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首页> 外文期刊>Journal of Applied Polymer Science >The Influence of Process Parameters on the Properties of Electrospun PLLA Yarns Studied by the Response Surface Methodology
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The Influence of Process Parameters on the Properties of Electrospun PLLA Yarns Studied by the Response Surface Methodology

机译：响应面法研究工艺参数对电纺PLLA纱性能的影响

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Poly (l-lactide) (PLLA) fibrous yarns were prepared by electrospinning of polymer solutions in 2,2,2-trifluoroethanol. Applying spinning from two oppositely charged needles the spontaneous formed triangle of fibers at a grounded substrate could be assembled into fibrous yarns using a device consisting of a take-up roller and twister. The effect of processing parameters on the morphology, diameter and mechanical properties of PLLA yarns was investigated by the response surface methodology (RSM). This method allowed evaluating a quantitative relationship between polymer concentration, voltage, take-up rate and distance between the needles' center and the take-up unit on the properties of the electrospun fibers and yarns. It was found that at increasing concentrations up to 9 wt % uniform fibers were obtained with increasing mean diameters. Conversely, the fiber diameter decreased slightly when the applied voltage was increased. The take-up rate had a significant influence on the yarn diameter, which increased as the take-up rate decreased. The tensile strength and modulus of the yarns were correlated with these variables and it was found that the polymer concentration had the largest influence on the mechanical properties of the yarns. By applying the RSM, it was possible to obtain a relationship between processing parameters which are important in the fabrication of electrospun yarns. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41388.
机译：聚（l-丙交酯）（PLLA）纤维纱是通过将聚合物溶液在2,2,2-三氟乙醇中进行电纺丝而制备的。使用两个由带相反电荷的针进行纺丝，可以使用由卷取辊和加捻器组成的装置将自发形成的三角形纤维在接地的基材上组装成纤维纱。通过响应面法（RSM）研究了加工参数对聚乳酸（PLLA）纱线形态，直径和力学性能的影响。这种方法可以评估聚合物浓度，电压，卷绕速度和针头中心与卷绕单元之间距离对电纺纤维和纱线性能的定量关系。已经发现，在浓度增加至多9wt％的情况下，获得具有均匀直径的均匀纤维。相反，当施加的电压增加时，纤维直径略有减小。卷绕速度对纱线直径有显着影响，随着卷绕速度的降低，纱线直径增加。纱线的拉伸强度和模量与这些变量相关，并且发现聚合物浓度对纱线的机械性能具有最大的影响。通过应用RSM，可以获得在电纺纱的制造中重要的加工参数之间的关系。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41388。

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