Synthesis, characterization, and colloidal properties of polythiophene/borax conducting composite

Abstract

In this study, synthesis of polythiophene (PT) and polythiophene/borax pentahydrate (PT/borax) conducting composite were carried out by in‐situ oxidative polymerization. The composite was subjected to various characterization techniques namely: FTIR, particle size, magnetic susceptibility, density, conductivity, dielectric, TGA, XRD, SEM, and zeta (ζ)‐potential measurements. The effects of time, pH, various surfactants, electrolytes and temperature on the ζ‐potential of PT and PT/borax composite were investigated. In a basic medium the ζ‐potential of the composite was observed to decrease up to ζ = −66.5 mV. The most effective surfactant on the ζ‐potential of the composite was sodium dodecyl sulfate, which reduced the value of ζ‐potential to ζ = −39.2 mV. It was concluded that the presence of mono‐valent (NaCl) salt has no impact on ζ‐potential whereas, di‐valent (BaCl2) salt shifted the ζ‐potential value to more positive regions. Elevated temperatures caused almost no change on the ζ‐potential of the composite. Also an electrorheological effect (a tremendous viscosity increase) was determined from the PT/borax colloidal systems under an externally applied electric field, and the results obtained will be discussed in the forthcoming article. POLYM. COMPOS., 2011. © 2010 Society of Plastics Engineers

Electrokinetic and electrorheological properties of poly(vinyl chloride)/polyindole conducting composites

“…Also, the IEP values of K49 (aq) dispersions were observed to shift to more basic regions with increasing ionic strength of the cations present in the dispersion medium. Similar behaviors are reported in the literature for PT/borax composite system …”

“…Similar behaviors are reported in the literature for PT/borax composite system. [25] On the other hand, when the effect of monovalent Cl À À Á and divalent ðSO 2-4 Þ anions on the z-potential values of K49 (aq) dispersions were considered, by the addition of H 3 O + cations into the dispersion medium, z-potential values were observed to shift to the more positive regions, as expected ( Fig. 2(b)).…”

The effect of anionic surfactant on the properties of polythiophene/chitosan composites

“…A diffraction peak that belong to intermolecular π–π* stacking structure and amorphous packing of the prepared polythiophenes of PT is observed at 2 θ =15–30 (Fig. a) . A broad and weak diffraction peak is observed for a known and amorphous PT .…”

A Comparative Study on Electrokinetic Properties of Boronic Acid Derivative Polymers in Aqueous and Nonaqueous Media

“…On the other hand, almost no change was observed for PTBA which was started from −41 mV at 20 °C and ended up with −37 mV at 65 °C. This enhancement in ζ ‐potential of PABA with rising temperature may be attributed to the decrease in the κ −1 , decrease in the medium viscosity and changing equilibrium between H 2 O molecules and the ionized groups . Different behaviors of PABA and PTBA dispersions with temperature may stem from the Brownian motions.…”