Study on Nano Polyaniline / Silver Composite Particles Preparation and Electrical Property

2011 ◽  
Vol 183-185 ◽  
pp. 1712-1716 ◽  
Author(s):  
Wei Guo ◽  
Hang Wu ◽  
Zhen Zhong Zheng ◽  
Qing Chang Chen ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Composite Particle ◽  
Composite Particles ◽  
Pure Pmma ◽  
Dispersion Method ◽  
Nano Silver ◽  
Dispersion Agent ◽  
Silver Composite

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.

Effect of Inorganic Doping on the Thermoelectric Behavior of Polyaniline Nanocomposites

2020 ◽  
Vol 835 ◽  
pp. 200-207
Author(s):  
Mariamu K. Ali ◽  
Ahmed Abd Moneim
Keyword(s):  
Electrical Conductivity ◽  
Conducting Polymers ◽  
Inorganic Nanoparticles ◽  
Inorganic Materials ◽  
Environmental Stability ◽  
Subsequent Reduction ◽  
Preparation Methods ◽  
Reduced Graphene

Polyaniline (PANI) has been considered for thermoelectric (T.E) applications due to its facile preparation methods, easy doping-dedoping processes and its environmental stability. Like other conducting polymers (CPs), it has low thermal conductivity (usually below 1 Wm-1K-1) which is favorable for T.E applications, however studies have shown that it still suffers from low power factors as a result of low electrical conductivity. For this reason, PANI has been compounded with other materials such as polymers, inorganic nanoparticles and carbon nanoparticles to enhance its electrical conductivity, power factors (PF) and ultimately zT value.This work is focused on the synthesis and characterization of n-type polyaniline nanocomposites doped with reduced graphene oxide (rGO). The rGO was prepared through oxidation of graphite and subsequent reduction and incorporated into polyaniline through in situ polymerization and the resulting nanocomposites were characterized. Addition of rGO resulted in enhancement of the electrical conductivity of polyaniline from 10-3 S/cm to 10-1 S/cm which is two orders of magnitude higher. This contributed to the enhanced PF, an indication that thermoelectric behavior of conducting polymers can be boosted through compounding with inorganic materials.

scholarly journals In Situ Structural and Electrical Conductivity Characterization of Sr2MMoO6−δ Double Perovskite Solid Oxide Fuel Cell Anode Materials

2020 ◽  
Vol 3 (6) ◽  
pp. 5353-5360
Author(s):  
Suzanne E. Witt ◽  
Andrew J. Allen ◽  
Ivan Kuzmenko ◽  
Megan E. Holtz ◽  
Sandra Young
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cell ◽  
Anode Materials ◽  
Double Perovskite ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cell Anode ◽  
Fuel Cell Anode

Preparation of Thermosensitive Conducting PANI@P(St-NIPAm) Composite Particles and Conductivity Properties

2020 ◽  
Vol 996 ◽  
pp. 29-34
Author(s):  
Qiang Zhang ◽  
Meng Hao Li ◽  
Ru Xiu Wang ◽  
Jia Jia Song ◽  
Bin Wang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Composite Particles ◽  
Particle Sizes ◽  
Conducting Composite ◽  
Conducting Polyaniline ◽  
Different Temperatures

Thermosensitive conducting composite particles were synthesized using the unsulfonated P(St-NIPAm) as a thermosensitive substrate. A series of characterizations have been performed to study the effects of thermosensitive PANI@poly (St-NIPAm) conductivity performance. Aniline diffused into P(St-NIPAm) particles in solution, and then polyaniline (PANI) was in-situ produced in P(St-NIPAm) particles through oxidation polymerization. The samples showed different particle sizes at different temperatures. The content of conducting polyaniline is dependent on NIPAm feed ratios. The particle electrical conductivity was improved with the increasing NIPAM feed ratios and exhibited thermal responsive electrical conductivity. The thermosensitive conducting composite particles will have wide applications in sensors, for example, they could be used to fabricate smart conductive gel responsive to temperature and moisture.

