静电纺丝
溶剂
纳米纤维
化学工程
材料科学
膜
二甲基亚砜
丙酮
多孔性
二甲基甲酰胺
聚合物
氟化物
高分子化学
化学
复合材料
有机化学
无机化学
工程类
生物化学
作者
Francesca Russo,Claudia Ursino,Elisa Avruscio,Giovanni Desiderio,Andrea Perrone,Sergio Santoro,Francesco Galiano,Alberto Figoli
出处
期刊:Membranes
[MDPI AG]
日期:2020-02-26
卷期号:10 (3): 36-36
被引量:66
标识
DOI:10.3390/membranes10030036
摘要
Electrospinning is an emerging technique for the preparation of electrospun fiber membranes (ENMs), and a very promising one on the basis of the high-yield and the scalability of the process according to a process intensification strategy. Most of the research reported in the literature has been focused on the preparation of poly (vinylidene fluoride) (PVDF) ENMs by using N,N- dimethylformamide (DMF) as a solvent, which is considered a mutagenic and cancerogenic substance. Hence, the possibility of using alternative solvents represents an interesting approach to investigate. In this work, we explored the use of dimethyl sulfoxide (DMSO) as a low toxicity solvent in a mixture with acetone for the preparation of PVDF-ENMs. As a first step, a solubility study of the polymer, PVDF 6012 Solef®, in several DMSO/acetone mixtures was carried out, and then, different operating conditions (e.g., applied voltage and needle to collector plate distance) for the successful electrospinning of the ENMs were evaluated. The study provided evidence of the crucial role of solution conductivity in the electrospinning phase and the thermal post-treatment. The prepared ENMs were characterized by evaluating the morphology (by SEM), pore-size, porosity, surface properties, and performance in terms of water permeability. The obtained results showed the possibility of producing ENMs in a more sustainable way, with a pore size in the range of 0.2–0.8 µm, high porosity (above 80%), and water flux in the range of 11.000–38.000 L/m2·h·bar.
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