Evaluation of UV-permeability and photo-oxidisability of organic ultraviolet radiation-absorbing coatings

•We investigate organic UV radiation-absorbing coatings for use on bamboo surfaces.•The size of glass exactly inserted into sample cell of UV-Vis spectrophotometer.•A model was made to predict UV absorption of coatings.•We examine carbonyl groups change of coatings after ageing.•Two formulations whi...

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Bibliographic Details
Published in:Applied surface science 2015-03, Vol.332, p.186-191
Main Authors: Li, Neng, Chen, Yuhe, Bao, Yongjie, Zhang, Zeqian, Wu, Zaixing, Chen, Zhangmin
Format: Article
Language:English
Subjects:
Bamboo
Coating
Coatings
Fourier transforms
Infrared spectroscopy
Outdoor
Photodegradation
Photooxidation
Spectroscopic analysis
Ultraviolet radiation
Ultraviolet radiation absorber
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Summary:•We investigate organic UV radiation-absorbing coatings for use on bamboo surfaces.•The size of glass exactly inserted into sample cell of UV-Vis spectrophotometer.•A model was made to predict UV absorption of coatings.•We examine carbonyl groups change of coatings after ageing.•Two formulations which could effectively protect coating were obtained. Enhancing the durability of the coatings used on bamboo products is essential for increasing their use in outdoor environments. In this study, we investigated organic UV radiation-absorbing coatings for use on bamboo surfaces. The degree of resistance of the coatings, which contained 2-(2-hydroxy-3-tert-butyl-5-methyl-phenyl)-5-chlorinated benzotriazole (BTZ-1), to UV radiation degradation was determined through spectroscopic analysis. The critical BTZ-1 loading amount was determined by analysing the spectroscopic data. Fourier transform infrared spectroscopy was used to elucidate the relationship between the degree of photooxidation of the coatings and their BTZ-1 concentration. The experimental results showed that the coatings provided a high degree of shielding from UV radiation. The critical loading amount was determined to be 1.82±0.05g BTZ-1/m2. The coatings formed using the formulations that contained 3 and 5wt% BTZ-1 exhibited the lowest degree of photooxidation after exposure to UV radiation.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2015.01.112