Novel Ceria-Polymer Composites for Reduced Defects during Oxide CMP

2009 ◽  
Vol 1157 ◽  
Author(s):  
Cecil Coutinho ◽  
Subramanya Mudhivarthi ◽  
Ashok Kumar ◽  
Vinay Gupta
Keyword(s):  
Particle Deposition ◽  
Silicon Oxide ◽  
Surface Defects ◽  
Removal Rate ◽  
Inorganic Nanoparticles ◽  
Composite Particles ◽  
Pure Silica ◽  
Atomic Force

AbstractTo meet the stringent requirements of device integration and manufacture, surface defects and mechanical stresses that arise during chemical mechanic planarization (CMP) must be reduced. Towards this end, we have synthesized multiple hybrid and composite particles on micron length scales consisting of siloxane co-polymers functionalized with inorganic nanoparticles. These particles can be easily tailored during synthesis, leading to softer or harder abrasion when desired. Upon using these particles for the planarization of silicon oxide wafers, we obtain smooth surfaces with reduced scratches and minimal particle deposition, which is an improvement from conventional abrasive materials like pure silica, ceria and alumina nanoparticle slurries. Tribological characteristics during polishing were examined using a bench top CMP tester to evaluate the in situ co-efficient of friction. Characterization of the hybrid and composite particles has been done using infrared spectroscopy, dynamic light scattering, and electron microscopy. Surface roughness of the wafers was examined using atomic force and optical microscopy while removal rate measurements were conducted using ellipsometry at multiple angles.

scholarly journals Preparation and Characterization of Barite/TiO2Composite Particles

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Hong Zhou ◽  
Mengmeng Wang ◽  
Hao Ding ◽  
Gaoxiang Du
Keyword(s):  
Chemical Bond ◽  
Composite Structure ◽  
Composite Powder ◽  
Composite Particle ◽  
Composite Particles ◽  
Oil Absorption ◽  
Structure And Properties ◽  
Chemical Hydrolysis ◽  
Covering Power

To make full use of barite mineral and obtain a kind of composite particles material which has the property of both barite and TiO2, the composite particles material with TiO2coated on the surface of barite particle was prepared by the method of TiOSO4solution chemical hydrolysis and precipitation to form hydrolysis composite, removing the impurities of hydrolysis composite, drying, and calcination in this study. The results were evaluated by the covering power of composites. Composite structure and properties were characterized by means of XRD, SEM, FTIR, and XPS. The results showed that the surface of barite had been coated with rutile TiO2uniformly and compactly and the hiding power value and oil absorption value of the composite powder were 18.50 g/m2and 15.5 g/100 g, respectively, which had similar pigment performances to TiO2. The results also showed that it was mainly the strong chemical bond between barite and TiO2that combined them firmly in barite/TiO2composite particle (B/TCP).

scholarly journals Preparation and characterization of Ni-Cu composite nanoparticles for conductive paints

2019 ◽  
Vol 26 (1) ◽  
pp. 255-260
Author(s):  
Liuyang Bai
Keyword(s):  
Electrical Conductivity ◽  
Electrical Resistivity ◽  
Noble Metals ◽  
Oxidation Potential ◽  
Composite Nanoparticles ◽  
Composite Particles ◽  
Conductive Materials ◽  
Uniform Diameter ◽  
Lower Electrical Resistivity

AbstractNi and Cu are the two most promising alternatives to noble metals used in electrical conductive materials. However, Cu is susceptible to oxidation, while Ni exhibits poorer electrical conductivity. To solve this problem, Cu-Ni composite nanoparticles have been prepared in the present work by successive hydrazine reduction based on the different oxidation potential between Cu (II) and Ni (II). The as-prepared products were characterized by XRD, FE-SEM, EDS, and TG, and the electrical resistivity of which was measured by four-probe method. A formation process of the composite particles was proposed and demonstrated. The Cu-Ni composite nanoparticles have a uniform diameter of about 50nm, and exhibit higher oxidation temperature than Cu and lower electrical resistivity than Ni. This novel Ni-Cu structure and method might help solve the problems associated with the oxidation of Cu and the low electrical conductivity of Ni, which would further promote the application of base metal conductive powders.

CHARACTERIZATION OF TALC/TiO2 COMPOSITE PARTICLE MATERIAL PREPARED BY MECHANO-CHEMICAL METHOD

2020 ◽  
pp. 2050047
Author(s):  
YU LIANG ◽  
WEIHUA AO ◽  
HAO DING ◽  
KAI SHEN
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Chemical Method ◽  
Composite Particle ◽  
Composite Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Talc/TiO2 composite particle was prepared with TiO2 coating on the surfaces of the talc particles by mechano-chemical method. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to investigate the microstructures and morphologies of the composite particles. The mechanism of the mechano-chemical reaction was researched by infrared spectra (IR) and X-ray photoelectron spectroscopy (XPS). The prepared talc/TiO2 composite particle has similar pigment properties compared with TiO2, with its hiding power 10.45[Formula: see text]g/cm3 and whiteness 97.49%. The results show that TiO2 coated evenly on the surfaces of the talc particles by Si–O–Ti and Mg–O–Ti bonds through surface dehydroxylation reaction.

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