scholarly journals Thin carbon–polypyrrole composite materials for supercapacitor electrodes by novel bipolar electrochemical setup

2021 ◽  
pp. 2100153
Author(s):  
Nigel Patterson ◽  
Anna Ignaszak
Keyword(s):  
Composite Materials ◽  
Thin Carbon ◽  
Polypyrrole Composite

scholarly journals The development of electrically conductive polycaprolactone fumarate–polypyrrole composite materials for nerve regeneration

Biomaterials ◽  
2010 ◽  
Vol 31 (23) ◽  
pp. 5916-5926 ◽  
Author(s):  
M. Brett Runge ◽  
Mahrokh Dadsetan ◽  
Jonas Baltrusaitis ◽  
Andrew M. Knight ◽  
Terry Ruesink ◽  
...  
Keyword(s):  
Composite Materials ◽  
Nerve Regeneration ◽  
Electrically Conductive ◽  
Polypyrrole Composite

Chiroptical, morphological and conducting properties of chiral nematic mesoporous cellulose/polypyrrole composite films

2017 ◽  
Vol 5 (36) ◽  
pp. 19184-19194 ◽  
Author(s):  
Erlantz Lizundia ◽  
Thanh-Dinh Nguyen ◽  
Jose L. Vilas ◽  
Wadood Y. Hamad ◽  
Mark J. MacLachlan
Keyword(s):  
Composite Materials ◽  
Composite Films ◽  
Cellulose Nanocrystal ◽  
Chemical Polymerization ◽  
Chiral Nematic ◽  
Polypyrrole Composite ◽  
Surface Modified ◽  
Cellulose Composite

Conductive chiral nematic cellulose composite materials have been fabricated via in situ oxidative chemical polymerization of pyrrole onto surface-modified mesoporous cellulose nanocrystal (CNC) films.

Preparation of Fe3O4@polypyrrole Composite Materials for Asymmetric Supercapacitor Applications

2021 ◽  
Author(s):  
Shiyun Li ◽  
Ling Zhang ◽  
Luxi Zhang ◽  
Yuqiong Guo ◽  
Xuecheng Chen ◽  
...  
Keyword(s):  
Composite Materials ◽  
High Capacity ◽  
Core Shell ◽  
Asymmetric Supercapacitor ◽  
Cycle Stability ◽  
The Core ◽  
Polypyrrole Composite ◽  
Supercapacitor Applications

Although Fe3O4 has high capacity, the low conductivity and poor cycle stability have limited its application in supercapacitor. To address this issue, the core-shell structured Fe3O4@polypyrrole (Fe3O4@PPy) composite materials could...

scholarly journals ОСОБЛИВОСТІ ВПЛИВУ НАНОМАТЕРІАЛІВ НА ЕКРАНУВАННЯ ЕЛЕКТРОМАГНІТНОГО ВИПРОМІНЮВАННЯ КОМПОЗИТАМИ

2021 ◽  
Vol 146 (3) ◽  
pp. 155-164
Author(s):  
О. О. Бутенко ◽  
О. В. Черниш ◽  
В. Г. Хоменко ◽  
В. С. Твердохліб ◽  
В. З. Барсуков
Keyword(s):  
Carbon Nanotubes ◽  
Iron Oxide ◽  
Composite Materials ◽  
Boron Carbide ◽  
Electromagnetic Radiation ◽  
Boron Oxide ◽  
Composite Coatings ◽  
Shielding Effect ◽  
Ultrasonic Dispersion ◽  
Thin Carbon

