High removal of chlorinated solvents by reusable polydimethylsiloxane based absorbents

Abstract

The objective of this work is to prepare absorbent materials based on polydimethylsiloxane (PDMS) for the absorption of organic solvents by a relative simple method, with large absorption capacities and reusability. Different particles (ZnO, MgSO4, ZnCl2, and NaHCO3) were first incorporated in PDMS and then removed by immersion in HCl (c) or water. The absorbent materials were characterized by TGA, mercury porosimetry, stress–strain curves, SEM, EDS, XPS, FTIR, and water contact angle. The materials can absorb polar organic chlorinated solvents (carbon tetrachloride, dichloroethene, dichloromethane, and chloroform) more than four times its own weight. Other solvents were also tested showing 2–3 times its own weight. Additionally, these materials show demulsification properties and absorption of oleophilic compounds. The reusability of the material makes them good candidates for remediation of polluted water.

Poly(vinylidene fluoride‐hexafluoropropylene)/mesoporous graphitic carbon nitride composite membranes for photocatalytic methylene blue degradation and sensing applications

“…Membrane support is required to incorporate the mpg-C 3 N 4 materials to maximize the photocatalytic reaction. [60][61][62][63][64] A membrane fabricated via electrospinning was applied to suspend the catalyst. 65 Although various polymer and their mpg-C 3 N 4 composite have been used by few researchers, to the best of our knowledge, no work has been done using poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/mpg-C 3 N 4 for MB detection and degradation.…”

“…Membrane support is required to incorporate the mpg‐C 3 N 4 materials to maximize the photocatalytic reaction 60–64 . A membrane fabricated via electrospinning was applied to suspend the catalyst 65 .…”