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Artykuły w czasopismach na temat „Polypyrrole based nanocomposites”

Autor: Grafiati

Data publikacji: 6 września 2023

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1

Ahmad, Sharique, Imran Khan, Ahmad Husain, Anish Khan i Abdullah M. Asiri. "Electrical Conductivity Based Ammonia Sensing Properties of Polypyrrole/MoS2 Nanocomposite". Polymers 12, nr 12 (18.12.2020): 3047. http://dx.doi.org/10.3390/polym12123047.

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Polypyrrole (PPy) and Polypyrrole/MoS2 (PPy/MoS2) nanocomposites were successfully prepared, characterized and studied for ammonia sensing properties. The as-prepared PPy and PPy/MoS2 nanocomposites were confirmed by FTIR (Fourier transform infrared spectroscopy), XRD (X-ray diffraction), SEM (scanning electron microscopy) and TEM (transmission electron microscopy) techniques. The ammonia sensing properties of PPy and PPy/MoS2 nanocomposites were studied in terms of change in DC electrical conductivity on exposure to ammonia vapors followed by ambient air at room temperature. It was observed that the incorporation of MoS2 in PPy showed high sensitivity, significant stability and excellent reversibility. The enhanced sensing properties of PPy/MoS2 nanocomposites could be attributed to comparatively high surface area, appropriate sensing channels and efficiently available active sites. The sensing mechanism is explained on the basis of simple acid-base chemistry of polypyrrole.

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2

Salman, Mohammed Abdilridha, i Salma M. Hassan. "Antibacterial and morphological properties of polypyrrole/silver nanocomposites synthesized by chemical oxidative polymerization". Iraqi Journal of Physics (IJP) 19, nr 48 (27.02.2021): 33–43. http://dx.doi.org/10.30723/ijp.v19i48.614.

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Polypyrrole/silver (PPy/Ag) nanocomposites was synthesized via a chemical oxidative method. The AFM analysis is performed to study the surface roughness, morphology and size distribution of the PPy particles and PPy-ag nanocomposites. The results indicated that as the concentration of Ag in the nanocomposite increases, the roughness also increases. The size of nanoparticles was also evaluated and found in the range of 15 nm to 125 nm. The PPy/Ag nanocomposites exhibited an effectiveness against Gram-negative Escherichia coli showing an inhibition zone of 4mm and displayed poor efficacy against Gram-positive Staphylococcus aureus. Based on given adequate antibacterial characteristics of PPy/Ag nanocomposites, it can be identified as a promising material in biomedical applications.

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3

Najjar, Reza, i Samira Nematdoust. "A resistive-type humidity sensor based on polypyrrole and ZnO nanoparticles: hybrid polymers vis-a-vis nanocomposites". RSC Advances 6, nr 113 (2016): 112129–39. http://dx.doi.org/10.1039/c6ra24002j.

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Sultan, Adil, Sharique Ahmad, Tarique Anwer i Faiz Mohammad. "Binary doped polypyrrole and polypyrrole/boron nitride nanocomposites: preparation, characterization and application in detection of liquefied petroleum gas leaks". RSC Advances 5, nr 128 (2015): 105980–91. http://dx.doi.org/10.1039/c5ra21173e.

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We report an electrical conductivity based rapid response liquefied petroleum gas (LPG) sensor using binary doped polypyrrole and polypyrrole/boron nitride (PPy/BN) nanocomposites as the conductive material.

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5

Su, Pi-Guey, i Xing-Chen Chai. "Room-Temperature ppb-Level H2S Gas Sensors Based on Ag Nanowire/Hollow PPy Nanotube Nanocomposites". Chemosensors 10, nr 8 (2.08.2022): 305. http://dx.doi.org/10.3390/chemosensors10080305.

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H2S gas sensors were fabricated using Ag nanowire/hollow polypyrrole nanotube nanocomposite (Ag NW/hollow PPy NT) film for sensing ppb-level H2S gas at room temperature. The morphology, phase composition and crystalline structure of Ag NW/hollow PPy NT nanocomposites were analyzed via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and Fourier-transform infrared spectroscopy (FTIR). TEM and SEM images revealed that Ag NWs were well dispersed in the hollow PPy NT matrix. IR results showed no interaction between Ag NWs and hollow PPy NTs in the Ag NW/hollow PPy NT nanocomposites. The effect of the amount of added Ag NWs on the response of the Ag NW/hollow PPy NT nanocomposites to the ppb-level H2S gas was investigated. Comparative gas-sensing results revealed that the introduction of Ag NWs onto hollow PPy NTs was effective in promoting the sensor response to H2S gas. More importantly, the Ag NW/hollow PPy NT nanocomposite had a strong response to ppb-level H2S gas at room temperature.

