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Natural dye extracted from Dalbergia cochinchinensis residue with water fastness, mildew resistance and permeability properties for wood staining

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Abstract

Natural dyes (ND) are gaining increasing interest due to their outstanding merits of being eco-friendly, biodegradable and non-toxic. Wood dyed with extracts from Dalbergia cochinchinensis residues as ND exhibited desirable color appearance and anti-UV property, while the other potential properties of ND dyed wood in terms of water fastness, mildew resistance along with the penetrability of the ND on wood blocks dyeing have not yet been exploited. The present study was aimed at exploring these aspects for multifunction assessment of the ND dyed wood. The results showed that the total color difference (ΔE*: 4.58) and color intensity reduction (PR: 14.01%) of the ND dyed wood declined slightly after washing fastness test in comparison with that of acid red (ΔE*: 32.82; RP: 76.14%) and reactive red (ΔE*: 26.85; RP: 66.52%) dyed wood, which is indicative of its preferable water fastness, which can be ascribed to the hydrophobicity improvement of the wood surface after ND dyeing. In addition, the ND ameliorated the mildew resistance against Aspergillus niger and Trichoderma viride infection. Interestingly, the wood blocks can be completely impregnated with ND under atmospheric pressure dyeing process without any pretreatment and auxiliary. This study provided a promising approach for multifunctional ND dyed wood preparation.

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Abbreviations

AGR:

Acid red GR

AE:

Anhydrous ethanol

AIV:

Average infection value

I :

Color intensity

CA:

Contact angles

DPR:

Dyeing penetration rate

MCE:

Mold control effectiveness

ND:

Natural dye

R3G:

Reactive red 3G

RP:

Reduction percentage

SEM:

Scanning electron microscopy

ΔE * :

Total color difference

UV:

Ultraviolet

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Acknowledgements

Financial support of the present work was provided by Research Fund of Fujian Provincial Finance Department (NO. K8115004A) and Science and Technology Innovation of Fujian Agriculture and Forestry University (NO. KF2015008).

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Correspondence to Jian Li or **guo Lin.

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Zhu, T., Ren, K., Sheng, J. et al. Natural dye extracted from Dalbergia cochinchinensis residue with water fastness, mildew resistance and permeability properties for wood staining. Wood Sci Technol 56, 969–988 (2022). https://doi.org/10.1007/s00226-022-01385-y

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  • DOI: https://doi.org/10.1007/s00226-022-01385-y

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