structural design and rapid curing by sunlight of novel melamine resin applied for functional optical coating

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-03-12 DOI:10.1016/j.porgcoat.2025.109223

Lijiu Cao , Shuai Wang , Yunpeng Gong , Yue Hu , Xu Ma , Jian Huang , Yufang Chen

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引用次数: 0

Abstract

Due to the excellent properties like high transmittance, excellent stain-resistance, self-cleaning, solvent-resistance, scratch-resistance and coating toughness, the novel functional optical coatings exhibit great value in the surface protection application scenarios such as solar panels, glass screens, high-speed vehicles, cultural relics protection and so on. In this study, a novel melamine resin oligomer (AMFO) with trifunctional groups (-CH₂-OH, -CH=CH₂ and -O-C(CH₂)₂-CO-C₆H₅) was designed and synthesized with amidated melamine (AM) as raw material. Then the composite coating solution of AMFO,1,1,1-trimethylpropenyl-triacrylate (TMPTA) and methacrylic acid (MA) was prepared and cured quickly under sunlight to become a functional optical coating– melamine resin coating (AMFC). The results showed that the mixed coating solution composed of 1 parts TMPTA and 20 parts MA and 100 parts AMFO could be completely cured under sunlight for 30 min. The prepared AMFC exhibited a transmittance of 98.2 %, a refractive index of 1.5589, a water contact angle of 102°, a tensile strength of 8.92 MPa, an impact resistance of 110 mm, a pencil hardness of 5H, an adhesion strength of 9.09 MPa, and a combustion grade B. The AMFC demonstrated outstanding light transmittance, self-hydrophobicity, structural toughness and inherent flame retardancy, as well as antifouling, self-cleaning and chemical corrosion resistance. The inner reason is that the free radical polymerization of -CH=CH₂ induced by -O-C(CH₂)₂-CO-C₆H₅ in AMFO structure, the polycondensation of -CH₂-OH promoted by acid, and the cross-linking reaction have efficient synergistic effects. The polymerization of various active groups promoted the formation of the integrated in situ interpenetrating network (IPN) structure of AMFC. This work establishes a key foundation for melamine-formaldehyde resin (MF) applying in functional optical coating technology.

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.