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6

Guettiche, Djamil, Ahmed Mekki, Tighilt Fatma Zohra, Noureddine Ramdani i Rachid Mahmoud. "Chemiresistive sensors based on Dodecyl benzene Sulfonic acid doped Polypyrrole and Reduced Graphene Oxide for nitrogen oxides". IOP Conference Series: Materials Science and Engineering 1204, nr 1 (1.11.2021): 012004. http://dx.doi.org/10.1088/1757-899x/1204/1/012004.

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Abstract A new series of polypyrrole doped with n-dodecylbenzene sulphonic acid/reduced graphene oxide (PPy-DBSA/rGO) nanocomposite was electrodeposited on Indium tin oxide coated Polyethylene terephthalate (ITO/PET) flexible substrate by electrochemical route using the chronoamperometric technique. As-prepared for testing of chemiresistive properties against the detection of nitrogen dioxide (NO2) vapors at room temperature. The sensitivity and reactivity of the composite toward NO2 was evaluated. The recorded morphological and structural data confirmed that the PPy-DBSA/rGO forms a homogeneous nanocomposite. The optimal NO2 sensing properties have been revealed by the PPy-DBSA/rGO in terms of response (43%), response time (30.25 s), the detection limit (1ppm), and reproducibility. Furthermore, Results showed that the doped by sulfonic acid improved both the sensitivity and the reactivity of our produced nanocomposite toward NO2. Due to the strong interactions between the NO2 gas molecules and the rGO was dramatically enhanced the electronic properties of these nanocomposites. These striking characteristics of the newly developed nanocomposites make them very suitable to be used as NO2 gas sensor.

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7

Baghdadi, Neazar, M. Sh Zoromba, M. H. Abdel-Aziz, A. F. Al-Hossainy, M. Bassyouni i Numan Salah. "One-Dimensional Nanocomposites Based on Polypyrrole-Carbon Nanotubes and Their Thermoelectric Performance". Polymers 13, nr 2 (16.01.2021): 278. http://dx.doi.org/10.3390/polym13020278.

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Conducting polymers have attracted significant attention due to their easy fabrication, morphology modification, and their electrical properties. Amongst them, polypyrrole (PPy) has attractive thermoelectric (TE) properties. Engineering of this polymer in one-dimensional (1D) nanostructured form is found to enhance its TE performance. This was achieved in the present work by using multi-walled carbon nanotubes (MWCNTs) as a core template to direct the self-assembly of PPy and also to further enhance its TE performance. The growth of PPy on the sidewalls of MWCNTs was performed in an acidic medium based oxidative in situ polymerization. Various concentrations of MWCNTs within the range 1.1–14.6 wt.% were used to form the MWCNTs/PPy nanocomposites in 1D core-shell structures. The morphology and microstructure results of the produced nanocomposite samples showed that this MWCNTs were successfully coated by thick and thin layers of PPy. At low concentrations of MWCNTs, thick layers of PPy are formed. While at high concentrations thin layers are coated. The formed 1D nanocomposites have enhanced TE performance, particularly those containing higher contents of MWCNTs. The power factor and figure of merit values for the formed 1D nanocomposites recorded around 0.77 µV/mK2 and 1 × 10−3 at room temperature (RT), respectively. This enhancement was attributed to the perfect coating and good interaction between PPy and MWCNT through π–π stacking between the polymer chains and these nanotubes. These results might be useful for developing future TE materials and devices.

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8

German, Natalija, Almira Ramanaviciene i Arunas Ramanavicius. "Formation and Electrochemical Evaluation of Polyaniline and Polypyrrole Nanocomposites Based on Glucose Oxidase and Gold Nanostructures". Polymers 12, nr 12 (17.12.2020): 3026. http://dx.doi.org/10.3390/polym12123026.

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Nanocomposites based on two conducting polymers, polyaniline (PANI) and polypyrrole (Ppy), with embedded glucose oxidase (GOx) and 6 nm size gold nanoparticles (AuNPs(6nm)) or gold-nanoclusters formed from chloroaurate ions (AuCl4−), were synthesized by enzyme-assisted polymerization. Charge (electron) transfer in systems based on PANI/AuNPs(6nm)-GOx, PANI/AuNPs(AuCl4−)-GOx, Ppy/AuNPs(6nm)-GOx and Ppy/AuNPs(AuCl4−)-GOx nanocomposites was investigated. Cyclic voltammetry (CV)-based investigations showed that the reported polymer nanocomposites are able to facilitate electron transfer from enzyme to the graphite rod (GR) electrode. Significantly higher anodic current and well-defined red-ox peaks were observed at a scan rate of 0.10 V s−1. Logarithmic function of anodic current (log Ipa), which was determined by CV-based experiments performed with glucose, was proportional to the logarithmic function of a scan rate (log v) in the range of 0.699–2.48 mV s−1, and it indicates that diffusion-controlled electrochemical processes were limiting the kinetics of the analytical signal. The most efficient nanocomposite structure for the design of the reported glucose biosensor was based on two-day formed Ppy/AuNPs(AuCl4−)-GOx nanocomposites. GR/Ppy/AuNPs(AuCl4−)-GOx was characterized by the linear dependence of the analytical signal on glucose concentration in the range from 0.1 to 0.70 mmol L−1, the sensitivity of 4.31 mA mM cm−2, the limit of detection of 0.10 mmol L−1 and the half-life period of 19 days.

