In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2019-02, No. 51 ( 2019-09-01), p. 2249-2249
Abstract:
High demand on smart materials has ignited extensive academic and industrial research on hybrid materials involving carbon nano-tubes (CNTs) or grapheme-associated materials by replacing the pre-existing single-phase bulk materials. The derivatives are economically available due to tremendous research and development in association with industrial applications. The conducting features can be exploited towards smart sensing for mechanical failure (or even mechanical deformation, functioning as an indicator for safety guidelines. The smart sensing features are tested using alumina-based cements as a matrix material due to the unique characteristic of rapid-setting performance. In particular, the hydrophobic features are modified into hydrophilic ones using rationally-designed dispersing agent materials. The modified CNT solution is mixed with the alumina cement at the predetermined ratios. The degree of microstructural change is probed using the corresponding bulk resistance (or equivalently). Additionally, the mechanical robustness is evaluated based on CNT-based networks involving electronic and ionic conduction along with charge transfer between electronic and ionic conductors using ac-based impedance spectroscopy. The bulk responses involves multi-paths which are made up of CNTs, ionic paths along the interconnected pores filled with high-conductivity solution, and hydrated materials in addition to the original materials in the pristine state. The complicated electrical/dielectric responses are analyzed through the systematic integration of impedance spectroscopy and distribution of relaxation times. The roles of CNT-controlled smart materials are discussed towards the structural health monitoring in structural infrastructures, by taking into account the underlying mechanism involving chemistry and microstructural features of the CNT/alumina cement composite materials. The applicability of CNT-controlled smart materials is discussed towards the structural health monitoring in structural infrastructures, by taking into account the underlying mechanism involving chemistry and microstructural features.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2019-02/51/2249
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2019
detail.hit.zdb_id:
2438749-6
