Joint Laboratory of Advanced Biomedical Materials (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, PR China.
Beijing Key Laboratory of Lignocellulosic Chemistry, and MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, PR China.
J Colloid Interface Sci. 2021 Jan 15;582(Pt B):506-514. doi: 10.1016/j.jcis.2020.08.075. Epub 2020 Aug 25.
Air particulate pollution from ever-increasing industrialization poses an enormous threat to public health. Thus, the development of a green air filter with high efficiency and performance is of urgent necessity. In this study, we introduce a new effective air filtration membrane that can be used for outdoor protection. The air filter's composite nanofibre materials were prepared from polyvinyl alcohol (PVA)-sodium lignosulfonate (LS) via a "green" electrospinning method and thermal crosslinking. The addition of LS helped increase the PM removal efficiency compared to that of a pure PVA nanofibre membrane. The pressure drops of the electrospun PVA-LS membranes exceeded those of the pristine PVA air filter. The remarkable air filtration performance was maintained even after 10 cycles of circulation filtration. In addition, the PVA-LS composite nanofibre membrane exhibited excellent mechanical properties and transparency due to the introduction of LS. This study provides new insight into the design and development of high-performance and high-visibility green filter media, which include personal protection and building screens.
日益增长的工业化所带来的空气颗粒污染物对公众健康构成了巨大威胁。因此，开发高效能、高性能的绿色空气过滤器迫在眉睫。在本研究中，我们引入了一种新的有效空气过滤膜，可用于户外防护。空气过滤器的复合纳米纤维材料是通过“绿色”静电纺丝法和热交联由聚乙烯醇（PVA）-木质素磺酸钠（LS）制备的。与纯 PVA 纳米纤维膜相比，LS 的添加有助于提高 PM 去除效率。静电纺 PVA-LS 膜的压降超过了原始 PVA 空气过滤器的压降。即使经过 10 次循环过滤，其出色的空气过滤性能仍得以维持。此外，由于 LS 的引入，PVA-LS 复合纳米纤维膜表现出优异的机械性能和透明度。本研究为高性能、高可视性绿色过滤介质的设计和开发提供了新的思路，包括个人防护和建筑屏风。
