Journal articles: 'Polyaniline'

1

Suwanprateep, Sasikan, Rattachat Mongkolnavin, and Vimolvan Pimpan. "Synthesis of Polyaniline by Pulsed Plasma Polymerization Using Theta-Pinch Device." Advanced Materials Research 488-489 (March 2012): 950–54. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.950.

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Polyaniline was synthesized by pulsed plasma polymerization using a theta-pinch device. The process was done using oxygen plasma at a voltage of 20 kV, a pressure of 2 Pa and a discharging current of 125 kA. The number of the plasma shots was varied from 10, 15, 20, 25, to 30 shots. This parameter significantly affected the chemical structures of the synthesized polyanilines as revealed by FTIR spectra. While all synthesized polyaniline exhibited the characteristic peaks of quinoid ring and benzenoid group, the peaks corresponding to the formation of oxygen containing groups was found when high numbers of plasma shots were employed. This also caused the difference in UV-VIS absorption of these polyanilines. The highest conductivity of polyaniline was obtained when 20 shots of oxygen plasma were used. At this condition, polyaniline had a semi-crystalline structure and the thermal decomposition temperature at 262oC.

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Sljukic, Biljana, Darko Micic, Nikola Cvjeticanin, and Gordana Ciric-Marjanovic. "Nanostructured materials for sensing Pb(II) and Cd(II) ions: Manganese oxohydroxide versus carbonized polyanilines?" Journal of the Serbian Chemical Society 78, no. 11 (2013): 1717–27. http://dx.doi.org/10.2298/jsc130731101s.

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Nanostructured materials including three different carbonized polyanilines and manganese oxyhydroxide were prepared and evaluated as electrode materials for sensing of lead and cadmium ions in aqueous media. Anodic stripping voltammetry results indicated that all prepared materials could be successfully used for determination of these two heavy metal ions. Carbonized polyaniline-based electrodes have higher signal and lower limits of detection (10-7 ?) compared to manganese oxyhydroxide-based electrode. Among the three studied carbonized polyanilines, the one that was derived from polyaniline precursor produced in the presence of 3,5-dinitrosalicyclic acid showed the highest electrocatalytic activity towards the lead and cadmium oxidation.

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Rajender, Boddula, and Srinivasan Palaniappan. "Organic solvent soluble methyltriphenylphosphonium peroxodisulfate: a novel oxidant for the synthesis of polyaniline and the thus prepared polyaniline in high performance supercapacitors." New Journal of Chemistry 39, no. 7 (2015): 5382–88. http://dx.doi.org/10.1039/c5nj00979k.

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Ummami, Riza, Busroni Busroni, and Bambang Piluharto. "Synthesis and Characterization of Bacterial Cellulose-Polyaniline Composite with Variation of Dopant Concentration." BERKALA SAINSTEK 9, no. 2 (July 21, 2021): 69. http://dx.doi.org/10.19184/bst.v9i2.18120.

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Polyaniline is a type of conductive polymer. Bacterial cellulose has high mechanical properties, so it can be made into polyaniline base composite materials. A stable form of polyaniline oxidation at room temperature is emeraldine base. The emeraldine base has a conductivity value of 10-6 S/cm. Dopants can change the shape of emeraldine base to emeraldine salt by protonation process. Emeraldine salt is a conductive form of polyaniline. The conductivity value of emeraldine salt is 0,03-0,07 S/cm. The addition of dopan in synthesis of polymer was carried out to determine its effect on the conductivity value. The disadvantage of polyaniline is that its mechanical properties are weak and easily brittle. Modifications are needed to improve the mechanical properties of polyaniline, one of which is the manufacture of composite. Bacterial celluloce has high mechanical properties so it can be made into polyaniline base composite materials. Synthesis of bacterial cellulose-polyaniline composites by in situ chemical polymerization methods. Syntehsis is started with BC membrane was dipped into aniline solution for about 2h with stirring at room temperature. The BC was immersed into ammonium peroxydisulfate solution for about 30m with stirring. The bacterial cellulose-polyaniline compositions obtained are black color which is characteristic of the emeraldine salt. The highest conductivity value of composite was obtained from the addition of 3,5M HCl dopant which was 4,70x10-4 S/cm. FTIR analysis of composite obtained peak of the characteristic polyanilin was conductive at 1565,92 cm-1 as C=C quinoid ring and 1442,95 cm-1 as C=C benzoid ring.

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Janosevic, Aleksandra, Budimir Marjanovic, Aleksandra Rakic, and Gordana Ciric-Marjanovic. "Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines." Journal of the Serbian Chemical Society 78, no. 11 (2013): 1809–36. http://dx.doi.org/10.2298/jsc130809097j.

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Recent advances in synthesis, characterization and application of the selected conducting/semiconducting and redox-active oligomers and polymers of arylamines are reviewed. A brief historical background of the selected topics is given. The overview of the preparation, structure and properties of polyaniline, substituted polyanilines, especially those obtained by the oxidative polymerization of p-substituted anilines, poly(1-aminonaphthalene) and its derivatives, carbocyclic and heterocyclic polyaryldiamines such as poly(p-phenylenediamine) and polydiaminoacridines, is presented. The mechanism of formation of polyaniline nanostructures is discussed. Recent approaches to the preparation of one-dimensional polyaniline nanostructures are concisely reviewed, with special attention paid to the template-free falling-pH method. Current and potential future applications of oligo/polyarylamines are briefly discussed.

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Liu, Yu Wen, Jing Na Jiang, Wei Zhang, and Dong Xing Ma. "Study on Structure and Electrochemical Performance of LiFePO₄/C Modified by PANI." Advanced Materials Research 512-515 (May 2012): 1079–82. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1079.

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LiFePO4 has attracted broad attention as a promising cathode material for lithium ion batteries. The key issues related to LiFePO4 performance lie on the intrinsic characteristic of poor diffusion of lithium ions through an interface between LiFePO4 and FePO4. To explore the effect of polyaniline on performances, LiFePO4/C cathode materials were prepared via hydrothermal method, using glucose as a carbon source and polyaniline as a modifier. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), galvanostatic charge–discharge test and cyclicvoltammetry (CV). The results show that the olivine-type phase of LiFePO4/C is not changed by polyanilines and LiFePO4/C is composed of relatively large particles of about 400nm and some nano-sized polyaniline particles, which favor the electronic conductivity. The LiFePO4/C cathode material modified by 10% polyaniline has the highest uniformity. It delivers the capacity of 167.9mAh/g at 0.1C, and has good reversibility and high capacity retention.

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7

Xiao, Yaoming, Gaoyi Han, Yanping Li, Miaoyu Li, and Yunzhen Chang. "High performance of Pt-free dye-sensitized solar cells based on two-step electropolymerized polyaniline counter electrodes." J. Mater. Chem. A 2, no. 10 (2014): 3452–60. http://dx.doi.org/10.1039/c3ta14879c.

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Two-step cyclic voltammetry approach is employed to prepare polyaniline nanofibers, which supplies a quick and controllable method to obtain polyanilines with short-branched structure to increase the active surface area.

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8

Yuningsih, Lela Mukmilah, and Yusri Mutia Fauziyah. "Sintesis Komposit Polianilin-Karbon Aktif dari Tongkol Jagung sebagai Elektrolit Padat Pada Baterai." Jurnal Kimia VALENSI 4, no. 2 (November 30, 2018): 119–23. http://dx.doi.org/10.15408/jkv.v4i2.7390.

