期刊
APPLIED SURFACE SCIENCE
卷 533, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147516
关键词
Poly(vinyl alcohol); Ag nanoparticles; 3,3 ',4,4 '-Biphenyltetracarboxylic acid; Reactive oxygen species; Antibacterial
类别
资金
- National Natural Science Foundation of China [51703147]
- National Fund of China Scholarship Council [201806915013]
- Sichuan Science and Technology Program [2018RZ0034]
- Natural Science Fund of Education Department of Sichuan Province [16ZB0044, 035Z1373]
In this study, poly(vinyl alcohol) (PVA) membranes containing Ag nanoparticles (AgNPs) were prepared by electrospinning and grafted copolymerization with 3,3',4,4'-benzophenone tetracarboxylic acid (BPTA) to provide better mechanical properties, lower water vapor transmittance, and higher antibacterial activity (against Staphylococcus aureus and Escherichia coli) than the PVA/AgNPs membrane. The PVA/AgNPs/BPTA membrane showed higher antibacterial activity than the other membranes, and it produced inhibition zones with diameters of 18.12 +/- 0.08 and 16.41 +/- 0.05 mm against S. aureus and E. coli, respectively. The PVA/AgNPs/BPTA membrane was found to be capable of promoting reactive oxygen species (ROS) formation under both light and dark conditions. Cycling experiments performed following ROS quenching showed that the best-performing composite membrane retained> 70% of its original OH center dot radical and H2O2 charging capacity after seven cycles. In the filtration test, the electrospun nanofibrous membranes showed high filtration efficiencies of 99.98% for sodium chloride (NaCl). In addition, these membranes maintained a relatively low pressure drop of 168 Pa with a basis weight of 2.1 g m(-2). Thus, the PVA/AgNPs/BPTA membrane was concluded to be a promising medical protective material offering the benefits of structural stability and reusability.
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