Fabrication of nanofiber meltblown membranes and their filtration properties
Fabrication of nanofiber meltblown membranes and their filtration properties
复制标题
DOI：
10.1016/j.memsci.2012.09.050
复制
发表时间：
2013-01-01
影响因子：
9.5
通讯作者：
Khan, Saad. A.
中科院分区：
文献类型：
--
作者：
Hassan, Mohammad Abouelreesh;Yeom, Bong Yeol;Khan, Saad. A.
熔喷是一种独特的一步工艺，直接从聚合物树脂生产自粘纤维非织造膜，平均纤维直径在 1 至 2 μm 之间。由于许多制造资产已经到位，因此需要确定使用该工艺制造纳米或亚微米纤维的路线。预计这些非织造膜将在医疗、卫生、过滤、生物分离等关键领域得到应用。在这项研究中，我们研究了不同模具配置和操作条件对纤维和纤网特性的影响。我们还报告了将纤维尺寸减小到一微米以下的策略，以相对于传统熔喷网以更低的基重实现更高的过滤质量。将它们的性能与使用典型模具设计生产的对照熔喷样品进行比较。我们发现使用这种新的模具设计可以生产平均纤维尺寸在 300-500 nm 范围内的纳米熔喷膜，并报告了产生此类结构的工艺操作条件。这些样品的过滤效率与我们的对照样品相同，基重减少了 88%，但聚合物产量较低。较低的基重还导致较低的压降，总体而言，新样品表现出更高的品质因数，是对照样品的两倍。这些结果显示了纳米熔喷纤维在过滤应用中的巨大应用前景。 (C) 2012 Elsevier B.V. 保留所有权利。
Meltblowing is a unique one-step process for producing self-bonded fibrous nonwoven membranes directly from polymer resins, with average fiber diameter ranging between 1 and 2 mu m. Determining routes for making nano- or submicron-fibers using this process are desirable since there are many manufacturing assets that are already in place. It is envisaged that these nonwoven membranes will find applications in critical areas such as medical, hygiene, filtration, bioseparation, and others. In this study, we investigate the influence of different die configurations and operating conditions on fiber and web characteristics. We also report on strategies for reducing the fiber size below one micron to achieve higher filtration quality at lower basis weight relative to the conventional meltblown webs. Their performance is compared to a control meltblown sample produced by using a typical die design. We find that production of nano-meltblown membranes with an average fiber size in the range of 300-500 nm using this new die design is possible and report on process operating conditions that result in such structures. These samples achieve equal filtration efficiencies to that of our control sample at 88% reduced basis weight but at a lower polymer throughput. The lower basis weight also resulted in a lower pressure drop and overall, the new samples exhibited a higher quality factor, twice that of the control. These results show significant promise for the use of nano-meltblown fibers in filtration applications. (C) 2012 Elsevier B.V. All rights reserved.