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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication and characterization of high flux poly(vinylidene fluoride) electrospun nanofibrous membrane using amphiphilic polyethylene-block-poly(ethylene glycol) copolymer
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Fabrication and characterization of high flux poly(vinylidene fluoride) electrospun nanofibrous membrane using amphiphilic polyethylene-block-poly(ethylene glycol) copolymer

机译：使用两亲聚乙烯 - 嵌段 - 聚（乙二醇）共聚物的高通量聚（偏二氟乙烯）电纺纳米纤维膜的制备与表征

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摘要

Electrospun nanofiber membranes (ENM) made of polymers such as polysulfone and poly(vinylidene fluoride) (PVDF) have a much higher contact angle (CA) and also more hydrophobic when compared to the virgin polymers. For water treatment applications, membranes with hydrophilic nature are highly desirable in order to achieve high flux and less fouling potentials. Hence, in the present study, highly hydrophilic electrospun nanofiber membranes (ENMs) were prepared by blending PVDF polymer with amphiphilic polyethylene-block-poly (ethylene glycol) (PE-b-PEG) copolymer. Resulting amphiphilic ENMs were highly porous (77%-92%) and the breaking elongation of 140% with a young's modulus of 2.55 MPa was observed. When compared with the control PVDF membrane, PE-b-PEG blended ENMs revealed higher water permeation flux owing to the enrichment of the hydrophilic PEG segments at the membrane surface, which was confirmed by using X-ray photoelectric spectroscopy and Energy-dispersive spectroscopy measurements. When compared to the phase inversion process (CA of 97.3 degrees) blended ENM had CA of 0 degrees, which indicates that besides hydrophilic block copolymer segments, the nature of membrane formation also contributes its role in influencing the hydrophilicity of the membrane. This improved hydrophilicity in combination with larger pore sizes of the PVDF/ PE-b-PEG membranes have contributed to enhancement of pure water flux, protein solution permeability and water flux recovery, which can be applied potentially for water treatment applications.
机译：与未经处理的聚合物相比，由聚砜和聚偏氟乙烯（PVDF）等聚合物制成的静电纺纳米纤维膜（ENM）具有更高的接触角（CA）和更高的疏水性。在水处理应用中，具有亲水性的膜是非常理想的，以实现高通量和较小的污染潜力。因此，在本研究中，通过将PVDF聚合物与两亲性聚乙二醇嵌段共聚物（PE-b-PEG）共混，制备了高度亲水的静电纺纳米纤维膜（ENM）。得到的两亲性ENM具有高度多孔性（77%-92%），断裂伸长率为140%，杨氏模量为2.55MPa。与对照PVDF膜相比，PE-b-PEG共混ENMs由于亲水性PEG段在膜表面富集而显示出更高的水渗透通量，这一点通过X射线光电光谱和能量色散光谱测量得到证实。与相转化过程（CA为97.3度）相比，共混ENM的CA为0度，这表明除了亲水性嵌段共聚物段外，膜形成的性质也影响了膜的亲水性。这种亲水性的改善与PVDF/PE-b-PEG膜的更大孔径相结合，有助于提高纯水通量、蛋白质溶液渗透性和水通量回收率，这有可能应用于水处理应用。

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