By electrospinning the synthesized polyamic acid solution onto a polyimide mat, and then performing a thermal imidization process, a commercial polyimide non-woven fabric coated with a heat-resistant polyimide nanofiber membrane was prepared . This article proposes a simple method to improve the filtration performance of commercial polyimide nonwoven fabric filters.
Two different processes in the literature are discussed, namely electrospinning and hot pressing. The results show that when MOF is applied to textiles, the hot pressing method has more advantages in terms of adsorption and removal efficiency.
The reduced graphene oxide (rGO) nanosheets (NSs) are introduced into electrospun polyacrylonitrile (PAN) NFM to enhance the surface activity and air permeability of the composite NFM in the air filtration process. The best NFM containing 2.5 wt% rGO NS showed a PM2.5 removal efficiency of >99.9%.
Here, a calcinable polymer membrane with effective recovery after fouling is reported, which shows a complete restoration of the original oil/water separation efficiency. The chemically fouled polymer membrane can be easily recovered without degradation of separation performance and mechanical performance due to annealing treatment.
In this study, we used redox polymerization to develop a cellulose-grafted polyvinylaminoamide (CL-g-PEAA) anion exchange nanofiber membrane adsorber with narrow effective pore size distribution.
The nanofiber material produced by electrospinning is characterized by high porosity, large specific surface area and high pore interconnectivity, and therefore shows the potential for separation and filtration, for example. By designing the hydrophobicity or absorptivity of the silica material, rapid gravity-driven membrane separation of heterogeneous azeotropes can be achieved.
The effects of different heating rates and different atmospheres on magnesium borate fibers produced by electrospinning were studied. This sample shows a much higher specific surface area. Mg3B2O6 is the main crystalline phase here, and part of the boron is lost during the heat treatment.
PVA is commonly used in the manufacture of continuous nanofibers. Under the same pressure drop of 50 Pa, the PM2.5 removal efficiency of the SF/PVA filter is 99.11 +/- 0.24%, which is about 10% higher than that of the pure PVA filter. SF/PVA nanofiber air filter has excellent filtering performance and has broad prospects in preventing PM pollution.
A simple and green method is proposed to manufacture double mesh membranes to effectively filter fine particles of PM. The PM capture measurement results show that the hybrid film exhibits significantly better PM capture than the bare PMIA film, and the removal efficiencies of PM2.5 and PM10 are 97.33% and 98.48%, respectively.
The air purification research was carried out on the activated carbon-impregnated cellulose acetate fiber filter produced by electrospinning technology. The filtration efficiency increases with the increase of activated carbon, and the adsorption capacity of acetone increases.
A new type of Pt / Al2O3 nanofiber membrane catalyst. The Pt / Al2O3 film exhibits remarkable mechanical properties, with a tensile stress of 44.14 MPa. The membrane also has excellent filtration performance, significantly reducing the turbidity of water.
An environmentally friendly antibacterial polylactic acid (PLA)/chitosan composite air filter was prepared using one-step electrospinning technology. They have high antibacterial activity against Escherichia coli and Staphylococcus aureus of 99.4% and 99.5%, respectively. It also shows obvious effective air purification performance.