Academic literature on the topic 'Magnetic field-responsive'
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Journal articles on the topic "Magnetic field-responsive"
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Yang, Qian, Heath H. Himstedt, Mathias Ulbricht, Xianghong Qian, and S. Ranil Wickramasinghe. "Designing magnetic field responsive nanofiltration membranes." Journal of Membrane Science 430 (March 2013): 70–78. http://dx.doi.org/10.1016/j.memsci.2012.11.068.
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Genc, Seval, and Bora Derin. "Field Responsive Fluids - A Review." Key Engineering Materials 521 (August 2012): 87–99. http://dx.doi.org/10.4028/www.scientific.net/kem.521.87.
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Magnetorheological (MR), Electrorheological (ER), and Ferrofluids are considered as a class of smart materials due to their novel behavior under an external stimulus such as a magnetic and electrical field. The behavior of these synthetic fluids offer techniques for achieving efficient heat and mass transfer, damping, drag reduction, wetting, fluidization, sealing, and more. Magnetorheological fluids are suspensions of non-colloidal, multi-domain and magnetically soft particles organic and aqueous liquids. Electrorheological fluids are suspensions of electrically polarizable particles dispersed in electrically insulating oil. Ferrofluids are known as magnetic liquids that are colloidal suspensions of ultrafine, single domain magnetic particles in either aqueous or non-aqueous liquids. In this review article a history of these fluids is given, together with a description of their synthesis in terms of stability and redisperibility and how it is understood in various parts of the science and technology. Then the structural changes and rheological properties of these smart fluids under an external stimulus together with a series of applications are presented.
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Jackson, Julie A., Mark C. Messner, Nikola A. Dudukovic, William L. Smith, Logan Bekker, Bryan Moran, Alexandra M. Golobic, et al. "Field responsive mechanical metamaterials." Science Advances 4, no. 12 (December 2018): eaau6419. http://dx.doi.org/10.1126/sciadv.aau6419.
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Typically, mechanical metamaterial properties are programmed and set when the architecture is designed and constructed, and do not change in response to shifting environmental conditions or application requirements. We present a new class of architected materials called field responsive mechanical metamaterials (FRMMs) that exhibit dynamic control and on-the-fly tunability enabled by careful design and selection of both material composition and architecture. To demonstrate the FRMM concept, we print complex structures composed of polymeric tubes infilled with magnetorheological fluid suspensions. Modulating remotely applied magnetic fields results in rapid, reversible, and sizable changes of the effective stiffness of our metamaterial motifs.
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Takei, Chihiro, Kenji Mori, Takeshi Oshizaka, and Kenji Sugibayashi. "Magnetic Field-Responsive Pulsatile Drug Release Using A Magnetic Fluid." Chemical and Pharmaceutical Bulletin 70, no. 1 (January 1, 2022): 50–51. http://dx.doi.org/10.1248/cpb.c21-00706.
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Zakinyan, Arthur R., Anastasia A. Zakinyan, and Lyudmila S. Mesyatseva. "Thermal percolation in a magnetic field responsive composite." Chemical Physics Letters 813 (February 2023): 140319. http://dx.doi.org/10.1016/j.cplett.2023.140319.
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Phulé, Pradeep P., and John M. Ginder. "The Materials Science of Field-Responsive Fluids." MRS Bulletin 23, no. 8 (August 1998): 19–22. http://dx.doi.org/10.1557/s0883769400030761.
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Scientists and engineers are most familiar with single-crystal or polycrystalline field-responsive or “smart” materials with responses typically occurring while the materials remain in the solid state. This issue of MRS Bulletin focuses on another class of field-responsive materials that exhibits a rapid, reversible, and tunable transition from a liquidlike, free-flowing state to a solidlike state upon the application of an external field. These materials demonstrate dramatic changes in their rheological behavior in response to an externally applied electric or magnetic field and are known as electrorheological (ER) fluids or magnetorheological (MR) fluids, respectively. They are often described as Bingham plastics, and exhibit a strong field-dependent shear modulus and a yield stress that must be overcome to initiate gross material deformation or flow. Prototypical ER fluids consist of linear dielectric particles (such as silica, titania, and zeolites) dispersed in nonconductive liquids such as silicone oils. Homogeneous liquid-crystalline (LC) polymerbased ER fluids have also been recently reported. MR fluids are based on ferromagnetic or ferrimagnetic, magnetically nonlinear particles (e.g., iron, nickel, cobalt, and ceramic ferrites) dispersed in organic or “aqueous liquids. Unlike ER and MR fluids, ferrofluids (or magnetic fluids), which are stable dispersions of nanosized superparamagnetic particulates (~5–10 nm) of such materials as iron oxide, do not develop a yield stress on application of a magnetic field. Applications of ferrofluids are primarily in the area of sealing devices (see Rosensweig for more information). Since ferrofluids are well-known and have been extensively discussed elsewhere in the literature, they will not be treated in detail here.
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Lopez-Lopez, Modesto T., Giuseppe Scionti, Ana C. Oliveira, Juan D. G. Duran, Antonio Campos, Miguel Alaminos, and Ismael A. Rodriguez. "Generation and Characterization of Novel Magnetic Field-Responsive Biomaterials." PLOS ONE 10, no. 7 (July 24, 2015): e0133878. http://dx.doi.org/10.1371/journal.pone.0133878.
