The Study of POSS/Polyurethane as a Consolidant for Fragile Cultural Objects
Source abstract
Abstract
Moisture-curable polyurethane (MCPU) is a specifically designed material for the consolidation of fragile cultural objects in high-humidity environments. In order to solve the problem of its susceptibility to yellowing due to heat ageing, polyhedral oligomeric silsesquioxane (POSS) was added to the MCPU to prepare POSS/MCPU. The appearance, stability and mechanical properties of the POSS/MCPU films were characterized using a UV–Vis spectrophotometer, a gloss meter, a colorimeter, a thermal analyzer and a universal material testing machine. The results showed that the films are colorless and transparent and have a light transmission of over 80%. The addition of POSS has almost no effect on the chromaticity of the MCPU, while the thermal stability of the POSS/MCPU is improved compared to the pristine MCPU. The modified film is 2.50 times more resistant to yellowing by heat. The addition of POSS also simultaneously enhances the strength and toughness of the film. Using POSS/MCPU to reinforce the fragile object, the material was found to be significantly effective, indicating it has the potential to be used during the extraction of fragile cultural objects from archaeological sites.
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Research context
OpenAlex topics: Silicone and Siloxane Chemistry · Building materials and conservation · Marine Biology and Environmental Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Cultural Heritage Research and Conservation, Northwest University, Ministry of Education, Xi’an 710127, China
School of Cultural Heritage, Northwest University, Xi’an 710127, China
School of History and Society, Chongqing Normal University, Chongqing 401331, China
Xi’an Cultural Heritage Promotion Centre, Xi’an 710001, China
Funding
Liqin Wang · Xing Zhao
References (28)
Show source-provided references
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