Preparation and characterization of polypyrrole/dextran sulphate composite: its electrochemical and thermal behaviors

Abstract

Polypyrrole/dextran sulphate (PPy/Dx-SO 4 ) composite was synthesized in 1 M HCl medium by chemical polymerization method. The synthesized composite was characterized using 1 H-NMR, UV-Vis, FT-IR, SEM micrographs, cyclic voltammetry, TG-DTA and viscosity measurements. The SEM micrographs were clearly indicated that PPy, Dx-SO 4 and PPy/Dx-SO 4 composite have different morphology. The composite architecture is also seen alike as globular and agglomerate particles. The composite has better thermal stability than Dx-SO 4 . The results of the solubility studies indicated that the composite partially dissolved in DMSO, DMF, and NMP. Additionally, the composite was more soluble in these solvents than PPy, providing technological usefulness. The electrochemical studies showed that PPy/Dx-SO 4 composite has low electrical conductivity, but it has good electrochemical stability than PPy.

Polipirol/dekstran kompozit filminin platin elektrot yüzeyine elektrokimyasal sentezi ve karakterizasyonu

“…3127 cm -1 bölgesinde N-H gerilmelerinden kaynaklanan geniş ve keskin bir pik polipirol spektrumunda ortaya çıkmaktadır. Ayrıca 1599 cm -1 dolaylarındaki pik polipirol halkasındaki C=C [18] ve 1410 cm -1 bölgesindeki pik ise C-H [19] gerilmelerinden kaynaklanmaktadır. 1312 cm -1 civarında görülen C-N gerilmelerine ait keskin pik ile 1021 cm -1 dolaylarında görülen pik bozulmuş polipirol halkalarına aittir.…”

Flexible Janus nanoribbons to help obtain simultaneous color-tunable enhanced photoluminescence, magnetism and electrical conduction trifunctionality

“…17 Polyaniline (PANI) is one of the best known conducting polymers due to its good environmental and thermal stability, fairly excellent processability and electrical conductivity. 18 However, it remains a great challenge to apply electrospinning to PANI as limited by its molecular weight and solubility. To circumvent this problem, most of the researchers electrospun PANI through mixing it with other spinnable polymers.…”