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Upadhyaya, Lakshmeesha, Mona Semsarilar, Damien Quemener, Rodrigo Fernández-Pacheco, Gema Martinez, Isabel M. Coelhoso, Suzana P. Nunes, João G. Crespo, Reyes Mallada, and Carla A. M. Portugal. "Block Copolymer-Based Magnetic Mixed Matrix Membranes—Effect of Magnetic Field on Protein Permeation and Membrane Fouling." Membranes 11, no. 2 (February 2, 2021): 105. http://dx.doi.org/10.3390/membranes11020105.
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In this study, we report the impact of the magnetic field on protein permeability through magnetic-responsive, block copolymer, nanocomposite membranes with hydrophilic and hydrophobic characters. The hydrophilic nanocomposite membranes were composed of spherical polymeric nanoparticles (NPs) synthesized through polymerization-induced self-assembly (PISA) with iron oxide NPs coated with quaternized poly(2-dimethylamino)ethyl methacrylate. The hydrophobic nanocomposite membranes were prepared via nonsolvent-induced phase separation (NIPS) containing poly (methacrylic acid) and meso-2,3-dimercaptosuccinic acid-coated superparamagnetic nanoparticles (SPNPs). The permeation experiments were carried out using bovine serum albumin (BSA) as the model solute, in the absence of the magnetic field and under permanent and cyclic magnetic field conditions OFF/ON (strategy 1) and ON/OFF (strategy 2). It was observed that the magnetic field led to a lower reduction in the permeate fluxes of magnetic-responsive membranes during BSA permeation, regardless of the magnetic field strategy used, than that obtained in the absence of the magnetic field. Nevertheless, a comparative analysis of the effect caused by the two cyclic magnetic field strategies showed that strategy 2 allowed for a lower reduction of the original permeate fluxes during BSA permeation and higher protein sieving coefficients. Overall, these novel magneto-responsive block copolymer nanocomposite membranes proved to be competent in mitigating biofouling phenomena in bioseparation processes.
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Teshima, Midori, Takahiro Seki, and Yukikazu Takeoka. "Simple preparation of magnetic field-responsive structural colored Janus particles." Chemical Communications 54, no. 21 (2018): 2607–10. http://dx.doi.org/10.1039/c7cc09464g.
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We established a simple method for preparing Janus particles displaying different structural colors using submicron-sized fine silica particles and magnetic nanoparticles composed of Fe3O4.
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SEE, HOWARD, CLINTON JOUNG, and CHARLES EKWEBELAM. "DYNAMIC BEHAVIOR AND YIELDING OF FIELD-RESPONSIVE PARTICULATE SUSPENSIONS." International Journal of Modern Physics B 21, no. 28n29 (November 10, 2007): 4945–51. http://dx.doi.org/10.1142/s0217979207045876.
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We have examined the small strain response of an inverse ferrofluid system, consisting of micron-sized inert particles dispersed in a ferrofluid, which is a magnetisable liquid consisting of single domain magnetite nanoparticles. Under a magnetic field the inert particles will form elongated aggregates in the field direction, analogous to a magnetorheological fluid. It was found that the fluid appeared to have a Bingham fluid-like yield stress when analysed using the flow curve. However careful study of the behavior at very low shear rates revealed an ever decreasing shear stress. In addition, the behavior of conventional magnetorheological fluids at large strains under steady shear flow and constant magnetic field was also studied, and the results compared to particle-level computer simulations.
Dissertations / Theses on the topic "Magnetic field-responsive"
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Steinbach, Gabi, Michael Schreiber, Dennis Nissen, Manfred Albrecht, Ekaterina Novak, Pedro A. Sánchez, Sofia S. Kantorovich, Sibylle Gemming, and Artur Erbe. "Field-responsive colloidal assemblies defined by magnetic anisotropy." American Physical Society, 2019. https://monarch.qucosa.de/id/qucosa%3A70641.
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Particle dispersions provide a promising tool for the engineering of functional materials that exploit self-assembly of complex structures. Dispersion made from magnetic colloidal particles is a great choice; they are biocompatible and remotely controllable among many other advantages. However, their dominating dipolar interaction typically limits structural complexity to linear arrangements. This paper shows how a magnetostatic equilibrium state with noncollinear arrangement of the magnetic moments, as reported for ferromagnetic Janus particles, enables the controlled self-organization of diverse structures in two dimensions via constant and low-frequency external magnetic fields. Branched clusters of staggered chains, compact clusters, linear chains, and dispersed single particles can be formed and interconverted reversibly in a controlled way. The structural diversity is a consequence of both the inhomogeneity and the spatial extension of the magnetization distribution inside the particles. We draw this conclusion from calculations based on a model of spheres with multiple shifted dipoles. The results demonstrate that fundamentally new possibilities for responsive magnetic materials can arise from interactions between particles with a spatially extended, anisotropic magnetization distribution.
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Denmark, Daniel Jonwal. "Photopolymerization Synthesis of Magnetic Nanoparticle Embedded Nanogels for Targeted Biotherapeutic Delivery." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6827.
