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Environmentally benign methods for producing green culms of ma bamboo (Dendrocalamus latiflorus) and moso bamboo (Phyllostachys pubescens)

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Abstract

The objective of this study was to find an effective method for treating ma bamboo (Dendrocalamus latiflorus) and moso bamboo (Phyllostachys pubescens) using new water-based reagents containing copper. The effects of green-color protection using various treatments on bamboo culms were examined in this study. Two methods were used: heating in a water bath and ultrasonic dipping. The results revealed that excellent green-color protection (a* value of −6.2) was obtained when ma bamboo culms were treated with 0.25% ammoniacal copper quaternary compound-type B (ACQ-B) in a water bath at 100°C for 2 h. It was also found that the wettability of bamboo epidermis increasedsignificantly after pretreatment in a mixture of 1% KOH and surfactant in a water bath at 100°C for 30 min. Furthermore, pretreated moso bamboo culms exhibited excellent green-color protection after they were treated with 0.25% ACQ-B at 100°C for 2 h (a* value of −8.2). This novel treatment method definitely endows the bamboo culms with a fascinating green skin color and consequently could increase the economic value of bamboo products. No improvement in green-color protection was found when ultrasonic energy was added to the water bath at ambient temperature.

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Correspondence to Shang-Tzen Chang.

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Chung, M., Cheng, S. & Chang, S. Environmentally benign methods for producing green culms of ma bamboo (Dendrocalamus latiflorus) and moso bamboo (Phyllostachys pubescens). J Wood Sci 55, 197–202 (2009) doi:10.1007/s10086-008-1014-0

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Key words

  • Green-color protection
  • Bamboo
  • Dendrocalamus latiflorus
  • Phyllostachys pubescens
  • ACQ-B