Chemical Modification of Polymers. 13. Sulfonation of Polystyrene Surfaces

NIR‐Triggered Synergic Photo‐chemothermal Therapy Delivered by Reduced Graphene Oxide/Carbon/Mesoporous Silica Nanocookies

“…The gray powder was collected by centrifugation at 5000 rpm for 10 min, followed by washing 3 times with an excess of pure ethanol and drying in a vacuum at 60 °C. For sulfonation of polystyrene as describe by Gibson et al, [ 34 ] the gray powder was soaked in H 2 SO 4 solution at 40 °C for 4 h, followed by washing 3 times with an excess of pure ethanol and drying in a vacuum at 60 °C. Finally, the sulfonated-polystyrene was completely carbonized by heat treatment at 800 °C for 3 h under argon gas to obtain nanocookies.…”

Immobilization of Acidithiobacillus ferrooxidans on sulfonated microporous poly(styrene–divinylbenzene) copolymer with granulated activated carbon and its use in bio-oxidation of ferrous iron

“…In the spectra for sulfSDVB, the asymmetric and symmetric stretching modes of \SO 3 H groups were observed at 1174 and 1063 cm − 1 reflection bands. In the literature, it was reported that the asymmetric and symmetric stretching absorptions appeared at 1150-1260 cm − 1 and 1010-1080 cm − 1 , respectively [23,24]. The peak at 640 cm − 1 is considered to be due the S-OH stretching absorptions which are reported to lie between 600 and 700 cm − 1 .…”

Characterization of sulfate and phosphate containing plasma polymer surfaces

“…The ATR-IR spectra suggested that bond cleavages occur mainly at P-O-C and C-C bonds. The ATR-IR spectra of the SO 2 -Happ showed bands at 1170-1173 and 1045-7 cm -1 , which can be assigned to asymmetric [10][11][12] and symmetric stretching vibrations of SO 2 [10,11,13,14] in sulfonate groups or sulfonic acid groups [8]. Another distinctive band was also observed at 865 cm -1 and this band was likely to be assignable to a stretching mode of …”