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Conventional therapeutic techniques treat the patient by delivering a biotherapeutic to the entire body rather than the target tissue. In the case of chemotherapy, the biotherapeutic is a drug that kills healthy and diseased cells indiscriminately which can lead to undesirable side effects. With targeted delivery, biotherapeutics can be delivered directly to the diseased tissue significantly reducing exposure to otherwise healthy tissue. Typical composite delivery devices are minimally composed of a stimuli responsive polymer, such as poly(N-isopropylacrylamide), allowing for triggered release when heated beyond approximately 32 °C, and magnetic nanoparticles which enable targeting as well as provide a mechanism for stimulus upon alternating magnetic field heating. Although more traditional methods, such as emulsion polymerization, have been used to realize these composite devices, the synthesis is problematic. Poisonous surfactants that are necessary to prevent agglomeration must be removed from the finished polymer, increasing the time and cost of the process. This study seeks to further explore non-toxic, biocompatible, non-residual, photochemical methods of creating stimuli responsive nanogels to advance the targeted biotherapeutic delivery field. Ultraviolet photopolymerization promises to be more efficient, while ensuring safety by using only biocompatible substances. The reactants selected for nanogel fabrication were N-isopropylacrylamide as monomer, methylene bisacrylamide as cross-linker, and Irgacure 2959 as ultraviolet photo-initiator. The superparamagnetic nanoparticles for encapsulation were approximately 10 nm in diameter and composed of magnetite to enable remote delivery and enhanced triggered release properties. Early investigations into the interactions of the polymer and nanoparticles employ a pioneering experimental setup, which allows for coincident turbidimetry and alternating magnetic field heating of an aqueous solution containing both materials. Herein, a low-cost, scalable, and rapid, custom ultraviolet photo-reactor with in-situ, spectroscopic monitoring system is used to observe the synthesis as the sample undergoes photopolymerization. This method also allows in-situ encapsulation of the magnetic nanoparticles simplifying the process. Size characterization of the resulting nanogels was performed by Transmission Electron Microscopy revealing size-tunable nanogel spheres between 50 and 800 nm by varying the ratio and concentration of the reactants. Nano-Tracking Analysis indicates that the nanogels exhibit minimal agglomeration as well as provides a temperature-dependent particle size distribution. Optical characterization utilized Fourier Transform Infrared and Ultraviolet Spectroscopy to confirm successful polymerization. When samples of the nanogels encapsulating magnetic nanoparticles were subjected to an alternating magnetic field a temperature increase was observed indicating that triggered release is possible. Furthermore, a model, based on linear response theory that innovatively utilizes size distribution data, is presented to explain alternating magnetic field heating results. The results presented here will advance targeted biotherapeutic delivery and have a wide range of applications in medical sciences like oncology, gene delivery, cardiology and endocrinology.
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Gupta, Maneesh Kumar. "Stimuli-responsive hybrid nanomaterials: spatial and temporal control of multifunctional properties." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45920.
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Recently, technological advancement and the promise of next-generation devices have created an overwhelming push for the continued miniaturization of active systems to the micro- and nanometer scale. In this regime, traditional mechanical systems are largely inaccessible and as a result new active or stimuli-responsive materials are required. The work presented in this dissertation provides an understanding of the responsive nature of polymer and biopolymer interfaces especially in contact with metal nanoparticles. This understanding was utilized in conjunction with top-down template-based and self-assembly fabrication strategies to create hybrid protein based films and active polymer-metal hybrids that exhibit large and well-defined modulation of mechanical and optical properties. These materials processing developments represent advancement in the current state of the art specifically in three major areas: 1. template-based top-down control of protein chain conformation, 2. high-throughput synthesis and assembly of strongly coupled plasmonic nanoparticles with modulated optical properties (both near- and far-field), 3. field-assisted assembly of highly mobile and non-close packed magnetic nanorods with capabilities for rapid actuation.
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Pooam, Marootpong. "The biological effects of applied magnetic fields on cryptochrome and response." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS062.
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Cryptochromes (cry) sont des flavoprotéines absorbant la lumière bleue conservées qui ont été liées à perception de stimuli électromagnétiques dans de nombreux organismes. Nous avons principalement étudié le mécanisme d'interaction entre les champs magnétiques (MF) et cry dans le cadre de la théorie des paires de radicaux. Nous avons étudié la réponse d'Arabidopsis cry-1 in vivo à MF. Les activités biologiques du cry ont été renforcées par MF. Les effets des MF ont pu être observés même si MF était donné exclusivement pendant les intervalles d'obscurité entre expositions à la lumière. Cette découverte a indiqué que l'étape de réaction magnétiquement sensible dans photocycle du cry doit se produire pendant la réoxydation des flavines. De plus, nous avons également utilisé la fréquence (RF) stimulée par cry-Arabidopsis comme outils de diagnostic pour confirmer l'hypothèse de la paire de radicaux. Dans l'étude, nous avons trouvé un effet perturbateur des RF sur l'activité du cryptochrome. Notre découverte pourrait confirmer l'apparition du mécanisme de la paire de radicaux et l'implication du cry pour la magnétoréception. De plus, nous avons également montré un effet perturbateur de la condition MF statique de bas niveau (LLF) où les champs magnétiques externes étaient presque éliminés. Le résultat de cette condition était cohérent avec l'effet de l'exposition aux RF. En outre, nous avons également signalé que LLF pourrait augmenter l'expression de certains gènes induits par le PEMF dans dans les les cellules humaines. Cette découverte pourrait fournir des preuves à l'appui de l'effet des champs électriques magnétiques et non induits sur la physiologie humaineCryptochromes are highly conserved blue-light-absorbing flavoproteins that have been linked to the perception of electromagnetic stimuli in numerous organisms. We mainly studied the mechanism for the interaction between magnetic fields and cryptochromes in the context of the radical-pair theory. We investigated the response of Arabidopsis cryptochrome-1 in vivo to a static magnetic field. The biological activities of cryptochrome were enhanced by the magnetic field. Interestingly, the effects of the magnetic fields could be observed even the magnetic field was given exclusively during dark intervals between light exposures. This finding indicated that the magnetically sensitive reaction step in the cryptochrome photocycle must occur during flavin reoxidation. Moreover, we also used frequency (RF) stimulated to Arabidopsis cryptochrome as the diagnostic tools to confirm the radical-pair hypothesis. In the study, we found a disruptive effect of RF on the activity of cryptochrome. Our findings could confirm the occurrence of the radical-pair mechanism and the involvement of cryptochrome for magnetoreception. Additionally, we also showed a disruptive effect of the low-level static magnetic field (LLF) condition where the external magnetic fields were almost eliminated. The result of this condition was consistent with the effect of RF exposure. Furthermore, we also reported that LLF could increase the expression of some PEMF-induced genes in human cells. This finding could provide the evidence to support the effect of magnetic, not induced electric fields in human physiology
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Karnaushenko, Daniil. "Shapeable microelectronics." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-205489.
