材料科学
空气过滤器
过滤(数学)
静电纺丝
超细纤维
纳米纤维
透气比表面积
纳米技术
基质(水族馆)
多孔性
空气过滤
化学工程
复合材料
聚合物
图层(电子)
有机化学
化学
入口
机械工程
统计
数学
工程类
海洋学
微粒
地质学
作者
Xin Fan,Lingshuang Rong,Lushi Kong,Yuxin Li,Junrong Huang,Yungang Cao,Wei‐Hong Zhong
标识
DOI:10.1021/acsami.0c20596
摘要
Integrating nanostructured active materials, antimicrobial components, and rational porous structures is one of the promising approaches for simultaneously boosting removal efficiency, antimicrobial capacity, mechanical property, hydrophobic performance, and air permeability of air filters. However, realizing these performances of an air filter still remains a big challenge. Herein, a multifunctional air filter zNFs-Ag@PT, which is composed of a unique substrate prepared from Ag nanoparticles (AgNPs)-paper towel (PT) microfibers and an upper layer formed from aligned zein nanofibers (zNFs) inspired by a “tug-of-war” repulsion force, is reported. The Ag@PT substrate is fabricated via in situ reduction; and zNFs are prepared by electrospinning a well-prepared zein Pickering emulsion onto a specially designed collector. The innovative collector is a partially conductive design composed of an insulative middle section and two conductive ends. It is demonstrated that the introduction of AgNPs not only endows the zNFs-Ag@PT filter with an effective antimicrobial activity but also provides the substrate with an anisotropic electric field to achieve stretched and aligned zein fibers forming thinner nanofibers than that without AgNPs. As a result, the filtration performances of a zNFs-Ag@PT filter are enhanced. This study initiates an effective way to fabricate bio-based multifunctional air filters with antimicrobial and filtration performances via combining nano- and biotechnology.
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