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The polyaniline-activated carbon composites are synthesized using aniline chemical oxidation polymerization methods as well as variations in carbonization temperature of 800 °C and 1000 °C. The polyaniline-activated carbon composites are characterized by their value of conductivity, functional groups, crystallinity, morphology, composition and electrical quantities by LCR-meter analysis, FTIR, XRD, SEM-EDX and digital multimeters. The conductivity value of composite polyanilin-activated carbon with carbonization temperature of 800°C and 1000 °C are 0.718 S/cm and 1.1003 S/cm. Polyaniline-activated carbon 800 composite and Polyaniline-activated carbon 1000 composite showed absorption bands acoording to PANI. The wave number that appear on PANI-activated carbon 800 composite and PANI-activated carbon 1000 peak is characteristic of PANI where the wave number 1562 cm-1, 1558 cm-1 is the vibration of the C = N and 1479 cm-1, 1475 cm-1is the vibration of the C = C with slacking off the degree of crystallinity PANI-activated carbon 800 i.e. 23.31% and PANI-activated Carbon 1000 i.e. 37.68%. Analysis of surface morphology and composite element content using SEM-EDX shows that particles of polianilin grows on active carbon fiber and free from impurity. The resulting voltage and current both PANI-Carbon 800 and PANI-carbon 1000 are 1.09 volt 19.74 mA and 1.15 Volts 19.98 mA.

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9

Robertson, Julia, James Dalton, Siouxsie Wiles, Marija Gizdavic-Nikolaidis, and Simon Swift. "The tuberculocidal activity of polyaniline and functionalised polyanilines." PeerJ 4 (December 20, 2016): e2795. http://dx.doi.org/10.7717/peerj.2795.

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Tuberculosis is considered a leading cause of death worldwide. More than 95% of cases and deaths occur in low- and middle-income countries. In resource-limited countries, hospitals often lack adequate facilities to manage and isolate patients with infectious tuberculosis (TB), relying instead on personal protective equipment, such as facemasks, to reduce nosocomial transmission of the disease. Facemasks impregnated with an antimicrobial agent may be a cost-effective way of adding an extra level of protection against the spread of TB by reducing the risk of disease transmission. Conducting polymers, such as polyaniline (PANI), and their functionalised derivatives are a novel class of antimicrobial agents with potential as non-leaching additives to provide contamination resistant surfaces. We have investigated the antimicrobial action of PANI and a functionalised derivative, poly-3-aminobenzoic acid (P3ABA), against mycobacteria and have determined the optimal treatment time and concentration to achieve significant knockdown ofMycobacterium smegmatisandMycobacterium tuberculosison an agar surface. Results indicated that P3ABA is a potential candidate for use as an anti-tuberculoid agent in facemasks to reduce TB transmission.

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10

Qiu, Han Xun, Xue Bing Han, Jing Li, Fei Long Qiu, and Jun He Yang. "Microwave Involved Synthesis of Graphene/Polyaniline Nanocomposite with Superior Electrochemical Performance." Journal of Nano Research 46 (March 2017): 212–24. http://dx.doi.org/10.4028/www.scientific.net/jnanor.46.212.

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A microwave irradiation involved process was applied to fabrication of graphene/polyaniline nanocomposite via in-situ polymerization of aniline monomers on graphene sheets. Structure and morphology of composites were characterized through scanning electron microscopy, Raman spectra, X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectra. Electrochemical performances for energy storage applications were examined by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge measurements. Owing to the homogeneous coating of polyanilline on the large surface of graphene, graphene/polyaniline composite-based electrode exhibits remarkably enhanced capacitive behavior with a specific capacitance of 429 F/g at 0.2 A g-1, a good cyclic stability and an excellent conducting behavior, which are much superior to those of individual components of composites. The improved electrochemical behavior of the composite resulting from the irradiation of microwave suggests the promising potentials for supercapacitors.

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11

Nagaraja, Madihally, Geetha Thippeswamy, Sushma Prashanth, Jayadev Pattar, and Mahesh Hampapatna Mahesh. "Synthesis, Structural, Morphological and I-V Characteristics of Polyaniline-MgCl Composite." Materials Science Forum 1048 (January 4, 2022): 141–46. http://dx.doi.org/10.4028/www.scientific.net/msf.1048.141.

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Composite of polyaniline-MgCl has been synthesized using oxidative polymerization method. Synthesized samples were characterized for structural analysis using FTIR and XRD. Morphological studies were carried by SEM micrographs. Current-Voltage (I-V) properties are obtained through Kiethly source meter. FTIR spectrum of polyaniline-MgCl composite indicates all the characteristic peaks of polyaniline. X-ray diffraction patterns represented the amorphous nature of polyaniline-MgCl composite. SEM micrographs confirmed the presence of MgCl particles in polyaniline matrix. I-V characteristics have shown the ohmic type behavior of polyaniline and polyaniline-MgCl composite.

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12

Pauley, B. W. "Polyaniline." IEEE Potentials 19, no. 2 (2000): 7–9. http://dx.doi.org/10.1109/45.839638.

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13

Lee, J. Y., L. H. Ong, and G. K. Chuah. "Thin film polyaniline-polyaniline electrochemical cells." Journal of Applied Electrochemistry 23, no. 10 (October 1993): 1031–38. http://dx.doi.org/10.1007/bf00266125.

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14

Jia, Qing Ming, Shao Yun Shan, Li Hong Jiang, and Ya Ming Wang. "A Effects of Polyaniline Morphologies on Performance for Removal Rhodamine B." Advanced Materials Research 213 (February 2011): 553–56. http://dx.doi.org/10.4028/www.scientific.net/amr.213.553.

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Polyaniline with different morphologies doped by nitric acid were prepared using rapid mixture method. Scanning electron microscopy analysis showed that morphologies of polyaniline can be changed from unequal particles to nanowires with increasing the molar ratio of aniline to ammonium peroxydisulfate. The adsorption of rhodamine B dye was carried out using the polyaniline with different morphologies, and the effect of morphologies was studied. The results proved that adsorption of rhodamine B from aqueous solutions using polyaniline is an effective and economical method, and morphologies of polyaniline obviously affect its adsorption performance. The polyaniline nanowires present the best adsorption performance for removal rhodamine B among polyaniline with the three kinds of morphologies.

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15

LU, JUN, and XIAOPENG ZHAO. "ELECTRORHEOLOGICAL BEHAVIORS OF POLYANILINE-MONTMORILLONITE CLAY NANOCOMPOSITE." International Journal of Modern Physics B 16, no. 17n18 (July 20, 2002): 2521–27. http://dx.doi.org/10.1142/s0217979202012608.