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This thesis addresses the development of materials, technologies and circuits applied for the fabrication of a new class of microelectronic devices that are relying on a three-dimensional shape variation namely shapeable microelectronics. Shapeable microelectronics has a far-reachable future in foreseeable applications that are dealing with arbitrarily shaped geometries, revolutionizing the field of neuronal implants and interfaces, mechanical prosthetics and regenerative medicine in general. Shapeable microelectronics can deterministically interface and stimulate delicate biological tissue mechanically or electrically. Applied in flexible and printable devices shapeable microelectronics can provide novel functionalities with unmatched mechanical and electrical performance. For the purpose of shapeable microelectronics, novel materials based on metallic multilayers, photopatternable organic and metal-organic polymers were synthesized.
Achieved polymeric platform, being mechanically adaptable, provides possibility of a gentle automatic attachment and subsequent release of active micro-scale devices. Equipped with integrated electronic the platform provides an interface to the neural tissue, confining neural fibers and, if necessary, guiding the regeneration of the tissue with a minimal impact. The self-assembly capability of the platform enables the high yield manufacture of three-dimensionally shaped devices that are relying on geometry/stress dependent physical effects that are evolving in magnetic materials including magentostriction and shape anisotropy. Developed arrays of giant magnetoimpedance sensors and cuff implants provide a possibility to address physiological processes locally or distantly via magnetic and electric fields that are generated deep inside the organism, providing unique real time health monitoring capabilities. Fabricated on a large scale shapeable magnetosensory systems and nanostructured materials demonstrate outstanding mechanical and electrical performance. The novel, shapeable form of electronics can revolutionize the field of mechanical prosthetics, wearable devices, medical aids and commercial devices by adding novel sensory functionalities, increasing their capabilities, reducing size and power consumption.
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Zhang, Jiabin. "Smart Materials for Cartilage and Bone Tissue Engineering." Thesis, 2019. http://hdl.handle.net/2440/121917.
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Osteoarthritis (OA) is a chronic disease normally caused by trauma or pathological disorder. Its symptom normally starts from the degeneration of cartilage, resulting in an irregular tough surface, and might progressively extend to subchondral bone, leading to the abnormal joint function and disability. Due to the avascular and condensed structure of cartilage, and the limited number of progenitor cells, it is challenging for regeneration of cartilage defects. Furthermore, because of the distinct structure of cartilage and subchondral bone, stem cell-alone or biomaterial-alone based strategy might not be able to simultaneously fulfil the requirement for regeneration of cartilage and subchondral bone. Hence, in this thesis, a variety of smart materials, such as thermosensitive poly (N-isopropylacrylamide-acrylic acid) hydrogel and magnetic field-responsive scaffold, were fabricated, characterized, and utilized for three-dimensional (3D) culture of mesenchymal stem/stromal cells (MSCs) in vitro. It was found that MSCs showed quite good cell viability and these smart materials promoted the capacity of multi-lineage differentiation due to either functional enhancement of cell aggregates in the thermosensitive hydrogels or synergy of a dynamic magnetic field, mechanical stimulation, structural topography, dynamic culture, extracellular matrix (ECM)-mimicking materials, and inductive biomolecules in the magnetic field-responsive scaffolds. When allogeneic MSC aggregates were delivered in vivo by the thermosensitive hydrogel, osteochondral defects were fully regenerated, which demonstrated that the thermosensitive hydrogel might be a promised vehicle for the delivery of stem cells and facilitate the osteochondral regeneration. Moreover, those autologous chondrogenesis-induced MSCs either in the thermosensitive hydrogel or in the magnetic field-responsive scaffolds were also able to be engineered into a neo-cartilage patch or tissue, respectively, which might also have potential application in cartilage and bone regeneration. In conclusion, the fabricated smart materials including a thermosensitive hydrogel and a magnetic field-responsive scaffold, may assist in stem cell therapy for promising efficacy of OA treatment.Thesis (Ph.D.) -- University of Adelaide, School of Chemical Engineering & Advanced Materials, 2019
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Daniel, Carla Isabel Lopes. "Development and modulation of magnetic responsive supported ionic liquid membranes." Doctoral thesis, 2015. http://hdl.handle.net/10362/16841.
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The work presented in this thesis aims at developing a new separation process based
on the application of supported magnetic ionic liquid membranes, SMILMs, using magnetic ionic liquids, MILs. MILs have attracted growing interest due to their ability to
change their physicochemical characteristics when exposed to variable magnetic field
conditions. The magnetic responsive behavior of MILs is thus expected to contribute for
the development of more efficient separation processes, such as supported liquid membranes, where MILs may be used as a selective carrier. Driven by the MILs behavior, these membranes are expected to switch reversibly their permeability and selectivity by in situ and non-invasive adjustment of the conditions (e.g. intensity, direction vector and uniformity) of an external applied magnetic field.
