Natsathaporn Papada, Herwig Gordon, Altenried Stefanie, Ren Qun, Rossi René M, Crespy Daniel, Itel Fabian
Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210 Thailand.
Laboratory for Biomimetic Membranes and Textiles, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.
Adv Fiber Mater. 2023 May 17:1-15. doi: 10.1007/s42765-023-00291-7.
Reusable face masks are an important alternative for minimizing costs of disposable and surgical face masks during pandemics. Often complementary to washing, a prolonged lifetime of face masks relies on the incorporation of self-cleaning materials. The development of self-cleaning face mask materials requires the presence of a durable catalyst to deactivate contaminants and microbes after long-term use without reducing filtration efficiency. Herein, we generate self-cleaning fibers by functionalizing silicone-based (polydimethylsiloxane, PDMS) fibrous membranes with a photocatalyst. Coaxial electrospinning is performed to fabricate fibers with a non-crosslinked silicone core within a supporting shell scaffold, followed by thermal crosslinking and removal of the water-soluble shell. Photocatalytic zinc oxide nanoparticles (ZnO NPs) are immobilized on the PDMS fibers by colloid-electrospinning or post-functionalization procedures. The fibers functionalized with ZnO NPs can degrade a photo-sensitive dye and display antibacterial properties against Gram-positive and Gram-negative bacteria ( and ) due to the generation of reactive oxygen species upon irradiation with UV light. Furthermore, a single layer of functionalized fibrous membrane shows an air permeability in the range of 80-180 L/ms and 65% filtration efficiency against fine particulate matter with a diameter less than 1.0 µm (PM).
The online version contains supplementary material available at 10.1007/s42765-023-00291-7.
在大流行期间，可重复使用的口罩是降低一次性和外科口罩成本的重要替代方案。口罩的长时间使用寿命通常与清洗相辅相成，这依赖于自清洁材料的加入。自清洁口罩材料的开发需要一种耐用的催化剂，以便在长期使用后使污染物和微生物失活，同时又不降低过滤效率。在此，我们通过用光催化剂对硅基（聚二甲基硅氧烷，PDMS）纤维膜进行功能化来制备自清洁纤维。采用同轴静电纺丝法制备纤维，使其在支撑壳支架内具有非交联的硅氧烷芯，然后进行热交联并去除水溶性壳。通过胶体静电纺丝或后功能化程序将光催化氧化锌纳米颗粒（ZnO NPs）固定在PDMS纤维上。用ZnO NPs功能化的纤维可以降解一种光敏染料，并且由于在紫外光照射下产生活性氧物种，对革兰氏阳性菌和革兰氏阴性菌显示出抗菌性能。此外，单层功能化纤维膜的透气率在80 - 180 L/（m·s）范围内，对直径小于1.0 µm的细颗粒物（PM）的过滤效率为65%。
在线版本包含可在10.1007/s42765 - 023 - 00291 - 7获取的补充材料。