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9

Zhang, Dawei, Qing Zhang, Xin Gao i Guangzhe Piao. "A Nanocellulose Polypyrrole Composite Based on Tunicate Cellulose". International Journal of Polymer Science 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/175609.

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The water-dispersed conductive polypyrrole (PPy) was prepared via thein situoxidative chemical polymerization by using ammonium persulfate (APS) as oxidant and tunicate cellulose nanocrystals (T-CNs) as a dopant and template for tuning the morphologies of PPy nanoparticles. Highly flexible paper-like materials of PPy/T-CNs nanocomposites with high electrical conductivity values and good mechanical properties were prepared. The structure of nanocomposites of PPy/T-CNs was investigated by using Fourier transform infrared spectroscopy. Scanning electron microscopy and transmission electron microscopy analyses of the composites revealed that PPy consisted of nanoparticles about 2.5 nm in mean size to form a continuous coating covered on the T-CNs. The diameters of the PPy nanoparticles increased from 10 to 100 nm with the increasing pyrrole amount. Moreover, electrical properties of the obtained PPy/T-CNs films were studied using standard four-probe technique and the electrical conductivity could be as high as 10−3 S/cm.

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10

Wang, Huan, Pei Qin, Yun-Hui Feng, Hui-Liang Sun, Hui-Xiang Wu, Bo-Kai Liao, Yue-Bin Xi i Wei Wang. "Polypyrrole Film Deposited-TiO2 Nanorod Arrays for High Performance Ultraviolet Photodetectors". Chemosensors 10, nr 7 (13.07.2022): 277. http://dx.doi.org/10.3390/chemosensors10070277.

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TiO2-based ultraviolet photodetectors have drawn great attention and are intensively explored. However, the construction of TiO2-based nanocomposites with excellent ultraviolet responses remains challenging. Herein, a TiO2 nanorod array was successfully prepared on fluorine-doped tin oxide (FTO) conductive glass by a one-step hydrothermal method. Then, polypyrrole (PPy)-TiO2 nanorod array composites were designed via subsequent in situ oxidative polymerization. The morphologies, structures, and photocurrent responses of the nanocomposites were systematically investigated. The results demonstrated that polypyrrole-TiO2 exhibited a stronger photocurrent response than pure TiO2 due to the p-n junction formed between n-type TiO2 nanorod arrays and p-type polypyrrole. The PPy-TiO2 composite obtained by deposition three times had the best photoelectric properties, exhibiting good performance with a sensitivity of 41.7 and responsivity of 3.5 × 10−3 A/W. Finally, the mechanism of the photoelectrical response of PPy-TiO2 composites was discussed, guiding the design of high-performance TiO2-based ultraviolet photodetectors.

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11

Hosseini, Seyed Hossien, Ali Azimi i Sadat Hosseini Sama. "Preparation of Microwave Multi-Adsorbent Nanocomposites Based on Copper, Iron Carbonyl, Carbon Nanofiber, Graphite Nanoflake and Polypyrrole". Journal of Advances in Nanotechnology 1, nr 3 (23.11.2020): 42–55. http://dx.doi.org/10.14302/issn.2689-2855.jan-20-3616.

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The composites of Cu, Carbonyl iron (CI), carbon nanofiber (CNF), graphite nanoflake (GNF)/polypyrrole (PPy) and [(Cu-CI-CNF-GNF) 0.5-PAA]-PPy0.5 were synthesized via different methods by in-situ polymerization on the surface of nanoparticles (NPs) with core-shell structure. This paper describes a method for polyacrylic acid (PAA) coating of NPs in aqueous solution. Then PPy coating was performed by template polymerization on NPs-PAA. Morphology, magnetic and conductivity properties were observed via scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and four probe method, respectively. The microwave characterization of nanocomposite was evaluated through arch test based on a network analyzer. The PPy nanocomposites possessed the excellent microwave multi absorbers properties in 2-18 GHz. It was also found that nanocomposites with 50% w/w and light weight exhibit good microwave absorbing properties in 2-3 GHz and 5-14 GHz frequency, so can be used to cellphone, radio frequency and radar shielding.

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12

Hosseini, Seyed Hossien, Ali Azimi i Sadat Hosseini Sama. "Preparation of Microwave Multi-Adsorbent Nanocomposites Based on Copper, Iron Carbonyl, Carbon Nanofiber, Graphite Nanoflake and Polypyrrole". Journal of Advances in Nanotechnology 1, nr 3 (23.11.2020): 42–55. http://dx.doi.org/10.14302/issn.2689-2855.jan-20-3616.