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Polyanilline-montmorillonite nanocomposite (PANI-MMT) particles were synthesized by an emulsion intercalation method and characterized by IR, XRD and TEM spectrometry. TEM showed that the particle's size of MMT-PANI particles was about 100 mm. The dielectric constant of PANI-MMT nanocomposite was increased 2.4 times than that of MMT and 7 times than PANI, the conductivity of PANI-MMT particles was increased was increased 10 times than that of MMT. Meanwhile, the dielectric loss tangent was also increased about 1.36 times than that of PANI. The electrorheological behaviors of the suspensions of PANI-MMT nanocomposite in silicone oil with a 30% weight fraction were investigated under DC electric fields. In 3 kV/mm DC field at room temperature, the yield stress was 8.26 kPa (shear 5 s -1). In 4 kV/mm DC field, the shear strength was 8.30 kPa (γ = 103.1 s -1, T = 20°C), and much higher than that of pure polyaniline (PANI), montmorillonite (MMT) and mixture of polyaniline with clay (MMT + PANI). The sedimentation experiment showed that the PANI-MMT nanocomposite particles did not deposit during about two months. The relevant influential factors between shear stress and electric fields, between shear stress and shear rate, between shear stress and temperature was also discussed preliminarily. The results showed that the MMT-PANI ER fluid displays a notable ER effect under DC electric field.

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16

Zou, Yubo, Zhicheng Zhang, Wenbin Zhong, and Wantai Yang. "Hydrothermal direct synthesis of polyaniline, graphene/polyaniline and N-doped graphene/polyaniline hydrogels for high performance flexible supercapacitors." Journal of Materials Chemistry A 6, no. 19 (2018): 9245–56. http://dx.doi.org/10.1039/c8ta01366g.

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Polyaniline, graphene/polyaniline and N-doped graphene/polyaniline hydrogels are directly synthesized through a hydrothermal process, promising for applications in high-performance flexible supercapacitors.

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17

Duhan, Monika, and Raminder Kaur. "Nano-Structured Polyaniline as a Potential Adsorbent for Methylene Blue Dye Removal from Effluent." Journal of Composites Science 5, no. 1 (December 31, 2020): 7. http://dx.doi.org/10.3390/jcs5010007.

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The textile sector is one of the major culprits of water pollution, and demands immediate attention. The coloured textile effluent, loaded with toxic dyes, when mixed with waterbodies, may harm aquatic life, plants, animals, and humans. Although polyaniline in its different forms was utilised for the adsorption of different dyes, the pure nano-fibrous form of polyaniline, i.e., PANI nanofibers, have reportedly not been used for the removal of dyes from wastewater. The present study aimed to employ nano-structured polyaniline, in the form of polyaniline nanofibers (base; PNB—polyaniline nanofiber base) for the elimination of methylene blue (cationic dye; MB) dye from its solution. The polyaniline nanofiber base (PNB) was synthesised by an interfacial polymerisation technique using ammonium persulphate as the oxidant and toluene as the organic solvent, and was characterised by FTIR, SEM, BET, HRTEM and XRD techniques. The HRTEM and SEM results showed that the average size of the synthesised polyaniline nanofiber base (PNB) was about 60 nm. BET revealed the enhanced surface area of polyaniline nanofiber base (PNB), i.e., 48 m2g−1 in comparison to that of conventionally synthesised polyaniline, which is only 14 m2g−1. The electric conductivity of the polyaniline nanofiber base (PNB) was reportedly lesser (2.3 × 10−2 S/cm) than the salt form of the polyaniline, measured by four probe technique. The batch-wise adsorption of MB was conducted onto the polyaniline nanofiber base (PNB), and the influence of the preliminary dye concentration, duration of contact and polyaniline nanofiber base (PNB) dose, etc., were studied. The equilibrium values of these parameters are reported as 6 mg/L, 60 min and 2 g/L, respectively. The results revealed the 91% sorption of dye onto the polyaniline nanofiber base (PNB). The experimental data were best-fitted to Pseudo-second order (R2 = 0.99) and followed Freundlich isotherm model (R2 = 0.97). On desorption, about 86% of the absorbed dye was recovered and the regenerated adsorbent could be used efficiently for three more cycles.

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18

Jia, Qing Ming, Shao Yun Shan, Li Hong Jiang, and Ya Ming Wang. "Isomerization of α-Pinene Catalyzed by Polyaniline with Different Morphologies." Advanced Materials Research 213 (February 2011): 506–9. http://dx.doi.org/10.4028/www.scientific.net/amr.213.506.

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Polyaniline with different morphologies doped by sulfuric acid were prepared using rapid mixture method. Scanning electron microscopy analysis showed that morphologies of polyaniline can be changed from unequal particles to nanowires with increasing the molar ratio of aniline to ammonium peroxydisulfate. The isomerization of -pinene were regarded as the goal reactions to study the effects of morphologies of polyaniline on the catalytic activities. The results proved that morphologies of polyaniline have a little effect on selectivity, but obviously affect the conversion rate of -pinene. The polyaniline nanowires hold the best catalytic activity among polyaniline with the three kinds of morphologies. The thermal behaviour of PANI was also investigated in detail by using a dynamic rate mode of thermogravimetric analyser (TGA) in inert atmosphere, and the results show that the polyaniline wires have good thermal stability.

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19

Chabukswar, Vasant, and Sanjay Bhavsar. "Synthesis and Characterization of Organically Soluble and Electrically Conducting Acids Doped Polyaniline." Chemistry & Chemical Technology 4, no. 4 (December 15, 2010): 277–80. http://dx.doi.org/10.23939/chcht04.04.277.

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Emeraldin salt of polyaniline was synthesized by chemical oxidative polymerization method; this salt is soluble in common organic solvents. The obtained results are discussed with reference to lactic acid doped polyaniline. It has been observed that acrylic acid doped polyaniline is comparatively more soluble than polyaniline doped with lactic acid in common organic solvent such as m-cresol, NMP (N-methyl pyrrolidinone), DMSO, DMF, etc. The acrylic acid doped polymer prepared using lactic acid is comparatively more soluble in m-cresol and NMP than the polyaniline without acrylic acid. UV-Visible spectra for acrylic acid doped polyaniline reveals the coil conformation at higher wavelength along with sharp peak. This indicates that the conductivity of acrylic acid doped polyaniline is higher than that of polyaniline without acrylic acid. A broad and intense band at 3400–3300cm-1 (N–H stretching) and 1120–1225 cm-1 accounts for higher degree of doping and protonation of amine and imine N-atom. These results are well supported by the conductivity measurement – the conductivity of acrylic acid doped polyaniline is higher than in case of polyanіline without acrylic acid.

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20

Muralidharan, D., R. Ramya, and K. Pandian. "Surface Modification of Cellulose Nanofiber with Polyaniline using Aniline Monolayer as Seed for Chemical Oxidation Polymerization of Aniline." Asian Journal of Chemistry 33, no. 2 (2021): 367–70. http://dx.doi.org/10.14233/ajchem.2021.23013.

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A simple method is adopted to prepare conducting polyaniline thin film on cellulose filter paper by chemical oxidative polymerization. In order to improve the adhesion of polyaniline on cellulose nanofiber aniline terminal, silane monolayer was used as catalyst to initiate polymerization reaction. It was also showed that aniline dimer modified cellulose nanofiber shows an enhanced polyaniline growth and acting as seed for the polyaniline growth. The polyaniline modified cellulose fibre filter paper was then characterized with UV-visible spectroscopy, FT-IR, FE-SEM and electrochemical studies. Polyaniline modified filter paper strips can be used for naked eye sensing of ammonia and hydrazine in environmental samples

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21

Fu, Ren Chun, Jun Du, Hui Huang, and Zhong Cheng Guo. "The Electrical Conductivity Stability of Polyaniline Doped with Three Different Acids." Advanced Materials Research 774-776 (September 2013): 803–6. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.803.

