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Electrospun Nanofibrous Membrane: Studies on Processing Parameters, Pore Sizes and Applications.

机译：电纺纳米纤维膜：工艺参数，孔径和应用研究。

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摘要

Nanofibrous membranes generated by the electrospinning technique possess several unique structural properties, such as high surface and bulk porosity, high surface-to-volume ratio and interconnected pores, and have attracted considerable attention in the past two decades. For many of the membrane applications, such as tissue engineering and water filtration, the pore size and its distribution are important parameters. A better understanding of the relationships between the pore size, membrane thickness, fiber diameter and porosity is crucial for tailoring such membranes for specific applications. Capillary flow porometry was used to study the pore size, and quantitative relationships between the mean flow pore size and other structure properties can be obtained.;The design and characterization of nanofibrous membranes with specific properties, as well as the exploration of their potential applications represent another part of the dissertation. In the nanofibrous membrane application to microfiltration, electrospun membranes with different pore sizes were evaluated for their performance in removing water-borne bacteria by using spherical particles with different sizes as the simulants. Another issue deals with the bonding between the nanofibrous membrane and its non-woven substrate which often requires further strengthening for many practical applications in the ultrafiltration and nanofiltration range. A simple hot-pressing method combined with an interfacial treatment has been tried to improve the bonding between the support and the electrospun layer. The further modified structure could provide better mechanical support when used as the scaffold of the UF/NF membranes to withstand backflushing.;The electrospun nanofibrous membrane also demonstrated its application to the lithium-ion battery. By depositing the electrospun polyethersulfone membrane onto the chemically treated commercial polyethylene microporous separator, the thermal property and the safety margin of such a separator could be greatly improved, without sacrificing other properties of the separator.;A simple method of preparing the efficient and cost-effective electrospun nanofibrous microfiltration membranes with hazard chromium (VI) removal ability was presented. A functional material with a high positive charge density was grafted onto the nanofibers. The resulting membrane demonstrated both superior Cr(VI) adsorption capacity to the commercial activated carbons and reusability after proper treatment.
机译：通过电纺丝技术产生的纳米纤维膜具有多种独特的结构特性，例如高的表面和整体孔隙率，高的体积比和相互连接的孔，在过去的二十年中引起了相当大的关注。对于许多膜应用（例如组织工程和水过滤），孔径及其分布是重要的参数。更好地了解孔径，膜厚度，纤维直径和孔隙率之间的关系对于为特定应用定制此类膜至关重要。用毛细管流动孔隙率法研究了孔径，并获得了平均流量孔径与其他结构性质之间的定量关系。；具有特定性质的纳米纤维膜的设计，表征以及其潜在应用的探索论文的另一部分。在用于微滤的纳米纤维膜中，通过使用具有不同尺寸的球形颗粒作为模拟物，评估了具有不同孔径的电纺膜在去除水性细菌方面的性能。另一个问题涉及纳米纤维膜与其非织造基底之间的粘合，这对于超滤和纳米过滤范围内的许多实际应用常常需要进一步加强。已经尝试了将简单的热压方法与界面处理相结合以改善支撑体和电纺丝层之间的结合。当用作UF / NF膜的支架以承受反吹时，经过进一步修饰的结构可以提供更好的机械支撑。电纺纳米纤维膜也证明了其在锂离子电池中的应用。通过将电纺聚醚砜膜沉积到化学处理过的商用聚乙烯微孔隔膜上，可以大大提高这种隔膜的热性能和安全裕度，而不会牺牲隔膜的其他性能。提出了有效的静电纺丝纳米纤维微滤膜，具有危险的铬（VI）去除能力。具有高正电荷密度的功能材料被接枝到纳米纤维上。所得膜在适当处理后，显示出对市售活性炭优异的Cr（VI）吸附能力和可重复使用性。

著录项

  • 作者

    Liu, Yang.;

  • 作者单位

    State University of New York at Stony Brook.;

  • 授予单位 State University of New York at Stony Brook.;
  • 学科 Chemistry Physical.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 238 p.
  • 总页数 238
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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