A nanobursa mesh: a graded electrospun nanofiber mesh with metal nanoparticles on carbon nanotubes

Abstract

A new type of material, a "nanobursa" mesh (from "bursa" meaning "sac or pouch"), is introduced. This material consists of sequential layers of porous polymeric nanofibers encapsulating carbon nanotubes, which are functionalized with different metal nanoparticles in each layer. The nanobursa mesh is fabricated via a novel combination of twin-screw extrusion and electrospinning. Use of this hybrid process at industrially-relevant rates is demonstrated by producing a nanobursa mesh with graded layers of Pd, Co, Ag, and Pt nanoparticles. The potential use of the fabricated nanobursa mesh is illustrated by modeling of catalytic hydrocarbon oxidation.

Synergetic Catalytic Effect of Cu2–xSe Nanoparticles and Reduced Graphene Oxide Coembedded in Electrospun Nanofibers for the Reduction of a Typical Refractory Organic Compound

“…Electrospinning has been recognized as one of the most outstanding and versatile techniques to prepare nonwoven, continuous, and functional nanofibers with diameters ranging from nanometers to a few micrometers. − For improving the functionality and wide application of electrospun nanofibers, exciting methods including doping of various functional molecules into nanofibers and modification of the as-prepared nanofibers were adopted and further applied in numerous fields such as sensing, ,− separation through filtering and adsorption, , energy and environment, , smart materials and imaging, , and biomedicine. , One of the most remarkable and straightforward advantages of electrospinning is that the electrospun nanofibers can be applied in catalytic fields because (1) the electrospun polymer nanofibers could prevent functional molecules or NPs immobilized on them from aggregating and the catalytic components could be further preserved, , (2) the large surface area to volume ratio and high porosity could provide catalytic reactions with an adequate space, , and (3) the nanofibrous morphology and excellent mechanical properties are superior to those of individual NPs because of their recyclability, reusability, and environmental friendliness . Therefore, developing a new composite of electrospun nanofibers as catalysts for the reduction of refractory organic compounds such as 4-nitrophenol (4-NP) may generate more upsurges in the area of environmental treatment.…”

Distributive mixing of carbon nanotubes in poly(caprolactone) via solution and melt processing: Viscoelasticity and crystallization behavior versus mixing indices

“…PCL is used widely in the biomedical field for sutures, dental fillings and for controlled release and implantation and can be shaped into tissue engineering scaffolds upon compounding with various nanoinclusions and bioactives . ‐ PCL can also be compounded with nanotubes that are functionalized with different catalyst nanoparticles to be electrospun into graded catalyst supports …”

Nanoporous nanocomposite membranes via hybrid twin-screw extrusion—multijet electrospinning

“…The hybrid twin screw extrusion/electrospinning process setup that is used for the fabrication of the electrospun PCL/ CNT membranes is shown in figure 2. The process principally consists of a twin screw extruder with fully-intermeshing and co-rotating twin screws of 7.5 mm diameter and a spinneret die with multiple parallel channels connected to needleshaped nozzles [50].…”