Sulfur-dipentene polysulfides: from industrial waste to sustainable, low-cost materials

Abstract

The synthesis of poly(S-dipentene) with a sulfur content greater than 50 wt % by catalytic inverse vulcanization in the presence of zinc-based accelerators was investigated at 140 °C for the...

Polysulfides as Sorbents in Support of Sustainable Recycling

“…29,57 Several other elements, including Cd 2+ , Co 2+ , Cu 2+ , Pb 2+ , Zn 2+ , Mn 2+ , Ni 2+ , Pd 2+ , and Cr 3+ , have been briefly tested but exhibited adsorption percentages of <50%. 52,53,55,75 However, as previously mentioned, Fe 3+ has demonstrated poor adsorption by multiple polysulfides and stronger adsorption by others. As such, it would be premature to assume that no polysulfides can achieve strong adsorption of these metals.…”

“…Recently, a sulfur-dipentene polysulfide has demonstrated preferential adsorption for Fe 3+ in a solution also containing Cr 3+ , Ni 2+ , Co 2+ , and Cu 2+ . 75 Unfortunately, polysulfides are still far from competitive with other materials regarding Fe sorption (Figure 3c). CNT (85.88 mg/g), zeolites (95.4 mg/g), and magnetite nanorods (127.01 mg/g) reported in the literature all far exceed the Fe capacities of polysulfides.…”

“… However, this corresponded to an adsorption capacity of only 0.8 mg/g (Figure c). Recently, a sulfur-dipentene polysulfide has demonstrated preferential adsorption for Fe 3+ in a solution also containing Cr 3+ , Ni 2+ , Co 2+ , and Cu 2+ . Unfortunately, polysulfides are still far from competitive with other materials regarding Fe sorption (Figure c).…”

“…Aside from the three metals mentioned above, various other metal ions have been screened for absorptivity. High removal percentages for As (80%) and Sb (85%) from solution have been noted; unfortunately, full investigations have not been performed to investigate the absorptivity of these metals. , Several other elements, including Cd 2+ , Co 2+ , Cu 2+ , Pb 2+ , Zn 2+ , Mn 2+ , Ni 2+ , Pd 2+ , and Cr 3+ , have been briefly tested but exhibited adsorption percentages of <50%. ,,, However, as previously mentioned, Fe 3+ has demonstrated poor adsorption by multiple polysulfides and stronger adsorption by others. As such, it would be premature to assume that no polysulfides can achieve strong adsorption of these metals.…”

Inverse Vulcanized Polymers for Sustainable Metal Remediation

“…Another sulfur polymer synthesized by Tritto and co‐workers was also explored in iron sorption, with the ability to remove 83% of Fe(III) in 24 h. [ 41 ] The polysulfide was made with dipentene, a mixture of monoterpenic olefins, and a diethyldithiocarbamate‐based reaction accelerator. This product was further reacted post‐polymerization with garlic oil, diallyl disulfide, and myrcene ( Figure ).…”