Preparation and characterization of electrospun polyurethane–polypyrrole nanofibers and films

Abstract

Polyurethane (PU)-polypyrrole (PPy) composite films and nanofibers were successfully prepared for the purpose of combining the properties of PU and PPy. Pyrrole (Py) monomer was polymerized and dispersed uniformly throughout the PU matrix by means of oxidative polymerization with cerium(IV) [ceric ammonium nitrate Ce(IV)] in dimethylformamide. Films and nanofibers were prepared with this solution. The effects of the PPy content on the thermal, mechanical, dielectric, and morphological properties of the composites were investigated with differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), Fourier transform infrared (FTIR)-attenuated total reflection (ATR) spectroscopy, dielectric spectrometry, and scanning electron microscopy. The Young's modulus and glass-transition temperatures of the composites exhibited an increasing trend with increases in the initially added amount of Py. The electrical conductivities of the composite films and nanofibers increased. The crystallinity of the composites were followed with DSC, the mechanical properties were followed with DMA, and the spectroscopic results were followed with FTIR-ATR spectroscopy. In the composite films, a new absorption band located at about 1650 cm À1 appeared, and its intensity improved with the addition of Py. The studied composites show potential for promising applications in advanced electronic devices.

Novel electrically conductive polyurethane/montmorillonite-polypyrrole nanocomposites

“…Among ICPs, polypyrrole (PPy) is a particularly promising material because of its high electrical conductivity, chemical and environmental stability in the oxidized state, low ionization potential, electrorheological properties, electrochromic effect and relatively easy of synthesis [1][2][3][4][5][6]. In fact, PPy can be potentially used in new advanced technology areas, including electronic and optoelectronic nanodevices [7], sensors [8][9][10][11][12][13], supercapacitors [14,15], energy storage devices [1,7,16], surface coatings for corrosion protection [17], electromagnetic shielding applications [18][19][20], smart textiles [21,22] and even in medical applications [4,[23][24][25][26].…”

“…In fact, PPy can be potentially used in new advanced technology areas, including electronic and optoelectronic nanodevices [7], sensors [8][9][10][11][12][13], supercapacitors [14,15], energy storage devices [1,7,16], surface coatings for corrosion protection [17], electromagnetic shielding applications [18][19][20], smart textiles [21,22] and even in medical applications [4,[23][24][25][26]. However, the poor mechanical performances and the difficult processability (insolubility and infusibility) [2,3,19,20,27,28] have hampered the use of PPy for technological applications. Intensive investigations have been carried out to solve these problems.…”

From wheat bran derived carbonaceous materials to a highly stretchable and durable strain sensor

“…5 To date, the major type of stretchable strain sensors is the composite material combining a conductive ller and exible matrix elastomer, in which the sensing performance is highly inuenced by the interaction between the elastomer matrix and ller materials. [6][7][8][9] Weak interactions always cause peeling of the llers and cracking of sensors under stretching.…”

Synthesis and characterization of a poly-tetraaniline-urethane/Ag-nanowire or/graphene conductive elastomer

“…However, the elasticity was considerably reduced because of the heavy loading of additives [9]. Wang et al compounded up to 6 wt.% of multiwall carbon nano tube (MWCNT) into PU to produce a PU film that comprised the electrical conductivity of 3×10 −5 S/cm [10].…”