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Preparation and Testing of Plant Seed Meal-based Wood Adhesives
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A Tough and Mildew-Proof Soybean-Based Adhesive Inspired by Mussel and Algae
Yue Bai1,2,3, Xiaorong Liu1,2,3, Sheldon Q Shi2,4
1Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China.
Polymers
|April 5, 2020
Summary
This study presents a new, eco-friendly bio-adhesive made from soybean and blood meal. The novel protein-based adhesive demonstrates strong adhesion and mold resistance in wet conditions, utilizing metal coordination for enhanced durability.
Area of Science:
- Materials Science
- Biochemistry
- Sustainable Chemistry
Background:
- Protein-based adhesives face challenges in achieving robust adhesion and mold resistance, particularly in wet environments.
- Existing bio-adhesives often struggle to balance performance with environmental sustainability.
- There is a need for innovative adhesive solutions derived from renewable resources.
Purpose of the Study:
- To develop a facile fabrication technology for a tough, eco-friendly bio-adhesive using soybean meal and blood meal.
- To enhance adhesive properties through metal coordination inspired by marine organisms.
- To create a value-added application for protein co-products.
Main Methods:
- Incorporation of soybean meal and alkali-modified blood meal (mBM).
- Introduction of 1,6-hexane dioldiglycidyl ether (HDE) for preliminary cross-linking.
- Utilizing zinc ions for metal coordination to strengthen the protein network.
- Employing calcium ions for gelation and network compaction.
Main Results:
- The developed bio-adhesive exhibits excellent thermal stability, water resistance (1.1 MPa wet shear strength), and mold resistance.
- Achieved appropriate solid content (34.3%) and low moisture uptake (11.9%).
- Demonstrated a multi-stage cross-linking mechanism involving HDE, zinc, and calcium ions.
Conclusions:
- The novel protein-based adhesive offers a sustainable and high-performance alternative to conventional adhesives.
- Metal coordination is an effective strategy for enhancing the toughness and durability of bio-adhesives.
- This research promotes the value-added utilization of agricultural protein co-products.
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