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This study aims to develop an environmentally friendly adhesive for fiberboard preparing by utilizing oxidized tapioca starch (OS) and polymeric methylene diphenyl diisocyanate (pMDI) as partial replacements for urea formaldehyde (UF) adhesives. Tapioca starch was chemically modified through oxidation using hydrogen peroxide (H2O2) with CuSO4 catalyst, while pMDI was treated with sodium bisulfite (NaHSO3) to enhance compatibility with oxidized starch (OS). Fourier transform infrared (FTIR) analysis confirms the reactions occurring in these processes, including the successful incorporation ò aldehyde and carboxyl groups into the starch and the blocking of NCO groups in pMDI. Fiberboards produced with OS-based adhesives showed significantly lower formaldehyde emissions, with a 42% reduction achieved at an optimal OS/UF ratio of 30/70, while still meeting the physical and mechanical standards for MDF.D grade panels as per TCVN 7753:2007. The results demonstrate that oxidized tapioca starch, when combined with UF and B-pMDI can effectively reducing environmental impact while maintaining mechanical properties, showing a promising approach for sustainable adhesive solutions in the wood industry.

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Modified Tapioca Starch Based Adhesives for Fibreboard

  • 会议论文

  • 发表日期：

    2025年

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  • Nguyen Quy An,
  • Dao Quoc Hung,
  • Ngo Tuan Dung

摘要

This study aims to develop an environmentally friendly adhesive for fiberboard preparing by utilizing oxidized tapioca starch (OS) and polymeric methylene diphenyl diisocyanate (pMDI) as partial replacements for urea formaldehyde (UF) adhesives. Tapioca starch was chemically modified through oxidation using hydrogen peroxide (H2O2) with CuSO4 catalyst, while pMDI was treated with sodium bisulfite (NaHSO3) to enhance compatibility with oxidized starch (OS). Fourier transform infrared (FTIR) analysis confirms the reactions occurring in these processes, including the successful incorporation ò aldehyde and carboxyl groups into the starch and the blocking of NCO groups in pMDI. Fiberboards produced with OS-based adhesives showed significantly lower formaldehyde emissions, with a 42% reduction achieved at an optimal OS/UF ratio of 30/70, while still meeting the physical and mechanical standards for MDF.D grade panels as per TCVN 7753:2007. The results demonstrate that oxidized tapioca starch, when combined with UF and B-pMDI can effectively reducing environmental impact while maintaining mechanical properties, showing a promising approach for sustainable adhesive solutions in the wood industry.