In situ study on interactions between hydroxyl groups in kaolinite and re-adsorption water

Abstract

Because two layers slipped away from each other, inner-surface O–H was transformed into outer O–H during heating from 100–300 °C. Re-adsorption water could be thoroughly removed at 650 °C.

Synthesis and characterization of silica gel from Lapindo volcanic mud with ethanol as a cosolvent for desiccant applications

“…32 From that, the synthesized silica gel (5 : 5) shows the highest adsorption performance than others, indicating that the silica gel (5 : 5) has a high number of OH groups that can interact with water molecules via the hydrogen bridge. 33 This result is in agreement with the conventional gravimetric adsorption test. However, the adsorption ability of the silica gel (5 : 5) using TGA analysis is higher than that using the conventional gravimetric process, indicating that TGA analysis is suitable for the determination of adsorbed water molecule on silica gel.…”

The Effect of Clay Content on the Dilatancy and Frictional Properties of Fault Gouge

“…Negative b values therefore lend weight to the argument that the frictional aging of grain contacts, through processes such as chemical bonding, controls the friction evolution effect in clay‐rich gouges (Li et al., 2011). Mineral surfaces of phyllosilicates commonly have a high surface charge, and so can produce grain contacts with variations in strength dependent on the presence or absence of absorbed water (Han et al., 2020).…”

“…By increasing the pore fluid pressure, ( a‐b ) also increased—at pore fluid pressures above 25 MPa, changes in σ n eff had little effect on ( a‐b ) (Bedford et al., 2021). The change in phyllosilicate behavior between dry and wet conditions, which is significant in kaolinite, lizardite and chlorite, has been well documented and may account for the opposing trends in the literature (Bedford et al., 2021; Behnsen & Faulkner, 2012; Han et al., 2020; Moore & Lockner, 2004; Saffer & Marone, 2003).…”

An atomistic scale simulation study of structural properties in the silk–fibrohexamerin complex

“…This phenomenon is attributed to the presence of too many hydroxyl groups. 49 The interaction of water molecules with the Man7 N -glycan P25 protein was excellent; therefore, the interaction with the protein could be reduced. The interaction of water molecules with the Man7 N -glycan P25 protein was superb, so the interaction to protein could be decreased.…”