Relevant bibliographies by topics / Ordered Nanocomposite

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Ordered Nanocomposite'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Ordered Nanocomposite"

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Chen, Guangming, Zongneng Qi, and Deyan Shen. "Shear-induced ordered structure in polystyrene/clay nanocomposite." Journal of Materials Research 15, no. 2 (February 2000): 351–56. http://dx.doi.org/10.1557/jmr.2000.0055.

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A shear-induced ordered structure in an exfoliated polystyrene (PS)/clay nanocomposite is reported. X-ray diffraction (XRD), transmission electron microscopy (TEM), and infrared dichroism techniques have been employed to investigate the shear-induced ordered structure in the exfoliated PS/clay nanocomposite. Compared with the broad amorphous peaks before extrusion, a series of sharp diffraction peaks were observed in XRD pattern for the extruded PS/clay nanocomposite pellet sample, showing that an ordered structure occurred under shear flow. TEM images confirmed directly that the origin of the ordered structure was mainly due to the planar orientation of the primary particles of silicate layers as well as local ordered microstructure of the primary particles, induced by shear flow. The infrared dichroism study indicated that the phenyl group of PS apparently oriented parallel to the film surface, whereas no obvious orientation of the aliphatic chain could be observed. Based on these investigations, a possible mechanism was deduced for the formation of the ordered structure induced by shear flow in the exfoliated PS/clay nanocomposite.
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Kausar, Ayesha. "Polymeric nanocomposites reinforced with nanowires: Opening doors to future applications." Journal of Plastic Film & Sheeting 35, no. 1 (August 15, 2018): 65–98. http://dx.doi.org/10.1177/8756087918794009.

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This article presents a state-of-the-art overview on indispensable aspects of polymer/nanowire nanocomposites. Nanowires created from polymers, silver, zinc, copper, nickel, and aluminum have been used as reinforcing agents in conducting polymers and non-conducting thermoplastic/thermoset matrices such as polypyrrole, polyaniline, polythiophene, polyurethane, acrylic polymers, polystyrene, epoxy and rubbers. This review presents the combined influence of polymer matrix and nanowires on the nanocomposite characteristics. This review shows how the nanowire, the nanofiller content, the matrix type and processing conditions affect the final nanocomposite properties. The ensuing multifunctional polymer/nanowire nanocomposites have high strength, conductivity, thermal stability, and other useful photovoltaic, piezo, and sensing properties. The remarkable nanocomposite characteristics have been ascribed to the ordered nanowire structure and the development of a strong interface between the matrix/nanofiller. This review also refers to cutting edge application areas of polymer/nanowire nanocomposites such as solar cells, light emitting diodes, supercapacitors, sensors, batteries, electromagnetic shielding materials, biomaterials, and other highly technical fields. Modifying nanowires and incorporating them in a suitable polymer matrix can be adopted as a powerful future tool to create useful technical applications.
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Zhang, Yi He, Qing Song Su, Li Yu, Li Bing Liao, Hong Zheng, Hai Tao Huang, Guo Ge Zhang, Ying Bang Yao, Cindy Lau, and Helen Lai Wah Chan. "Preparation of Low-K Fluorinated Polyimide/Phlogopite Nanocomposites." Advanced Materials Research 47-50 (June 2008): 987–90. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.987.

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Phlogopite with layered silicate structure had been firstly chemically modified via an in situ intercalation method, and phlogopite-polymer nanocomposite films were prepared from 2,2'-bis (3,4-dicarboxyphenyl) hexafluropropane dianhydride (6FDA) and oxydimethyl aniline (ODA) in N,N-dimethylacetamide as a solvent by using in-situ polymerization process combined with ultrasonic dispersion and multi-step curing. The structure of phlogopite minerals and its polymer nanocomposites were characterized by X-ray diffraction (XRD) and infrared spectra (FTIR) respectively. The experimental results indicated that the phlogopites with layered nanostructure had lost their ordered structure and had been exfoliated or intercalated. Thereafter, they were dispersed randomly in the polyimide matrix. The dependence of dielectric properties and thermal stabilities of the nanocomposite films on the phlogopite content and frequency were studied.
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Masuda, Hideki, Kenji Yasui, Mitsuo Watanabe, Kazuyuki Nishio, Tata N. Rao, and Akira Fujishima. "Fabrication of Ordered Diamond/metal Nanocomposite Structures." Chemistry Letters 29, no. 10 (October 2000): 1112–13. http://dx.doi.org/10.1246/cl.2000.1112.

