Aamer Hanaa, Kim Sang-Bum, Oh Jong-Min, Park Hyeokjin, Jo Young-Min
Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Korea.
Green Process and Material R&D Group, Korea Institute of Industrial Technology, Cheonan 31056, Korea.
Nanomaterials (Basel). 2021 Sep 6;11(9):2313. doi: 10.3390/nano11092313.
The incorporation of metal oxide nanoparticles (NPs) in fiber filters is an effective approach to enhance the specific surface area and surface roughness of the fiber, hence improving their efficiency for fine dust capture and other gas treatment or biological applications. Nevertheless, uneven distribution of NPs limits their practical applications. In this study, a commercial silane coupling agent (3-methacryloxypropyltrimethoxysilane) was used to improve the dispersion of zinc oxide (ZnO) NPs in thin polyacrylonitrile fibers. Scanning electron microscopy (SEM) revealed that the fibers incorporating the silane-modified NPs exhibited better distribution of NPs than those prepared with pristine ZnO NPs. The silane modification enhanced the specific surface area, surface roughness, and fiber porosity. In particular, the nanofiber filter incorporating 12 wt% ZnO NPs modified with 0.5 g silane per g of ZnO NPs maintained a filtration efficiency of 99.76% with a low pressure drop of 44 Pa, excellent antibacterial activity, and could decompose organic methylene blue dye with an efficiency of 85.11% under visible light.
将金属氧化物纳米颗粒（NPs）掺入纤维过滤器是提高纤维比表面积和表面粗糙度的有效方法，从而提高其捕获细粉尘以及用于其他气体处理或生物应用的效率。然而，纳米颗粒分布不均限制了它们的实际应用。在本研究中，使用一种商业硅烷偶联剂（3-甲基丙烯酰氧基丙基三甲氧基硅烷）来改善氧化锌（ZnO）纳米颗粒在聚丙烯腈细纤维中的分散性。扫描电子显微镜（SEM）显示，与用原始ZnO纳米颗粒制备的纤维相比，掺入硅烷改性纳米颗粒的纤维显示出更好的纳米颗粒分布。硅烷改性提高了比表面积、表面粗糙度和纤维孔隙率。特别是，每克ZnO纳米颗粒用0.5克硅烷改性的含12 wt% ZnO纳米颗粒的纳米纤维过滤器保持了99.76%的过滤效率，低压降为44 Pa，具有优异的抗菌活性，并且在可见光下能够以85.11%的效率分解有机亚甲基蓝染料。