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The doping acid will obviously effect on the properties of polyaniline. In order to investigate the industrial acids influence the electrical conductivity stability of polyaniline, the hydrochloric acid (HCl), sulfuric acid (SA) and methanesulfonic acid (MSA) in industrial degree were chosen as doping acids to synthesize polyaniline. The stability of electrical conductivity was measured by in situ temperature. The mechanism of temperature dependence of electrical conductivity was discussed. The results revealed that the stability of polyaniline doped by hydrochloric acid (HCl) was better than that of polyaniline doped by other acids. The variable-range hopping (VRH) model could explain the temperature dependence of electrical conductivity of polyaniline.

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22

Guo, Wei, Hang Wu, Zhen Zhong Zheng, Qing Chang Chen, Ming Zhang, and Qing Guo Chu. "Study on Nano Polyaniline / Silver Composite Particles Preparation and Electrical Property." Advanced Materials Research 183-185 (January 2011): 1712–16. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1712.

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Polyaniline was synthesized by the chemical synthesis. Polyaniline as dispersion agent, nano silver / polyaniline composite particles was prepared by In-situ Synthesis in DMF solution. Nano Silver / Polyaniline / PMMA composites were prepared by direct dispersion method. The microstructure and characterization of the sample were studied by UV-Vis absorption spectroscopy infrared spectroscopy and XRD. The composite electrical conductivity was measured by four-probe method, showing that nano silver / polyaniline composite particle size was about 31.0 nm. When the doping concentration of nano-silver reached 0.12%, the electrical conductivity of silver / polyaniline / PMMA composite comparing to the pure PMMA material increased four orders of magnitude.

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23

Xiong, Shanxin, Yangbo Xu, Xiaoqin Wang, Ming Gong, Jia Chu, Runlan Zhang, Bohua Wu, Chenxu Wang, and Zhen Li. "Hydrothermal synthesis of polyaniline nanospheres coupled with graphene oxide for enhanced specific capacitance performances." Journal of Chemical Research 46, no. 6 (November 2022): 174751982211360. http://dx.doi.org/10.1177/17475198221136045.

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Polyaniline is one of the most common electrode materials for supercapacitors. The morphology of polyaniline directly affects the properties of polyaniline. In this paper, a new method for preparing hollow polyaniline nanospheres is described. Polyaniline-S with solid and hollow structures are successfully synthesized by the hydrothermal method, through varying the amounts of the catalyst and oxidant. The prepared hollow nanospheres have uniform particle size, a smooth surface, and uniform wall thickness. The hollow structure provides rapid permeability to the material, facilitating the transfer and transport of charges and ions in the electrolyte, and it can also act as an ion storage tank to increase the accumulation of ions inside. The specific capacitance of polyaniline-S is high at 235 F g-1 at 0.5 A g-1. To reduce the aggregation of polyaniline-S and improve the electrochemical activity, polyaniline-S, and graphene oxide are composited using the interfacial electrostatic interaction. The content of graphene oxide has a significant influence on the electrochemical performance of the composites. The specific capacitance of the polyaniline-S/ graphene oxide composite with a 10% loading amount of graphene oxide reaches 535 F g-1 at 0.5 A g-1, increase of nearly 128% compared to representing a significant polyaniline-S. The specific capacitance retention rate is 93.6% after 10,000 cycles.

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Ms. Dipali Nagnath Hodade, Dr. Mohan N Giriya. "Synthesis and Characterization Conducting Polymer Supported CDS-ZNS Nano Composites Used for Various Applications." Tuijin Jishu/Journal of Propulsion Technology 44, no. 4 (November 1, 2023): 3531–40. http://dx.doi.org/10.52783/tjjpt.v44.i4.1494.

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Keys include undertaking polymer synthesis and physical property research. Conductive is polyaniline. The presence of pristine nano CdS particles in the matrix was demonstrated by X-ray diffraction (XRD). In this study, four sol-gel techniques are used to prepare nanostructured polyaniline (PANI). PANI molecular structure was characterized using X-ray diffraction to assess the morphology of PANI samples. The results of the prepared PANI's characterization reveal that the unconventional synthesis methods utilized to create it drastically changed its morphology, chemical composition, crystallinity, conductivity, and surface area. The outcomes of the characterization supported this. The manufacturing and properties of polyaniline conducting polymers are examined in this research. The classic and grafted techniques of polyaniline synthesis have been examined. The relationship between structure and properties is established by this high-accuracy development procedure. In the future, polyaniline with altered structure may be employed. PANI/CdS nanocomposites have higher DC conductivity than PANI, according to observations. In situ production of conducting polyaniline nanocomposites with CdS nanoparticles was achieved by oxidizing aniline with cadmium sulphate at 3.5 pH. Electrical conductivity of polyaniline is influenced by CdS-nanoparticles. In contrast to pure polyaniline, the electrical conductivity of polyaniline nano-composite is increased by the homogenous intercalation of CdS nanoparticles, which results in a cooperative phenomenon between polyaniline and the nanoparticles.

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Khoshkbar Sadeghi, Alireza, and Maryam Farbodi. "Preparation of polyaniline-polyvinyl alcohol-silver nanocomposite and characterization of its mechanical and antibacterial properties." Science and Engineering of Composite Materials 25, no. 5 (September 25, 2018): 975–82. http://dx.doi.org/10.1515/secm-2016-0329.

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AbstractIn the present research, polyaniline is used as a conducting polymer and polyvinyl alcohol is also used as a biopolymer, because of its mechanical properties and suitable processability. Also, silver nanoparticles are considered as a reinforcing agent of thermal stability, mechanical and antibacterial properties to prepare polyaniline-polyvinyl alcohol-silver nanocomposite. The synthesis of polyaniline-polyvinyl alcohol composite and polyaniline-polyvinyl alcohol-silver nanocomposite is performed through addition of polyaniline and silver in polyvinyl alcohol solution. In order to review thermal, mechanical and antibacterial properties of synthesized composite and nanocomposites, components with different weight rates are used. The obtained results from thermogravimetric analysis (TGA) tests also indicate promotion of thermal stability of polyaniline-polyvinyl alcohol-silver nanocomposite compared with pure polyvinyl alcohol in temperatures above 400°C. The results of Fourier-transform infrared (FTIR) spectroscopy revealed the presence of polyaniline, polyvinyl alcohol and silver in the structure of polyaniline-polyvinyl alcohol-silver triple nanocomposite film. The obtained results from a review of antibacterial properties showed that polyaniline-polyvinyl alcohol-silver nanocomposites have antibacterial effects on two different types of Gram-positive and Gram-negative bacteria. The obtained results from a review of mechanical properties of nanocomposites showed that the greatest value of tensile strength (13.8 MPa) belonged to polyaniline-polyvinyl alcohol-silver (88%/9%/3% w/w) nanocomposites. Therefore, this is determined as an optimal triple nanocomposite. In addition, scanning electron microscopy (SEM) coupled with an energy dispersive X-ray (EDX) system was used to characterize the composition and structure of polyaniline-polyvinyl alcohol-silver nanocomposite film.

