@article {141,
	title = {Preservation of York Minster historic limestone by hydrophobic surface coatings.},
	journal = {Scientific Reports},
	volume = {2},
	year = {2012},
	note = {CAPLUS AN 2013:60154(Journal; Online Computer File)},
	month = {2012///},
	pages = {srep00880, 5 pp.},
	publisher = {Nature Publishing Group},
	abstract = {Magnesian limestone is a key construction component of many historic buildings that is under const. attack from environmental pollutants notably by oxides of sulfur via acid rain, particulate matter sulfate and gaseous SO2 emissions.  Hydrophobic surface coatings offer a potential route to protect existing stonework in cultural heritage sites, however, many available coatings act by blocking the stone microstructure, preventing it from {\textquoteright}breathing{\textquoteright} and promoting mold growth and salt efflorescence.  Here we report on a conformal surface modification method using self-assembled monolayers of naturally sourced free fatty acids combined with sub-monolayer fluorinated alkyl silanes to generate hydrophobic (HP) and super hydrophobic (SHP) coatings on calcite.  We demonstrate the efficacy of these HP and SHP surface coatings for increasing limestone resistance to sulfation and thus retarding gypsum formation under SO2/H2O and model acid rain environments.  SHP treatment of 19th century stone from York Minster suppresses sulfuric acid permeation. [on SciFinder(R)]},
	keywords = {archaeol limestone preservation surface coating},
	isbn = {2045-2322},
	author = {Walker, Rachel A. and Wilson, Karen and Lee, Adam F. and Woodford, Julia and Grassian, Vicki H. and Baltrusaitis, Jonas and Rubasinghege, Gayan and Cibin, Giannantonio and Dent, Andrew.}
}
