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Preparation of Nano-SiO2/Waterborne Polyurethane Complex Coating and Its Application in Simulated Paper Relics Protection
Received:August 02, 2022  
DOI：10.11980/j.issn.0254-508X.2023.01.008
Key Words:nano-SiO2  waterborne polyurethane  UV aging resistance  strengthening  hand-made xuan paper
Author NameAffiliationPostcode
XIA Man* College of Textile Science and Engineering （International Institute of Silk）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 310018
LI Haohao College of Textile Science and Engineering （International Institute of Silk）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 310018
ZHANG Liyuan College of Textile Science and Engineering （International Institute of Silk）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 310018
ZHANG Xiumei College of Textile Science and Engineering （International Institute of Silk）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 310018
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Abstract:In this study， a complex coating used in paper relics protection was prepared by modified waterborne polyurethane with nano-SiO2 via in-situ polymerization. The surface appearance and mechanical properties of hand-made xuan paper before and after coating were studied， and the application performance of the coating to the simulated paper relics was characterized. The results showed that the nano-SiO2 with photocatalyst function introduced into the waterborne polyurethane was good dispersed with nano particle size. Moreover， the coating absorbed about 80% of the UV in the whole UV band， indicating a certain UV shielding effect. When the nano-SiO2 content was 0.5%， compared with control xuan paper， the tear strength of xuan paper increased 204.9% and the tensile index increased 282.7%， and with a good UV aging resistance.
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