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http://dx.doi.org/10.12654/JCS.2016.32.4.05

Study of UV Degradation of Lacquer and Natural Adhesives Using Lacquer Mixed with Animal Glue  

Ahn, Sunah (Restoration Technology Division, National Research Institute of Cultural Heritage)
Kim, Eun Kyung (Restoration Technology Division, National Research Institute of Cultural Heritage)
Jang, Sungyoon (Restoration Technology Division, National Research Institute of Cultural Heritage)
Publication Information
Journal of Conservation Science / v.32, no.4, 2016 , pp. 501-510 More about this Journal
Abstract
In this study, we investigated the degradation of adhesives when exposed to ultraviolet light irradiation using samples of lacquer (L), treated lacquer (TL), lacquer mixed with glue (LG), and urushiol mixed with glue (UG). Four types of film specimens were collected under the ultraviolet exposure time, and gloss test, tensile shear strength test, scanning electron microscope analysis, and infrared spectroscopic analysis were conducted for the specimens. LG and UG showed lowering rate of gloss is somewhat later than L. Also, it was observed that with increasing exposure time to ultraviolet irradiation, the surface of L began to show spherical pits and cracks when the polysaccharide layers started to be exposed, whereas the surfaces of LG and UG remained smooth. The Infrared spectra of L and TL showed that the intensity of the overall peak decreased with increasing ultraviolet irradiation time. There was no change in the peak intensity of LG, but for UG, the peaks at $3013cm^{-1}$, $1593cm^{-1}$ and so on disappeared and the overall intensity declined. The tensile shear strength of LG and UG was maintained or increased as compared to the initial test, whereas the tensile shear strength of L decreased sharply after 600 h. LG and UG exhibited fewer changes as a result of high temperature and humidity conditions, and they retained their strength under UV exposure. These results indicate that LG and UG are more durable than L when subjected to environmental change.
Keywords
Lacquer; Animal glue; Natural adhesives; UV light; Degradation;
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Times Cited By KSCI : 4  (Citation Analysis)
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