Inner‐coated highly selective thin film nanocomposite hollow fiber membranes for the mixture gas separation

Abstract

Polyamide-based thin film nanocomposite (TFN) membranes were prepared by incorporating nanoparticles in an aqueous phase containing mphenylenediamine (MPD) and an organic phase containing trimesoyl chloride (TMC) by interfacial polymerization (IP) method. The 3-aminopropyltrimethoxy silane grafted mesoporous synthetic hectorite (APTMSH) was synthesized and added in an aqueous monomer solution while the IP. In this work, the TFN layer interfacial compatibility has been enhanced by building the covalent bond between APTMSH and other two monomers by IP method. The coating of the TFN selective layer was done on the inner surface of polysulfone hollow fiber membranes. The interesting results were obtained for the binary mixture gas separation containing water vapor/N 2 and CO 2 /CH 4 . Improved gas permeance and selectivity have been obtained using APTMSH-incorporated TFN membranes. The developed TFN membranes have been characterized using several physicochemical methods. The results show that with the addition of APTMSH in MPD solution up to 0.5 w/w% the best water vapor permeance 2485 GPU and CO 2 permeance 22.3 GPU were obtained along with water vapor/N 2 selectivity 725.5 and CO 2 /CH 4 selectivity 26.

(3-Aminopropyl)trimethoxysilane-Functionalized Titanium Dioxide Thin-Film Nanocomposite Membrane: Enhanced Rejection Performance for Unary and Binary High-Salt Wastewater

“…In addition, modification of the PA layer by TiO 2 nanoparticles increases the hydrophilic amide bond (–NH 2 ) on the membrane surface. Thus, the incorporation of TiO 2 nanoparticles on the PA layer allows water droplets to easily expand on it. , Additionally, the result was consistent with Ingole’s findings: the water vapor permeance was increased until a certain level after the addition of APTMSH particles along with selectivity.…”

“…Thus, the incorporation of TiO 2 nanoparticles on the PA layer allows water droplets to easily expand on it. 35,36 Additionally, the result was consistent with Ingole's findings: 22 the water vapor permeance was increased until a certain level after the addition of APTMSH particles along with selectivity.…”

“…A commonly used chemical modification method is to treat inorganic nanoparticles by silane coupling agents. , Ingole synthesized the 3-aminopropyltrimethoxysilane-grafted mesoporous synthetic hectorite (APTMSH) and added it to an aqueous monomer solution during interfacial polymerization. The results showed that the APTMSH-incorporated TFN membranes obtained improved gas permeance and selectivity for binary mixture gas separation containing water vapor/N 2 and CO 2 /CH 4 .…”

Green Preparation and Porous Structure Construction of Polyphenylene Sulfide Hollow Fiber Membrane via Melt-Spinning and Hot-Stretching Method

“…1,2 The main advantages of membrane-based technologies are lower energy consumption. 3 As a semicrystalline polymer, PPS is widely used as a structural material for advanced equipment due to its excellent mechanical properties at high-temperature and low manufacturing costs. 4−8 The thermally induced phase separation (TIPS) is common technology for preparing porous membranes based on the removal of thermal energy from a polymeric solution system.…”

“…In the past ten years, membrane technology has developed rapidly and has been widely used in sewage treatment, seawater desalination, industrial product concentration, drug separation, energy, aerospace, electronics and other fields. , The main advantages of membrane-based technologies are lower energy consumption . As a semicrystalline polymer, PPS is widely used as a structural material for advanced equipment due to its excellent mechanical properties at high-temperature and low manufacturing costs. − The thermally induced phase separation (TIPS) is common technology for preparing porous membranes based on the removal of thermal energy from a polymeric solution system .…”