Related Experiment Video
Updated: May 6, 2026
11:26
Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
Published on: June 17, 2014
15.9K
Lignin Colloids-Induced Interfacial Films Stabilize Water-In-Oil Isocyanate Emulsion Adhesives for Robust Wood
Xinhao Zhang1, Ke Jiang2, Dongbin Fan1
1Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China.
ACS Nano
|May 5, 2026
Summary
Researchers developed a novel wood adhesive using lignin colloids in a water-in-oil emulsion. This strategy controls isocyanate reactions, significantly improving bondline quality, strength, and durability while reducing isocyanate usage.
Area of Science:
- Materials Science
- Polymer Chemistry
- Wood Composites
Background:
- Excessive isocyanate penetration into wood causes bondline defects in W/O emulsion adhesives.
- Controlling interfacial reactions is crucial for adhesive performance and durability.
Purpose of the Study:
- To design a W/O emulsion adhesive system that mitigates isocyanate overpenetration and controls interfacial reactivity.
- To enhance wood adhesive performance and durability using lignin colloids.
Main Methods:
- Lignin colloids were designed as multifunctional regulators in W/O emulsions.
- A cooperative strategy coupled bulk rheological regulation with interfacial film engineering.
- The interfacial film formation and its effect on isocyanate-water reactions were investigated.
Main Results:
- Lignin colloids increased viscosity, suppressed isocyanate penetration (200 to 25 μm), and formed an interfacial film.
- Pot life extended 1.5-2-fold, retaining 80% of isocyanate (NCO).
- Dry shear strength increased to 1.74 MPa, with 93% strength retention after boiling water treatment.
Conclusions:
- Lignin colloids effectively regulate interfacial reactions and improve wood adhesive performance.
- The strategy offers enhanced bonding, durability, and reduced isocyanate input for wood adhesives.
- This approach shows potential for developing sustainable and efficient wood adhesive systems.
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