Role of Solvent on the Silanization of Glass with Octadecyltrichlorosilane

Accurate method for determining adhesion of cantilever beams

“…Although a drying front of water moving across the surface was observed in one video frame and had disappeared in the next (30 msec later) due to its rapid velocity over the hydrophobic surface, water remained microscopically in the vicinity of the beams for approximately another second, and clearly pulled the beams further in. ODTS density on the substrate surface is known to be a strong function of deposition conditions [36]. We hypothesize that because the ODTS film did not attain maximum density in our deposition, the adhesioncontrolling receding contact angle was less than 90".…”

Development and characterization of polymer-grafted ceramic membranes for solvent nanofiltration

“…It is shown that crosslinking these systems results in an increase in thermal and chemical stability and prevents the polymer from excessive swelling [57,58,[83][84][85][86]. A PI membrane can be cross-linked by radical initiation, through thermal treatments, by UV irradiation [84,87] or by chemical crosslinking [57,58,[88][89][90][91]. For SRNF, radical initiation is not suitable, because crosslinking cannot be throughout the whole membrane.…”

“…In this case the maximum chain surface density is largely controlled by the initial surface concentration of the vinyl groups, which also affects the yield and distribution of grafted polymer chains on the support surface [10,88]. Coverage by multilayer silylation can be achieved using a di-or trifunctional silylating agents in either aqueous or anhydrous (i.e., organic solvent) solvents, while the choice of the solvent largely affects the resulting silylation coverage [89][90][91][92]. Specifically, in an aqueous environment the chloro and alkoxy groups of multifunctional organosilanes undergo bulk hydrolysis and (inter)condensation, forming polysilane networks before depositing onto the substrates [92].…”

Self‐Assembled Monolayer Coatings on Nanostencils for the Reduction of Materials Adhesion

“…In particular, water plays an important role in the surface reaction: traces of water appear to be necessary in order to hydrolyze the Si±Cl or Si± OR bonds of the silanes before the condensation reaction with surface OH groups can occur. [8] However, silanols generated by this hydrolysis can also react with chloro-or alkoxy silanes in solution, giving polymer threads and globules which can contaminate the surface by physisorption or chemisorption (via non-polymerized functionalities). Thus, working under exclusion of moisture is indispensable in order to avoid contamination and to suppress the competing bulk polymerization reactions, but complete removal of water from solvents, equipment, and substrates can inhibit the desired surface reaction.…”