The development of these magnetic responsive membrane processes were anticipated
by studies, performed along the first stage of this PhD work, aiming at getting a deep
knowledge on the influence of magnetic field on MILs properties. The influence of the
magnetic field on the molecular dynamics and structural rearrangement of MILs ionic
network was assessed through a 1H-NMR technique. Through the 1H-NMR relaxometry
analysis it was possible to estimate the self-diffusion profiles of two different model MILs, [Aliquat][FeCl4] and [P66614][FeCl4]. A comparative analysis was established between the behavior of magnetic and non-magnetic ionic liquids, MILs and ILs, to facilitate the perception of the magnetic field impact on MILs properties. In contrast to ILs, MILs show a specific relaxation mechanism, characterized by the magnetic dependence of their self-diffusion coefficients. MILs self-diffusion coefficients increased in the presence of magnetic field whereas ILs self-diffusion was not affected.
In order to understand the reasons underlying the magnetic dependence of MILs
self-diffusion, studies were performed to investigate the influence of the magnetic field
on MILs’ viscosity. It was observed that the MIL´s viscosity decreases with the increase
of the magnetic field, explaining the increase of MILs self-diffusion according to the
modified Stokes- Einstein equation.
Different gas and liquid transport studies were therefore performed aiming to determine
the influence of the magnetic behavior of MILs on solute transport through SMILMs.
Gas permeation studies were performed using pure CO2 andN2 gas streams and air, using a series of phosphonium cation based MILs, containing different paramagnetic anions.
Transport studies were conducted in the presence and absence of magnetic field at a
maximum intensity of 1.5T. The results revealed that gas permeability increased in the
presence of the magnetic field, however, without affecting the membrane selectivity. The increase of gas permeability through SMILMs was related to the decrease of the MILs viscosity under magnetic field conditions.(...)
Books on the topic "Magnetic field-responsive"
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Kyotani, T., and H. Orikasa. Templated carbon nanotubes and the use of their cavities for nanomaterial synthesis. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.11.
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This article focuses on templated carbon nanotubes (CNTs) and how their cavities can be used for the synthesis of nanomaterials. In particular, it demonstrates how effectively the CNTs can be functionalized by the template carbonization technique. The article first describes the method for synthesizing CNTs and carbon nano-test-tubes (CNTTs). It then considers the controlled filling of magnetic materials into CNTTs, taking into account the electrochemical deposition of Ni-Fe alloy and the magnetic properties of NiFe-filled CNTTs. It also examines the synthesis of water-dispersible and magnetically responsive CNTTs, with emphasis on water dispersibility and the effect of magnetic interaction. Finally, it shows how the cavities of templated CNTs can be utilized as a reaction field for the hydrothermal synthesis of one-dimensional nanomaterials.
Book chapters on the topic "Magnetic field-responsive"
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Hajalilou, Abdollah, Saiful Amri Mazlan, Hossein Lavvafi, and Kamyar Shameli. "Preparation of Magnetic Nanoparticle." In Field Responsive Fluids as Smart Materials, 121–26. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2495-5_10.
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Filipcsei, Genovéva, Ildikó Csetneki, András Szilágyi, and Miklós Zrínyi. "Magnetic Field-Responsive Smart Polymer Composites." In Oligomers # Polymer Composites # Molecular Imprinting, 137–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/12_2006_104.
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Meyer, Shannon, Luke Nickelson, Rakim Shelby, Jon McGuirt, Jian Peng, and Santaneel Ghosh. "Mechanical Characterization of Alternating Magnetic Field Responsive Hydrogels at Micro-scale." In Experimental and Applied Mechanics, Volume 6, 871–72. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9792-0_122.
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Hajalilou, Abdollah, Saiful Amri Mazlan, Hossein Lavvafi, and Kamyar Shameli. "Magnetism." In Field Responsive Fluids as Smart Materials, 5–12. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2495-5_2.
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Jhaveri, Aditi. "Magnetic Field-Responsive Nanocarriers." In Smart Pharmaceutical Nanocarriers, 267–308. IMPERIAL COLLEGE PRESS, 2016. http://dx.doi.org/10.1142/9781783267231_0009.
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Wang, Yixian, Bingsen Jia, Sen Liu, Xinle Yao, and Chufeng Sun. "3D Printing of Smart Materials and Actuators." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220220.
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Smart actuators can sense external stimuli and produce controllable mechanical responses, and convert these energies into mechanical energy. They have great applications in the aerospace, electronic circuits, medical and other fields. As a new manufacturing method, the combination of 3D printing and smart actuators had developed rapidly in recent years. In this paper, we summarize the research progress of 3D printing smart actuators and its materials. The smart driver includes water responsive driver, pH responsive driver, temperature responsive driver, light responsive driver and magnetic field responsive driver. The smart driver materials can be divided into shape memory materials, piezoelectric materials, responsive smart hydrogels and electroactive polymers. In addition, their stimulative effect and driving mechanism have been studied emphatically.
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Misra, R. "Nanoengineered Magnetic Field-Induced Targeted Drug Delivery System With Stimuli-Responsive Release." In Nanotechnology and Drug Delivery, Volume One, 344–60. CRC Press, 2014. http://dx.doi.org/10.1201/b17271-12.
