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<p>5-HMF is a most promising bio-waste component for the preparation of bio-based polymers. This study utilizes 5-HMF as a versatile and renewable material for the development of bio-based Polyurethane coating. Here presently in two step process first 5-HMF reacted with hydrazine, ethylene diamine and propylene diamine gives furan-based hydroxyl functioning products H-HyD, H-EDA and H-PDA a diol monomer unit containing imine functional group. In next step, hydroxyl functional groups of diol were combined with diisocyanate via the prepolymer method to create polyurethane composite. The Functional group transformations of prepared furan-based diols were characterized by FTIR, UV-Visible, <sup>1</sup>H-NMR, and LCMS spectroscopic analysis. Further the polymer material is subjected to the coating application on steel surface. Which has gloss values of coating panels between 69 and 81 at 60<sup>o</sup> angle. The mechanical strengths of coatings were tested and found to be good in agreement such as gloss, pencil hardness, flexibility, impact, and adhesion. The 7 days chemical resistivity test against the acid, alkali and salt solution was found to be good. The thermal stability by TGA shows 50% weight retention up to the 210<sup>o</sup> C temperature. DSC shows the two endothermic events for H-HT 126 and 264&#xa0;°C. While H-ET and H-PT showed endotherms at 144 and 158&#xa0;°C and exotherm at 212 and 228&#xa0;°C. Additionally polyurethane coating H-HT, H-ET and H-PT have contact angle of 76.2, 81.3 and 73.6&#xa0;°C indicated moderate hydrophobic nature.</p>

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Sustainable synthesis of furan-based diol from bio-waste derived 5-HMF for high-performance polyurethane coatings

  • 期刊论文

  • 发表日期：

    2026年4月26日

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  • Nikhil Borane,
  • Rahul Patil,
  • Lina Jadhav,
  • Dinesh Khairnar,
  • Vikas Patil

摘要

5-HMF is a most promising bio-waste component for the preparation of bio-based polymers. This study utilizes 5-HMF as a versatile and renewable material for the development of bio-based Polyurethane coating. Here presently in two step process first 5-HMF reacted with hydrazine, ethylene diamine and propylene diamine gives furan-based hydroxyl functioning products H-HyD, H-EDA and H-PDA a diol monomer unit containing imine functional group. In next step, hydroxyl functional groups of diol were combined with diisocyanate via the prepolymer method to create polyurethane composite. The Functional group transformations of prepared furan-based diols were characterized by FTIR, UV-Visible, 1H-NMR, and LCMS spectroscopic analysis. Further the polymer material is subjected to the coating application on steel surface. Which has gloss values of coating panels between 69 and 81 at 60o angle. The mechanical strengths of coatings were tested and found to be good in agreement such as gloss, pencil hardness, flexibility, impact, and adhesion. The 7 days chemical resistivity test against the acid, alkali and salt solution was found to be good. The thermal stability by TGA shows 50% weight retention up to the 210o C temperature. DSC shows the two endothermic events for H-HT 126 and 264 °C. While H-ET and H-PT showed endotherms at 144 and 158 °C and exotherm at 212 and 228 °C. Additionally polyurethane coating H-HT, H-ET and H-PT have contact angle of 76.2, 81.3 and 73.6 °C indicated moderate hydrophobic nature.