Topic
Smart material
About: Smart material is a research topic. Over the lifetime, 3704 publications have been published within this topic receiving 74280 citations. The topic is also known as: intelligent material & responsive material.
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TL;DR: In this paper, a series of novel polyimides bearing triarylamine and naphthalimide perssad were devised and prepared, which can respond to four different stimuli (light, pH, explosives and voltage) and perform four functions (light detectors, electrochromism, fluorescence detectors and memory devices).
19 citations
29 Aug 2013
TL;DR: Magnetically responsive cellulose composites as mentioned in this paper are a subset of smart materials, in which magnetic nanoparticles are embedded in the polymer matrix, which can adaptively change their physical properties due to an external magnetic field.
Abstract: Magnetically responsive cellulose materials are specific subset of smart materials, in which magnetic nanoparticles are embedded in the polymer matrix, which can adaptively change their physical properties due to an external magnetic field These kind of materials are expected to exhibit interesting magnetic field-dependent mechanical behavior with a wide range of potential applications, such as fibers and fabrics for protective clothing for military use (Raymond et al, 1994), magnetic filters (Pinchuk et al, 1995), sensors (Epstein & Miller, 1996), information storage, static and low frequency magnetic shielding (Dikeakos et al, 2003) and health care or biomedical products (Wang et al, 2004) In general, magnetic cellulose materials can be prepared with different morphologies, such as films, fibers, microspheres, hydrogels and aerogels, and they respond differently to externally applied magnetic field because of the different natures and structures The main purpose of the present review is to overview on recent advances in the development of magnetic fieldresponsive cellulose composites with emphasis on the fabrication, properties and possible applications
19 citations
TL;DR: In this paper, multiwalled nanotubes (MWNT) were suitably incorporated into the cement matrix, which act as actively embedded sensor for monitoring real-time flaws in structures.
Abstract: Smart material reinforced non-destructive structural health monitoring technique has been evolving as the most predominated route for assessing the performance of the civil structures. In the present study, multiwalled nanotubes (MWNT) were suitably incorporated into the cement matrix, which act as actively embedded sensor for monitoring real-time flaws in structures. Initially, the stable homogenous MWNT dispersion was prepared by using ionic surfactant technique with high-intensity ultrasonic agitation process. Since, a suitable and adequate synthesis procedure to incorporate MWNT in cement matrix is essential, but complicated, the role of amplitude and frequency of sonication on dispersion of nanotubes was categorically evaluated. Further, this paper focuses to find out the effect of surfactant on MWNT dispersion by using the UV Visible spectroscopy and by evaluating the effective hydro-dynamic diameter. Based on micromechanics based analytical model, the influence of the interface layer thickness and geometrical configuration of nanotubes on the electrical conductivity of cement nano-composite are also analyzed. Further, the electrical conductivity of MWNT incorporated cement system, as developed in the present study, is measured using four probe method. Piezo-resistivity of the oven dried samples is measured to evaluate the change in potential drop under cyclic loading regime. It is found that the efficiency of the piezo-resistive strain sensors greatly depends on synthesis process and the circuit system. Appropriately proportioned and properly synthesized MWNTs incorporated in cement matrix were capable of providing consistent and steady response under the variable external stress. Thus, the material can be used as embedded sensor for health monitoring and identifying initiation of any damage in reinforced concrete structure.
19 citations
TL;DR: In this article, the authors present a framework to manage the life-cycle cost of smart infrastructure systems, which includes a core model for evaluating the life cycle cost of civil infrastructure systems equipped with smart materials (fiber-reinforced concrete, sensor-embedded materials, etc.).
Abstract: Smart infrastructure systems life-cycle costing has not receive much attention from researchers, albeit its considerable potential and proven success. This paper presents a framework to manage the life-cycle cost of these systems. The framework includes a core model for evaluating the life-cycle cost of civil infrastructure systems equipped with smart materials (fiber-reinforced concrete, sensor-embedded materials, etc.) or intelligent devices (smart valves, smart signals, etc.). The model identifies the basic cost elements that should be considered when evaluating life-cycle costs. In addition, the model identifies design and managerial factors that influence the values of these costs.
19 citations
11 Nov 2016
19 citations