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Updated: Jul 18, 2026
Preparation and Testing of Plant Seed Meal-based Wood Adhesives
Published on: March 5, 2015
A study on the preparation of high-strength starch-based adhesives with multiple cross-linked structures based on
Qingli Sun1, Jiajin Jiang1, Kang Chen1
1State Key Laboratory of Woody Oil Resources Utilization, Northeast Forestry University, Harbin, 150040, China; Engineering Research Center of Advanced Wooden Materials, Northeast Forestry University, Ministry of Education, Harbin, 150040, China.
This study developed a novel starch-based adhesive (OSPE) using diacetyl starch, polyethyleneimine, and epichlorohydrin. The enhanced adhesive exhibits superior dry and wet shear strength, improved water resistance, and excellent mold resistance for sustainable applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Sustainable Chemistry
Background:
- Starch-based adhesives offer sustainable, formaldehyde-free alternatives but suffer from poor water resistance, low strength, and mold susceptibility.
- Limitations hinder the widespread industrial application of conventional starch adhesives.
Purpose of the Study:
- To enhance the performance of starch-based adhesives by improving water resistance, bonding strength, and mold resistance.
- To develop a multi-crosslinked starch-based adhesive (OSPE) using diacetyl starch, polyethyleneimine, and epichlorohydrin.
Main Methods:
- Modified diacetyl starch (DS) through reactions with polyethyleneimine (PEI) involving Schiff base and hydrogen bond cross-linking.
- Introduced epichlorohydrin (ECH) for substitution cross-linking to create a multi-crosslinked network structure in the OSPE adhesive.
- Evaluated the performance of the OSPE adhesive bonded plywood for dry/wet shear strength and hydrophobicity.
Main Results:
- The OSPE adhesive achieved a dry shear strength of 2.26 MPa and a wet shear strength of 1.30 MPa, significantly exceeding GB/T 9846-2015 standards.
- Demonstrated a 10.24% increase in dry shear strength and a 348.28% increase in wet shear strength compared to pure DS adhesive.
- The adhesive film exhibited hydrophobicity with a contact angle of 94° and maintained excellent mold resistance over 14 days.
Conclusions:
- The developed OSPE adhesive, with its multi-crosslinked network, effectively overcomes the limitations of traditional starch-based adhesives.
- This research presents a viable strategy for producing high-performance, water-resistant, and mold-resistant starch-based adhesives for industrial use.
- The findings support the use of modified starch adhesives as a sustainable and high-performance alternative in various bonding applications.
