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<p>Biodegradable cellulose acetate butyrate (CAB) nanofiber membranes containing Ag-decorated TiO<sub>2</sub> nanowires were fabricated via electrospinning. These nanofibers exhibited UV- blocking and antibacterial properties and can be used as skin contact products such as cosmetic patches and facial masks. TiO<sub>2</sub> is widely used as an inorganic UV-blocking agent in cosmetics. However, crystalline TiO<sub>2</sub> at the nanoscale can generate reactive oxygen species (ROS) and may penetrate into the compromised skin, raising safety concerns. Anatase TiO<sub>2</sub> exhibits much higher photocatalytic activity than rutile. Therefore, one-dimensional (1D) rutile-phase TiO<sub>2</sub> nanowires were selected and synthesized through electrospinning and calcination to reduce penetration risk and minimize ROS generation while maintaining high UV-blocking efficiency. Ag nanoparticles were deposited onto the TiO<sub>2</sub> surface using tannic acid, which served both as a reductant and a stabilizer. This could confer the light independent antibacterial activity. The CAB nanofibers containing Ag/TiO<sub>2</sub> exhibited an average fiber diameter of 715.35&#xa0;nm and a membrane thickness of 31&#xa0;μm, achieving a UV-blocking rate of 99.3% and a UPF value of 265 (50+). Antibacterial tests indicated no activity for CAB and TiO<sub>2</sub>–CAB nanofibers. In contrast, the Ag/TiO<sub>2</sub>–CAB nanofibers exhibited inhibition zones of 2&#xa0;mm for <i>E. coli</i> and 3&#xa0;mm for <i>S. aureus</i> which indicates effective antibacterial performances.</p> Graphical abstract <p></p>

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Biodegradable electrospun nanofiber membranes containing Ag-decorated TiO2 nanowires with antibacterial and UV-blocking properties

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Minyeong Jeon,
  • Jaeseon Lee,
  • Seong-Geun Oh

摘要

Biodegradable cellulose acetate butyrate (CAB) nanofiber membranes containing Ag-decorated TiO2 nanowires were fabricated via electrospinning. These nanofibers exhibited UV- blocking and antibacterial properties and can be used as skin contact products such as cosmetic patches and facial masks. TiO2 is widely used as an inorganic UV-blocking agent in cosmetics. However, crystalline TiO2 at the nanoscale can generate reactive oxygen species (ROS) and may penetrate into the compromised skin, raising safety concerns. Anatase TiO2 exhibits much higher photocatalytic activity than rutile. Therefore, one-dimensional (1D) rutile-phase TiO2 nanowires were selected and synthesized through electrospinning and calcination to reduce penetration risk and minimize ROS generation while maintaining high UV-blocking efficiency. Ag nanoparticles were deposited onto the TiO2 surface using tannic acid, which served both as a reductant and a stabilizer. This could confer the light independent antibacterial activity. The CAB nanofibers containing Ag/TiO2 exhibited an average fiber diameter of 715.35 nm and a membrane thickness of 31 μm, achieving a UV-blocking rate of 99.3% and a UPF value of 265 (50+). Antibacterial tests indicated no activity for CAB and TiO2–CAB nanofibers. In contrast, the Ag/TiO2–CAB nanofibers exhibited inhibition zones of 2 mm for E. coli and 3 mm for S. aureus which indicates effective antibacterial performances.

Graphical abstract