塔米索夫NxG作为制备多孔聚偏二氟乙烯膜的一种替代性无毒溶剂。

Tamisolve NxG as an Alternative Non-Toxic Solvent for the Preparation of Porous Poly (Vinylidene Fluoride) Membranes.

作者信息

Russo Francesca, Marino Tiziana, Galiano Francesco, Gzara Lassaad, Gordano Amalia, Organji Hussam, Figoli Alberto

机构信息

Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende, CS, Italy.

Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia.

出版信息

Polymers (Basel). 2021 Aug 3;13(15):2579. doi: 10.3390/polym13152579.

DOI:10.3390/polym13152579

PMID:34372182

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8347625/

Abstract

Tamisolve NxG, a well-known non-toxic solvent, was used for poly(vinylidene fluoride) (PVDF) membranes preparation via a non-solvent-induced phase separation (NIPS) procedure with water as a coagulation bath. Preliminary investigations, related to the study of the physical/chemical properties of the solvent, the solubility parameters, the gel transition temperature and the viscosity of the polymer-solvent system, confirmed the power of the solvent to solubilize PVDF polymer for membranes preparation. The role of polyvinylpyrrolidone (PVP) and/or poly(ethylene glycol) (PEG), as pore former agents in the dope solution, was studied along with different polymer concentrations (10 wt%, 15 wt% and 18 wt%). The produced membranes were then characterized in terms of morphology, thickness, porosity, contact angle, atomic force microscopy (AFM) and infrared spectroscopy (ATR-FTIR). Pore size measurements, pore size distribution and water permeability (PWP) tests placed the developed membranes in the ultrafiltration (UF) and microfiltration (MF) range. Finally, PVDF membrane performances were investigated in terms of rejection (%) and permeability recovery ratio (PRR) using methylene blue (MB) in water solution to assess their potential application in separation and purification processes.

摘要

塔米索夫NxG是一种著名的无毒溶剂，用于通过非溶剂诱导相分离（NIPS）工艺制备聚偏氟乙烯（PVDF）膜，以水作为凝固浴。与溶剂的物理/化学性质、溶解度参数、凝胶转变温度和聚合物-溶剂体系的粘度研究相关的初步调查，证实了该溶剂在溶解PVDF聚合物以制备膜方面的能力。研究了聚乙烯吡咯烷酮（PVP）和/或聚乙二醇（PEG）作为铸膜液中致孔剂的作用，以及不同的聚合物浓度（10 wt%、15 wt%和18 wt%）。然后对制备的膜进行形态、厚度、孔隙率、接触角、原子力显微镜（AFM）和红外光谱（ATR-FTIR）表征。孔径测量、孔径分布和水渗透率（PWP）测试表明，所制备的膜处于超滤（UF）和微滤（MF）范围内。最后，使用水溶液中的亚甲基蓝（MB），通过截留率（%）和渗透率恢复率（PRR）研究PVDF膜的性能，以评估其在分离和纯化过程中的潜在应用。