Conducting polymer interaction with gaseous substances II. PANI-H2O, PANI-NH3

Lubentsov, B.Z.; Timofeeva, O.N.; Khidekel, M. L.

doi:10.1016/0379-6779(91)91808-n

Cited by 83 publications

(47 citation statements)

References 7 publications

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“…EAPU2 showed two oxidation peaks at 0.40 and 0.72 V. The former was assigned to the transition from leucoemeraldine to emeraldine oxidation state, and the latter was corresponded to the transition from emeraldine to pernigraniline oxidation state of AT segments. The effect of water on the electrical properties of doped thin polyaniline lms was studied by Lubentsov et al 57 They found that the conductivity was increased when water vapor adsorption took place and they also mentioned that doped polyaniline was found to adsorb greater amount of water as compared with undoped samples. The difference between quantities with similar superscripts is not significant (p $ 0.05)).…”

Section: Electrochemical and Electrical Properties Of Membranesmentioning

confidence: 99%

Aniline tetramer embedded polyurethane/siloxane membranes and their corresponding nanosilver composites as intelligent wound dressing materials

Gharibi¹,

Yeganeh²,

Gholami³

et al. 2014

RSC Adv.

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The preparation of functional intelligent wound dressing membranes with features including: excellent dimensional stability in both dry and hydrated states, preserving a moist environment over the wounded area by self-adjustment of their permeability in response to wound moisture level, a broad spectrum of antimicrobial activity towards different microorganisms, promising antioxidant (radical scavenging) efficiency and significant activity for stimulation of fibroblast cells growth and proliferation is reported in this work. For the preparation of dressing membranes, NCO-terminated polyurethane prepolymers and a CHO-terminated aniline tetramer are functionalized with silane groups. Polyurethane/siloxane networks are prepared through a sol-gel reaction of these components at different weight ratios. The corresponding nanosilver composites are simply prepared by a redox reaction through impregnating the membranes with a silver salt solution. Based on various in vitro tests, it is revealed that some of the prepared membranes have the basic characteristics of ideal dressings, while they can actively alleviate the healing of tissue in the wounded area. View Article Onlinea According to analysis of variances P-values of <0.05 were considered signicant. The difference between quantities with similar superscripts is not signicant (p $ 0.05) for data of each column.This journal is

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Section: Electrochemical and Electrical Properties Of Membranesmentioning

confidence: 99%

Aniline tetramer embedded polyurethane/siloxane membranes and their corresponding nanosilver composites as intelligent wound dressing materials

Gharibi¹,

Yeganeh²,

Gholami³

et al. 2014

RSC Adv.

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show abstract

“…The absorption band at 1030 cm −1 (due to O-H bending), at 1,076 cm −1 (characteristic peaks of a saccharide structure; C-O stretching) and at 830 cm −1 was assigned to aromatic C-H bending vibration band due to the 1,4-disubstituted benzene ring. FTIR spectra of PANI showed the characteristic peaks of the emeraldine salt form of PANI [16].…”

Section: Uv-vis Spectramentioning

confidence: 99%

Synthesis and characterization of pH switching electrical conducting biopolymer hybrids for sensor applications

Tiwari

2008

J Polym Res

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A novel electrically active, water soluble gum acacia-polyaniline (GA-PANI) hybrid was synthesized using ceric ammonium nitrate as initiator in acidic medium. The representative hybrid material was characterized using UV-visible, FTIR and SEM taking polyaniline as reference. The composition of aniline to gum acacia was tailored to optimize possible cross-linking in side the hybrid. The hybrid material exhibited pH switching electrical conductivity, which was decreased with increasing pH of the material. I-V characteristics and acid-base sensitivity of the hybrid material were extensively investigated in order to find out its electronic behavior during current flow.

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“…Lubentsov et al 13 have reported that the electrical properties of thin PANI films were increased when water vapor adsorption took place. They also mentioned that doped PANI was found to adsorb the greater amount of water as compared with undoped samples.…”

Section: Introductionmentioning

confidence: 98%

Effect of water on inorganic acids doped polyaniline

Ayad

Zaki

2009

J of Applied Polymer Sci

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Based on gravimetric measurements, the effect of water on thin films of inorganic acids doped polyaniline (PANI) was developed. The starting point was the fact that PANI coating on the electrode of quartz crystal microbalances (QCM) showed significant frequency shifts under exposure to liquid water. The changes in the frequency as a function of treatment time in water were quantitatively measured. These changes suggested that the mass decreases under water exposure were due to dopant ions release. The data have been collected using doped PANI films with HCl, H 2 SO 4 , and H 3 PO 4 . For PANI-HCl upon immersion in water showed rapid mass loss followed by slow kinetically dopant ions release with time. However, PANI-H 3 PO 4 and PANI-H 2 SO 4 showed a slow kinetically release out of the film immediately upon immersion in water. The release process was well described by Fickian diffusion process. The diffusion coefficients (D) were determined and found to be dependent on the acid dopant utilized. They varied within the range of (1.68-14.7) Â 10 -14 cm 2 /s. This work presented an attempt to find a simple method based on the QCM for investigating the diffusion of dopant ions out of thin PANI films upon immersion in water and determining D. V

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Conducting polymer interaction with gaseous substances II. PANI-H2O, PANI-NH3

Cited by 83 publications

References 7 publications

Aniline tetramer embedded polyurethane/siloxane membranes and their corresponding nanosilver composites as intelligent wound dressing materials

Aniline tetramer embedded polyurethane/siloxane membranes and their corresponding nanosilver composites as intelligent wound dressing materials

Synthesis and characterization of pH switching electrical conducting biopolymer hybrids for sensor applications

Effect of water on inorganic acids doped polyaniline

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