دانلود رایگان مقاله لاتین توپولوژیکی الاستومر مگنتورئوجیکال از سایت الزویر
عنوان فارسی مقاله:
افزایش رسانای سه بعدی ساختار توپولوژیکی الاستومر مگنتورئوجیکال به سمت یک سنسور فشار
عنوان انگلیسی مقاله:
The conductive three dimensional topological structure enhanced magnetorheological elastomer towards a strain sensor
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Because of their reversibly switching rheological properties under an external magnetic field, magnetorheological elastomers (MREs) have attracted great interest for a broad range of applications in architecture, vibration control, noise reduction, automotive industry, suspension system, bushings, absorbers etc. [1e6]. MREs are mainly fabricated by exposing mixtures of polymer matrix and soft magnetic particles to a magnetic field. The soft magnetic particles become oriented along the magnetic field direction and form linear structures. Over the past decade, various studies have been done to improve the mechanical properties of MRE, however, there are few studies on the development of novel applications using MREs. Flexible, highly sensitive and low-cost tensile sensors were highly desirable in portable and foldable devices [7e9]. Very recently, it was found that the flexible tensile sensor-integrated MREs could generate signals to reflect the strength of tensile strain imposed on the MRE-based devices. This characteristic is very important in MRE application because these devices could identify the mechanical state of the MRE component. To this end, several flexible tensile and pressure magnetorheological (MR) sensors had been fabricated. Huang et al. enhanced the electrical properties of magnetorheological fluid (MRF) by coating silver on CIPs. The enhanced electrical properties open a new way to realize the electrical control of MRF [10]. Tian et al. investigated the sensing capabilities of graphite-based MRE experimentally and theoretically. The graphite MREs showed a resistance change when an external load is applied to the MRE sample. Using this feather of MREs, the external stress signal can be converted to a resistance signal, which can potentially be used in a force sensor [11]. Unfortunately, the manufacture of these flexible sensors were complicated and expensive, thus their practical application was limited. Moreover, although these newly developed conductive MREs have been used as flexible conductors and strain sensors, their resistance sensitivity to the displacement was not stable. Over the past decade, three-dimensional (3D) porous-geometry materials have been introduced to many smart materials to enhance the mechanical properties [12]. Plastomers, elastomers and tissues incorporated with 3D geometry scaffolds have been used in sandwich beam [13], tissue engineering [14], conductive applications [15,16] and so on. Polyurethane sponges (PUSs) are a typical commercially available 3D porous polymer with low density, high porosity, high absorption ability and good elasticity [17]. Integrating spontaneous and non-spontaneous orientation-ordered materials such as nematic liquid crystals, ferromagnetic, ferroelectric materials in devices based on porous structure such as PUS had been a subject of considerable research recent years[18e21]. These previous work indicated that the MR effects of the MR plastomer could be enhanced by introducing the 3D PUS. These use of 3D PUSs offers many other advantages, such as porous [22], strong continuous absorption [23,24], significant internal surface area [25], good biocompatibility [26,27]. Furthermore, the inter-connective network of the 3D porous geometric material is effective in forming conductive routes in the materials. Therefore, the materials with this conductive 3D porous geometry such as zeolites [28], wool fibers [29] and sponges [30] have been applied to the fabrication of sensors owing to their combinational electronic conductivities and mechanical flexibilities. Combing the conductive 3D porous geometry with traditional MREs may result in a conductive MRE with good mechanical properties and high electronic conductivities. To this end, the development of conductive 3D porous network-strengthened MREs would attract special interest not only because of their fundamental significance but also because of their practical applications. In this study, a conductive PUS was incorporated into a carbonyl iron particle (CIP)-doped polydimethylsiloxane (PDMS) matrix to develop a novel strain-sensitive MRE. The MRE exhibited good dynamic properties because the 3D continuous porous sponge strengthened the inner structure. The influences of magnetic field and CIP content on the mechanical properties were investigated. The MR effect of the MRE was analyzed and the formation mechanism is discussed and this simple fabrication method provides a possible method for fabricating highly sensitive and low-cost strain sensors.
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کلمات کلیدی:
The conductive three dimensional topological structure enhanced ... www.sciencedirect.com/science/article/pii/S0266353816307011 by L Ge - 2016 - Cited by 3 - Related articles Oct 27, 2016 - Conductive magnetorheological elastomers (MREs) consisting of carbonyl iron particles (CIPs), polydimethylsiloxane matrix and carbon ... The conductive three dimensional topological structure enhanced ... https://www.researchgate.net/.../308303619_The_conductive_three_dimensional_topolo... The conductive three dimensional topological structure enhanced magnetorheological elastomer towards a strain sensor on ResearchGate, the professional ... Stretchable polyurethane sponge reinforced magnetorheological ... iopscience.iop.org/article/10.1088/0964-1726/24/3/037001/meta by L Ge - 2015 - Cited by 5 - Related articles Feb 3, 2015 - Carlson J D and Jolly M R 2000 MR fluid, foam and elastomer devices ... three dimensional topological structure enhanced magnetorheological ... Shear properties of a magnetorheological elastomer - IOPscience iopscience.iop.org/article/10.1088/0964-1726/12/1/316 by GY Zhou - 2003 - Cited by 236 - Related articles Jan 29, 2003 - Davis L C 1999 Model of magnetorheological elastomers J. Appl. Phys. ... dimensional topological structure enhanced magnetorheological ... Shear properties of a magnetorheological elastomer - IOPscience iopscience.iop.org/0964-1726/12/1/316/ Jan 29, 2003 - The conductive three dimensional topological structure enhanced magnetorheological elastomer towards a strain sensor. Lin Ge et al 2016 ... X-ray micro-tomographic characterization of field-structured ... iopscience.iop.org/article/10.1088/0964-1726/21/1/015005/meta by D Günther - 2011 - Cited by 49 - Related articles Dec 7, 2011 - Anisotropic magnetorheological elastomers (MREs) with four different ... The conductive three dimensional topological structure enhanced ...