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Lunn, Jonathan D., and Daniel F. Shantz. "Peptide Brush—Ordered Mesoporous Silica Nanocomposite Materials." Chemistry of Materials 21, no. 15 (August 11, 2009): 3638–48. http://dx.doi.org/10.1021/cm901025n.

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Andrieux, Sébastien, Lilian Medina, Michael Herbst, Lars A. Berglund, and Cosima Stubenrauch. "Monodisperse highly ordered chitosan/cellulose nanocomposite foams." Composites Part A: Applied Science and Manufacturing 125 (October 2019): 105516. http://dx.doi.org/10.1016/j.compositesa.2019.105516.

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Zhao, Ziguang, Ruochen Fang, Qinfeng Rong, and Mingjie Liu. "Bioinspired Nanocomposite Hydrogels with Highly Ordered Structures." Advanced Materials 29, no. 45 (October 23, 2017): 1703045. http://dx.doi.org/10.1002/adma.201703045.

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Matsumoto, Taki, Nobuo Iyi, Yoshiro Kaneko, Kenji Kitamura, Satoru Masaki, Tomohito Imai, Wataru Sugimoto, Yoshio Takasu, and Yasushi Murakami. "Preparation of a transparent and flexible self-standing film of layered titania/isostearate nanocomposite." Journal of Materials Research 20, no. 5 (May 2005): 1308–15. http://dx.doi.org/10.1557/jmr.2005.0165.

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A titania-based self-standing film with high transparency and flexibility was successfully prepared via a sol-gel process, in which a titanium tetraisopropoxide/isostearate complex (precursor), n-hexylammonium isostearate (catalyst), and o-xylene (solvent) were used. The sol obtained by the sol-gel reaction was floated on a water surface to form an unsupported film. This film was composed of a titania/isostearate nanocomposite with ordered layer structure. The basal spacings of the nanocomposites depended on the chain length of the carboxylate modifier.
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Tao, Bai Rui, Feng Juan Miao, and Yong Jie Zheng. "Preparation and Characterization of Electrochemical Glucose Sensor Based on Nickel Electrodes Supported by Silicon Microchannel Plates." Applied Mechanics and Materials 138-139 (November 2011): 1126–31. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.1126.

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A novel nickel nanocomposite electrode supported by 3D ordered silicon microchannel plates (MCP) had been reported and its electrocatalytic toward the oxidation of glucose for sensor had been studied. The 3D ordered Si MCP electrodes were first fabricated by electrochemical etching and then Nickel nanoparticles were deposited onto the sidewall of the MCP via electroless deposition followed by annealing at 300°C for 300 s under argon to stabilize the structure. The morphology of the Ni/Si-MCP electrode was characterized by Scanning electron microscope (SEM) and X-ray diffraction (XRD). The electrochemical methods were employed to investigate the Ni/Si-MCP materials. The Ni/Si-MCP nanocomposites exhibit superior electrocatalytic properties towards glucose electro-oxidation in alkaline solutions, in addition to showing excellent long-term stability and good reproducibility.
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Qin, Yuyang, Qingyu Peng, Yue Zhu, Xu Zhao, Zaishan Lin, Xiaodong He, and Yibin Li. "Lightweight, mechanically flexible and thermally superinsulating rGO/polyimide nanocomposite foam with an anisotropic microstructure." Nanoscale Advances 1, no. 12 (2019): 4895–903. http://dx.doi.org/10.1039/c9na00444k.

