Surface Discoloration of Ultraviolet (UV)-Irradiated Phyllostachys bambusoides Bamboo

Q2 Engineering

Journal of the Korean wood science and technology Pub Date : 2023-05-01 DOI:10.5658/wood.2023.51.3.173

Hyoung-Woo Lee, Eun-Ju Lee, Y. Shin, H. Jo, Dae-Yeon Song

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引用次数: 0

Abstract

Color is an attribute of visual perception and can be an important factor that affects the preference of customers toward bamboo and wood products. Solar radiation can discolor bamboo surfaces and initiate cracking. The purpose of this study is to investigate the effects of an ultraviolet (UV)-protective coating on the photodiscoloration of untreated and heat-treated Phyllostachys bambusoides bamboo surfaces. Artificial UVA radiators are set at a UVA irradiance of 2,000 W/m 2 to accelerate the aging of the outer surfaces of hot-air-dried and heat-treated bamboo samples. Half of the samples are coated with transparent UV-protective paint. As the UVA radiation progresses, the discoloration prevention efficiency ( DPE ) of the UV-protective coating on all samples decreases gradually. The DPE s of the hot-air-dried samples are estimated to be 31.4% and 18.8% after 21 and 72 hours of artificial UVA radiation, respectively. The heat-treated samples exhibit similar trends (29.0% after 21 hours and 10.3% after 72 hours). Recoating the UV-protective paint periodically every six months is expected to minimize the discoloration of the bamboo’s outer surface.

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紫外光照射下毛竹表面变色的研究

颜色是视觉感知的一个属性，也是影响顾客对竹木产品偏好的一个重要因素。太阳辐射会使竹子表面变色并引发开裂。本研究的目的是研究紫外线防护涂层对未处理和热处理的竹表面光致变色的影响。人工UVA辐射器设置在2000W/m2的UVA辐照度下，以加速热空气干燥和热处理的竹子样品外表面的老化。一半的样品涂有透明的紫外线防护漆。随着UVA辐射的进行，所有样品上的紫外线保护涂层的防变色效率（DPE）逐渐降低。在人工UVA辐射21小时和72小时后，热空气干燥样品的DPE估计分别为31.4%和18.8%。热处理的样品表现出类似的趋势（21小时后为29.0%，72小时后为10.3%）。每隔六个月定期重新涂一次紫外线防护漆，以最大限度地减少竹子外表面的变色。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Korean wood science and technology Materials Science-Materials Science (miscellaneous)

CiteScore

5.20

自引率

0.00%

发文量

期刊介绍： The Journal of the Korean Wood Science and Technology (JKWST) launched in 1973 as an official publication of the Korean Society of Wood Science and Technology has been served as a core of knowledges on wood science and technology. The Journal acts as a medium for the exchange of research in the area of science and technology related to wood, and publishes results on the biology, chemistry, physics and technology of wood and wood-based products. Research results about applied sciences of wood-based materials are also welcome. The Journal is published bimonthly, and printing six issues per year. Supplemental or special issues are published occasionally. The abbreviated and official title of the journal is ''J. Korean Wood Sci. Technol.''. All submitted manuscripts written in Korean or English are peer-reviewed by more than two reviewers. The title, abstract, acknowledgement, references, and captions of figures and tables should be provided in English for all submitted manuscripts.

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