Electrospun polyvinylidene fluoride/SiO2 nanofibrous membranes with enhanced electret property for efficient air filtration
Electrospun polyvinylidene fluoride/SiO2 nanofibrous membranes with enhanced electret property for efficient air filtration
复制标题
电纺聚偏二氟乙烯/SiO2 纳米纤维膜，具有增强的驻极体性能，可实现高效空气过滤
DOI：
10.1016/j.coco.2019.02.008
复制
发表时间：
2019-06-01
影响因子：
8
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Ding, Xinxin;Li, Yuyao;Ding, Bin
迫切需要能够有效去除颗粒物并让空气轻松通过的空气过滤器，以保护公众免受日益严重的空气污染的影响；然而，事实证明，制造这种过滤介质极具挑战性。在此，通过静电纺丝聚偏二氟乙烯（PVDF）作为基质聚合物和γ-缩水甘油氧基丙基三甲氧基硅烷（GPS）改性的二氧化硅纳米颗粒（SiO2 NPs）作为电荷增强剂，制备了具有显着静电效应的空气过滤材料。设计的前提是GPS改性的SiO2纳米粒子能够均匀分布在PVDF纤维中，产生丰富稳定的界面电荷。受益于GPS@SiO2纳米粒子的单分散状态，所得PVDF/GPS@SiO2纳米纤维膜表现出显着的驻极体效应，表面电位为12.4 kV，过滤性能高，品质因数为0.14，这是以前从未报道过的。我们预计这项工作可以为各种应用的驻极体空气过滤介质的设计和开发提供新的见解。
There is a critical need for air filters with the abilities of removing particles effectively and allowing air to pass through easily to protect the public from increasingly serious air pollution; however, creating such a filter medium has proven to be extremely challenging. Herein, an air filtration material equipped with remarkable electrostatic effect is fabricated by electrospining polyvinylidene fluoride (PVDF) as the matrix polymer and silicon dioxide nanoparticles (SiO2 NPs) modified by gamma-glycidoxypropyl trimethoxysilane (GPS) as the charge enhancer. The premise of the design is that GPS modified SiO2 NPs can be uniformly distributed in PVDF fibers, generating abundant stable interfacial charges. Benefiting from the monodisperse state of GPS@SiO2 NPs, the resultant PVDF/GPS@SiO2 nanofibrous membrane exhibits remarkable electret effect with a surface potential of 12.4 kV and high filtration performance with a quality factor of 0.14, which has never been reported before. We envision that this work can provide new insight into the design and development of electret air filter media for various applications.