scholarly journals Fast Response PANI/MMT-rGO Polymer Nanocomposite Material for Sensing HCN Gas

2021 ◽  
Author(s):  
Pukhrambam Dipak ◽  
Aparna Singh ◽  
Asif Iqbal ◽  
Anuradha Samadhiya ◽  
Shailendra Kumar Dwivedi ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Surface Area ◽  
Polymer Nanocomposites ◽  
Hydrogen Cyanide ◽  
Binding Sites ◽  
Oxidative Polymerization ◽  
Polymer Nanocomposite ◽  
Fast Response ◽  
Ammonium Persulfate ◽  
Chemical Oxidative Polymerization

Abstract In the present work, we have developed a polymer based gas sensor. The polymer nanocomposites are synthesized by the chemical oxidative polymerization of aniline with ammonium persulfate and sulfuric acid. The fabricated sensor is able to achieve a sensing response of 4.56% for PANI/MMT-rGO at 2 ppm of hydrogen cyanide (HCN) gas. The sensitivity of the sensors PANI/MMT and PANI/MMT-rGO are 0.89 ppm-1 and 1.12 ppm-1 respectively. The increase in the sensitivity of the sensor may be due to an increase in the surface area provided by MMT and rGO which provided more binding sites for the HCN gas. The sensing response of the sensor increases as the concentration of the gas exposed increases but saturates after 10 ppm. The sensor recovers automatically. The sensor is stable and can work for 8 months.

Synthesis and Characterization of Nanocomposite of Copolymer of N-Methyl Pyrrole (NMPy) and N, N-Dimethyl Aniline (NDMA)

2019 ◽  
pp. 124-129
Author(s):  
R. Rathore ◽  
Soni Sharma
Keyword(s):  
Electrical Conductivity ◽  
Surface Morphology ◽  
Oxidative Polymerization ◽  
Polymer Nanocomposite ◽  
Xrd Analysis ◽  
Probe Method ◽  
Synthesis And Characterization ◽  
Chemical Oxidative Polymerization ◽  
Amorphous Nature

Nanocomposite of copolymer of N-Methyl pyrrole (NMPy) and N, N-Dimethyl aniline (NDMA) doped with HCl was synthesized by chemical oxidative polymerization. APS was used as oxidant. The sample was characterized by FTIR, TGA, XRD and four probe method. FTIR confirms the formation of copolymer and its structure. XRD analysis shows the amorphous nature of polymer nanocomposite. The electrical conductivity of sample was measured by using four probe method. Size and surface morphology were demonstrated by SEM.

scholarly journals Facial Synthesis and Characterization of Polypyrrole/zinc oxide (ZnO) Nanorode and Flower-like Shape Composites

2018 ◽  
Vol 34 (1) ◽  
Author(s):  
Sang Nguyen Xuan
Keyword(s):  
Zinc Oxide ◽  
Oxidative Polymerization ◽  
Polymer Nanocomposite ◽  
Synthesis And Characterization ◽  
Chemical Oxidative Polymerization ◽  
Sem Images ◽  
X Ray ◽  
Polymerization Method ◽  
Composite Samples

Polypyrrole (PPy) nanocomposites reinforced with zinc oxide (ZnO) nanorod and nano flower were fabricated by chemical oxidative polymerization method using an ammonium per-sulphate (APS, (NH4)2S2O8) as an oxidizing agent. The polymer nanocomposite were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). The results were compared with pure as-prepared PPy. The SEM images of the nanocomposites show homogeneous dispersion characteristics and different morphologies of ZnO structures such as rod and flower-like shapes.  In the FTIR spectra, composite samples showed characteristic peaks of PPy shifted to higher positions confirmed the interfacial interactions between ZnO and PPy matrix.

scholarly journals Obtaining conductive composites of PANI and thermoplastic polymers

2019 ◽  
pp. 11-15
Author(s):  
Diana Nelly Contreras-Zarazúa ◽  
David Contreras-Lopéz ◽  
Rosalba Fuentes-Ramirez ◽  
Rosario Galindo-González
Keyword(s):  
Cyclic Voltammetry ◽  
Impedance Spectroscopy ◽  
Vinyl Acetate ◽  
Oxidative Polymerization ◽  
Ammonium Persulfate ◽  
Polymerization Process ◽  
Chemical Oxidative Polymerization ◽  
Thermoplastic Polymers ◽  
Conductive Composites ◽  
Polar Monomer

