Authors: Yurong Liu Jia Liu
Publish Date: 2016/07/16
Volume: 122, Issue: 8, Pages: 743-
Abstract
The present work was aimed to develop a new kind of stone conservation materials TEOS/PDMS/F127 hybrid coating by a facile sol–gel method for the protection of decayed sandstones of Chongqing Dazu stone sculptures in China The hydrophobic property surface morphology water vapor permeability ultraviolet aging resistance and mechanical properties were measured to evaluate the effectiveness of TEOS/PDMS/F127 hybrid coating as a stone conservation material The results showed that the addition of hydroxylterminated polydimethylsiloxane PDMSOH contributed to improve the hydrophobic properties and incorporation of PEO–PPO–PEO F127 surfactant resulted in the formation of superficial protrusions with micro and nanoscopic structures and overall alteration of surface morphology and roughness thus preventing the coating materials from cracking After treatment with TEOS/PDMS/F127 hybrid coating materials the ultraviolet aging resistance and mechanical properties of stone were also improved without the obvious effects on the breathability and color of the stone indicating promising applications of TEOS/PDMS/F127 hybrid coating materials for conservation of historic stone sculpturesThe authors gratefully acknowledge the financial supports from Basic and Frontier Research Program of Chongqing Municipality cstc2016jcyjA1785 the Major Research Training Program of Chongqing University of Arts and Sciences 201448 and the First Excellent Young Teachers Program of Chongqing high school 201165
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