Wet-electrospun CuNP/carbon nanofibril composites: potential application for micro surface-mounted components

Abstract

Wet electrospinning of polyacrylonitrile (PAN) and dimethylformamide (DMF) with copper nanoparticles (CuNP) at different concentrations from 0.2 to 1 wt% have been studied under certain spinning conditions. A specific coagulating water bath has been used to collect different fibroses and fibril diameters, the effect of spinning height on the produced nanofiber and CuNP/PAN nanofibril composites have been studied from 1 to 7 cm heights. A minimum average diameter of 64 nm has been reported at 7-cm spinning height. Two heat treatment steps have been used to enhance the electrical properties of CuNP/PAN nanofibril composites. SEM has been used to study the morphological characteristics of the electrospun nanofibroses membranes. Preliminary electrical measurements using 4-point probing system showed a noticeable improvement in the electrical conductivity of the produced nanofibril composite membranes. Also, electrical property of a single CuNP/carbon nanofibril composite has been theoretically calculated based on Lichtenecker formula. The produced membranes have been used to build a micro surface-mounted components (MSMC) such as Micro Field Effect Transistor (MFET). A high transconductance has been reported for such a device which will open the door for many promising applications especially in Electronics and Biomedicine.

Study of polycaprolactone wet electrospinning process

“…The modification is based on the usage of a liquid collector instead of a solid, mostly metallic one. Wet electrospinning was first introduced in [1,2] as a method for the lab-scale production of nanofibrous scaffolds for tissue engineering. To produce bulky and fluffy material using the common electrospinning method is a tricky matter.…”

Mechanical and Thermal Characteristics of Optimized Electrospun Nylon 6,6 Nanofibers by Using Taguchi Method

“…The amount to be used with the capillary viscometer should be at least 6 ml. So the amount of solution prepared should be adjusted for all concentrations to be 6 ml, where: 1dl ¼ 10 À1 l or 100 cm 3 . The measured time versus concentration for each solvent, polymer molecular weight and the ratio sp =C are recorded in Tables 1-5.…”

“…In the electrospinning process, high strength, low weight and low porosity can be achieved along with tailored surface functionality, depending on the polymer type and polymer nanobers with a wide range of properties, such as electrical conductivity. [2][3][4][5][6] In the electrospinning process, the electric body force acts on an element of charged°uid. Due to their high speci¯c surface area, high porosity, and small pore size, the unique¯bers have been suggested as excellent candidates for use in¯ltration, [6][7][8][9][10][11] tissue engineering, [12][13][14] manufacture of protective clothing, pharmacy and functional materials.…”

Electrospun Ceramic Nanofiber Mats Today: Synthesis, Properties, and Applications

“…It is worth mentioning that not only ceramic NPs are used inside the polymer NFs but also metallic NPs are assigned inside the polymer NFs for desired applications. For example, Pt, Cu and Sn NPs are added in the fabrication of PVP/metal NFs for direct ethanol protonic ceramic fuel cell application [19], or for micro surface-mounted components [20]. Similar to the ceramic NFs fabrication procedure, metal NFs can be obtained by heat treatment but at lower temperatures.…”

“…Similar to the ceramic NFs fabrication procedure, metal NFs can be obtained by heat treatment but at lower temperatures. Pt, Sn, and Cu, metal NFs are obtained by calcination of as-spun fibrous mats at 300–450 °C after evaporation of polymer reagents [19,20] (See Figure 4). …”