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Yan, Taohai, Jinhua Jiang, and Nanliang Chen. "Effects of Dopant Types and Contents on Morphology and Strength Properties of PANI/PAN Electrospun Nanofibers." MATEC Web of Conferences 237 (2018): 02016. http://dx.doi.org/10.1051/matecconf/201823702016.

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In this paper, the electrospinning of polyaniline under different dopant conditions were studied, the experimental phenomena was introduced, analyzed the relationship between the nanofiber surface morphology of DBSA-PANI/PAN, HCl-PANI/PAN and PTSA-PANI/PAN membranes and dopant type and content. The average diameter of DBSA-PANI/PAN electrospinning fiber membrane showed a decreasing trend when the content of doped polyaniline increased 1%-4%, and reached a minimum value of 780nm when the concentration was 4%. The strength of DBSA-PANI/PAN fiber membrane was the highest when the concentration of doped polyaniline was 1%, and the maximum intensity was 1.8×10 5 Pa. The average diameter of HCl/PANI/PAN fiber membranes decreases with the increase of doped polyaniline concentration, and it fluctuates up and down within a small range. When the content of doped polyaniline was increased to 4%, the average fiber diameter reached a minimum of 420 nm. The strength of the HCl-PANI/PAN fiber membrane was the highest when the concentration of doped polyaniline was 4%, and the maximum intensity was 1.08×10 5 Pa. The average diameter of the PTSA-PANI/PAN electrospun fiber membrane was the smallest at 2% doped polyaniline content and was 430 nm, the strength of PTSA-PANI/PAN fiber membrane is the highest when the content of doped polyaniline is 2%, and the maximum intensity is 3.9×10 4 Pa. In this paper, the basic research of doped polyaniline electrospinning nanofibers has made a useful supplement to the existing research of polyaniline nanofibers, and has a reference value for the application of polyaniline.

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Watanabe, Akira, Kunio Mori, Yasunori Iwasaki, Shuuji Murakami, and Yoshiro Nakamura. "Polyanilines prepared by electrochemical polymerization: Molecular weight of polyaniline films." Journal of Polymer Science Part A: Polymer Chemistry 27, no. 13 (December 1989): 4431–37. http://dx.doi.org/10.1002/pola.1989.080271321.

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Lacuesta, Aldwin Christian, Mary Donnabelle Balela, and Marvin U. Herrera. "Fabrication of Zinc Oxide-Polyaniline Composite on Kapok Paper for Methylene Blue Dye Removal in Aqueous Solution." Key Engineering Materials 779 (September 2018): 137–41. http://dx.doi.org/10.4028/www.scientific.net/kem.779.137.

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Polyaniline-zinc oxide composite on Kapok paper were fabricated for methylene blue dye removal in aqueous solution. Kapok fibers were fabricated into papers. The fabricate paper served as substrate for the zinc oxide-polyaniline composite. Zinc oxide particles were deposited on the Kapok paper using an in-situ method while polyaniline molecules are deposited on paper using Successive Ionic Layer Adsorption and Reaction (SILAR) method. The polyaniline molecules were deprotonated using sodium hydroxide (NaOH) to be able adsorb cationic dyes in aqueous solution. The samples were characterized using scanning electron microscope (SEM), energy dispersive X-ray (EDX) spectroscopy and Fourier transform infrared (FTIR) spectroscopy. Results show that the deprotonated polyaniline nanocomposite was able to remove at about 75% more dye compared to the as-synthesized polyaniline nanocomposite.

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Razali, Nor Faizah Binti, Abdul Wahab Mohammad, and Sulaiman Al Fadul. "Preparation, Characterization and Performance of Polyethersulfone(PES) – Polyaniline(Pani) Blended Membrane." Advanced Materials Research 233-235 (May 2011): 3018–22. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.3018.

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Polyaniline nanoparticle was synthesized via the chemical oxidation of aniline with ammonium persulphate in aqueous hydrochloric acid where the polyaniline particle size obtained was in the range of 22-53 nm. Polyaniline is one type of conducting polymers, where this polymer exhibit high electrical conductivity and have a wide range of interesting application due to its light weight, conductivity and chemical properties. Amongst the family of conducting polymers, polyaniline is unique due to ease of synthesis, environmental stability, simple doping/dedoping chemistry and relatively inexpensive cost. Polyaniline has been used to improve hydrophilic property and permeability of substrate membrane. It is used to obtain superhydrophilic surface because of their high surface energy and hydrophilic property. In this research, these nanoparticles have been used to improve hydrophilic property and permeability of polyethersulfone membrane. The blended membrane was characterized using pure water flux, Scanning Electron Microscope (SEM), and contact angle. As a result, polyaniline can distribute stably in polyaniline membrane to produce stable structure and preferable performance.

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Gao, Yu, Fengchun Wang, Jian Gong, Zhongmin Su, and Lunyu Qu. "Polyaniline Nanorods and Hollow-Microspheres Prepared by Using Copper Wires or Rings as Template." Journal of Nanoscience and Nanotechnology 8, no. 11 (November 1, 2008): 5972–76. http://dx.doi.org/10.1166/jnn.2008.18370.

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Polyaniline nanorods and hollow-microspheres have been successfully prepared by using copper wires and rings, respectively, as template in the presence of H4SiW12O40 and ammonium persulfate, which used as dopant and oxidant, respectively in this system. Different morphology of the resulting products can be obtained and controlled by using corresponding different shape of the objects. Furthermore, the template of this method not only needn't contain or react with chemicals but also the removal of it is extremely easy and facile without solvent or extra disposal. Meanwhile, possible formation processes of polyaniline nanorods and hollow-microspheres are proposed. The structure and morphology of the polyaniline nanorods and hollow-microspheres were characterized by Fourier Transform Infrared Spectrophotometer spectra, X-ray diffraction patterns, Scanning Electron Microscope images, and Transmission Electron Microscopy images. Prompted by the high surface areas, small diameter, and porous structure of the prepared polyaniline, we constructed the polyaniline gas sensors and found that the polyaniline hollow-microspheres had better sensitivity than the polyaniline nanorods to NH3 gas.

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31

Anadão, Priscila, Francisco Rolando Valenzuela-Díaz, and Hélio Wiebeck. "Preparation and Characterization of Poly(vinyl Butyral)-Polyaniline-Montmorillonite Nanocomposites." Journal of Nano Research 18-19 (July 2012): 291–97. http://dx.doi.org/10.4028/www.scientific.net/jnanor.18-19.291.

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Poly(vinyl butyral)-polyaniline-sodium montmorillonite nanocomposites were prepared via polymerization of aniline between clay mineral platelets at two different pH levels (2.0 and 5.0), followed by dispersion of the polyaniline-sodium montmorillonite nanocomposite in a poly(vinyl butyral) solution. A comparison was made of the effect of the pH levels and the polyaniline-sodium montmorillonite nanocomposite precursor on the final structures of the poly(vinyl butyral) nanocomposites and their electrical conductivities. X-ray diffraction patterns revealed the formation of nanocomposites at both pH levels. UV-Vis spectra indicated that the polyaniline formed at both pH levels was conductive, with the UV-Vis spectra presenting a band at 420 nm corresponding to the polaronic form and the beginning of a new band at 600 nm indicating the presence of polaronic segments. FTIR spectra revealed the peaks of the groups present in polyaniline and poly(vinyl butyral) nanocomposites. The electrical conductivities of the polyaniline and poly(vinyl butyral) nanocomposites prepared at pH 2.0 were lower than those of the same nanocomposites prepared at pH 5.0, probably due to the lower formation of polyaniline chains in a more acidic dispersion and to the final configuration of polyaniline in the nanocomposites.