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The composites of Cu, Carbonyl iron (CI), carbon nanofiber (CNF), graphite nanoflake (GNF)/polypyrrole (PPy) and [(Cu-CI-CNF-GNF) 0.5-PAA]-PPy0.5 were synthesized via different methods by in-situ polymerization on the surface of nanoparticles (NPs) with core-shell structure. This paper describes a method for polyacrylic acid (PAA) coating of NPs in aqueous solution. Then PPy coating was performed by template polymerization on NPs-PAA. Morphology, magnetic and conductivity properties were observed via scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and four probe method, respectively. The microwave characterization of nanocomposite was evaluated through arch test based on a network analyzer. The PPy nanocomposites possessed the excellent microwave multi absorbers properties in 2-18 GHz. It was also found that nanocomposites with 50% w/w and light weight exhibit good microwave absorbing properties in 2-3 GHz and 5-14 GHz frequency, so can be used to cellphone, radio frequency and radar shielding.

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13

Pal, Kaushik, Vinay Panwar, Souvik Bag, James Manuel, Jou-Hyeon Ahn i Jin Kuk Kim. "Graphene oxide–polyaniline–polypyrrole nanocomposite for a supercapacitor electrode". RSC Advances 5, nr 4 (2015): 3005–10. http://dx.doi.org/10.1039/c4ra14614j.

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14

Ke, Rui, Xiaomei Zhang, Lei Wang, Chunyan Zhang, Shengyi Zhang, Changjie Mao, Helin Niu, Jiming Song, Baokang Jin i Yupeng Tian. "Electrochemiluminescence sensor based on Graphene Oxide/Polypyrrole/CdSe nanocomposites". Journal of Alloys and Compounds 622 (luty 2015): 1027–32. http://dx.doi.org/10.1016/j.jallcom.2014.11.058.

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15

Maity, Arjun, i Mukul Biswas. "Alumina-based water-dispersible conducting nanocomposites of polypyrrole and polypyrrole with poly(N-vinylcarbazole)". Journal of Applied Polymer Science 90, nr 4 (27.08.2003): 1058–65. http://dx.doi.org/10.1002/app.12757.

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Zamiri, Golnoush, i A. S. M. A. Haseeb. "Recent Trends and Developments in Graphene/Conducting Polymer Nanocomposites Chemiresistive Sensors". Materials 13, nr 15 (24.07.2020): 3311. http://dx.doi.org/10.3390/ma13153311.

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The use of graphene and its derivatives with excellent characteristics such as good electrical and mechanical properties and large specific surface area has gained the attention of researchers. Recently, novel nanocomposite materials based on graphene and conducting polymers including polyaniline (PANi), polypyrrole (PPy), poly (3,4 ethyldioxythiophene) (PEDOT), polythiophene (PTh), and their derivatives have been widely used as active materials in gas sensing due to their unique electrical conductivity, redox property, and good operation at room temperature. Mixing these two materials exhibited better sensing performance compared to pure graphene and conductive polymers. This may be attributed to the large specific surface area of the nanocomposites, and also the synergistic effect between graphene and conducting polymers. A variety of graphene and conducting polymer nanocomposite preparation methods such as in situ polymerization, electropolymerization, solution mixing, self-assembly approach, etc. have been reported and utilization of these nanocomposites as sensing materials has been proven effective in improving the performance of gas sensors. Review of the recent research efforts and developments in the fabrication and application of graphene and conducting polymer nanocomposites for gas sensing is the aim of this review paper.

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17

Konakov, Artem O., Nadejda N. Dremova, Igor I. Khodos, Marcus Koch, Ekaterina V. Zolotukhina i Yuliya E. Silina. "One-Pot Synthesis of Copper Iodide-Polypyrrole Nanocomposites". Chemosensors 9, nr 3 (16.03.2021): 56. http://dx.doi.org/10.3390/chemosensors9030056.

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A novel one-pot chemical synthesis of functional copper iodide-polypyrrole composites, CuI-PPy, has been proposed. The fabrication process allows the formation of nanodimensional metal salt/polymer hybrid structures in a fully controlled time- and concentration-dependent manner. The impact of certain experimental conditions, viz., duration of synthesis, sequence of component addition and concentrations of the intact reagents on the structure, dimensionality and yield of the end-product was evaluated in detail. More specifically, the amount of marshite CuI within the hybrid composite can be ranged from 60 to 90 wt.%, depending on synthetic conditions (type and concentration of components, process duration). In addition, the conditions allowing the synthesis of nano-sized CuI distributed inside the polypyrrole matrix were found. A high morphological stability and reproducibility of the synthesized nanodimensional metal-polymer hybrid materials were approved. Finally, the electrochemical activity of the formed composites was verified by cyclic voltammetry studies. The stability of CuI-PPy composite deposited on the electrodes was strongly affected by the applied anodic limit. The proposed one-pot synthesis of the hybrid nanodimensional copper iodide-polypyrrole composites is highly innovative, meets the requirements of Green Chemistry and is potentially useful for future biosensor development. In addition, this study is expected to generally contribute to the knowledge on the hybrid nano-based composites with tailored properties.

