Mechanisms for the surface colour protection of bamboo treated with chromated phosphate
Journal
Polymer Degradation and Stability
Journal Volume
74
Journal Issue
3
Pages
551-557
Date Issued
2001
Author(s)
Abstract
The attractive green appearance of bamboo culm discolours easily without any protective treatment. Chromated phosphate (CP) was used successfully to protect the green surface of bamboo. To further understand the mechanisms of this protective treatment, three model compounds including cellobiose, arabinose and guaiacol, in place of the chemical components of bamboo, were used to react with CP. FTIR with liquid attenuated total reflectance accessory (liquid ATR) was conducted to investigate the reaction between the model compounds and CP. The results revealed that guaiacol had the greatest reactivity toward CP, followed by arabinose and cellobiose. Green precipitates were formed in the solution, as reaction time increased. This green complex was similar to a green pigment, chromic phosphate (CrPO4), in chemical structure. This green complex contributed to the green-colour protection of bamboo treated with CP by precipitation and chemical bonding to its epidermis. © 2001 Elsevier Science Ltd. All rights reserved.
Type
journal article