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Shahinpoor, Mohsen. "General Introduction to Smart Materials." In Fundamentals of Smart Materials, 1–12. The Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/bk9781782626459-00001.
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Chapter 1 In this introductory chapter, the spirit and the structure of the book are presented. In general, some fundamental aspects of various smart materials are described, and the stage is set for the coverage of the current family of smart materials as special stimuli-responsive smart materials capable of a variety of actual functions needed for a large family of engineering, scientific, industrial and medical applications. These functions include actuation, energy harvesting, and sensing, plus some other complimentary physical or chemical properties changed by external or internal stimuli such as electric or magnetic fields, fluid-thermal fields, strain and stress fields plus others such as the ionic field within the materials.
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Ilić-Stojanović, Snežana S., Ljubiša B. Nikolić, Vesna D. Nikolić, and Slobodan D. Petrović. "Smart Hydrogels for Pharmaceutical Applications." In Advances in Medical Technologies and Clinical Practice, 278–310. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0751-2.ch011.
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The latest development in the field of smart hydrogels application as drugs carriers is shown in this chapter. Hydrogels are three-dimensional polymer network consisting of at least one hydrophilic monomer. They are insoluble in water, but in the excess presence of water or physiological fluids, swell to the equilibrium state. The amount of absorbed water depends on the chemical composition and the crosslinking degree of 3D hydrogel network and reaches over 1000% of the xerogel weight. Stimuli-responsive hydrogels exhibit significant change of their properties (swelling, color, transparency, conductivity, shape) due to small changes in the external environment conditions (pH, ionic strength, temperature, light wavelength, magnetic or electric fields, ultrasound, or a combination thereof). This smart hydrogels, with different physical and chemical properties, chemical structure and technology of obtaining, show great potential for application in the pharmaceutical industry. The application of smart hydrogels is very promising and at the beginning of the development and exploitation.
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Ilić-Stojanović, Snežana S., Ljubiša B. Nikolić, Vesna D. Nikolić, and Slobodan D. Petrović. "Smart Hydrogels for Pharmaceutical Applications." In Materials Science and Engineering, 1133–64. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1798-6.ch044.
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The latest development in the field of smart hydrogels application as drugs carriers is shown in this chapter. Hydrogels are three-dimensional polymer network consisting of at least one hydrophilic monomer. They are insoluble in water, but in the excess presence of water or physiological fluids, swell to the equilibrium state. The amount of absorbed water depends on the chemical composition and the crosslinking degree of 3D hydrogel network and reaches over 1000% of the xerogel weight. Stimuli-responsive hydrogels exhibit significant change of their properties (swelling, color, transparency, conductivity, shape) due to small changes in the external environment conditions (pH, ionic strength, temperature, light wavelength, magnetic or electric fields, ultrasound, or a combination thereof). This smart hydrogels, with different physical and chemical properties, chemical structure and technology of obtaining, show great potential for application in the pharmaceutical industry. The application of smart hydrogels is very promising and at the beginning of the development and exploitation.
Conference papers on the topic "Magnetic field-responsive"
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Pan, Yayue, and Lu Lu. "Additive Manufacturing of Magnetic Field-Responsive Smart Polymer Composites." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8865.
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In this paper, an additive manufacturing process, named Magnetic Field-assisted Projection Stereolithography (M-PSL), is presented for applications such as fabricating magnetic field-responsive smart polymer composites. The 3D printed magnetic field-responsive smart polymer composite creates a wide range of motions, opening up possibilities for various new applications, like sensing and actuation in soft robotics, biomedical devices, and autonomous systems. In M-PSL process, a certain amount of nano- or micro-scale ferromagnetic particles is deposited into resin vat with a programmable microdeposition nozzle. Then a magnetic field is applied to direct the magnetic particles to the desired area. After that, digital mask images are used to cure particles in photopolymer with certain patterns. Important issues like magnetic particle movements, curing mechanisms, and manufacturing process planning are discussed. Two test cases, an impeller and a two-wheel roller, have been successfully fabricated for remote control under external magnetic field, showing the capability of printed smart polymer composites on performing desired functions.
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Sunakoda, Katsuaki, Naoki Yamamoto, Hiroshi Nasuno, and Hirohisa Sakurai. "Investigation on the Dynamic Shearing Characteristics of Magnetic Responsive Gel." In ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-4945.
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Material which would be largely changed its physical properties such as storage modulus and loss modulus under magnetic field has a potential of application on industrial fields. Magneto-rheological (MR) fluid has been widely studied since its viscosity is changed under magnetic field, but it is restricted for application of the industrial fields as it has liquid nature. Authors are proceeding with the development of magnetic responsive gels which contain the magnetic responsive particles in consideration of their prior studies. Three kinds of magnetic gels are selected and dynamic shearing characteristics are examined. Storage modulus and loss modulus are obtained under different dynamic frequencies and different magnetic fluxes. Some physical properties such as storage modulus and loss modulus are largely changed by applying magnetic field. The developed gels have an effect of energy dissipation, judging from hysteresis loops of stress-strain. And these smart materials have a potential of semi active vibration control materials.
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Ahmed, Saad, Carlye Lauff, Adrienne Crivaro, Kevin McGough, Robert Sheridan, Mary Frecker, Paris von Lockette, et al. "Multi-Field Responsive Origami Structures: Preliminary Modeling and Experiments." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12405.
