Simultaneous determination of the spectroscopic and adsorption isotherms of water on silica

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TypeArticle
Journal titleMateriaux et constructions. Materials and Structures
ISSN0025-5432
Issue28
Pages199207; # of pages: 9
Subjectspectroscopy; adsorption; silica glass; vapor pressure; building materials; Concrete
AbstractThe changes in the near infrared spectra of the porous 96% silica glass-water system were determined, simultaneously with the vapour pressure and the adsorbate concentration, during a complete adsorption cycle. The heating effect of the analyzing undispersed infrared beam was eliminated. From the absorbance vs concentration plots it is inferred that the "free" silanol groups are the main adsorption centres and the ratio of H[2]O to OH is 1:1 in the monolayer. The results indicate that the Corning 7,930 porous silica has micropores and a portion of the adsorbed water exists in an unperturbed state over the entire concentration region.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-528
NRC number12713
2654
NPARC number20374883
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Record identifier838befdd-cfe0-4e99-ba50-b857926014d5
Record created2012-07-23
Record modified2016-05-09
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