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Pirsa, Sajad, and Behzad Mohammadi. "Conducting/biodegradable chitosan-polyaniline film; Antioxidant, color, solubility and water vapor permeability properties." Main Group Chemistry 20, no. 2 (July 22, 2021): 133–47. http://dx.doi.org/10.3233/mgc-210007.

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In this study, chitosan-polyaniline nanocomposite film was prepared in combination with different concentrations of polyaniline at various synthesis times. Surface morphology, antioxidant properties, water solubility, water vapor permeability (WVP), color properties and light transparency properties of the films were investigated. The size, shape and morphology of the synthesized particles were examined with scanning electron microscopy (SEM) technique. The results indicated that the synthesized polyaniline particles were spherical and in the range of 45–70 nm. The results obtained from the study of the effect of polyaniline on the physical properties of the chitosan film showed that increasing polyaniline concentration and synthesis time causes a decrease in the rate of the water solubility and water vapor permeability. This is an important factor in expanding its use in food packaging. The results of the colorimetric studies showed that the polyaniline sharply changed the surface color of the film. Polyaniline also increased antioxidant properties of composite film. Investigating the light transmission and transparency of the films showed that the polyaniline reduced the transparency and transmission of light, which could be used to package products that are susceptible to oxidation in the light.

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33

H. Mahmoud, Zaid, Ghadir Kamil Ghadir, Hayder Musaad Al-Tmimi, Saeb Jasim Al-Shuwaili, Ahmed Ali Ami, Usama Kadem Radi, Safaa Mustafa Hameed, and Mohammed Ahmed Mustafa. "Polyaniline/TiO2 nanocomposite for high performance supercapacitor." Bulletin of the Chemical Society of Ethiopia 38, no. 4 (April 30, 2024): 1177–88. http://dx.doi.org/10.4314/bcse.v38i4.28.

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A binary polyaniline/TiO2 and varied weight ratio TiO2/PANI nanocomposite was successfully fabricated as an electrode for energy storage application. The TiO2 nanoparticles were synthesized via manual irradiation system with wavelength 256 nm and power 125 W. Polyaniline/TiO2 was then prepared by in situ polymerizing TiO2 onto aniline monomer. Polyaniline nanofibers are loaded with TiO2 to product core-shell system. The polyaniline/TiO2 nanocomposite were characterized using XRD, XPS, TEM, TGA, CP and LCR measurements. The structure properties were examined by XRD and XPS, which confirmed preparing polyaniline/TiO2 binary nanocomposite. The thermal stability was investigated using TGA and obtained high stability of polyaniline/TiO2 compared with polyaniline, while the electrochemical properties were examined by LCR measurements. The LCR measurements were appeared dielectric constant and dielectric loss for incorporating TiO2 through PANI. Varied weights ratio TiO2 was worked in increasing the stored energy ability of polyaniline. Notably, the electrochemical investigate results appear that the PANI/TiO2 has a high specific capacitance (250 F/g) compared with pure PANI (200 F/g). KEY WORDS: Supercapacitor, UV irradiation, XPS, LCR, nanofibers Bull. Chem. Soc. Ethiop. 2024, 38(4), 1177-1188. DOI: https://dx.doi.org/10.4314/bcse.v38i4.28

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Kriswandono, Yishar, Munaji Munaji, and Triwikantoro. "Electrical Conductivity of SDBS-Assisted Polyaniline Doped with HCl." Materials Science Forum 1057 (March 31, 2022): 26–31. http://dx.doi.org/10.4028/p-6a9o69.

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In this study, polyaniline (PANI) was synthesized through oxidative polymerization assisted by sodium dodecylbenzene sulfonate (SDBS) in hydrochloric acid (HCl) concentration solution to investigate the effect of dopants in the electrical conductivity of polyaniline. The polyaniline obtained from the oxidative polymerization was confirmed with FTIR. The x-ray diffraction pattern showed that polyaniline is semi-crystalline. SDBS does not only act as a template for oxidative polymerization but also acts as a dopant. The dielectric constant, the dielectric loss, and the ac conductivity increase as polyaniline is doped with SDBS, HCl, or with both SDBS and HCl.

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35

Ebrahim, Sh, R. El-Raey, A. Hefnawy, H. Ibrahim, and M. Soliman. "A Novel Chloropyrifos Electrochemical Sensor Based on Polyaniline/Carbon Nanotubes Composite." Key Engineering Materials 605 (April 2014): 99–102. http://dx.doi.org/10.4028/www.scientific.net/kem.605.99.

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Polyaniline nanofibers were prepared chemically in both emiraldine base (EB) and emiraldine salt (ES) forms. The composite of polyaniline emiraldine salt with single walled carbon nanotubes (SWCNTs) was developed. Electrochemical sensors based on polyaniline nanofibers and its composite have been developed for the detection of chloropyrifos. Chloropyrifos exhibits one well defined reduction peak. The maximum peak current was linearly related to chloropyrifos concentration in the range from 0.2 μM to 1.4 μM. It was found that the SWCNTs improved the sensitivity of the polyaniline base graphite electrode from 3.0 mA/μM for polyaniline base to 9.69 mA/μM for ES-SWCNTs composite electrode.

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36

Zhao, Zhong Li, Zun Li Mo, and Zhong Yu Chen. "Heterogeneous Preparation of Cellulose/Ag/Polyaniline Conductive Composite and its Electrical Property." Applied Mechanics and Materials 182-183 (June 2012): 254–58. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.254.

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Cellulose/Ag/polyaniline conductive composite with rather excellent electrical conductivity was heterogeneously synthesized in this paper. The UV-Vis analysis indicated that homogeneous nanoAg particles deposited on the surface of cellulose in the form of globe particles. They offered some electrons to polyaniline chains. This behavior resulted to the facts that more polyaniline embedded on cellulose and an integrated electrically conductive network formed. Consequently, the high electrical conductivity of the composite was observed. The value was 3.48 S/cm, which was higher two magnitudes than the electrical conductivity of cellulose/polyaniline composite (2.15×10-2S/cm), and even was higher than the electrical conductivity of pure polyaniline (0.142 S/cm). This paper provided a facile method for the preparation of cellulose/Ag/ polyaniline composite with favorable electrical conductivity.

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37

Mohammadi, Behzad, Sajad Pirsa, and Mohammad Alizadeh. "Preparing chitosan–polyaniline nanocomposite film and examining its mechanical, electrical, and antimicrobial properties." Polymers and Polymer Composites 27, no. 8 (May 23, 2019): 507–17. http://dx.doi.org/10.1177/0967391119851439.

