Improvements and limitation of soy protein-based adhesive: A review

Soy protein is known for its eco-friendly, sustainable, and biodegradable qualities that are likely used as raw material in producing bioadhesive. However, soy protein-based adhesive are lacking in terms of adhesive strength and water-resistance compared to commercial formaldehyde-based adhesives such as phenol and urea-formaldehyde resin. Therefore, continuous research has been done to improve adhesive performance. This can be done via physical or modification methods, including the usage of cross-linking agents, structural modification, enzymatic modification, and the addition of additives. This review will cover these modification methods that give significant enhancement to the water-resistance and adhesive strength of soy protein-based adhesives.

Automated summary

Soy protein is a promising raw material for bioadhesive due to its eco-friendly and biodegradable qualities, but it still lacks adhesive strength and water-resistance compared to formaldehyde-based adhesives. Continuous research on modification methods, including the use of cross-linking agents and structural modification, has been conducted to enhance the performance of soy protein-based adhesives.