Nanofibre nonwovens membrane

Cellulose acetate nanofibers reinforced with chopped polyaniline, PANI, nanoparticles were produced. PANI acts as a nucleating agent and increases the formation of crystallites. The overall degree of ciystalhzation is increased, leading to the increased number of dipoles in the nanofibrous nonwoven membranes. ... 

Microfibers are fiequently used to enhance filtration efficiency of nonwoven fabrics, and nanofibrous nonwovens are frequently used in combination with membrane filtrations for the filtration of nanoscale particles. 

In the past 10 years, electrospun nanofibrous membranes have been spotlighted as an effective filter media to capture fine particles. In addition to the basic studies of electrospinning process to better understand the membrane construction process, researchers from all over the world focus on the study of the relationships between the structure characteristics of electrospun nanofibrous membranes (fiber diameter, pore size, porosity, surface area, etc.) and filtration performances (filtration efficiency, pressure, air permeability, etc.). In this chapter, recent advances in fabricating nanofibrous filter media via electrospinning process have been reviewed. In particular, filtration performances and relevant mechanical properties are discussed in detail. It is interesting that the electrospun nanofibrous membranes have been able to outperform conventional nonwoven membranes fabricated essentially by using the meltblown or spunbonded process. 

To focus on the topic, in the next sections, the general term nanoelectrochemistry will be whittled down to the study of conductive surfaces coated with material having one or more external dimensions in the nanoscale and the apphcations will be limited to electrochemical sensors and biosensors modified with nonwoven nanofibrous membranes prepared by electrospinning. 

Scampicchio, M., Bulbarello, A., Arecchi, A., Cosio, M.S., Benedetti, S., Mannino, S.2012. Electrospun nonwoven nanofibrous membranes for sensors and biosQnsotsElectroanalysiylA,A, 719-725. 

Yung and co-workers demonstrated a TENC membrane as NF filters [91]. The investigated TFNC membranes contained an electrospun PES nanofibrous scaffold as the mid-layer, a PET nonwoven as the mechanical support, and an ultrathin highly cross-linked amine polymer layer, formed by interfacial polymerization, as the barrier layer. By optimizing the interfacial polymerization of top barrier... 

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