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Effect of coating on the mechanical properties of electrospun poly(3-hydroxybutyrate) materials with targeted fibers alignment
Journal of Polymer Research ( IF 2.6 ) Pub Date : 2021-01-05 , DOI: 10.1007/s10965-020-02373-1
Irena Borisova , Olya Stoilova , Nevena Manolova , Iliya Rashkov

Understanding the mechanical behavior of electrospun materials and how to control it is important and valuable in terms of their future applications. That is why, in this study, materials with controlled fibers alignment and desired mechanical properties were fabricated by electrospinning of poly(3-hydroxybutyrate) (PHB) onto three types of rotating collectors – drum (smooth), blade and grid (patterned). In addition, by controlling the collector rotation speed and by coating of the PHB mats with chitosan or cellulose acetate, purposely tailored fibers alignment and targeted design of the materials were achieved. Further, the detailed surface morphology, thermal behavior and crystallinity of the PHB materials were characterized by SEM, DSC and XRD. It was demonstrated that patterned collectors had a significant impact on fibers alignment only at lower rotation speed, whereas with the increase in the collector speed the fibers alignment increased in the direction of collector rotation. The materials strength was evaluated by tensile tests and indicated that PHB materials fabricated at lower collector rotation speed exhibited isotropic mechanical properties, whereas those at higher collector rotation speed – anisotropic. In addition, coating of PHB materials with chitosan or cellulose acetate enhanced their mechanical properties. Hence, this study demonstrates the possibilities for fabrication of electrospun materials with desired fibers alignment and thus, with targeted mechanical properties.



中文翻译:

涂层对定向纺丝的电纺聚3-羟基丁酸酯材料力学性能的影响

了解电纺材料的机械性能以及如何控制其性能,对于它们的未来应用而言非常重要且有价值。这就是为什么在本研究中,通过将聚(3-羟基丁酸酯)(PHB)电纺丝到三种类型的旋转收集器上(鼓形(光滑),叶片和网格(图案化))来制造具有可控纤维排列和所需机械性能的材料的原因。另外,通过控制收集器的旋转速度并通过用壳聚糖或乙酸纤维素涂覆PHB垫,可以实现有针对性的定制纤维排列和目标设计的材料。此外,通过SEM,DSC和XRD表征了PHB材料的详细表面形态,热行为和结晶度。已经证明,图案化的收集器仅在较低的旋转速度下才对纤维排列有显着影响,而随着收集器速度的增加,纤维排列在收集器旋转方向上增加。通过拉伸试验评估了材料强度,结果表明,以较低收集器旋转速度制造的PHB材料表现出各向同性的机械性能,而以较高收集器旋转速度制造的材料则具有各向异性。此外,用壳聚糖或醋酸纤维素涂覆PHB材料可提高其机械性能。因此,这项研究证明了制造具有所需纤维排列并因此具有目标机械性能的电纺材料的可能性。随着收集器速度的增加,纤维排列在收集器旋转的方向上增加。通过拉伸试验评估了材料强度,结果表明,以较低收集器旋转速度制造的PHB材料表现出各向同性的机械性能,而以较高收集器旋转速度制造的材料则具有各向异性。此外,用壳聚糖或醋酸纤维素涂覆PHB材料可提高其机械性能。因此,这项研究证明了制造具有所需纤维排列从而具有目标机械性能的电纺材料的可能性。随着收集器速度的增加,纤维排列在收集器旋转的方向上增加。通过拉伸试验评估了材料强度,结果表明,在较低收集器转速下制造的PHB材料表现出各向同性的机械性能,而在较高收集器转速下制造的PHB材料具有各向异性。此外,用壳聚糖或醋酸纤维素涂覆PHB材料可提高其机械性能。因此,这项研究证明了制造具有所需纤维排列从而具有目标机械性能的电纺材料的可能性。而那些具有更高收集器转速的–各向异性的。此外,用壳聚糖或醋酸纤维素涂覆PHB材料可提高其机械性能。因此,这项研究证明了制造具有所需纤维排列从而具有目标机械性能的电纺材料的可能性。而那些具有更高收集器转速的–各向异性的。此外,用壳聚糖或醋酸纤维素涂覆PHB材料可提高其机械性能。因此,这项研究证明了制造具有所需纤维排列从而具有目标机械性能的电纺材料的可能性。

更新日期:2021-01-05
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