Porous membrane controlled polymerization of nanofibers of polyaniline and its derivatives

Chiou, Nan Rong; Lee, L. James; Epstein, Arthur J.

doi:10.1039/b719320c

Cited by 23 publications

(18 citation statements)

References 23 publications

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“…Adsorption of aniline vapor into the dehydrated host, followed by reaction with peroxydisulfate, led to encapsulated PANI-NFs in the protonated emeraldine salt form, with chain lengths of several hundred aniline rings. PANI-NFs with lengths from sub-micrometre to several micrometres and with diameters 20-250 nm were formed via the selection of pore diameter, monomer, counterions, and synthetic conditions [49]. PANI-NFs with lengths from sub-micrometre to several micrometres and with diameters 20-250 nm were formed via the selection of pore diameter, monomer, counterions, and synthetic conditions [49].…”

Section: Hard (Physical) Template Methodsmentioning

confidence: 99%

Polyaniline Nanostructures

Ćirić‐Marjanović

2010

Nanostructured Conductive Polymers

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Polyaniline (PANI) is one of the most extensively studied conducting polymers because of its simple synthesis [1] and doping/dedoping chemistry [2], low cost, high conductivity, and excellent environmental stability. PANI has a wide applicability in rechargeable batteries [3], erasable optical information storage [4], shielding of electromagnetic interference [5], microwave-and radar-absorbing materials [6], sensors [7], indicators [8], catalysts [9], electronic and bioelectronic components [10], membranes [11], electrochemical capacitors [12], electrochromic devices [13], nonlinear optical [14] and light-emitting devices [15], electromechanical actuators [16], antistatic [17] and anticorrosion coatings [18]. Its electromagnetic and optical properties depend mostly on its oxidation state and degree of protonation [19]. The green emeraldine salt form of PANI is conducting ($1-10 S cm À1 for granular powders) [1]. It contains, depending on the synthetic route, variousunits (in the preceeding formulae B, Q and A À denote a benzenoid ring, quinonoid ring and dopant anion, respectively). The blue emer-The preparation of bulk quantities of conducting granular PANI is usually performed Nanostructured Conductive PolymersEdited by Ali Eftekhari by the oxidative polymerization of aniline with ammonium peroxydisulfate (APS) in an acidic aqueous solution (initial pH < 2.0) [1]. Colloidal PANI nanoparticles are prepared by dispersion polymerization of aniline in the presence of various colloidal stabilizers [20,21]. The average size of colloidal PANI nanoparticles decreases with increasing stabilizer/aniline ratio. PANI colloids often have nonspherical (rice grain, needle-like, etc.) core-shell morphology. The colloidal nanoparticle core most likely has a composite nature, i.e. it is composed of both the PANI and the incorporated stabilizer, while the shell is formed by the stabilizer. Nowadays, conducting PANI nanostructures are the focus of intense research owing to their significantly enhanced dispersibility and processability, and substantially improved performance in many applications, in comparison with granular and colloidal PANI [22][23][24][25][26][27]. The continuously growing interest in the study of zero-dimensional (0-D) (solid nanospheres), one-dimensional (1-D) (nanofibers (nanowires), nanorods (nanosticks), nanoneedles, rice-like nanostructures, nanotubes), two-dimensional (2-D) (nanoribbons (nanobelts), nanosheets (nanoplates, nanoflakes, nanodisks, leaf-like nanostructures), nanorings (cyclic nanostructures), net-like nanostructures), and three-dimensional (3-D) PANI nanostructures (hollow nanospheres, dendritic and polyhedral nanoparticles, flower-like, rhizoid-like, brain-like, urchin-like, and star-like nanostructures, etc.) has dramatically increased in recent years (Figure 2.1). The major focus of research has been the preparation, characterization, processing, and application of PANI nanofibers (PANI-NFs) and nanotubes (PANI-NTs). PANI-NFs are 1-D PANI nanoobjects of cylindrical profile with diameters ...

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Section: Hard (Physical) Template Methodsmentioning

confidence: 99%

Polyaniline Nanostructures

Ćirić‐Marjanović

2010

Nanostructured Conductive Polymers

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“…This low temperature change interfacial energy between a soft template and aniline monomers [13,14]. Besides, the robust researches had interested the shape controlling of obtained nanofibers as a function of surface features [15,16]. In accordance, the varying number of surface chemical groups would behave in different manner.…”

Section: Introductionmentioning

confidence: 98%

Detailed mechanism of aniline nucleation into more conductive nanofibers

et al. 2015

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“…[6,7] Modification with PANI in the polystyrene (PS) membrane is to distinguish the phases. [8,9] It was observed that PANI gets accumulated at particular sites in the matrix of the polystyrene.…”

Section: Introductionmentioning

confidence: 98%

Optical and Structural Study of Polyaniline/Polystyrene Composite Films

Kumar

Jangir

Kumari

et al. 2015

Macromolecular Symposia

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Summary: Polyaniline (PANI) was synthesized by oxidative polymerization method using potassium dichromate (K 2 Cr 2 O 7 ) as an oxidising agent. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) results confirm the emerlandine salt formation of PANI. Polystyrene and PANI based composites were prepared by solution cast method. Ultraviolet-visible spectrophotometry (UV-Vis) results of polymer composite film in the range of 200-400 nm indicate the interaction between neighbouring phenyl groups. Structural properties of the composite films were determined by the Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Morphological changes of PS-PANI film were investigated by scanning electron microscopy (SEM) and optical micrographs.

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Porous membrane controlled polymerization of nanofibers of polyaniline and its derivatives

Cited by 23 publications

References 23 publications

Polyaniline Nanostructures

Polyaniline Nanostructures

Detailed mechanism of aniline nucleation into more conductive nanofibers

Optical and Structural Study of Polyaniline/Polystyrene Composite Films

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