Preparation, characterization, and performance evaluation of coated PES polymer materials fabricated via dry/wet phase inversion technique

Abstract

Sulfur dioxide (SO 2 ) is the major air pollutant which is emitted from the power plant. In this study, hollow fiber membrane (HFM) separation process is applied for the improvement of SO 2 removal efficiency in the post-combustion gas. HFM was produced by dry/wet phase inversion method and then coated with Polydimethylsiloxane (PDMS). The membrane morphology and characterization were examined with help of scanning electron microscope (SEM), energy dispersion of X-ray spectroscopy (EDX), Fourier transform infrared (FT-IR) and atomic force microscopy (AFM). Polyethersulfone (PES) hollow fiber membranes were tested for the SO 2 /N 2 binary mixed gas separation. Single gas permeance of SO 2 , N 2 , and binary mixture gas (200 ppm of SO 2 ) separation experiment was initiated to observe membrane behavior according to temperature and pressure difference and retentate flow rate. As a result, permeance of SO 2 was 24.9-47.4 GPU and selectivity of SO 2 /N 2 was 1.6-4.2. From the mixture gas separation experiment, SO 2 removal efficiency increased according to stage cut and operating pressure.

Nanoscale Insights into the Protection of Calcium Silicate Hydrate by Polydimethylsiloxane Coatings in Sulfate Environments: Different Degrees of Polymerization

“…In recent years, the challenge of mitigating sulfate attack on concrete has garnered significant attention, with a primary focus on enhancing concrete durability [7][8][9][10]. This phenomenon has been closely linked to the intricate transport of water and solutions within concrete, as extensively reported in the literature [11][12][13].…”

Cobweb-like, Ultrathin Porous Polymer Films for Ultrasensitive NO2 Detection

“…Phase inversion is one of representative technologies in the preparation of porous membranes, which has been widely used in energy storage devices, 40,41 redox flow batteries, 42,43 reverse osmosis membranes, 44 and gas separation. 45,46 It is worth mentioning that our strategy is fully compatible with economical solution processability and adopts deionized water as a nonsolvent, which is extremely simple and ecofriendly, promoting sustainable development of green and low-cost electronics.…”