scholarly journals A Cleanable Self-Assembled Nano-SiO2/(PTFE/PEI)n/PPS Composite Filter Medium for High-Efficiency Fine Particulate Filtration

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7853
Author(s):  
Yan Luo ◽  
Zhongyun Shen ◽  
Zhihao Ma ◽  
Hongfeng Chen ◽  
Xiaodong Wang ◽  
...  

A silicon dioxide/polytetrafluoroethylene/polyethyleneimine/polyphenylene sulfide (SiO2/PTFE/PEI/PPS) composite filter medium with three-dimensional network structures was fabricated by using PPS nonwoven as the substrate which was widely employed as a cleanable filter medium. The PTFE/PEI bilayers were firstly coated on the surfaces of the PPS fibers through the layer-by-layer self-assembly technique ten times, followed by the deposition of SiO2 nanoparticles, yielding the SiO2/(PTFE/PEI)10/PPS composite material. The contents of the PTFE component were easily controlled by adjusting the number of self-assembled PTFE/PEI bilayers. As compared with the pure PPS nonwoven, the obtained SiO2/(PTFE/PEI)10/PPS composite material exhibits better mechanical properties and enhanced wear, oxidation and heat resistance. When employed as a filter material, the SiO2/(PTFE/PEI)10/PPS composite filter medium exhibited excellent filtration performance for fine particulate. The PM2.5 (particulate matter less than 2.5 μm) filtration efficiency reached up to 99.55%. The superior filtration efficiency possessed by the SiO2/(PTFE/PEI)10/PPS composite filter medium was due to the uniformly modified PTFE layers, which played a dual role in fine particulate filtration. On the one hand, the PTFE layers not only increase the specific surface area and pore volume of the composite filter material but also narrow the spaces between the fibers, which were conducive to forming the dust cake quickly, resulting in intercepting the fine particles more efficiently than the pure PPS filter medium. On the other hand, the PTFE layers have low surface energy, which is in favor of the detachment of dust cake during pulse-jet cleaning, showing superior reusability. Thanks to the three-dimensional network structures of the SiO2/(PTFE/PEI)10/PPS composite filter medium, the pressure drop during filtration was low.

Nanoscale ◽  
2013 ◽  
Vol 5 (13) ◽  
pp. 6181 ◽  
Author(s):  
Yuguang Jin ◽  
Yingying Zhang ◽  
Qiang Zhang ◽  
Rufan Zhang ◽  
Peng Li ◽  
...  

MRS Bulletin ◽  
2000 ◽  
Vol 25 (11) ◽  
pp. 33-40 ◽  
Author(s):  
Arthur J. Epstein

Molecule-based magnets display the full range of phenomena observed in conventional transition-metal and rareearth-based magnets, as well as unusual phenomena unique to themselves. These materials form in a wide range of one-, two-, and three-dimensional network structures, with disorder often playing a substantial role.


ChemPlusChem ◽  
2017 ◽  
Vol 82 (11) ◽  
pp. 1341-1350 ◽  
Author(s):  
Carmelo Sgarlata ◽  
Giovanna Brancatelli ◽  
Cosimo G. Fortuna ◽  
Domenico Sciotto ◽  
Silvano Geremia ◽  
...  

2009 ◽  
Vol 34 (2) ◽  
pp. 339-342
Author(s):  
Masayoshi Ojima ◽  
Takeshi Noma ◽  
Hiroaki Asagi ◽  
Akihiko Fujii ◽  
Masanori Ozaki ◽  
...  

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
Seng Fatt Liew ◽  
Jin-Kyu Yang ◽  
Heeso Noh ◽  
Carl F. Schreck ◽  
Eric R. Dufresne ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document