Currently, the polymers industry has gained increasing importance due to the versatility of its properties. In this work were synthesized copolymers of styrene with vinyl acetate at different concentrations through a process polymerization of suspension, which are the starting points for obtaining of composites with polyaniline synthesized PANI chemical oxidative polymerization process, used for doping HCl at a concentration of 1.5 M and ammonium persulfate 0.5 M in a mass radio of 1:1. The conductivity was evaluated by means of cyclic voltammetry and impedance spectroscopy, in order to determine the effect of the concentration of the polar monomer in the composite founded that increase concentration of polar comonomer the conductivity also too.

Ultrasensitive room temperature NH3 sensor based on a graphene–polyaniline hybrid loaded on PET thin film

2015 ◽  
Vol 51 (35) ◽  
pp. 7524-7527 ◽  
Author(s):  
Shouli Bai ◽  
Yangbo Zhao ◽  
Jianhua Sun ◽  
Ye Tian ◽  
Ruixian Luo ◽  
...  
Keyword(s):  
Thin Film ◽  
Room Temperature ◽  
Oxidative Polymerization ◽  
High Sensitivity ◽  
Fast Response ◽  
Chemical Oxidative Polymerization ◽  
Nh3 Sensor ◽  
First Time

A room temperature smart NH3 sensor based on rGO–PANI hybrid loading on flexible PET thin film prepared by in situ chemical oxidative polymerization is reported for the first time. The sensor not only exhibits high sensitivity, good selectivity and fast response but also has flexibility, is inexpensive and has wearable characteristics.

Synthesis of Composites Based on Polyaniline-Modified Dispersed Nanocarbon Supports and Prospects of their Application as Sorbents

2017 ◽  
Vol 13 ◽  
pp. 135-141 ◽  
Author(s):  
Tatyana P. Dyachkova ◽  
Irina V. Anosova ◽  
Evgeny V. Galunin ◽  
Natalia V. Orlova ◽  
Alexey G. Tkachev
Keyword(s):  
Carbon Nanotubes ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Oxidative Polymerization ◽  
Ammonium Persulfate ◽  
Graphene Nanoplatelets ◽  
Catalyst Free ◽  
Pathogenic Organisms ◽  
Carboxylated Carbon Nanotubes

Pristine, catalyst-free and carboxylated carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) were modified with polyaniline via oxidative polymerization of aniline using ammonium persulfate. The effect of the nanocarbon support nature, degree of CNT functionalization and modification conditions on the specific surface area of the obtained composites was studied. Prospects of the application of the polyaniline-modified CNTs-and GNPs-based materials as sorbents for retention of different substances, including pathogenic organisms, were analyzed.

Thermal Degradation Behavior of Polyaniline in Polyaniline/Tunsten Carbide Composite

2012 ◽  
Vol 581-582 ◽  
pp. 719-722
Author(s):  
Hui Huang ◽  
Ren Chun Fu ◽  
Zhong Cheng Guo
Keyword(s):  
Thermal Treatment ◽  
Oxidative Polymerization ◽  
Chain Scission ◽  
Ammonium Persulfate ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
X Ray ◽  
Thermal Degradation Behavior ◽  
Ft Ir ◽  
Ft Raman

Polyaniline/tungsten carbide (PANI/WC) composite was synthesized by chemical oxidative polymerization of aniline using ammonium persulfate as the oxidant and thermal treated in air at 150°C, 250°C, 350°C and 450°C to 2 hours. The changes of structure, crystalline and conductivity were investigated by Fourier Transformed Infrared (FT-IR), Fourier Transformed Raman (FT-Raman), X-Ray Diffraction (XRD) and four-probe technique. The results showed that PANI/WC composite showed much-improved thermal stability compared to pure PANI. But the conductivity of PANI/WC is reduced to some extent (1.73 S/cm, the conductivity is reduced by about 82%) after thermal treated at 250°C, and dropped by 6 orders of magnitude (3.25×10-6S/cm) at 350°C. This may be explained by that only a fraction of dopant losses during thermal treatment at 250°C, but after thermal treatment at 350°C, along with cross-linking, chain scission and oxygen, resulting in destruction of crystal structure, decrease of the emeraldine sequence.

