Research advances in bio-based adhesives

Adhesives play a crucial role in connecting various materials through interface adhesion and cohesion. They find wide applications in industries, such as wood processing, furniture, construction, aerospace, automotive, ship building, electronics, and electrical appliances. Traditionally, adhesives have been synthesized using petroleum-based resources. However, the use of petroleum-based adhesives often leads to the release of harmful substances, such as volatile organic compounds, benzene, toluene, xylene, and formaldehyde, causing remarkable environmental pollution and posing risks to human health. Bio-based adhesives have emerged as a prominent area of research in recent decades due to these reasons. This article provides an overview of the latest advancements in the study of bio-based adhesives, including their research progress, development, and applications. The review encompasses various types of bio-based adhesives, such as protein-based adhesives, lignin-based adhesives, starch-based adhesives, tannin-based adhesives, and other bio-based adhesives. The article outlines the development trends and future research directions in the field of bio-based adhesives.