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18

Kaur Sidhu, Gaganpreet, i Rajesh Kumar. "Study the Structural and Optical behaviour of Conducting Polymer based nanocomposites: ZrO2-Polypyrrole Nanocomposites". IOP Conference Series: Materials Science and Engineering 360 (23.10.2018): 012038. http://dx.doi.org/10.1088/1757-899x/360/1/012038.

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Vigneshwaran, J., Jemini Jose, Siby Thomas, Alessio Gagliardi, Mukundan Thelakkat i Sujin P. Jose. "Flexible quasi-solid-state supercapacitors based on Ti3C2-Polypyrrole nanocomposites". Electrochimica Acta 429 (październik 2022): 141051. http://dx.doi.org/10.1016/j.electacta.2022.141051.

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Njagi, John, i Silvana Andreescu. "Stable enzyme biosensors based on chemically synthesized Au–polypyrrole nanocomposites". Biosensors and Bioelectronics 23, nr 2 (wrzesień 2007): 168–75. http://dx.doi.org/10.1016/j.bios.2007.03.028.

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Suri, Komilla, S. Annapoorni, A. K. Sarkar i R. P. Tandon. "Gas and humidity sensors based on iron oxide–polypyrrole nanocomposites". Sensors and Actuators B: Chemical 81, nr 2-3 (styczeń 2002): 277–82. http://dx.doi.org/10.1016/s0925-4005(01)00966-2.

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Fei Fang, Fei, Hyoung Jin Choi i Jinsoo Joo. "Conducting Polymer/Clay Nanocomposites and Their Applications". Journal of Nanoscience and Nanotechnology 8, nr 4 (1.04.2008): 1559–81. http://dx.doi.org/10.1166/jnn.2008.18224.

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This review aims at reporting on interesting and potential aspects of conducting polymer/clay nanocomposites with regard to their preparation, characteristics and engineering applications. Various conducting polymers such as polyaniline, polypyrrole and copolyaniline are introduced and three different preparation methods of synthesizing conducting polymer/clay nanocomposites are being emphasized. Morphological features, structure characteristics and thermal degradation behavior are explained based on SEM/TEM images, XRD pattern analyses and TGA/DSC graphs, respectively. Attentions are also being paid on conductive/magnetic performances as well as two potential applications in anti-corrosion coating and electrorheological (ER) fluids.

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German, Natalija, Almira Ramanaviciene i Arunas Ramanavicius. "Formation of Polyaniline and Polypyrrole Nanocomposites with Embedded Glucose Oxidase and Gold Nanoparticles". Polymers 11, nr 2 (20.02.2019): 377. http://dx.doi.org/10.3390/polym11020377.

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Several types of polyaniline (PANI) and polypyrrole (Ppy) nanocomposites with embedded glucose oxidase (GOx) and gold nanoparticles (AuNPs) were formed by enzymatic polymerization of corresponding monomers (aniline and pyrrole) in the presence of 6 and 13 nm diameter colloidal gold nanoparticles (AuNPs(6nm) or AuNPs(13nm), respectively) or chloroaurate ions (AuCl4−). Glucose oxidase in the presence of glucose generated H2O2, which acted as initiator of polymerization reaction. The influence of polymerization bulk composition and pH on the formation of PANI- and Ppy-based nanocomposites was investigated spectrophotometrically. The highest formation rate of PANI- and Ppy-based nanocomposites with embedded glucose oxidase and gold nanoparticles (PANI/AuNPs-GOx and Ppy/AuNPs-GOx, respectively) was observed in the solution of sodium acetate buffer, pH 6.0. It was determined that the presence of AuNPs or AuCl4− ions facilitate enzymatic polymerization of aniline and pyrrole.

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Roy, M. "Spectroscopic And Morphological Evaluation Of Gamma Radiation Irradiated Polypyrrole Based Nanocomposites". Advanced Materials Letters 3, nr 5 (1.11.2012): 426–32. http://dx.doi.org/10.5185/amlett.2012.6373.

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Mahore, Ritu P. "Development Of Nanocomposites Based On Polypyrrole And Carbon Nanotubes For Supercapacitors". Advanced Materials Letters 5, nr 7 (1.07.2014): 400–405. http://dx.doi.org/10.5185/amlett.2014.amwc.1038.

