Synthesis, characterization and antimicrobial activity of biodegradable conducting polypyrrole-graft-chitosan copolymer

Çabuk, Mehmet; Alan, Yusuf; Yavuz, Mustafa; Ünal, Halíl Íbrahím

doi:10.1016/j.apsusc.2014.02.180

Cited by 85 publications

(50 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All investigated samples display antibacterial activity against both bacteria, where PPy/Cs nanocomposites exhibited much better antibacterial activity compared with both neat Cs and PPy‐NPs. The improved antibacterial activity of PPy/Cs nanocomposites is ascribed to the synergistic effect of both protonated amino groups of Cs and positively charged PPy chains, which facilitates the sustained release of ions into the nutrient media and in turn enhances the antibacterial activity …”

Section: Resultsmentioning

confidence: 99%

Structure and dynamics of polypyrrole/chitosan nanocomposites

Ali

Elmahdy

Sarhan

et al. 2018

Polymer International

View full text Add to dashboard Cite

Polypyrrole/chitosan (PPy/Cs) nanocomposites with various amounts of polypyrrole nanoparticles (PPy‐NPs) have been synthesized and afterwards exposed to UV irradiation for 240 min. Structure, dynamics and antibacterial activity of pure compounds and the corresponding nanocomposites were investigated by means of wide‐angle X‐ray scattering, Fourier transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, broadband dielectric spectroscopy and antibacterial activity assay. The occurrence of a pronounced interaction between PPy‐NPs and Cs has been verified. Broadband dielectric spectroscopy measurements revealed two relaxation processes at low and high frequencies. The low‐frequency α‐relaxation associated with the glass–rubber transition is attributed to the presence of hydrogen‐bonded water (plasticizing effect) appearing at low temperature (<373 K). The high‐frequency σ‐relaxation is related to water molecules which become desorbed upon heating at T > 373 K and demonstrates Arrhenius temperature dependence with activation energy in the range 70–90 kJ mol−1 in good agreement with previous reports. On the contrary, PPy‐NPs do not show any structural relaxation process and the charge transport mechanism follows the correlated barrier hopping model. All PPy/Cs nanocomposites exhibit an improved antibacterial activity against both Staphylococcus aureus and Escherichia coli bacteria as compared with pure Cs and PPy‐NPs. © 2018 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

Structure and dynamics of polypyrrole/chitosan nanocomposites

Ali

Elmahdy

Sarhan

et al. 2018

Polymer International

View full text Add to dashboard Cite

show abstract

“…Furthermore, considerable attention has been focused on the copolymers, due to their amazing electrical, physical, and electrochemical characteristics [28][29][30][31][32][33][34][35]. Recently, chemical copolymerization of formyl pyrrole (FPy) and pyrrole (Py) using acidic catalysts in the copolymerization was reported [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Morphology and electrical properties of electrochemically synthesized pyrrole–formyl pyrrole copolymer

Gholami

Nia

Alias

2015

Applied Surface Science

View full text Add to dashboard Cite

“…PPy can be easily synthesized using various chemical or electrochemical methods . Moreover, PPy can be modified by incorporation of various co‐monomers or substituents . The substitution of the PPy backbone by ionizable (butyric acid) or hydrolysable (butyric ester) side groups has been reported to have the potential to bestow erodibility, a term coined to differentiate between different decomposition pathways involving degradation and sparing (erosion) of the principal macromolecular backbone of polymeric materials of various molecular weights .…”

Section: Introductionmentioning

confidence: 99%

N‐Oligo(3‐hydroxybutyrate)‐functionalized polypyrroles: towards bio‐erodible conducting copolymers

Domagala

Domagała

Ledwon

et al. 2016

Polymer International

View full text Add to dashboard Cite

New copolymer materials have been prepared by chemical grafting of 3-hydroxybutyric acid oligomers (OHB) onto polypyrrole (PPy) derivatives. The influence of different grafting density and molecular weight of OHB brushes on physicochemical properties of prepared copolymers was investigated. Polypyrrole substrates were prepared by FeCl 3 driven oxidative homopolymerization of N-(2-carboxyethyl)pyrrole or its copolymerization with pyrrole. The grafting method employed involved controlled anionic polymerization of β-butyrolactone on pyrrole tethered potassium carboxylate active sites.Obtained polypyrrole-g-OHB copolymers of varying grafting density and pendant polyester chain length were characterized and the observed structure -property relationships discussed.The impact of real time exposure in phosphate buffered saline environment was investigated and the residue products were characterized. Cross-correlation of spectroscopic, thermal, electrical and elemental analysis data afforded comprehensive evaluation of the structure of the prepared materials and their behavior in hydrolytic medium. Erosion and degradation pathways have been identified indicating ways to consciously tailor the physicochemical properties of these new biomimetic materials.

show abstract

Synthesis, characterization and antimicrobial activity of biodegradable conducting polypyrrole-graft-chitosan copolymer

Cited by 85 publications

References 25 publications

Structure and dynamics of polypyrrole/chitosan nanocomposites

Structure and dynamics of polypyrrole/chitosan nanocomposites

Morphology and electrical properties of electrochemically synthesized pyrrole–formyl pyrrole copolymer

N‐Oligo(3‐hydroxybutyrate)‐functionalized polypyrroles: towards bio‐erodible conducting copolymers

Contact Info

Product

Resources

About