Dodero Andrea, Brunengo Elisabetta, Castellano Maila, Vicini Silvia
Department of Chemistry and Industrial Chemistry (DCCI), University of Genoa, Via Dodecaneso 31, 16146 Genova, Italy.
Institute of Chemical Sciences and Technologies "Giulio Natta" (SCITEC), Italian National Research Council (CNR), Via De Marini 6, 16149 Genova, Italy.
Polymers (Basel). 2020 Jul 9;12(7):1524. doi: 10.3390/polym12071524.
Polyvinylpyrrolidone electrospun membranes characterized by randomly, partially, or almost completely oriented nanofibers are prepared using a drum collector in static (i.e., 0 rpm) or rotating (i.e., 250 rpm or 500 rpm) configuration. Besides a progressive alignment alongside the tangential speed direction, the nanofibers show a dimension increasing with the collector rotating speed in the range 410-570 nm. A novel design of experiment approach based on a face-centred central composite design is employed to describe membrane mechanical properties using the computation of mathematical models and their visualization via response surface methodology. The results demonstrate the anisotropic nature of the fibre-oriented membranes with Young's modulus values of 165 MPa and 71 MPa parallelly and perpendicularly to the alignment direction, respectively. Above all, the proposed approach is proved to be a promising tool from an industrial point of view to prepare electrospun membranes with a tailored mechanical response by simply controlling the collector speed.
使用鼓式收集器，以静态（即0转/分钟）或旋转（即250转/分钟或500转/分钟）配置制备具有随机、部分或几乎完全取向的纳米纤维的聚乙烯吡咯烷酮电纺膜。除了沿切线速度方向逐渐排列外，纳米纤维的尺寸在410-570纳米范围内随收集器转速增加。采用基于面心中心复合设计的新型实验方法，通过数学模型计算及其响应面方法可视化来描述膜的力学性能。结果表明，纤维取向膜具有各向异性，平行和垂直于排列方向的杨氏模量值分别为165兆帕和71兆帕。最重要的是，从工业角度来看，所提出的方法被证明是一种很有前途的工具，通过简单地控制收集器速度来制备具有定制力学响应的电纺膜。
