One-step fabrication of polyamide 6 hollow fibre membrane using non-toxic diluents for organic solvent nanofiltration

Abstract

We developed new polyamide 6 hollow fibre membranes using a green process to fabricate cutting-edge "organic solvent nanofiltration" membranes by one-step spinning process for organic solvent separation.This economic and sustainable membrane showed good rejection and durability performance in various organic solvents.Organic solvent nanoltration (OSN) process is one of the emerging separation technologies used extensively in various industries such as petrochemical, pharmaceutical, chemical, and food for the purication or separation of organic solvents.

Hollow Fiber Membrane for Organic Solvent Nanofiltration: A Mini Review

“…Some scholars have explored green production process to prepare HF OSN membranes. Jeon et al [ 52 , 53 ] spun polyamide (PA) 6 HF OSN fiber membranes in one step via TIPS method with using green dimethyl sulfone and sulfolane as non-toxic diluents. The preparation of polyamide 6 HF OSN membranes does not require the crosslinking step, which provides a unique approach to further simplify the membrane manufacturing process.…”

“…Many types of polymer materials have been used to fabricate HF OSN membranes, including PI [ 15 , 28 ], PAN [ 47 , 48 ], PBI [ 19 , 54 ], PA [ 52 , 61 ], PPTA [ 32 ], PVDF [ 18 ], polyetherimide [ 67 , 86 ], PAI [ 31 , 42 ], PPSU [ 43 ], PANi [ 44 ], and polypropylene [ 77 ]. PI is the most widely used polymer to prepare OSN membranes because of its good heat resistance, chemical stability, easy processing, etc.…”

“…From a sustainable and green point of view, the major membrane manufacturing processes are environmentally unfriendly [ 130 ]. In recent years, many published papers have reported on sustainable, environmentally friendly membrane materials and membrane preparation processes [ 52 , 61 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 , 142 ]. It is foreseeable that one of the common areas for future HF OSN membrane R&D should be the green and sustainable preparation of HF OSN membranes.…”

Recent advances in polymer membranes employing non-toxic solvents and materials

“…Zhang et al 79 adopted a LT-TPS method to fabricate hydrophobic PVDF membranes using PEG and TEP as green diluents, and the tensile strength of the resulting membranes was enhanced. Jeon et al 219 developed a new polyamide hollow fiber membranes via TIPS using nontoxic solvents (PEG300, PEG400, PEG600 and dimethyl sulfone ((DMSO 2 )). The membranes were fabricated using a one-step spinning process and showed satisfactory performance towards organic solvent separations.…”