Nauman Saad, Lubineau Gilles, Alharbi Hamad F
COHMAS Laboratory, Physical Sciences and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
MS&E Department, Institute of Space Technology, Islamabad 44000, Pakistan.
Membranes (Basel). 2021 Jan 5;11(1):39. doi: 10.3390/membranes11010039.
Electrospinning is a versatile technique which results in the formation of a fine web of fibers. The mechanical properties of electrospun fibers depend on the choice of solution constituents, processing parameters, environmental conditions, and collector design. Once electrospun, the fibrous web has little mechanical integrity and needs post fabrication treatments for enhancing its mechanical properties. The treatment strategies include both the chemical and physical techniques. The effect of these post fabrication treatments on the properties of electrospun membranes can be assessed through either conducting tests on extracted single fiber specimens or macro scale testing on membrane specimens. The latter scenario is more common in the literature due to its simplicity and low cost. In this review, a detailed literature survey of post fabrication strength enhancement strategies adopted for electrospun membranes has been presented. For optimum effect, enhancement strategies have to be implemented without significant loss to fiber morphology even though fiber diameters, porosity, and pore tortuosity are usually affected. A discussion of these treatments on fiber crystallinity, diameters, and mechanical properties has also been produced. The choice of a particular post fabrication strength enhancement strategy is dictated by the application area intended for the membrane system and permissible changes to the initial fibrous morphology.
静电纺丝是一种用途广泛的技术，可形成精细的纤维网。静电纺丝纤维的机械性能取决于溶液成分的选择、加工参数、环境条件和收集器设计。一旦完成静电纺丝，纤维网的机械完整性较差，需要进行后处理以提高其机械性能。处理策略包括化学和物理技术。这些后处理对静电纺丝膜性能的影响可以通过对提取的单纤维试样进行测试或对膜试样进行宏观尺度测试来评估。由于其简单性和低成本，后一种情况在文献中更为常见。在本综述中，对静电纺丝膜采用的后处理强度增强策略进行了详细的文献调查。为了达到最佳效果，即使纤维直径、孔隙率和孔隙曲折度通常会受到影响，增强策略的实施也不能对纤维形态造成显著损失。还讨论了这些处理对纤维结晶度、直径和机械性能的影响。特定后处理强度增强策略的选择取决于膜系统的应用领域以及对初始纤维形态允许的变化。