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The use of origami principles to create 3-dimensional shapes has the potential to revolutionize active material structures and compliant mechanisms. Active origami structures can be applied to a broad range of areas such as reconfigurable aircraft and deployable space structures as well as instruments for minimally invasive surgery. Our current research is focused on dielectric elastomer (DE) and magneto active elastomer (MAE) materials to create multi-field responsive structures. Such multi-field responsive structures will integrate the DE and MAE materials to enable active structures that fold/unfold in different ways in response to electric and/or magnetic field. They can also unfold either as a result of eliminating the applied field or in response to the application of an opposite field. This concept is demonstrated in a folding cube shape and induced locomotion in the MAE material. Two finite element models are developed for both the DE and MAE materials and validated through physical testing of these materials. The models are then integrated to demonstrate multi-field responses of a bi-fold multi-field responsive structure. The bifold model is designed to fold about one axis in an electric field and a perpendicular axis in a magnetic field. Future modeling efforts and research directions are also discussed based on these preliminary results.
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Sunakoda, Katsuaki, Shin Morishita, Seiichi Takahashi, and Toshiyuki Hakata. "Development and Testing of Hybrid Magnetic Responsive Fluid for Vibration Damper." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77651.
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A new intelligent fluid is studied and developed. Rheological characteristics of the developed fluid change rapidly and can be controlled in the presence of an applied magnetic field. The developed fluid is a hybrid type fluid, and it consists consisting of carbonyl irons and super fine magnetite. Average diameters of carbonyl iron and super fine magnetite are a size in the order of a few microns and about 10 nano-meters respectively. Special treatment is made by coating the surface of carbonyl iron with super fine magnetite. Physical properties such as dispersion stability and thixotropical characteristics are examined. Shearing stress and pressure drops of the new fluid flow are examined and evaluated by changing the strength of magnetic fields. A small capacity damper is made, and damping tests are performed using the new fluids and also commercial MR fluid. Dynamic properties of the damper are evaluated. As a result of a series of studies, the developed hybrid magnetic responsive fluid is expected to be used as an intelligent fluid.
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Masoud, Hassan, Alexander Kilimnik, and Alexander Alexeev. "Regulating Motion of Magnetic Capsules in Microfluidic Systems." In ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13244.
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Magnetic microcapsules are often used as vesicles in targeted drug delivery systems, where focused magnetic field propels the capsules to highly specific locations in tissue. To fully realize this potential it is important to understand the dynamics of magnetically-responsive micrometer sized particles in viscous fluids and the effect of boundaries on particle motion. Furthermore, for practical biomedical applications, it could be useful to create synthetic micrometer-sized vesicles able to perform controlled self-propelled motion. Herein, using computer simulations, we examine the motion of magnetically-responsive synthetic microcapsules that able to crawl along walls in microchannels filled with a viscous fluid. The compliant fluid-filled capsules considered in this study encompass superparamagnetic nanoparticles in their solid shells and, therefore, can be manipulated by alternating magnetic forces.
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Makhoul-Mansour, Michelle, Elio J. Challita, and Eric C. Freeman. "Ferrofluid Droplet Based Micro-Magnetic Sensors and Actuators." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3841.
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A recent achievement in the droplet interface bilayer (DIB) technique is the ability to link multiple lipid-encased aqueous droplets in an oil medium to construct a membrane-based network. Highly flexible, efficient and durable compared to other lipid bilayer modeling techniques, these systems establish a framework for the creation of biocompatible and stimuli-responsive smart materials with applications ranging from biosensing to reliable micro-actuation. Incorporating ferrofluids droplets into this platform has proven to accelerate the networks’ building mechanism through remote magnetic-control of the droplets movement and has reduced the likelihood of failure during the pre-network-completion phase. Additionally, ferrofluid drops may be placed in the final network structure as they are macroscopically homogenous and behave as single phased liquids. Due to their paramagnetic characteristics, no residual magnetization is observed in the ferrofluid upon removal of the external magnetic field, allowing for simple control of the magnetically responsive droplets. Aside from the ferrofluids reliability in contact-free manipulation of bilayer networks, this work shows a different feature of having such hybrid ferrofluid-water DIB networks: magnetic-sensibility and actuation. Once pre-structured mixed networks are formed, a magnetic source is used to generate various magnetic fields in the vicinity of the DIB webs; changes in structural responses are then observed and used to induce protein channel gating in DIB networks channeling the functionality of a switch. Tailored architectures are accordingly evaluated and their suitability for the creation of microfluidic-magneto sensors and actuators is assessed.
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Brahmbhatt, Khushboo, Wujun Zhao, Zhaojie Deng, Leidong Mao, and Eric Freeman. "Magnetically Responsive Droplet Interface Bilayer Networks." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-9029.
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This work explores incorporating ferrofluids with droplet interface bilayer (DIB) membranes. Ferrofluids contain magnetic nanoparticles in solution with a stabilizing surfactant, providing a magnetically-responsive fluid. These fluids allow for remote mechanical manipulation of ferrofluid droplets through magnetic fields, and will allow for better control over the characteristics of networks of stimuli-responsive cellular membranes created through by DIB technique. This work involves several phases. First, a suitable biocompatible ferrofluid is synthesized, containing a neutral pH and a biocompatible surfactant. Once a proper ferrofluid is identified, it is tested as the aqueous phase for the creation of DIB membranes. Interfacial membranes between ferrofluid droplets are created and compared to non-ferrofluid DIB membranes. The interfacial membrane between two ferrofluid droplets was tested for leakage and stability, and the electrical characteristics of the interfacial membrane were studied and compared to non-ferrofluid DIB membranes. Once it is confirmed that the ferrofluid droplets do not negatively interfere with the formation of the artificial cellular membranes through the electrical measurements, the magnetically-responsive nature of the ferrofluid droplets are used to form large networks of DIB membranes through a simple magnetic field. These networks are easy to assemble and may be remotely manipulated, providing a significant step towards the rapid and simple assembly of DIB networks advancing towards the tissue scale.
