Synthesis and characterization of polyaniline–maleic acid salt

Samui, A. B.; Patankar, A.; Satpute, R. S.; Deb, Pritam

doi:10.1016/s0379-6779(01)00487-8

Cited by 26 publications

(14 citation statements)

References 29 publications

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“…Both nitrogen content and color showed fast polyaniline formation by benzoyl peroxide oxidation and is in tune with the findings of Palaniappan 14. We also carried out a few experiments using aqueous potassium persulfate for oxidative polymerization of aniline in the beads 15. Even though there was indication of encapsulation, the rate and extent of encapsulation were relatively low and inconsistent.…”

Section: Resultssupporting

confidence: 81%

“…In contrast styrene‐divinyl benzene sulfonic acid (SDVBSA) beads contained as high as 1.4% nitrogen indicating about 9% polyaniline encapsulation. It has been shown earlier that polyaniline exists in doped form in presence of maleic and other organic acids15–18 and the same is expected in the copolymer beads where the acid exists in the form of substituted succinic acid. Both nitrogen content and color showed fast polyaniline formation by benzoyl peroxide oxidation and is in tune with the findings of Palaniappan 14.…”

Section: Resultsmentioning

confidence: 56%

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Bactericidal Properties of Flat Surfaces and Nanoparticles Derivatized with Alkylated Polyethylenimines

Lin

Qiu

Lewis

et al. 2002

Biotechnology Progress

240

219

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We previously discovered that covalently coating glass and plastic slides with certain long poly(vinyl-N-alkylpyridinium) chains enables the resultant surfaces to kill a variety of airborne and waterborne bacteria on contact. In the present study, these findings have been extended to an unrelated polymer class, polyethylenimines (PEIs). Alkylated PEIs attached to flat macroscopic surfaces and to those of nanoparticles make these materials highly bactericidal toward both Gram-positive and Gram-negative pathogenic bacteria. Systematic chemical modifications of the immobilized PEI conducted herein shed light on the relationship between the structure of the polymer and the antibacterial efficiency of the resultant coating.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 56%

Bactericidal Properties of Flat Surfaces and Nanoparticles Derivatized with Alkylated Polyethylenimines

Lin

Qiu

Lewis

et al. 2002

Biotechnology Progress

240

219

View full text Add to dashboard Cite

show abstract

“…Decreased yield in HNO 3 at the concentrations higher than 2 m is attributed to oxidative degradation of the PAN chains by concentrated HNO 3 . [15,16] The polymerization yields in 1 m HNO 3 and 0.5 m H 2 SO 4 are nearly the same (up to 79 %) and slightly higher than that in 1 m HCl ( Table 1).…”

Section: Resultsmentioning

confidence: 91%

Facile High‐Yield Synthesis of Polyaniline Nanosticks with Intrinsic Stability and Electrical Conductivity

Huang

2008

Chemistry A European J

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Chemical oxidative polymerization at 15 degrees C was used for the simple and productive synthesis of polyaniline (PAN) nanosticks. The effect of polymerization media on the yield, size, stability, and electrical conductivity of the PAN nanosticks was studied by changing the concentration and nature of the acid medium and oxidant and by introducing organic solvent. Molecular and supramolecular structure, size, and size distribution of the PAN nanosticks were characterized by UV/Vis and IR spectroscopy, X-ray diffraction, laser particle-size analysis, and transmission electron microscopy. Introduction of organic solvent is advantageous for enhancing the yield of PAN nanosticks but disadvantageous for formation of PAN nanosticks with small size and high conductivity. The concentration and nature of the acid medium have a major influence on the polymerization yield and conductivity of the nanosized PAN. The average diameter and length of PAN nanosticks produced with 2 M HNO(3) and 0.5 M H(2)SO(4) as acid media are about 40 and 300 nm, respectively. The PAN nanosticks obtained in an optimal medium (i.e., 2 M HNO(3)) exhibit the highest conductivity of 2.23 S cm(-1) and the highest yield of 80.7 %. A mechanism of formation of nanosticks instead of nanoparticles is proposed. Nanocomposite films of the PAN nanosticks with poly(vinyl alcohol) show a low percolation threshold of 0.2 wt %, at which the film retains almost the same transparency and strength as pure poly(vinyl alcohol) but 262 000 times the conductivity of pure poly(vinyl alcohol) film. The present synthesis of PAN nanosticks requires no external stabilizer and provides a facile and direct route for fabrication of PAN nanosticks with high yield, controllable size, intrinsic self-stability, strong redispersibility, high purity, and optimizable conductivity.

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“…The peak at 1502 cm −1 is attributed to benzenoid ring. A strong peak at 1297 cm −1 is characteristic of BCN stretching mode 37. The peaks observed at 810 and 760 cm −1 are characteristic of a p ‐ and o ‐, or m ‐substituted aromatic ring, respectively.…”

Section: Resultsmentioning

confidence: 98%

Preparation and characterization of polyfuran/poly(2‐fluoroaniline) conducting composites

Gök

Sarı

Talu

2004

J Polym Sci B Polym Phys

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This article deals with the chemical synthesis and characterization of poly(2-fluoroaniline) (P2FAn) and polyfuran (PFu) homopolymers and PFu/P2FAn and P2FAn/PFu composites. P2FAn and PFu homopolymers were synthesized using ammonium persulfate and antimony (III) chloride as catalyst, respectively. These homopolymers and composites were studied in the doped state using Fourier transform infrared spectroscopy and ultraviolet-visible absorption spectroscopy, thermogravimetric analysis, scanning electron microscopy, four-probe conductivity technique, and Gouy Scale measurements. PFu/P2FAn and P2FAn/PFu composites were found to possess different thermal, conductivity, electronic, and morphological properties from each other when synthesis order of guest and host polymers was varied.

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Synthesis and characterization of polyaniline–maleic acid salt

Cited by 26 publications

References 29 publications

Bactericidal Properties of Flat Surfaces and Nanoparticles Derivatized with Alkylated Polyethylenimines

Bactericidal Properties of Flat Surfaces and Nanoparticles Derivatized with Alkylated Polyethylenimines

Facile High‐Yield Synthesis of Polyaniline Nanosticks with Intrinsic Stability and Electrical Conductivity

Preparation and characterization of polyfuran/poly(2‐fluoroaniline) conducting composites

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