The metal blades (12-pin) used as supports for the TFME coatings were purchased from PAS Technology Deutschland GmbH (Magdala, Germany). The supports were etched in concentrated hydrochloric acid for 60 min in an ultrasonic bath, then cleaned with distilled water and dried in an oven at 150 °C for 30 min.
The coating slurry was prepared by dispersing the particles in a DMF solution of PAN. The same proportions were used for each type of coating (i.e., PAN/DMF/particles (1.000:18.380:2.375, m/m/m)). All particles—namely, octadecyl, octyl, phenyl-hexyl, cyanopropyl, benzenesulfonic acid, and unbounded silica—were supplied by Phenomenex (Torrance, CA, USA). The characteristics of the particles used to prepare the stationary phases are reported elsewhere in the literature [29 (link)]. The coatings were applied at a length of one centimeter via a spraying method, according to the previously published instructions [42 (link)]. In total, ten layers of coating were applied, with each layer being dried at 110 °C for 3 min after application (to prevent thermal degradation of some particles observed at 180 °C [43 (link)]).
The coating slurry was prepared by dispersing the particles in a DMF solution of PAN. The same proportions were used for each type of coating (i.e., PAN/DMF/particles (1.000:18.380:2.375, m/m/m)). All particles—namely, octadecyl, octyl, phenyl-hexyl, cyanopropyl, benzenesulfonic acid, and unbounded silica—were supplied by Phenomenex (Torrance, CA, USA). The characteristics of the particles used to prepare the stationary phases are reported elsewhere in the literature [29 (link)]. The coatings were applied at a length of one centimeter via a spraying method, according to the previously published instructions [42 (link)]. In total, ten layers of coating were applied, with each layer being dried at 110 °C for 3 min after application (to prevent thermal degradation of some particles observed at 180 °C [43 (link)]).
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