scholarly journals The Effect of Variation Sensitivity Against Time For Magnesium Oxide (MgO) Doped Polyaniline Nanocomposites Influenced By Ammonium Persulfate

2021 ◽  
Author(s):  
MANJUNATHA B ◽  
Rahul Jabnoor ◽  
Sangshetty kalyane
Keyword(s):  
Electrical Properties ◽  
Magnesium Oxide ◽  
Structural Properties ◽  
Oxidative Polymerization ◽  
Ammonium Persulfate ◽  
Chemical Oxidative Polymerization ◽  
X Ray ◽  
Sensor Property ◽  
Doped Polyaniline ◽  
Pani Matrix

Abstract Polyaniline and doped polyaniline was prepared by the method of insitu chemical oxidative polymerization with ammonium persulfate as an oxidant agent. The composite polyaniline was mixing the magnesium oxide and polyaniline with the PANI matrix distributions. Polyaniline composite of MgO characterized like as x-ray diffractometer shows structural properties. The electrical properties of polyaniline and composite polyaniline as a conductivity increases with increase in frequency. The sensor property shows the sensitivity with the help of time obtained the sensitivities values the ranges from 120 to 160% from these composites in 50% composite the sensitivity is high.

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

scholarly journals A Review on Polymer Nanocomposites and Their Effective Applications in Membranes and Adsorbents for Water Treatment and Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 139
Author(s):  
Oluranti Agboola ◽  
Ojo Sunday Isaac Fayomi ◽  
Ayoola Ayodeji ◽  
Augustine Omoniyi Ayeni ◽  
Edith E. Alagbe ◽  
...  
Keyword(s):  
Greenhouse Gases ◽  
Polymer Nanocomposites ◽  
Gas Separation ◽  
Rapid Growth ◽  
Dye Removal ◽  
Anthropogenic Activities ◽  
Polymer Nanocomposite ◽  
Population Increase ◽  
Nanocomposite Membranes

Globally, environmental challenges have been recognised as a matter of concern. Among these challenges are the reduced availability and quality of drinking water, and greenhouse gases that give rise to change in climate by entrapping heat, which result in respirational illness from smog and air pollution. Globally, the rate of demand for the use of freshwater has outgrown the rate of population increase; as the rapid growth in town and cities place a huge pressure on neighbouring water resources. Besides, the rapid growth in anthropogenic activities, such as the generation of energy and its conveyance, release carbon dioxide and other greenhouse gases, warming the planet. Polymer nanocomposite has played a significant role in finding solutions to current environmental problems. It has found interest due to its high potential for the reduction of gas emission, and elimination of pollutants, heavy metals, dyes, and oil in wastewater. The revolution of integrating developed novel nanomaterials such as nanoparticles, carbon nanotubes, nanofibers and activated carbon, in polymers, have instigated revitalizing and favourable inventive nanotechnologies for the treatment of wastewater and gas separation. This review discusses the effective employment of polymer nanocomposites for environmental utilizations. Polymer nanocomposite membranes for wastewater treatment and gas separation were reviewed together with their mechanisms. The use of polymer nanocomposites as an adsorbent for toxic metals ions removal and an adsorbent for dye removal were also discussed, together with the mechanism of the adsorption process. Patents in the utilization of innovative polymeric nanocomposite membranes for environmental utilizations were discussed.

Probing the performance of imide linked micro-porous polymers for enhanced CO2 gas adsorption applications

2021 ◽  
Author(s):  
Narendran Rajendran ◽  
Ali A. Husain ◽  
Saad Makhseed
Keyword(s):  
Surface Area ◽  
Gas Adsorption ◽  
Oxidative Polymerization ◽  
Porous Polymers ◽  
Bet Surface Area ◽  
Co2 Gas

Three new carbazole containing cross-linked polymers namely AH-Poly, TM-PDA-Poly and TMB-PDA-Poly were designed and successfully synthesized by an oxidative polymerization protocol. The prepared AH-Poly showed a specific BET surface area...

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