Water adsorption on silica and calcium‐boroaluminosilicate glass surfaces—Thickness and hydrogen bonding of water layer

Abstract

Water readily adsorbs onto hydrophilic solid materials in humid environments and adsorbed water layers play a key role in interfacial properties such as adhesion, 1−5 wetting, 6 weathering, 7 mechanical strength, 8,9 and ion transport. 10 Water adsorbed on glass materials, for example, can induce corrosion of the glass surface, 11,12 affect the surface wear, 5,13−16 or influence the electrostatic charge transport phenomenon. 17,18 Fundamental understanding of water adsorption and desorption on multicomponent, low alkali containing glasses becomes specifically important for the flat panel display industry. These interfacial phenomena directly impact processing of flat panel displays due to the sensitivity of device fabrication steps to ambient humidity of manufacturing, storing, and transportation processes. However, the water adsorption isotherm behaviors on flat glass panels have not been sufficiently investigated due to the lack of experimental methods to measure the thickness and structure of adsorbed water layers on monolithic multicomponent glass surfaces in equilibrium with water vapor under ambient pressure. In the absence of adequate experimental data, researchers often rely on the water adsorption isotherm data measured for silicon oxide 19 to infer

Differences in indentation and wear behaviors between the two sides of thermally tempered soda lime silica glass

“…In humid conditions, water adsorbs on the glass surface 50 and those adsorbed water molecules are involved mechanochemical reactions 26,27 ; thus, the wear rate decreases significantly compared to the dry condition 19‐29 . The wear rates of both annealed and tempered glass surfaces in humid air (Figure 8C,D) are less than 5% of those in dry condition (Figure 8A,B).…”

Effect of humidity on friction, wear, and plastic deformation during nanoscratch of soda lime silica glass

“…When the ethanol vapor was used to lubricant SLS glass/Pyrex glass interface, a COF of ∼0.2 was obtained, along with ∼5 nm depth subsurface damage which was revealed through a hydrothermal treatment 26 . Thus, the COF of 0.12 in the E regime could be interpreted as the boundary lubrication effect of adsorbed (adventitious) molecules on the SLS glass surface 37 . Note that some subsurface damage in the silicate network may occur near the transition from E to P‐1, 38 but its contribution to friction might be negligible, so the topography of the outmost surface remains unchanged.…”

“…26 Thus, the COF of 0.12 in the E regime could be interpreted as the boundary lubrication effect of adsorbed (adventitious) molecules on the SLS glass surface. 37 Note that some subsurface damage in the silicate network may occur near the transition from E to P-1, 38 but its contribution to friction might be negligible, so the topography of the outmost surface remains unchanged.…”

Impact of aqueous solution pH on network structure of corrosion‐induced surface layers of boroaluminosilicate glass

“…The peak position of the OH stretching mode is a strong function of the strength of hydrogen bonding interactions 86–88 . To further explore hydrogen bonding interactions of hydrous species, the OH stretching bands of the k spectra were fitted with four components—the strongly hydrogen bonded component observed only in minerals (<3000 cm −1 ; gold in Figure 4), the component with hydrogen bonding strength similar to the ice‐like structure (3200∼3300 cm −1 ; brown), the one similar to the liquid‐like structure (3400‐3500 cm −1 ; cyan), and the weakly hydrogen bonded species (3550∼3600 cm −1 ; purple) 87,89,90 . The alteration layer formed in pH 7 (2312 days) appears to have a larger fraction of the strongly hydrogen bonded OH groups (<3000 cm −1 ) than the one formed in pH 9 (2312 days) and pH 9 (2312 days) → 3 (35 days).…”