The use of nanomaterials as a composite material to improve the efficiency of a protective coating for shielding against electromagnetic interference. Samples were studied using equipment from Keycom Corp. (Japan) developed for measuring the shielding effect. Ultrasonic dispersion of nanomaterials was performed using a UZDN-A1200T ultrasonic disperser. The resistivity of the composite coatings was measured using a ST2558B-F01 standardized 4-electrode cell. The influence of various nanomaterials on the protective properties of thin carbon-polymer coatings has been established. The following nanomaterials have been investigated: boron oxide and carbide, iron oxide, carbon nanotubes, and graphene. The dependence of the resistivity of the coating and the shielding effect on the type of nanomaterial in the composite sample has been established. It has been experimentally proved that the ultrasonic dispersion can improve the shielding effect by 2.5 times. It has been found that graphene has a slight advantage compared to other carbon materials. Also, our results have been established that non-conductive materials such as nano-oxides of iron, boron, and boron carbide can be quite effective for creating radio-absorbing composite materials. The paper proposes a new approach to obtain thin protective coatings against electromagnetic radiation using nanomaterials such as boron carbide, boron oxide, iron oxide, some types of carbon nanotubes, and graphene. The paper proposes a unique algorithm for the ultrasonic dispersion of nanomaterials for the manufacture of composite materials. For the first time, an analysis of the shielding effect of coatings based on domestic materials using international standardized research methods has been carried out. Composite coatings can primarily be used to protect humans from electromagnetic radiation. The materials can be widely used to solve the problems of shielding premises, equipment, in the military, and medical industries.

The Production of Core-Shell Structure Carboxylated Carbon Nanotubes/Polypyrrole Composite Materials in Different Reaction Media and Further Investigation on their Core-Shell Structure

2017 ◽  
Vol 730 ◽  
pp. 37-41 ◽  
Author(s):  
Hui Li Cao ◽  
Yuan Chang Shi ◽  
Hao Shen ◽  
Hu Dong Zhan ◽  
Jiu Rong Liu
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Composite Materials ◽  
Shell Structure ◽  
Core Shell ◽  
Transmission Electron ◽  
Ft Ir ◽  
Core Shell Structure ◽  
Polypyrrole Composite ◽  
Carboxylated Carbon Nanotubes

In this paper carboxylated carbon nanotubes/polypyrrole composite (CNTs/PPy) was synthesized in different surfactants aqueous under sonication. Carboxylated CNTs was synthesized in hydrogen nitrate by ultrasonic method and coated by PPy. The synthesized CNTs/PPy in different surfactants was evaluated by Fourier transform infrared spectrometer (FT-IR) and transmission electron microscope. The FT-IR patterns illustrate that CNTs were successfully doped by PPy. The morphology of CNTs/PPy synthesized showed on the transmission electron microscope images. The composite materials sythesized without surfactant are easy reunited. It is also found the surface of CNTs/PPy synthesized in cetyl trimethyl ammonium bromide (CTAB) is smoother than that in other surfactants. The coating effect is better with thicker coating layer. The higher magnification of HRTEM images show the PPy was deposited directly on the surface of carbon nanotubes. The final products are the ordered coaxial composite with well-defined core-shell structure.

Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

1974 ◽  
Vol 32 ◽  
pp. 546-547
Author(s):  
R.R. Russell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Great Difficulty ◽  
Ion Milling ◽  
Transmission Electron ◽  
Ion Damage ◽  
Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

Object Wave Determination by Single-Sideband Methods

1973 ◽  
Vol 31 ◽  
pp. 266-267
Author(s):  
Kenneth H. Downing ◽  
Benjamin M. Siegel
Keyword(s):  
Phase Shift ◽  
Carbon Films ◽  
Object Wave ◽  
Electron Wave ◽  
Phase Object ◽  
Heavy Atoms ◽  
Single Sideband ◽  
Thin Carbon ◽  
Additional Phase Shift ◽  
Additional Phase

Under the “weak phase object” approximation, the component of the electron wave scattered by an object is phase shifted by π/2 with respect to the unscattered component. This phase shift has been confirmed for thin carbon films by many experiments dealing with image contrast and the contrast transfer theory. There is also an additional phase shift which is a function of the atomic number of the scattering atom. This shift is negligible for light atoms such as carbon, but becomes significant for heavy atoms as used for stains for biological specimens. The light elements are imaged as phase objects, while those atoms scattering with a larger phase shift may be imaged as amplitude objects. There is a great deal of interest in determining the complete object wave, i.e., both the phase and amplitude components of the electron wave leaving the object.

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