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Title
Improvement of bonding performance of lightweight panel composed of polystyrene foam core and poplar veneer with pine tannin and lignin
Authors
LU XIAONING YUE KONG CUI JUQING HAN SHUGUANG and DING XINGLONG
Published
Volume 46 Issue 7-8 September-October
Keywords
polystyrene foam, poplar, tannin, lignin, contact angle, bonding performance
Abstract
The study describes the improvement of the bonding performance of lightweight panels, faced with poplar veneer and
with a polystyrene foam core, treated with a solution of pine tannin and lignin. Contact angle values, measured with
water droplet as liquid, indicate that the wettability of the polystyrene foam soaked in pine tannin and lignin has been
remarkably reduced, from 87.5° to 28.5°. The bonding performance demonstrates that a higher concentration of pine
tannin and a lower concentration of lignin present a high failure ratio of the polystyrene foam. The concentration of
10% pine tannin and 5% lignin presented a failure ratio higher than 90%. The results provide a simple and effective
method to improve the adhesion between polystyrene foam and poplar veneer in the manufacture of lightweight panels.
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