A research team from Fujian Agriculture and Forestry University recently published their research results in the journal Nature, demonstrating how to use green and low-carbon biomass such as wood and straw to prepare low-cost, high-performance and non-toxic bio-based wood adhesives. The study found that lignin, as the main component of plants, can bind cellulose and hemicellulose together and act as a natural polymer "glue". Under high temperature and acidic (or alkaline) catalysts, lignin undergoes condensation and cross-linking reactions to form C-C bonds that connect the units together. The researchers inferred that uncondensed or less condensed lignin can be used directly as a wood adhesive, undergoing cross-linking reactions under hot pressing conditions to act as an adhesive. They separated various forms of lignin from biomass through different extraction methods and mixed them with water to make simple lignin adhesives. This innovation provides new possibilities for the application of green and low-carbon materials.

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