Electrospinning on 3D Printed Polymers for Mechanically Stabilized Filter Composites
Electrospinning on 3D Printed Polymers for Mechanically Stabilized Filter Composites
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DOI：
10.3390/polym11122034
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发表时间：
2019-12-01
期刊：
影响因子：
5
通讯作者：
Ehrmann, Andrea
中科院分区：
文献类型：
--
作者：
Kozior, Tomasz;Mamun, Al;Ehrmann, Andrea
静电纺丝是制备空气和水过滤器的常用方法。静电纺丝过滤垫可以具有非常小的孔，允许过滤甚至最小的颗粒或分子。此外，它们的高表面积与体积比允许整合可通过光降解另外处理过滤材料、具有抗微生物性质等的材料，从而增强其适用性。然而，精细的缓冲垫容易受到机械损坏。可能的解决方案包括通过将它们嵌入复合材料中或将它们粘合到机械稳定性更高的层上来增强。在以前的研究中，我们表明，通常可以通过在其上3D打印刚性聚合物层来稳定静电纺丝纤维。由于该过程在技术上并不容易，并且需要一些经验来避免分层以及热喷嘴损坏防热垫，因此在此我们报告了反向技术（即，首先3D打印刚性支架，随后在其顶部电纺纤维毡）。我们表明，尽管在常见的刚性打印聚合物的情况下，两种材料之间的粘附力不足，但防粘垫对热塑性聚氨酯（TPU）的3D打印支架显示出很强的粘附力。这为结合3D打印和静电纺丝的第二种方法铺平了道路，以制备具有纳米纤维表面的机械稳定的过滤器。
Electrospinning is a frequently used method to prepare air and water filters. Electrospun nanofiber mats can have very small pores, allowing for filtering of even the smallest particles or molecules. In addition, their high surface-to-volume ratio allows for the integration of materials which may additionally treat the filtered material through photo-degradation, possess antimicrobial properties, etc., thus enhancing their applicability. However, the fine nanofiber mats are prone to mechanical damage. Possible solutions include reinforcement by embedding them in composites or gluing them onto layers that are more mechanically stable. In a previous study, we showed that it is generally possible to stabilize electrospun nanofiber mats by 3D printing rigid polymer layers onto them. Since this procedure is not technically easy and needs some experience to avoid delamination as well as damaging the nanofiber mat by the hot nozzle, here we report on the reversed technique (i.e., first 3D printing a rigid scaffold and subsequently electrospinning the nanofiber mat on top of it). We show that, although the adhesion between both materials is insufficient in the case of a common rigid printing polymer, nanofiber mats show strong adhesion to 3D printed scaffolds from thermoplastic polyurethane (TPU). This paves the way to a second approach of combining 3D printing and electrospinning in order to prepare mechanically stable filters with a nanofibrous surface.