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Erol, Anil, Paris von Lockette, and Mary Frecker. "Parameter Study of a Multi-Field Actuated, Multilayered, Segmented Flexible Composite Beam." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8215.
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Multi-layered, self-actuated devices have been the focus of recent studies due to their ability to exhibit large displacements and achieve complex shapes. Such devices have been constructed using active materials responsive to varying stimuli including electro-active and magneto-active materials to perform useful functions or satisfy objective functions related to target shapes. In this work, the authors seek to study the utility of employing materials responsive to magnetic and electric fields in combination with passive materials, and with varied placement in discrete layers and segments through a flexible beam, to design structures capable of satisfying a variety of objective functions simultaneously. These multi-field responsive composite devices, with greater complexity of the embedded combined actuation mechanisms, are able to achieve a wider variety of target shapes compared to traditional unimorph/bimorph structures actuated by a single-field. Additionally, the increased actuation design space facilitates consideration of a wider range of possible objective functions including those related to power consumption, materials’ cost, and work performed. Fabrication of these devices for experimentation is both time-consuming and expensive. As a result, this study will utilize an existing one-dimensional model for electromagnetically-actuated composites and expand its features to include segmentation: the arbitrary placement of any active or passive material type in any layer of a given arbitrarily-sized section of the beam. Ultimately, the goal of this study is to analyze the model by varying characteristic features of multi-field actuated, multi-layered, and segmented devices undergoing large displacements under simultaneously applied fields. Although the model is written arbitrarily for any number of segments, layers within segments, and material types, this study focuses on a base model comprising three material types: electroactive polymer, magneto-active elastomer, and a passive substrate. The initial parameters chosen for the study are the relative lengths (length ratio) of segments, volume of magnetic material, and stiffness of passive material. Two objective functions are chosen. The first is a target shape approximation function, dependent on the errors between the displacements of the computed and the desired shapes. The second calculates a cost based on volume of magnetic material. The effects of the parameters on the objective functions are analyzed by evaluating an array of combinations of parameters; results indicate that each parameter significantly influences the multi-field actuation of the beam, and these correlations are quantitatively analyzed and compared. Concurrently, metrics of power required, structure mass, and other important factors are quantified. As a result, this analysis serves as a precursor to a formal optimization algorithm by determining the usefulness of the chosen objective functions and corresponding input variables for these devices, while also identifying other possible metrics for the design optimization of a multi-field beam.
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Nasuno, Hiroshi, Yotsugi Shibuya, Hiroshi Sodeyama, and Katsuaki Sunakoda. "Shear Vibration Property of Magnetically-Responsive Gels in Magnetically Open Looped System." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3090.
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This paper deals with dynamic shear deformation characteristics of magnetically-responsive (MR) gels under inhomogeneous magnetic fields. Magnetic particles as Fe-Si-Ni type which is generally known as permalloy, were dispersed in silicone gel to prepare the MR composite. An external magnetic field is applied only to one side of the MR gel by using magnetically open-looped circuit, and different excitation frequencies with constant shear strain amplitude is also applied to MR gels with each different thickness. The shear displacement-force relation of MR gel in open-looped circuit were observed, and mechanical properties such as storage and loss moduli were evaluated from experimental data. As a result, it is found that the characteristics change to a large extent depending on the applied magnetic field and the thickness of the MR gel.
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Lu, Lu, Erina Baynojir Joyee, and Yayue Pan. "Investigation of the Correlation Between Micro-Scale Particle Distribution in 3D Printing and Macroscopic Composite Performance." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-3074.
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To date, various multi-material and multi-functional Additive Manufacturing technologies have been developed for the production of multi-functional smart structures. Those technologies are capable of controlling the local distributions of materials, hence achieving gradient or heterogeneous properties and functions. Such multi-material and multi-functional manufacturing capability opens up new applications in many fields. However, it is still largely unknown that how to design the localized material distribution to achieve the desired product properties and functionalities. To address this challenge, the correlation between the micro-scale material distribution and the macroscopic composite performance needs to be established. In our previous work, a novel Magnetic-field-assisted Stereolithography (M-PSL) process has been developed, for fabricating magnetic particle-polymer composites. Hence, in this work, we focus on the study of magnetic-field-responsive particle-polymer composite design, with the aim of developing some guidelines for predicting the magnetic-field-responsive properties of the composite fabricated by M-PSL process. Micro-scale particle distribution parameters, including particle loading fraction, particle magnetization, and distribution patterns, are investigated. Their influences on the properties of particle-polymer liquid suspensions, and the properties of the 3D printed composites, are characterized. By utilizing the magnetic anisotropy properties of the printed composites, different motions of the printed parts could be triggered at different relative positions under the applied magnetic field. Physical models are established, to predict the particle-polymer liquid suspension properties and the trigger conditions of fabricated parts. Experiments are performed to verify the physical models. The predicted results agree well with the experimental measurements, indicating the effectiveness of predicting the macroscopic composite performance using micro-scale distribution data, and the feasibility of using the physical models for guiding the multi-material and multi-functional composite design.
Reports on the topic "Magnetic field-responsive"
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Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing, and Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38721.
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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.