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Yin, Mengxuan, Hanwei Du, Yulan Liu, Liang Li i Xianghua Yu. "Improved Thermoelectric Performance of Flexible Film Based on Polypyrrole/Silver Nanocomposites". Journal of Electronic Materials 51, nr 3 (10.01.2022): 1061–67. http://dx.doi.org/10.1007/s11664-021-09356-y.

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Hussain, Syed Tajammul, Faisal Abbas, Ayesha Kausar i Muhammad Riaz Khan. "New polyaniline/polypyrrole/polythiophene and functionalized multiwalled carbon nanotube-based nanocomposites". High Performance Polymers 25, nr 1 (16.08.2012): 70–78. http://dx.doi.org/10.1177/0954008312456048.

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Okan, Burcu Saner, Selmiye Alkan Gürsel i Yuda Yürüm. "Surface Modifications of Graphene-based Polymer Nanocomposites by Different Synthesis Techniques". MRS Proceedings 1451 (2012): 131–36. http://dx.doi.org/10.1557/opl.2012.1455.

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ABSTRACTWith the appropriate surface treatments, graphene sheets can be separated from graphite material and the layer-to-layer distance can be extended. In the present work, graphene nanosheets (GNS) were separated from graphite by an improved, safer and mild method including the steps of oxidation, thermal expansion, ultrasonic treatment and chemical reduction. For the production of advanced polymer nanocomposites, the distinguished properties of GNS were combined with the structural properties of conducting polypyrrole by the proposed simple and low-cost fabrication technique. The changes in surface morphologies and surface functional groups were estimated by controlling the polymer coating on graphite oxide (GO) sheets, expanded GO and GNS.

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Kausar, Ayesha. "Potential of Polymer/Fullerene Nanocomposites for Anticorrosion Applications in the Biomedical Field". Journal of Composites Science 6, nr 12 (16.12.2022): 394. http://dx.doi.org/10.3390/jcs6120394.

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Initially, this review presents the fundamentals of corrosion-resistant polymer/fullerene nanocomposites. Then, the potential of polymer/fullerene nanocomposites for corrosion resistance in biomedical applications is presented. In particular, anticorrosion biomedical applications of fullerene-based nanomaterials are proposed for antimicrobial applications, drug delivery, bioimaging, etc. According to the literature, due to the low conductivity/anticorrosion features of pristine thermoplastic polymers, conjugated polymers (polyaniline, polypyrrole, polythiophene, etc.) with high corrosion resistance performance were used. Subsequently, thermoplastic/thermosetting polymers were filled with nanoparticles to enhance their anticorrosion properties relative to those of neat polymers. Accordingly, fullerene-derived nanocomposites were found to be effective for corrosion protection. Polymer/fullerene nanocomposites with a fine dispersion and interactions revealed superior anticorrosion performance. The formation of a percolation network in the polymers/fullerenes facilitated their electron conductivity and, thus, corrosion resistance behavior. Consequently, the anticorrosion polymer/fullerene nanocomposites were applied in the biomedical field. However, this field needs to be further explored to see the full biomedical potential of anticorrosion polymer/fullerene nanocomposites.

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Ma, Jun, Junaid Ali Syed i Dongyun Su. "Hybrid Supercapacitors Based on Self-Assembled Electrochemical Deposition of Reduced Graphene Oxide/Polypyrrole Composite Electrodes". Journal of Nanoelectronics and Optoelectronics 16, nr 6 (1.06.2021): 949–56. http://dx.doi.org/10.1166/jno.2021.3032.

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Conductive polymers (CPs) have potential application to commercial energy storage because of their high electrochemical activity and low cost. However, an obstacle in developing CP-based supercapacitors is the degradation in their capacitance during the charge-discharge process that leads to poor rate performance. This study fabricates layers of a high-performance self-assembled polypyrrole/reduced graphene oxide (PPY/RGO) composite material on a carbon cloth through electrochemical deposition. The layered graphene improved the electrochemical properties of PPY. Carbon fiber rods were coated with the PPY/RGO composite layer, the thickness of which depends on the deposition time. Adequate capacitive behaviors were achieved by using 16 layers of polypyrrole/reduced graphene oxide, with a specific capacitance of 490 F g−1 (0.6 A g−1) and good rate performance. The results here provide a novel means of preparing graphene-based nanocomposites films for a variety of functions. A symmetric device was subsequently assembled by using electrodes featuring 16 layers of the polypyrrole/reduced graphene oxide composite. It yielded a specific capacitance of 205 F g−1 and a high energy density of 16.4 Wh kg−1. It also exhibited good cycle stability, with a capacitance retention rate of 85% for 5,000 cycles.

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Bozzini, Benedetto, Patrizia Bocchetta, Belén Alemán, Matteo Amati, Alessandra Gianoncelli, Luca Gregoratti, Hikmet Sezen, Antonietta Taurino i Maya Kiskinova. "Electrodeposition and pyrolysis of Mn/polypyrrole nanocomposites: a study based on soft X-ray absorption, fluorescence and photoelectron microspectroscopies". Journal of Materials Chemistry A 3, nr 37 (2015): 19155–67. http://dx.doi.org/10.1039/c5ta05572e.

