Bending Stress Dependent Electrical Resistivity of Carbon Fiber in Polymer for Health Monitoring System

Nishi, Yoshitake; Hirano, Mitsuru

doi:10.2320/matertrans.mra2007105

Cited by 14 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the carbon radicals formed during sliding should be negatively charged and active to electrophiles such as H 2 O, O 2 . As reported by Nishi et al [12], compressive stress caused by bending increases the densities of bonding electron and dangling bonds of carbon fiber. On the other hand, compared with nonpolar O 2 molecule, the electron density distribution of H-O bond in H 2 O molecule is not symmetric and H atom is positively charged because of the higher electronegativity of O atom.…”

Section: Resultsmentioning

confidence: 83%

Gaseous Tribochemical Products of Hydrogenated DLC Film and Stainless Steel Pair in Air Detected by Mass Spectrometry

Ohana

Nakamura

et al. 2015

Tribol Lett

View full text Add to dashboard Cite

A technique for detecting gaseous products in an air atmosphere was achieved based on a quadrupole mass spectrometer and a space-minimized sliding unit settled in a vacuum chamber for the purpose of controlling the flow of sample gas and increasing the concentration of products. The test results showed that when a hydrogenated DLC film was rubbed in a dry air environment, carbons were oxidized to form CO 2 . However, in a humid air atmosphere, water molecules competitively reacted with carbons to form hydrocarbons, so the oxidization of carbons by oxygen was inhibited. The different tribochemistry is thought to play an important role in the tribological behaviors of DLC films.

show abstract

Section: Resultsmentioning

confidence: 83%

Gaseous Tribochemical Products of Hydrogenated DLC Film and Stainless Steel Pair in Air Detected by Mass Spectrometry

Ohana

Nakamura

et al. 2015

Tribol Lett

View full text Add to dashboard Cite

show abstract

“…At present, although various current collectors have been developed, considering the cost and manufacturing process, only Al foil and Cu foil are suitable for commercial development. In the future, with the increase of battery types and the development CNT fiber 8 × 10 −6 [ 224] 1.39 0.027 -822 ± 21 [ 225] Carbon fiber 2.13×10 −5 [ 226] 0.43 0.027 -18 [ 227] of flexible batteries, other current collectors can realize commercial value. Table 3 summarizes the performance of seven different current collector materials in five aspects, including density, electrical resistivity, crustal abundance, cost, and tensile strength.…”

Section: Comparison Of Current Collectorsmentioning

confidence: 99%

MXene‐Based Current Collectors for Advanced Rechargeable Batteries

Wang,

Wei,

Jiang

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

As an indispensable component of rechargeable batteries, the current collector plays a crucial role in supporting the electrode materials and collecting the accumulated electrical energy. However, some key issues, like uneven resources, high weight percentage, electrolytic corrosion, and high‐voltage instability, cannot meet the growing needs for rechargeable batteries. In recent years, MXene‐based current collectors have achieved considerable achievements due to its unique structure, large surface area and high conductivity. The related research has increased significantly. Nonetheless, a comprehensive review of this area is seldom. Herein the applications and progress of MXene in current collector are systematically summarized and discussed. Meanwhile, some challenges and future directions are presented.This article is protected by copyright. All rights reserved

show abstract

“…This paper focuses on the self-sensing ability of continuous carbon fibers to sense strain and damage. Indeed, as carbon fibers and their polymer-matrix composites are electrically conductive materials, they may function themselves as sensor of strain by considering the relationships between their electrical and mechanical behavior [ 1 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. The self-sensing technique is based on changes in electrical resistance caused by strain and also by disruptions of the conductive pathway within the structure of the sensing material [ 13 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Fiber Epoxy Composites for Both Strengthening and Health Monitoring of Structures

Salvado

Lopes

Szojda

et al. 2015

Sensors

View full text Add to dashboard Cite

This paper presents a study of the electrical and mechanical behavior of several continuous carbon fibers epoxy composites for both strengthening and monitoring of structures. In these composites, the arrangement of fibers was deliberately diversified to test and understand the ability of the composites for self-sensing low strains. Composites with different arrangements of fibers and textile weaves, mainly unidirectional continuous carbon reinforced composites, were tested at the dynamometer. A two-probe method was considered to measure the relative electrical resistance of these composites during loading. The measured relative electrical resistance includes volume and contact electrical resistances. For all tested specimens, it increases with an increase in tensile strain, at low strain values. This is explained by the improved alignment of fibers and resulting reduction of the number of possible contacts between fibers during loading, increasing as a consequence the contact electrical resistance of the composite. Laboratory tests on strengthening of structural elements were also performed, making hand-made composites by the “wet process”, which is commonly used in civil engineering for the strengthening of all types of structures in-situ. Results show that the woven epoxy composite, used for strengthening of concrete elements is also able to sense low deformations, below 1%. Moreover, results clearly show that this textile sensor also improves the mechanical work of the strengthened structural elements, increasing their bearing capacity. Finally, the set of obtained results supports the concept of a textile fabric capable of both structural upgrade and self-monitoring of structures, especially large structures of difficult access and needing constant, sometimes very expensive, health monitoring.

show abstract

Bending Stress Dependent Electrical Resistivity of Carbon Fiber in Polymer for Health Monitoring System

Cited by 14 publications

References 7 publications

Gaseous Tribochemical Products of Hydrogenated DLC Film and Stainless Steel Pair in Air Detected by Mass Spectrometry

Gaseous Tribochemical Products of Hydrogenated DLC Film and Stainless Steel Pair in Air Detected by Mass Spectrometry

MXene‐Based Current Collectors for Advanced Rechargeable Batteries

Carbon Fiber Epoxy Composites for Both Strengthening and Health Monitoring of Structures

Contact Info

Product

Resources

About