Tuning Surface Wettability of Poly(3‐sulfopropyl methacrylate) Brushes by Cationic Surfactant‐Driven Interactions

Abstract

In this communication, polyanionic poly(potassium 3‐sulfopropyl methacrylate) (PSPM) brushes were switched from hydrophilic to hydrophobic by exchange of the counter cations. First, poly(potassium 3‐sulfopropyl methacrylate) brushes were grown by means of atom transfer radical polymerization (ATRP) from thiol monolayers of initiating ω‐mercaptoundecyl bromoisobutyrate and mixed monolayers of thiol initiator and 1‐undecanothiol (blank thiol) attached to gold surfaces. The kinetics of the polymerization reaction were followed by means of the quartz microbalance technique with dissipation (QCM‐D). The collapse of PSPM brushes in the presence of cationic surfactants like quaternary ammonium salts (tetraethylammonium bromide, hexadecyltrimethylammonium bromide) and imidazolium salts (1‐dodecyl‐3‐methylimidazolium bromide, 1H,1H,2H,2H‐perfluoro‐1‐decyl‐3‐methylimidazolium bromide) was shown by QCM‐D. Water contact angle measurements proved that the wettability of the surface could be tuned reversibly from hydrophilic values (<30 °) to hydrophobic ones (>85 °).magnified image

A versatile macro-initiator with dual functional anchoring groups for surface-initiated atom transfer radical polymerization on various substrates

“…The most obvious change in contact angles was observed with PSPMA brush modification, which were all less than 10 , leading to superhydrophilic surfaces. 56 In the XPS spectra (Fig. 7A-C), the strong S 2p peaks appeared at about 168.8 eV but were not detected in the original PI, PTFE, and PDMS, indicating the successful grafting of the PSPMA brushes.…”

“…7A-C), the strong S 2p peaks appeared at about 168.8 eV but were not detected in the original PI, PTFE, and PDMS, indicating the successful grafting of the PSPMA brushes. 56 Using the same method, we also tried to graft polymer brushes on textile and wood surfaces, which are two useful substrates for daily application. 57 As shown in Fig.…”

Polymer Brushes with Precise Architectures for Molecular Biorecognition

“…Huck's group has investigated sulfopropyl methacrylate brushes containing silver cations [34]. While this Ag + loaded system was effective for preventing bacterial colonization, a subsequent paper showed that the effective silver concentrations were also cytotoxic towards mammalian cells.…”

Holes and Ledges Created by Multilayer Assembly on Polyelectrolyte Brushes: A Novel Route for the Three‐Dimensional Nanoscale Design of Surfaces

“…Then, the sample was immersed in 10 À2 M 1-undecanethiol in EtOH to fill nonpatterned regions. Finally, the samples were rinsed and Surface Polymerization [19] PSPM was synthesized from the gold surfaces patterned with v-mercaptoundecyl bromo-isobutyrate. For the brush polymerization the patterned surface was incubated at 40 8C for 3 h in a dimethylformamide (DMF)/water solution of sulfo propyl methacrylate (SPM)/2,2-bipyridine/CuCl/ CuCl 2.…”