Číková Eliška, Kuliček Jaroslav, Janigová Ivica, Omastová Mária
Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
Materials (Basel). 2018 Sep 15;11(9):1737. doi: 10.3390/ma11091737.
The electrospinning of an ethylene vinyl acetate (EVA) copolymer with a vinyl acetate content of 28 wt.% is limited due to the solubility of the copolymer in standard laboratory conditions. Poly(lactic acid) (PLA) is a biodegradable polymer that can be electrospun easily. However, PLA has limited applicability because it is brittle. Blends of these polymers are of interest in order to obtain new types of materials with counterbalanced properties originating from both polymeric compounds. The fibers were electrospun on a water surface from a solution mixture containing various weight ratios of both polymers using a dichloromethane and acetone (70:30 /) mixture as solvent. The morphologies of the prepared non-woven mats were examined by scanning electron microscopy (SEM), and the chemical composition was investigated by X-ray photoelectron spectroscopy (XPS) and by Fourier Transform Infrared Spectroscopy (FTIR). The fibers' thermal properties and stability were examined, and the mechanical properties were tested. The results showed that the strength and flexibility of the blend samples were enhanced by the presence of PLA.
由于乙烯-醋酸乙烯酯（EVA）共聚物在标准实验室条件下的溶解性，醋酸乙烯酯含量为28 wt.% 的该共聚物的静电纺丝受到限制。聚乳酸（PLA）是一种可生物降解的聚合物，易于进行静电纺丝。然而，PLA因其脆性而适用性有限。为了获得具有源自两种聚合物的平衡性能的新型材料，这些聚合物的共混物受到关注。使用二氯甲烷和丙酮（70:30 /）的混合物作为溶剂，从含有两种聚合物不同重量比的溶液混合物在水表面上静电纺丝制备纤维。通过扫描电子显微镜（SEM）检查制备的非织造垫的形态，并通过X射线光电子能谱（XPS）和傅里叶变换红外光谱（FTIR）研究化学成分。检查了纤维的热性能和稳定性，并测试了机械性能。结果表明，PLA的存在提高了共混样品的强度和柔韧性。
