Li Chong, Wang Haoyu, Zhao Xiaolei, Yang Kaihua, Meng Qinhua, Zhang Longwang
Center for Engineering Training, Harbin Engineering University, Harbin 150001, China.
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Membranes (Basel). 2023 Feb 21;13(3):257. doi: 10.3390/membranes13030257.
In this study, the composite nanofiber membranes (AgNPs-PS/PET) composed of hydrophobic polystyrene (PS) embedded with different additions of silver nanoparticles (AgNPs) and hydrophilic hydrolyzed polyethylene terephthalate (PET) were prepared via electrospinning technology to achieve the function of unidirectional water penetration. The addition of AgNO was at 0 wt%, 0.5 wt%, 1.0 wt% and 1.5 wt% as the variables. The surface morphology and structure of AgNPs-PS/PET composite nanofibers were characterized by scanning electron microscopy (SEM), x-ray energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). The SEM image showed that the fibers of the composite materials were continuous and uniform as a result of electrospinning. The presence and content of Ag nanoparticles dispersed in the nanofibers were investigated using EDS and TEM. The contact angle (CA) was tested to illustrate the wettability of the composite nanofiber membranes using a static contact angle measuring instrument and the process of unidirectional water penetration was recorded. Meanwhile, the mechanism of unidirectional water penetration was analyzed. Moreover, the electrospinning solution's viscosity and conductivity were also investigated. Eventually, the optimal addition of AgNO (1.0 wt%) was confirmed and the prepared AgNPs-PS/PET composite nanofiber membranes were able to achieve the function of unidirectional water penetration. These membranes have the potential to be applied in smart textiles, unidirectional water collection and wound dressing.
在本研究中，通过静电纺丝技术制备了由嵌入不同添加量银纳米颗粒（AgNPs）的疏水性聚苯乙烯（PS）和亲水性水解聚对苯二甲酸乙二酯（PET）组成的复合纳米纤维膜（AgNPs-PS/PET），以实现单向透水功能。以AgNO的添加量为0 wt%、0.5 wt%、1.0 wt%和1.5 wt%作为变量。通过扫描电子显微镜（SEM）、X射线能量色散光谱（EDS）和透射电子显微镜（TEM）对AgNPs-PS/PET复合纳米纤维的表面形态和结构进行了表征。SEM图像显示，由于静电纺丝，复合材料的纤维连续且均匀。使用EDS和TEM研究了分散在纳米纤维中的银纳米颗粒的存在情况和含量。使用静态接触角测量仪测试接触角（CA）以说明复合纳米纤维膜的润湿性，并记录单向透水过程。同时，分析了单向透水的机理。此外，还研究了静电纺丝溶液的粘度和电导率。最终，确定了AgNO的最佳添加量（1.0 wt%），制备的AgNPs-PS/PET复合纳米纤维膜能够实现单向透水功能。这些膜具有应用于智能纺织品、单向集水和伤口敷料的潜力。
