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Biomass Chemical Engineering ›› 2024, Vol. 58 ›› Issue (1): 56-66.doi: 10.3969/j.issn.1673-5854.2024.01.008

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Progress of Wood Adhesives from Lignin and Lignin-derived Compounds

Meiyu HUO1,2, Guifeng LIU1,*(), Shuping HUO1, Zhenwu KONG1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2023-02-16 Online:2024-01-30 Published:2024-01-24
  • Contact: Guifeng LIU E-mail:liuguifeng067@163.com

Abstract:

The development of eco-friendly and excellent wood adhesive from sustainable and renewable resources instead of traditional fossil resources had attracted considerable attention in the wood-based panel industry. Lignin had a wide range of sources and low prices, and its molecular structure contained active groups, such as hydroxyl, methoxyl and carboxyl groups, which were easy to be functionalized and modified, and it was an ideal raw material for making wood adhesive. In this paper, the applications and research status of lignin and its derivatives in wood adhesives of phenolic resins, urea-formaldehyde resins, epoxy resins and polyurethanes and other synthetic resins were reviewed. Furthermore, the effects of pretreatment methods such as chemical modification, depolymerization and solvent fraction on the chemical reactivity of lignin and the mechanical properties of synthetic resin adhesives were discussed. The problems and challenges of lignin-based wood adhesives existed in the current development of were investigated, and the future application and research directions were prospected, in order to provide theoretical and technical references for the efficient and high-value added utilization of lignin resources and the development of high-performance bio-based wood adhesives.

Key words: lignin, derivative, synthetic resin, wood adhesive, wood-based panel

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