One‐dimensional polymer nanofiber arrays with high aspect ratio obtained by thermal nanoimprint method
One‐dimensional polymer nanofiber arrays with high aspect ratio obtained by thermal nanoimprint method
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DOI：
10.1002/pen.24403
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发表时间：
2017-02
影响因子：
3.2
通讯作者：
Paritat Muanchan;Shohei Suzuki;T. Kyotani;Hiroshi Ito
中科院分区：
文献类型：
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作者：
Paritat Muanchan;Shohei Suzuki;T. Kyotani;Hiroshi Ito
模拟自然行为的聚合物表面改性一直是人们非常感兴趣的课题。具有多种用途的聚合物纳米纤维阵列的制备已经得到了广泛的研究。避免化学溶剂，减少加工时间，改善纳米纤维的尺寸分布和长宽比，以及提高再现性是工业价值创造的追求。本研究探讨了一种聚合物纳米纤维阵列的替代制造方法，该方法使用阳极氧化铝（AAO）纳米孔模板和热纳米压印光刻相结合，以实现简单，精确的加工。在此基础上，采用40 μ m厚的薄膜和50-100 nm直径的聚苯乙烯（PS）和聚丙烯（PP）制备了纳米纤维阵列。在这项研究中，除了生产最大长度为130微米、宽高比为2600的PP纳米纤维外，还生产了直径为50纳米、最大长度为50微米、最大宽高比为1000的PS纳米纤维。熔融聚合物流动对纳米纤维长度的影响与压印工艺条件、聚合物性质、AAO性质以及AAO与熔融聚合物之间的表面润湿性有关。此外，AAO纳米约束显示了聚合物的分子取向排列，这影响了所获得的聚合物纳米纤维阵列的热性能、结晶度和机械性能。变异较大。ENG。科学。， 57:214-223, 2017。©2016美国塑料工程师学会
Polymer surface modification that mimicks natural behaviors has been a subject of great interest. Fabrication of polymer nanofiber arrays with various applications has been studied intensively. Avoidance of chemical solvents, reduction of processing time, improvement of the nanofiber size distribution and aspect ratios, and improvement of reproducibility have been sought for industrial value creation. This study examines an alternative fabrication methods for polymer nanofiber arrays using a combination of anodic aluminum oxide (AAO) nanoporous template and thermal nanoimprinting lithography for simple, precise processing. Based on those results, nanofiber arrays were fabricated with 40‐µm‐thick film and 50–100 nm fiber diameter polystyrene (PS) and polypropylene (PP). For this study, 50‐nm diameter PS nanofibers with 50 µm maximum length and a maximum aspect ratio of 1,000 were produced in addition to PP nanofibers having 130 µm maximum length and an aspect ratio of 2,600. The nanofiber lengths were affected considerably by molten polymer flow related to imprint processing conditions, polymer properties, AAO properties, and surface wettability between AAO and molten polymers. Moreover, AAO nanoconfinement demonstrated molecular orientation alignment of polymers that affect thermal properties, crystallinity, and mechanical properties of the obtained polymer nanofiber arrays. POLYM. ENG. SCI., 57:214–223, 2017. © 2016 Society of Plastics Engineers