The shape of the fiber will greatly affect the filtration performance of the membrane. The presence of beads increases the distance between the fibers, thereby reducing the pressure drop. Moreover, the basis weight of the membrane greatly affects the filtration efficiency. The efficiency of the HIPS nanofiber membrane with a weight per unit area of 12.22 gm(-2) is greater than 99.999%.
Compared with the original PAN ENM, the adsorption rates of HCHO and xylene are increased by 66% and 73%, respectively. It was found that the composite ENM is non-toxic to human lung cell lines, which indicates that it is a good candidate for both air filtration and VOC adsorption in breathing filter media.
Two types of high-performance nanofiber filters are developed by branch-shaped nanofibers, in which extra fibers are spun out to radiate from the main fibers. Subsequently, we compared them with conventional and beaded nanofiber filters in terms of particle removal efficiency, filter pressure drop and particle loading capacity.
PET / SiO2 NNF has a lower pressure drop increase rate and higher dust removal rate. The completion cycle of PET / SiO2 NNF is longer than that of PPS NF and PTFE CNF, thus prolonging its service life in practical applications. The successful synthesis of PET / SiO2 NNF provides a new method for the synthesis of innovative high-performance needle felt filters.
This study discusses the fabrication of multilayer composite membranes by a combination of electrospinning and vapor-induced phase separation (VIPS). It can be used as a stent for tissue engineering, a drug delivery device, a filter element for water, wastewater and air treatment.
Through continuous electrospinning and electrospray technology, a highly breathable and thermally comfortable film combining an asymmetric super-wet skin layer and nanofiber membrane is manufactured. Good air permeability, high filtration efficiency and low pressure drop are better than commercial polypropylene products.
Through macromolecular design and electrospinning process, a simple method was designed to synthesize a new type of air filter composed of cellulose acetate and poly(ionic liquid). The filter's removal rate of PM 10 and PM 2.5 particles reached 99.65% and 97.94%, respectively. In addition, the filter has excellent antibacterial properties against Escherichia coli and Staphylococcus aureus.
By proposing an alternative to this problem as a catalyst, the basis and application of metal-organic frameworks are discussed. A method of preparing membranes by electrospinning while using eco-friendly polymers has been developed. MOF can be used in the environmental part of catalytic activity, and may provide important materials for catalysts in other fields in the near future.
A layered SiO2@PTFE nanofiber membrane is reported. It has a uniform pore structure, high gas permeability, excellent oil fume filtration efficiency and low pressure drop. In addition, our perfluorinated amphiphilic SiO2@PTFE nanofiber membrane shows good reusable and stable performance.
Due to the high specific surface area and activity of Ni nanofibers themselves, Ni nanofibers also achieve impressive NO-to-N-2 and NO adsorption capabilities. Therefore, the multifunctional nickel nanofiber filter has the potential of practical application in automobile exhaust gas purification converters.
A series of films made of polystyrene microfibers with different morphologies were prepared by the electrospinning method. The porous straight fibers have excellent filtration performance for cigarette smoke and aerosols of various sizes (for particles with sizes of 0.3μm, 0.5μm and 1μm, the filtration efficiency is 99.76%, 99.92% and 99.99%).
The use of electrospinning technology to prepare nanofiber membranes from various sources of expanded polystyrene (EPS) waste and its application in air filtration media are reported. All EPS nanofiber filters have great potential as air filtration media. The EPS filter made from food packaging waste has a solution concentration of 15 wt%, and its highest efficiency and quality factor are 99.99% and 0.15 Pa-1, respectively.