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<p>Polyurethane (PU) is also associated with the presence of good thermophysical characteristics and the addition of graphene oxide (GO), which is a nanomaterial with remarkable mechanical strength and electrical conductivity, to polyurethane significantly contributed to the improvement of the working capabilities of composites in the form of polyurethane-based composites. The incompatibility between GO and the PU matrix was overcome by silane functionalization of the graphene oxide with 3-glycidyloxypropyl-trimethoxysilane (GPTMS), which enhanced the dispersion of the graphene-based material throughout the polymeric matrix and increased adhesion at the interface. In this study, functionalized GO was prepared by using the silanization of GO with 3-glycidyloxypropyl-trimethoxysilane. Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and X-ray diffraction characterized the silane-functionalized graphene oxide (GGO). Next, it was introduced in castor oil-based PU (COPU) prepolymer fabricated using castor oil, 1,4-butanediol and isophorone diisocyanate. The GGO-COPU resulting nanocomposites were thoroughly characterized using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Raman spectroscopy to elucidate the relationship between structural modifications and enhanced thermal and material properties, providing valuable insights for the design of next-generation, eco-friendly PU-based materials for technological applications.</p>

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Synthesis and characterization of silane-functionalized graphene oxide in castor oil-based polyurethane for enhanced physico-mechanical properties

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Lekharaj C Mahajan,
  • Namita Karna,
  • Debashis Kundu

摘要

Polyurethane (PU) is also associated with the presence of good thermophysical characteristics and the addition of graphene oxide (GO), which is a nanomaterial with remarkable mechanical strength and electrical conductivity, to polyurethane significantly contributed to the improvement of the working capabilities of composites in the form of polyurethane-based composites. The incompatibility between GO and the PU matrix was overcome by silane functionalization of the graphene oxide with 3-glycidyloxypropyl-trimethoxysilane (GPTMS), which enhanced the dispersion of the graphene-based material throughout the polymeric matrix and increased adhesion at the interface. In this study, functionalized GO was prepared by using the silanization of GO with 3-glycidyloxypropyl-trimethoxysilane. Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and X-ray diffraction characterized the silane-functionalized graphene oxide (GGO). Next, it was introduced in castor oil-based PU (COPU) prepolymer fabricated using castor oil, 1,4-butanediol and isophorone diisocyanate. The GGO-COPU resulting nanocomposites were thoroughly characterized using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Raman spectroscopy to elucidate the relationship between structural modifications and enhanced thermal and material properties, providing valuable insights for the design of next-generation, eco-friendly PU-based materials for technological applications.