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In recent years, development and progress in modern packaging resulting from degradable natural resources have grown remarkably. In this study, chitosan–polyaniline film was prepared with a combination of different concentrations of polyaniline and various synthesis times to produce antimicrobial and biodegradable packaging film. The physical, electrical, and mechanical properties of the films were investigated. The interaction between chitosan and polyaniline was confirmed by Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction patterns. The size and morphology of the synthesized particles were examined by scanning electron microscopy. The results indicated that the synthesized polyaniline particles had a spherical shape (45–100 nm). The antimicrobial and antifungal activity of the films against Aspergillus niger fungi (antifungal area: 61.47 mm2) and Escherichia coli bacteria (antimicrobial area: 187.27 mm2) increased with increasing the concentration of polyaniline. The results obtained from the study of the effect of polyaniline on the electrical conductivity of the chitosan film showed that increasing the polyaniline concentration and synthesis time resulted in decreased electrical resistance of the film, for which the film with the highest aniline concentration and the highest synthesize time had the lowest resistance. According to the mechanical property results, tensile strength (TS) and elastic modulus were increased due to the addition of the polyaniline to the polymer matrix. The chitosan blank film had a lower TS than nanocomposites. As the final results, the chitosan–polyaniline film has good electrical conductivity, indicating that the produced film could be used in intelligent food packaging.

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Guo, Li, Yuan Bao Sun, Jian Qiang Hu, and Zhi Jie Huang. "A Facile Approach to Increase Conductivity of Polyaniline Nanofibers." Advanced Materials Research 466-467 (February 2012): 88–92. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.88.

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We described a facile approach to carrying out secondary doping of polyaniline nanofibers. SEM, UV-VIS-NIR and XRD techniques were used to characterize the secondary doping and de-doping of polyaniline nanofibers. The conductivity of secondary doping and de-doping of polyaniline nanostructure with m-cresol is higher than before secondary doping of it accompany with keeping nanostructure. A new approach to improving electric performance of polyaniline nanostructure was provided.

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Wang, Xiaoning, Dan Wu, Xinhui Song, Wei Du, Xiangjin Zhao, and Dongmei Zhang. "Review on Carbon/Polyaniline Hybrids: Design and Synthesis for Supercapacitor." Molecules 24, no. 12 (June 18, 2019): 2263. http://dx.doi.org/10.3390/molecules24122263.

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Polyaniline has been widely used in high-performance pseudocapacitors, due to its low cost, easy synthesis, and high theoretical specific capacitance. However, the poor mechanical properties of polyaniline restrict its further development. Compared with polyaniline, functionalized carbon materials have excellent physical and chemical properties, such as porous structures, excellent specific surface area, good conductivity, and accessibility to active sites. However, it should not be neglected that the specific capacity of carbon materials is usually unsatisfactory. There is an effective strategy to combine carbon materials with polyaniline by a hybridization approach to achieve a positive synergistic effect. After that, the energy storage performance of carbon/polyaniline hybridization material has been significantly improved, making it a promising and important electrode material for supercapacitors. To date, significant progress has been made in the synthesis of various carbon/polyaniline binary composite electrode materials. In this review, the corresponding properties and applications of polyaniline and carbon hybrid materials in the energy storage field are briefly reviewed. According to the classification of different types of functionalized carbon materials, this article focuses on the recent progress in carbon/polyaniline hybrid materials, and further analyzes their corresponding properties to provide guidance for the design, synthesis, and component optimization for high-performance supercapacitors.

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Kodge, Anilkumar, and Arunkumar Lagashetty. "γ-Fe2O3 Dispersed Polyaniline Nanocomposite." International Journal of Scientific Research 2, no. 3 (June 1, 2012): 115–17. http://dx.doi.org/10.15373/22778179/mar2013/37.

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41

Kodge, Anilkumar, and Arunkumar Lagashetty. "Y-Fe2O3 Dispersed Polyaniline Nanocomposite." International Journal of Scientific Research 2, no. 3 (June 1, 2012): 115–17. http://dx.doi.org/10.15373/22778179/mar2013/69.

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42

Wang, Wen Jie, Chong Guang Zang, and Qing Jie Jiao. "Magnetic Ferrite/Conductive Polyaniline Nanocomposite as Electromagnetic Microwave Absorbing Materials in the Low Frequency." Applied Mechanics and Materials 333-335 (July 2013): 1811–15. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.1811.

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Electromagnetic microwave absorbing composite material containing magnetic Mn-Zn ferrite/conductive polyaniline nanocomposites introducing into epoxy resin were fabricated. The conductivity of the Mn-Zn ferrite/polyaniline nanocomposites were investigated by a four point probe method. Complex permeability and reflection loss of the Mn-Zn ferrite/conductive polyaniline/epoxy resin composites have been studied in the frequency of 30 MHz to 1 GHz. It has been found that the conductivity of the nanocomposites can be tailored by controlling the weight percentage of polyaniline. The complex permeability increased with the decreasing weight percent of polyaniline. The composite with the polyaniline weight percent of above 60.89 % can effectively broaden the absorbing band with minimum absorption of 5 dB about 500 MHz. It has also been found that the composite with the polyaniline weight percent of 28.12 % has a maximum absorption of 23 dB at about 700 MHz for a coating thickness of 2 mm. Therefore, the prepared composites can be potentially applied in electromagnetic absorbing field in the low frequency.

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43

Ketut Umiati, Ngurah Ayu, Kamsul Abraha, and Kuwat Triyana. "Electrical Conductivity of Polyaniline Fiber Synthesized by Interfacial Polymerization and Electrospinning." Indonesian Journal of Electrical Engineering and Computer Science 5, no. 1 (January 1, 2017): 85. http://dx.doi.org/10.11591/ijeecs.v5.i1.pp85-89.

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<p align="justify">Polyaniline fiber is a promising biosensor material due to the capability of this material as an effective mediator for electron transfer. The polyaniline in fibre has wider surface to increase the electron transfer. In this work, polyaniline structure synthesized by interfacial polymerization was compared to polyaniline structure obtained from electrospinning to get a better fibre structure. Interfacial polymerization was carried out to form a polymerization between the water phase and the organic phase. The water phase was prepared from dopants, initiator and aquadestilata and the organic phase was was made from toluene as an organic solvent and aniline monomer. Electrospinning was conducted by using a dc high voltage 15 kV and 0.5 mm syringe needle to produce fibers from a melt polymer solution taken from interfacial polymerization. The scanning electro microscope results confimed the formation of polyaniline in structure of fiber. Resistance measurement by using LCR meter showed that polyaniline fiber resulted from electrospinning is more conductive than polyaniline fiber formed by interfacial polymerization method. </p><p align="justify"> </p>

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44

Tsanov, Tihomir, and Levon Terlemezyan. "New Evidence Supporting the Interfacial Model of Electrically Conductive Polymer Composites: I. Conductivity Behaviour of Polyaniline-Poly(ethylene-co-vinyl acetate) Composites." Engineering Plastics 5, no. 7 (January 1997): 147823919700500. http://dx.doi.org/10.1177/147823919700500703.

