纳米纤维
材料科学
热塑性聚氨酯
膜
化学工程
静电纺丝
聚氨酯
复合材料
硝酸银
银纳米粒子
核化学
化学
聚合物
纳米颗粒
弹性体
纳米技术
生物化学
工程类
作者
Yong Xia,Ling‐Yun He,Jundan Feng,Song Xu,Lirong Yao,Gangwei Pan
出处
期刊:Nanomaterials
[MDPI AG]
日期:2022-05-25
卷期号:12 (11): 1813-1813
被引量:8
摘要
Nanofiber membrane has high biological protection function because of its good waterproof and moisture permeability properties. However, this membrane usually lacks active antimicrobial properties, limiting the application in reusable bioprotective textiles. Herein, waterborne polyurethane-capped Ag nanoparticles (AgNPs) were synthesized by reducing silver nitrate in water by sodium borohydride in the presence of polyurethane. AgNP-embedded thermoplastic urethane (TPU) nanofiber membrane was prepared by electrospinning a mixed solution of AgNPs and TPU. As-prepared membranes with Ag content of 50–300 mg·kg−1 have an average diameter of 0.75, 0.64, and 0.63 μm and good fiber uniformity. The doping of AgNP-embedded nanomembrane showed increased breaking force probably because of the induced crystallization effect. Test results showed that as-prepared TPU nanofiber membrane with silver content as low as 100 mg·kg−1 showed good washing resistance. The antibacterial rates of E. coli and S. aureus remained 99.99% with 50 times of soaping or chlorine washing. The corresponding waterproof and moisture permeability properties of nanofiber membrane with a thickness of 0.1 mm remained nearly unchanged, i.e., moisture permeability of around 2600 g·m−2 per 24 h and the hydrostatic pressure resistance of around 400 Pa after 50 times of soaping or chlorine washing.
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