Thermodynamic approach to tailor porosity in piezoelectric polymer fibers for application in nanogenerators

Nano Energy ◽  
2019 ◽  
Vol 62 ◽  
pp. 594-600 ◽  
Author(s):  
Mohammad Mahdi Abolhasani ◽  
Minoo Naebe ◽  
Kamyar Shirvanimoghaddam ◽  
Hossein Fashandi ◽  
Hamid Khayyam ◽  
...  
Keyword(s):  
Polymer Fibers ◽  
Thermodynamic Approach ◽  
Piezoelectric Polymer

scholarly journals PREDICTION OF FUNCTIONAL PARAMETERS FOR A NANOSTRUCTURED POLYMER-CERAMIC COATING ON THE BASIS OF ANODIC OXIDES OF METALS

2020 ◽  
Vol 4 (53) ◽  
pp. 35-42
Author(s):  
Sergey V. SHIL’KO ◽  
◽  
Dmitriy A. CHERNOUS ◽  
Andrey PLIGOVKA ◽  
◽  
...  
Keyword(s):  
Ceramic Coating ◽  
Filler Content ◽  
Micromechanical Model ◽  
Strength Loss ◽  
Polymer Fibers ◽  
Plastic State ◽  
Polymer Filler ◽  
Piezoelectric Polymer ◽  
Nanoporous Anodic Aluminum Oxide ◽  
Maximal Pressure

Strength and strain sensitivity of a thin polymer-ceramic coating in the form of a nanoporous anodic aluminum oxide impregnated with a piezoelectric polymer are studied. The coating is considered as a unidirectionally reinforced composite containing cylindrical polymer fibers oriented perpendicular to the coating surface. A three-phase micromechanical model of the specified material is proposed and the stress-strain state of the coating under the influence of uniformly distributed pressure is analyzed. As a result of solving the related problem of electroelasticity, calculated estimates of the specific piezoelectric sensitivity of the coating used as a pressure sensor and the maximum allowable pressure were obtained according to the strength criteria of the ceramic matrix and the plastic flow of the polymer filler. The article shows dependences of the indicated parameters on the volumetric content of the polymer for the coating, adhesively bonded to a non-deformable foundation and freely (without friction) lying on the foundation. At low volume content of polymer, the strength loss of coating is caused by local failure of matrix. At high filler content the transition of polymer into plastic state precedes to the beginning of matrix failure. After increasing the filler content above 80 % the value of maximal pressure according to yield criteria for polymer filler scarcely changes.

Poling and characterization of piezoelectric polymer fibers for use in textile sensors

2013 ◽  
Vol 201 ◽  
pp. 477-486 ◽  
Author(s):  
Erik Nilsson ◽  
Anja Lund ◽  
Christian Jonasson ◽  
Christer Johansson ◽  
Bengt Hagström
Keyword(s):  
Polymer Fibers ◽  
Piezoelectric Polymer ◽  
Textile Sensors

Polarized microbeam FT-IR analysis of single fibers

1996 ◽  
Vol 54 ◽  
pp. 206-207
Author(s):  
Liling Cho ◽  
David L. Wetzel
Keyword(s):  
Molecular Orientation ◽  
Transition Point ◽  
Polymer Fibers ◽  
Single Fiber ◽  
Wire Grid ◽  
Polyester Fibers ◽  
Ft Ir ◽  
Ir Analysis ◽  
The Relationship ◽  
Wire Grid Polarizer

Polarized infrared microscopy has been used for forensic purposes to differentiate among polymer fibers. Dichroism can be used to compare and discriminate between different polyester fibers, including those composed of polyethylene terephthalate that are frequently encountered during criminal casework. In the fiber manufacturering process, fibers are drawn to develop molecular orientation and crystallinity. Macromolecular chains are oriented with respect to the long axis of the fiber. It is desirable to determine the relationship between the molecular orientation and stretching properties. This is particularly useful on a single fiber basis. Polarized spectroscopic differences observed from a single fiber are proposed to reveal the extent of molecular orientation within that single fiber. In the work presented, we compared the dichroic ratio between unstretched and stretched polyester fibers, and the transition point between the two forms of the same fiber. These techniques were applied to different polyester fibers. A fiber stretching device was fabricated for use on the instrument (IRμs, Spectra-Tech) stage. Tension was applied with a micrometer screw until a “neck” was produced in the stretched fiber. Spectra were obtained from an area of 24×48 μm. A wire-grid polarizer was used between the source and the sample.

Global thermodynamic approach of the molten core-concrete interaction (MCCI) and selected applications in the nuclear field

1997 ◽  
Vol 94 ◽  
pp. 849-860 ◽  
Author(s):  
PY Chevalier ◽  
E Fischer ◽  
B Cheynet ◽  
A Rivet ◽  
G Cenerino
Keyword(s):  
Thermodynamic Approach ◽  
Nuclear Field ◽  
Core Concrete

Fabric Heater Made of Electroconductive Polymer Fibers

2015 ◽  
Vol 135 (9) ◽  
pp. 948-952
Author(s):  
Hiroaki Miura ◽  
Takashi Sunda ◽  
Mutsumi Kimura
Keyword(s):  
Polymer Fibers

Modeling of Contact Patch in Dual-Chamber Pneumatic Tires

2018 ◽  
Vol 46 (2) ◽  
pp. 78-92 ◽  
Author(s):  
A. I. Kubba ◽  
G. J. Hall ◽  
S. Varghese ◽  
O. A. Olatunbosun ◽  
C. J. Anthony
Keyword(s):  
Strain Sensors ◽  
Surface Strain ◽  
Wireless Data ◽  
Data Logger ◽  
Dual Chamber ◽  
Piezoelectric Polymer ◽  
Pure Rolling ◽  
Piezoelectric Elements ◽  
Strain Data ◽  
Deformation Patterns

ABSTRACT This study presents an investigation of the inner tire surface strain measurement by using piezoelectric polymer transducers adhered on the inner liner of the tire, acting as strain sensors in both conventional and dual-chamber tires. The piezoelectric elements generate electrical charges when strain is applied. The inner liner tire strain can be found from the generated charge. A wireless data logger was employed to measure and transmit the measured signals from the piezoelectric elements to a PC to store and display the readout signals in real time. The strain data can be used as a monitoring system to recognize tire-loading conditions (e.g., traction, braking, and cornering) in smart tire technology. Finite element simulations, using ABAQUS, were employed to estimate tire deformation patterns in both conventional and dual-chamber tires for pure rolling and steady-state cornering conditions for different inflation pressures to simulate on-road and off-road riding tire performances and to compare with the experimental results obtained from both the piezoelectric transducers and tire test rig.

A NEW KINETIC AND THERMODYNAMIC APPROACH TO PHENOL BIOSORPTION BY CHITOSAN AND KERATIN

2015 ◽  
Vol 14 (5) ◽  
pp. 1231-1240
Author(s):  
Mauri Sergio Alves Palma ◽  
Attilio Converti ◽  
Milena Nakagawa ◽  
Gisele Pigatto ◽  
Alessandra Lodi ◽  
...  
Keyword(s):  
Thermodynamic Approach
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