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The change in the conducting properties of polyaniline-poly(ethylene-co-vinyl acetate (EVA)) composite films was investigated as a function of time. For the first time it was shown that the apparent concentration (ϕc), of polyaniline at which a conductivity jump occurs is not constant during ageing. Moreover, the conductivity behaviour of polyaniline-EVA composites is variable and dynamic during storage. The electrical conductivity of the films of low polyaniline content (up to 2.5 wt. %) increased by several orders of magnitude over a period of eight months. It was supposed that the polyaniline phase undergoes flocculation and that subsequently, a continuous conductive network is formed. The conductivity jump was attributed to dynamic interfacial interactions between the constituents of the polyaniline-EVA composites. A decrease in the average conductivity deviations for the samples of low polyaniline content (<2.5 wt.%) was observed, indicating that improvement of conductive pathways took place within the bulk of the insulating EVA matrix. Hence, the present study supported the dynamic interfacial model (particularly the dispersion/flocculation phase transition) of conductive polymer composites, proposed by Wessling.

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45

Tsanov, Tihomir, and Levon Terlemezyan. "New Evidence Supporting the Interfacial Model of Electrically Conductive Polymer Composites: I. Conductivity Behaviour of Polyaniline-Poly(ethylene-co-vinyl acetate) Composites." Polymers and Polymer Composites 5, no. 7 (January 1997): 483–92. http://dx.doi.org/10.1177/096739119700500703.

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The change in the conducting properties of polyaniline-poly(ethylene-co-vinyl acetate (EVA)) composite films was investigated as a function of time. For the first time it was shown that the apparent concentration (ϕc), of polyaniline at which a conductivity jump occurs is not constant during ageing. Moreover, the conductivity behaviour of polyaniline-EVA composites is variable and dynamic during storage. The electrical conductivity of the films of low polyaniline content (up to 2.5 wt. %) increased by several orders of magnitude over a period of eight months. It was supposed that the polyaniline phase undergoes flocculation and that subsequently, a continuous conductive network is formed. The conductivity jump was attributed to dynamic interfacial interactions between the constituents of the polyaniline-EVA composites. A decrease in the average conductivity deviations for the samples of low polyaniline content (<2.5 wt.%) was observed, indicating that improvement of conductive pathways took place within the bulk of the insulating EVA matrix. Hence, the present study supported the dynamic interfacial model (particularly the dispersion/flocculation phase transition) of conductive polymer composites, proposed by Wessling.

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46

Li, Zhiwei. "Preparation of Two-Dimensional Polyaniline Sheets with High Crystallinity via Surfactant Interface Self-Assembly and Their Encryption Application." Polymers 16, no. 9 (May 3, 2024): 1285. http://dx.doi.org/10.3390/polym16091285.

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In recent years in the field of traditional materials, traditional polyaniline has faced a number of scientific problems such as an irregular morphology, high difficulty in crystallization, and difficulty in forming an ordered structure compared to the corresponding inorganic materials. In response to these urgent issues, this study determines how to prepare a highly ordered structure in polyaniline formed at the gas-liquid interface. By dynamically arranging aniline monomers into a highly ordered structure with sodium dodecyl benzene sulfonate (SDBS) surfactant, aniline polymerization is initiated at the gas-liquid interface, resulting in two-dimensional polyaniline crystal sheets with a highly ordered structure. By elucidating the microstructure, crystallization process, and molecular structure of the two-dimensional polyaniline crystal sheets, the practical application of polyaniline as an encryption label in the field of electrochromism has been further expanded, thus making polyaniline widely used in the field of information encryption. Therefore, the synthesis of flaky polyaniline crystal sheets has a role in scientific research and practical application, which will arouse the interest and exploration of researchers.

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47

Drame, Trafela, and Rožman. "Nanostructured Molecularly Imprinted Polyaniline for Acrylamide Sensing." Proceedings 15, no. 1 (August 13, 2019): 37. http://dx.doi.org/10.3390/proceedings2019015037.

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Due to the non-electroactivity of carcinogenic organic compound acrylamide, an indirect electrochemical detection by using molecularly imprinted polymer is proposed as a detection method. Polyaniline was chosen due to the conductivity, interesting properties and wide usage in the field of sensors. Polyaniline was prepared by the different electropolymerisation process to achieve different morphologies, properties. Cyclic voltammetry was further chosen for electropolymeristion of polyaniline, in which propanamide was imprinted as a template molecule. Due to the same size, shape and functional groups, so imprinted polyaniline presents a proof of concept molecule for further acrylamide bonding. Successful imprinting was confirmed by surface analysis technique (FTIR) and simple electrochemical measurements of polyaniline response.

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48

Zhang, Qing Li, Yan Xia Chang, Lian Jun Wang, and Wan Jiang. "Preparation and Thermoelectric Properties of Polyaniline Doped with Protonic Acids." Materials Science Forum 743-744 (January 2013): 100–104. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.100.

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Hydrochloric acid doped polyaniline and camphor sulfonic acid doped polyaniline were prepared by oxidative chemical polymerization and grinding, respectively. The structures of polyaniline samples were measured by Fourier transform infared spectroscopy. The Seebeck coefficient and electrical conductivity of the composites were investigated as protonic acid content in the temperature range from room temperature to 380K. The highest electrical conductivity of the 1M hydrochloric acid doped polyaniline reaches 5.57×102S/m at 320K, and the mass ratio of 1:1 camphor sulfonic acid doped polyaniline reaches 5.97×102S/m at 380K. This work suggests that a new method improves the thermoelectric properties of conducting polymers.

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Sun, Hong Juan, Ying Liu, Tong Jiang Peng, Hai Feng Liu, and Jin Mei Sun. "Synthesis and Electrical Conductivity Measurement of Polyaniline / Vermiculite Nanocomposites." Advanced Materials Research 96 (January 2010): 221–26. http://dx.doi.org/10.4028/www.scientific.net/amr.96.221.

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A series of polyaniline/vermiculite nanocomposites was synthesized. The interlayer space of vermiculite was initially increased by the insertion of dioctadecyl dimethyl ammonium bromide, and then the aniline monomers were inserted into the interlayer space of vermiculite replacing dioctadecyl dimethyl ammonium cations. The polyaniline/vermiculite nanocomposites materials were prepared via in situ polymerization of the aniline monomers in the interlayer space of vermiculite. The as-synthesized polyaniline/vermiculite nanocomposite materials were characterized by X-ray diffraction analysis, infrared spectroscopy, and electrical conductivity measurement. The results indicated that the vermiculite was peeled off into the polyaniline. The introduction of vermiculite nanosheets showed a beneficial effect on the electrical conductivity of polyaniline.

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Fusalba, Florence, and Daniel Bélanger. "Chemical synthesis and characterization of polyaniline-molybdenum trisulfide composite." Journal of Materials Research 14, no. 5 (May 1999): 1805–13. http://dx.doi.org/10.1557/jmr.1999.0244.

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A novel polyaniline-molybdenum trisulfide composite has been prepared by chemical polymerization from an acidic (1 M HCl) aqueous solution containing aniline and ammonium tetrathiomolybdate. The presence of molybdenum trisulfide in the polyaniline matrix induces morphological change to the polymer as evidenced by scanning electron micrographs. X-ray diffraction and differential scanning calorimetry indicate that polyaniline-molybdenum trisulfide is slightly less crystalline than polyaniline-HCl. X-ray photoelectron spectroscopy (XPS) and elemental analysis have been used to confirm the presence of molybdenum trisulfide in the polymer matrix. The XPS data also confirm that molybdenum trisulfide and tetrathiomolybdate anions are present with polyaniline to form a new inorganic-organic composite.

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Journal articles on the topic 'Polyaniline'

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