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Overview of the Synthesis, Characterization, and Application of Tannin-Glyoxal Adhesive for Wood-Based Composites

Journal of Renewable Materials 2024年第7期12卷 1165-1186页

作者： awanda wira anggini Rita Kartika Sari Efri Mardawati Tati Karliati Apri Heri Iswanto Muhammad Adly Rahandi Lubis Research Center for Biomass and Bioproducts National Research and Innovation AgencyCibinong16911Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Department of Agro-Industrial Technology Universitas PadjadjaranBandung45363Indonesia Research Collaboration Center for Biomass and Biorefinery BRIN and Universitas PadjadjaranBandung45363Indonesia School of Life Sciences and Technology Institut Teknologi BandungBandung40132Indonesia Department of Forest Products Technology Faculty of ForestryUniversitas Sumatera UtaraMedan20355Indonesia

More than a century after its initial synthesis,urea-formaldehyde(UF)resins still have dominant applications as adhesives,paints,and ***,formaldehyde in this industry produces formaldehyde emissions that are dangerous to *** have spent the last decade replacing formaldehyde and phenol with environmentally friendly substances such as glyoxal and tannin to create bio-based *** review covers recent advances in synthesizing glyoxal tannin-based resins,especially those made from sustainable raw material substitutes and changes made to synthetic processes to improve mechanical *** efficacy of using tannin-glyoxal adhesives in producing wood-based composites has been *** glyoxylate reaction forms cross-linked bridges between the aromatic sites of the tannin and glyoxal molecular *** tannin adhesive with a greater percentage of glyoxal than tannin will produce an adhesive with better *** gel time reduces as the hardener concentration rises from 7.5%to 15%when glyoxal is used in ***,excessive amounts of glyoxal will result in a decrease in viscosity *** exhibits faster delivery degradation when it reaches a maximum temperature of approximately 130°C,although it initiates the curing process slightly slower at 110°*** glyoxal to tannin-based adhesives can improve the mechanical properties of composite *** wet shear strength of the resulting plywood is increased by 105.4%with the addition of 5-weight percent tannin-based resin with glyoxal as a cross-linker in Soy Protein *** glyoxal as a hardener,the panels produced showed good internal bond strengths(>0.35 MPa)and met the international standard specifications for interior-grade panels.

关键词： Bio-based adhesives glyoxal tannin wood adhesives wood-based composites

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