(562n) Inverse Vulcanized Polysulfide-Based Foam with Hierarchical Pore Structure for Effective and Efficient Heavy Metal Sequestration
In this work, hydrophilic PS was synthesized by copolymerizing elemental sulfur with ethylene glycol dimethacrylate (EGDMA). Different S-EGDMA PS were prepared according to different S:EGDMA molar ratio and were thoroughly analyzed to propose their structure and characterized in terms of morphology and other physico-chemical properties. Their ability to sequester mercury (II) were evaluated via adsorption isotherm, kinetics, and thermodynamics.
The S-EGDMA PS was configured into a macroporous foam. PS were incorporated in poly(vinyl alcohol) (PVA) matrix via blending, cryo-dessication, and chemical cross-linking. This ensured the high quality and convenient loading control of PS in the foam. The composite foams were thoroughly characterized and evaluated in terms of mercury (II) adsorption capacity, kinetics, and thermodynamics. Mechanical durability vis-à-vis reusability was also evaluated. This study features significant advantages not only to the competitive mercury (II) adsorption performance of the materials but also to the cost-effectiveness of the material preparation.
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No. 2018R1D1A1B07047503 and No. 2017R1A2B2002109) and by the Ministry of Education (No. 22A20130012051(BK21Plus)).