Effect of Thermal Annealing on the Surface Properties of Electrospun Polymer Fibers
Effect of Thermal Annealing on the Surface Properties of Electrospun Polymer Fibers
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DOI：
10.1002/marc.201300290
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发表时间：
2014-02-01
影响因子：
4.6
通讯作者：
Yao, I-Chun
中科院分区：
文献类型：
--
作者：
Chen, Jiun-Tai;Chen, Wan-Ling;Yao, I-Chun
静电纺丝聚合物纤维由于其独特的性能和在药物输送、催化或组织工程等领域的应用而越来越重要。大多数控制静电纺丝聚合物纤维形态和性能的研究集中在改变静电纺丝条件。然而，后处理工艺对静电纺聚合物纤维形态和性能的影响研究很少。在这里，热退火对静电纺丝聚合物纤维的表面性质的影响进行了研究。采用静电纺丝法制备聚甲基丙烯酸甲酯和聚苯乙烯纤维，然后进行热处理。在热退火时，静电纺丝聚合物纤维的表面粗糙度降低。平滑过程的驱动力是聚合物纤维和空气之间的界面能的最小化。退火后纤维的水接触角也随退火时间的延长而减小。
Electrospun polymer fibers are gaining importance because of their unique properties and applications in areas such as drug delivery, catalysis, or tissue engineering. Most studies to control the morphology and properties of electrospun polymer fibers focus on changing the electrospinning conditions. The effects of post-treatment processes on the morphology and properties of electrospun polymer fibers, however, are little studied. Here, the effect of thermal annealing on the surface properties of electrospun polymer fibers is investigated. Poly(methyl methacrylate) and polystyrene fibers are fist prepared by electrospinning, followed by thermal annealing processes. Upon thermal annealing, the surface roughness of the electrospun polymer fibers decreases. The driving force of the smoothing process is the minimization of the interfacial energy between polymer fibers and air. The water contact angles of the annealed polymer fibers also decrease with the annealing time.