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Jing, Shengyu, Shuangxi Xing, Lianxiang Yu i Chun Zhao. "Synthesis and characterization of Ag/polypyrrole nanocomposites based on silver nanoparticles colloid". Materials Letters 61, nr 23-24 (wrzesień 2007): 4528–30. http://dx.doi.org/10.1016/j.matlet.2007.02.045.

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Xing, Liwen, Qinfeng Rong i Zhanfang Ma. "Non-enzymatic electrochemical sensing of hydrogen peroxide based on polypyrrole/platinum nanocomposites". Sensors and Actuators B: Chemical 221 (grudzień 2015): 242–47. http://dx.doi.org/10.1016/j.snb.2015.06.078.

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Van Hieu, Nguyen, Nguyen Quoc Dung, Phuong Dinh Tam, Tran Trung i Nguyen Duc Chien. "Thin film polypyrrole/SWCNTs nanocomposites-based NH3 sensor operated at room temperature". Sensors and Actuators B: Chemical 140, nr 2 (lipiec 2009): 500–507. http://dx.doi.org/10.1016/j.snb.2009.04.061.

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Wang, Taoping, Mingtong Li, Hui Zhang, Yunyu Sun i Bin Dong. "A multi-responsive bidirectional bending actuator based on polypyrrole and agar nanocomposites". Journal of Materials Chemistry C 6, nr 24 (2018): 6416–22. http://dx.doi.org/10.1039/c8tc00747k.

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Zhao, Danyang, Yao Zhang, Shaowei Ji, Yao Lu, Xinyu Bai, Mengting Yin, Chusen Huang i Nengqin Jia. "Molecularly imprinted photoelectrochemical sensing based on ZnO/polypyrrole nanocomposites for acrylamide detection". Biosensors and Bioelectronics 173 (luty 2021): 112816. http://dx.doi.org/10.1016/j.bios.2020.112816.

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Ansar, Muhammad Tamoor, Asad Ali, Ghulam M. Mustafa, Fatima Afzal, Saira Ishaq, Farah Kanwal, Shahzad Naseem i Shahid Atiq. "Polypyrrole-based nanocomposites architecture as multifunctional material for futuristic energy storage applications". Journal of Alloys and Compounds 855 (luty 2021): 157341. http://dx.doi.org/10.1016/j.jallcom.2020.157341.

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Bidan, G�rard, Olivier Jarjayes, Jean Marc Fruchart i Etienne Hannecart. "New nanocomposites based on ?tailor dressed? magnetic particles in a polypyrrole matrix". Advanced Materials 6, nr 2 (luty 1994): 152–55. http://dx.doi.org/10.1002/adma.19940060213.

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Rezazadeh, Nader, Abbas Kianvash i Parya Palmeh. "Microwave absorption properties of double-layer nanocomposites based on polypyrrole/natural rubber". Journal of Applied Polymer Science 135, nr 34 (14.05.2018): 46565. http://dx.doi.org/10.1002/app.46565.

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Yang, Zhe, Jinghua Ren, Zhilan Ye, Wei Zhu, Liji Xiao, Li Zhang, Qianyuan He, Zushun Xu i Haibo Xu. "Bio-inspired synthesis of PEGylated polypyrrole@polydopamine nanocomposites as theranostic agents for T1-weighted MR imaging guided photothermal therapy". Journal of Materials Chemistry B 5, nr 5 (2017): 1108–16. http://dx.doi.org/10.1039/c6tb02740g.

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Byeon, Jun-Ho, Ji-Sun Kim, Hyo-Kyung Kang, Sungmin Kang i Jin-Yeol Kim. "Acetone Gas Sensor Based on SWCNT/Polypyrrole/Phenyllactic Acid Nanocomposite with High Sensitivity and Humidity Stability". Biosensors 12, nr 5 (19.05.2022): 354. http://dx.doi.org/10.3390/bios12050354.

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We synthesized core-shell-shaped nanocomposites composed of a single-walled carbon nanotube (SWCNT) and heptadecafluorooctanesulfonic acid-doped polypyrrole (C8F-doped-PPy)/phenyllatic acid (PLA), i.e., C8F-doped-PPy/PLA@SWCNT, for detecting acetone gas with high sensitivity and humidity stability. The obtained nanocomposites have the structural features of a sensing material as a C8F-doped-PPy layer surrounding a single-stranded SWCNT, and a PLA layer on the outer surface of the PPy as a specific sensing layer for acetone. PLA was chemically combined with the positively charged PPy backbone and provided the ability to reliably detect acetone gas at concentrations as low as 50 ppb even at 25 °C, which is required for medical diagnoses via human breath analysis. When C8F was contained in the pyrrole monomer in a ratio of 0.1 mol, it was able to stably detect an effective signal in a relative humidity (RH) of 0–80% range.

