Continuous Dual-Track Fabrication of Polymer Micro-/Nanofibers Based on Direct Drawing
Continuous Dual-Track Fabrication of Polymer Micro-/Nanofibers Based on Direct Drawing
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DOI：
10.1021/acsmacrolett.9b00167
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发表时间：
2019-05-01
影响因子：
7.015
通讯作者：
Beachley, Vince Z.
中科院分区：
文献类型：
--
作者：
Jao, Dave;Beachley, Vince Z.
这份手稿提出了一种连续而直接的方法，使用自动化的单步拉伸系统来制造悬浮的微米和纳米直径的聚合物纤维。该系统被称为轨道纺纱，基于简单的手动拉丝过程，该过程通过使用两个相反旋转的轨道来实现自动化。纤维通过直接接触涂覆聚合物溶液的轨道，然后随着轨道之间距离的增加而机械拉伸来连续纺丝。该装置可以从多种聚合物和溶剂组合中拉伸微纤维和纳米纤维的单丝或多丝阵列。为了证明这一点，我们从含有聚乙酸乙烯酯(PVAc)和聚亚安酯(PU)的聚合物溶液中拉出纤维。纤维形态光滑均匀，直径对拉伸长度和聚合物溶液/熔体性质敏感。制备了直径为450 nm、长度为255 mm的聚合物纳米纤维。轨道纺丝方法能够从高粘度的溶液和熔体中形成纤维，而这些溶液和熔体与其他一些纳米纤维制造方法不兼容。此外，该设置简单且实施成本低并且无喷嘴，并且不需要电场或高速射流，并且轨道可以加宽和图案化/织构以提高光纤产量和制造精度。
This manuscript proposes a continuous and straightforward method for fabricating suspended micro- and nanodiameter polymer fibers using an automated single-step drawing system. Termed track spinning, the system is based on a simple manual fiber drawing process that is automated by using two oppositely rotating tracks. Fibers are continuously spun by direct contact of polymer solution coated tracks followed by mechanical drawing as the distance between the tracks increases. The device can draw single or multifilament arrays of micro- and nanofibers from many kinds of polymers and solvent combinations. To demonstrate, fibers were pulled from polymer solutions containing polyvinyl acetate (PVAc) and polyurethane (PU). Fiber morphology was smooth and uniform, and the diameter was sensitive to draw length and polymer solution/melt properties. Polymer nanofibers with diameters as small as 450 nm and length of 255 mm were produced. The track spinning method is able to form fibers from high viscosity solutions and melts that are not compatible with some other nanofiber fabrication methods. Further, the setup is simple and inexpensive to implement and nozzleless and does not require an electric field or high-velocity jets, and the tracks can be widened and patterned/textured to enhance fiber yield and manufacturing precision.