유기용매 나노여과 공정에서 높은 투과성을 위해 폴리아미드 층에 통합된 헥사데카노일 클로라이드 변형 UiO-66을 통한 박막 나노 복합체 막의 제조 및 성능 연구

Abstract

Thin-film nanocomposite (TFN) membranes, which are a form of nanoparticles inserted into thin-film composite (TFC) membranes, have the advantages of high separation efficiency and high permeability in organic solvent nanofiltration (OSN) and have been widely studied. In this study, to prepare a kind of thin-film nanocomposite (TFN) OSN membrane, a metal-phenolic networks (MPN) was coated on a polyethersulfone (PES) substrate to enhance the interface compatibility between PES and polyamide (PA), and the interfacial polymerization was carried out using an aqueous solution of m-phenylene diamine (MPD) containing hydrophobically modified UiO-66 (HE-UiO) with hexadecanoyl chloride and a hexene solution of trimethyl chloride (TMC). The HE-UiO nanomaterials change the conformation of the polyamide during the interfacial polymerization process and lead to higher solvent permeation due to the interaction between the long alkyl chain and the organic solvent. The synthesized HE-UiO was characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectrometer (XPS), brunauer emmett teller (BET), and X-ray diffraction (XRD). The as-prepared TFC and TFN membranes were characterized by field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), XPS, FT-IR, and OSN experiments, and the results showed that the TFN membrane with 0.02 wt.% HE-UiO incorporated showed the best performance (IPA permeance : 1.44 LMH/bar, rose bengal rejection : 95.6 %), suggesting that OSN membranes with high permeation performance can be fabricated.