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42

Li, Yang, Huitao Ban i Mujie Yang. "Highly sensitive NH3 gas sensors based on novel polypyrrole-coated SnO2 nanosheet nanocomposites". Sensors and Actuators B: Chemical 224 (marzec 2016): 449–57. http://dx.doi.org/10.1016/j.snb.2015.10.078.

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Arena, Antonella, Caterina Branca, Carmine Ciofi, Giovanna D’Angelo, Valentino Romano i Graziella Scandurra. "Polypyrrole and Graphene Nanoplatelets Inks as Electrodes for Flexible Solid-State Supercapacitor". Nanomaterials 11, nr 10 (30.09.2021): 2589. http://dx.doi.org/10.3390/nano11102589.

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Flexible energy storage devices and supercapacitors in particular have become very attractive due to the growing demand for wearable consumer devices. To obtain supercapacitors with improved performance, it is useful to resort to hybrid electrodes, usually nanocomposites, that combine the excellent charge transport properties and high surface area of nanostructured carbon with the electrochemical activity of suitable metal oxides or conjugated polymers. In this work, electrochemically active conducting inks are developed starting from commercially available polypyrrole and graphene nanoplatelets blended with dodecylbenzenesulfonic acid. Films prepared by applying the developed inks are characterized by means of Raman measurements, Fourier Transform Infrared (FTIR) analysis, and Atomic Force Microscopy (AFM) investigations. Planar supercapacitor prototypes with an active area below ten mm2 are then prepared by applying the inks onto transparency sheets, separated by an ion-permeable nafion layer impregnated with lithium hexafluorophospate, and characterized by means of electrical measurements. According to the experimental results, the devices show both pseudocapacitive and electric double layer behavior, resulting in areal capacitance that, when obtained from about 100 mF⋅cm−2 in the sample with polypyrrole-based electrodes, increases by a factor of about 3 when using electrodes deposited from inks containing polypyrrole and graphene nanoplateles.

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Sood, Yuvika, Varsha S. Pawar, Harish Mudila i Anil Kumar. "A review on synthetic strategies and gas sensing approach for polypyrrole‐based hybrid nanocomposites". Polymer Engineering & Science 61, nr 12 (25.10.2021): 2949–73. http://dx.doi.org/10.1002/pen.25822.

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Chen, Pu, Zhihua Zhao, Zhigang Shao, Ye Tian, Bo Li, Bo Huang, Shuaiwen Zhang, Chunbo Liu i Xiaoqing Shen. "Highly selective NH3 gas sensor based on polypyrrole/Ti3C2Tx nanocomposites operating at room temperature". Journal of Materials Science: Materials in Electronics 33, nr 9 (27.01.2022): 6168–77. http://dx.doi.org/10.1007/s10854-022-07792-y.

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Zhou, Kunfeng, Defeng Shen, Xiao Li, Yuhao Chen, Liran Hou, Yishuai Zhang i Jingquan Sha. "Molybdenum oxide-based metal-organic framework/polypyrrole nanocomposites for enhancing electrochemical detection of dopamine". Talanta 209 (marzec 2020): 120507. http://dx.doi.org/10.1016/j.talanta.2019.120507.

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Lu, Xiaofeng, Danming Chao, Jingyu Chen, Wanjin Zhang i Yen Wei. "Preparation and characterization of inorganic/organic hybrid nanocomposites based on Au nanoparticles and polypyrrole". Materials Letters 60, nr 23 (październik 2006): 2851–54. http://dx.doi.org/10.1016/j.matlet.2006.02.002.

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Jing, Shengyu, Shuangxi Xing i Chun Zhao. "Direct synthesis of PbS/polypyrrole core-shell nanocomposites based on octahedral PbS nanocrystals colloid". Materials Letters 62, nr 1 (styczeń 2008): 41–43. http://dx.doi.org/10.1016/j.matlet.2007.04.067.

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Ballav, Nirmalya. "Molybdenum blues based conducting nanocomposites of polypyrrole, polyN-vinylcarbazole and of their binary combination". Materials Science and Engineering: B 123, nr 2 (listopad 2005): 115–22. http://dx.doi.org/10.1016/j.mseb.2005.07.005.

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Das, Dhaneswar, Parag Choudhury, Lakhya Jyoti Borthakur, Isha Ruhulla Kamrupi, Ujjal Gogoi i Swapan Kumar Dolui. "Methanol vapor sensor based on poly(styrene-co-butylacrylate)/polypyrrole-EG core–shell nanocomposites". Sensors and Actuators B: Chemical 199 (sierpień 2014): 320–29. http://dx.doi.org/10.1016/j.snb.2014.03.100.

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