Li Qiu-Sheng, He Hong-Wei, Fan Zuo-Ze, Zhao Ren-Hai, Chen Fu-Xing, Zhou Rong, Ning Xin
Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China.
Polymers (Basel). 2020 Mar 6;12(3):606. doi: 10.3390/polym12030606.
Polypropylene (PP) fibers are employed commonly as the raw material of technical textiles (nonwovens), and the research focuses on fine-denier fibers and their functionalities. In this work, antibacterial PP masterbatches with different dosage (1-5 wt.%) of nano-ZnO particles as the antibacterial agent were prepared via a twin-screw extruder. The as-prepared PP masterbatches were electrospun on a home-made electrospinning device to afford ultra-fine PP fibers. The morphologies of as-spun ultrathin PP fibers with 16 μm of average diameter were observed by SEM. The structure and element distribution were characterized by means of energy-dispersive spectroscopy (EDS) and Fourier-transfer infrared spectroscopy (FTIR), respectively. There was some zinc obviously distributed on the surface when a dosage of ZnO more than 1 wt.% was used, which contributed to the antibacterial activity. The crystallinity of PP fibers was not affected strongly by the dosage of ZnO based on the differential scanning calorimetry (DSC) heating curves, while thermal decomposition improved with the increase in ZnO content, and the mechanical strength decreased predictably with the increase in inorganic ZnO content.
聚丙烯（PP）纤维通常用作工业用纺织品（非织造布）的原材料，并且研究集中在细旦纤维及其功能上。在这项工作中，通过双螺杆挤出机制备了含有不同剂量（1-5 wt.%）纳米ZnO颗粒作为抗菌剂的抗菌PP母粒。将制备好的PP母粒在自制的静电纺丝装置上进行静电纺丝，以得到超细PP纤维。通过扫描电子显微镜（SEM）观察平均直径为16μm的初生超细PP纤维的形态。分别通过能量色散光谱（EDS）和傅里叶变换红外光谱（FTIR）对结构和元素分布进行表征。当使用的ZnO剂量超过1 wt.%时，有一些锌明显分布在表面，这有助于抗菌活性。基于差示扫描量热法（DSC）加热曲线，PP纤维的结晶度受ZnO剂量的影响不大，而热分解随着ZnO含量的增加而改善，并且机械强度随着无机ZnO含量的增加而可预测地降低。