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Dissertations / Theses on the topic "Ordered Nanocomposite"

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Santos, Peter J. (Peter Jeffries). "Self-assembling nanocomposite Tectons for ordered superlattices." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127907.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 260-280).
Nanocomposites, materials of heterogeneous composition with at least one of the phases having dimensions between 1-100 nm, can be produced with unique properties dependent on their composition and geometric configuration. However, it is a major challenge to precisely and simultaneously design the structure of synthetic nanocomposites at the nanoscale, microscale, and macroscale. To create advanced nanocomposites in which both structure and composition can be programmed across these disparate size regimes, we have developed a new nanoparticle-based building block, the Nanocomposite Tecton (NCT). An NCT consists of an inorganic nanoparticle core and a polymeric shell, with each chain terminating in a supramolecular binding group at the periphery of the NCT.
As each NCT contains both an inorganic nanoparticle and a polymer phase, each building block is itself a nanocomposite, and the incorporation of supramolecular binding groups allows for the directed assembly of NCTs that contain complementary binding groups. These reversible supramolecular interactions enable the assembly of NCTs into ordered arrays, and the collective behavior of the binding groups can be regulated by the dynamics of the polymer chains. The NCTs are capable of rapidly self-assembling into several different crystalline phases that are determined by the design of the building block, and are resilient against dispersity in the molecular weight of the polymer brush and the diameter of the nanoparticle cores. NCTs have been synthesized with both gold and iron oxide nanoparticle cores, indicating the ability to produce NCTs at reasonable scales.
Moreover, the incorporation of multiple nanoparticle compositions allows for the synthesis of NCT-based materials with plasmonic and magnetic properties that can affect, as well as be affected by, the assembly process. We further demonstrate that the crystallization kinetics can be modulated to induce the assembly of NCTs into faceted crystallites with micron-sized diameters, and the resulting NCT crystallites can be post-processed into bulk solids with arbitrary macroscopic shape and controlled grain size. The NCT design concept is therefore a highly modular and versatile building block capable of fabricating materials with controlled structures at the levels of atomic composition and molecular geometry, nanoscale organization, microstructure, and macroscopic form.
by Peter J. Santos.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Materials Science and Engineering
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Fulvio, Pasquale Fernando. "Synthesis and Characterization of Ordered Mesoporous Inorganic Nanocomposite Materials." Kent State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=kent1258990927.

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Yoo, Suk Joon. "Organic-inorganic nanocomposite membranes from highly ordered mesoporous thin films for solubility-based separations." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1070.

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Brewer, Darcy M. J. "Electrodeposited metal nanocomposite catalysts utilizing the hexagonally ordered two-dimensional nanochannel arrays of anodic alumina." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0007/MQ45924.pdf.

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Kulkarni, Sunil. "Mechanically Robust Ordered Nanocomposites Exhibiting a NIR Bandgap." Diss., Temple University Libraries, 2009. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/22207.

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Chemistry
Ph.D.
This dissertation reports a simple route to synthesis nanostructured composites by immobilizing colloidal crystals (CCs) of monodisperse SiO2 spheres in crosslinked polymer network. The resulting ordered nanocomposites exhibited the highest modulus reported yet, to the best of our knowledge, for similar materials. The ordered nanocomposites were optically active and the Bragg diffracted light in a NIR region and wavelength of the Bragg peak could be tuned simply by changing the silica concentration in the composite. They also exhibited intense angle dependent iridescence.
Temple University--Theses
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Bowman, Michelle Kathleen. "Controlling Sub-Microdomain Structure in Microphase-Ordered Block Copolymers and Their Nanocomposites." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-05092008-155151/.

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Block copolymers exhibit a wealth of morphologies that continue to find ubiquitous use in a diverse variety of mature and emergent (nano)technologies, such as photonic crystals, integrated circuits, pharmaceutical encapsulents, fuel cells and separation membranes. While numerous studies have explored the effects of molecular confinement on such copolymers, relatively few have examined the sub-microdomain structure that develops upon modification of copolymer molecular architecture or physical incorporation of nanoscale objects. This work will address two relevant topics in this vein: (i) bidisperse brushes formed by single block copolymer molecules and (ii) copolymer nanocomposites formed by addition of molecular or nanoscale additives. In the first case, an isomorphic series of asymmetric poly(styrene-b-isoprene-b-styrene) (S1IS2) triblock copolymers of systematically varied chain length has been synthesized from a parent SI diblock copolymer. Small-angle x-ray scattering, coupled with dynamic rheology and self-consistent field theory (SCFT), reveals that the progressively grown S2 block initially resides in the I-rich matrix and effectively reduces the copolymer incompatibility until a critical length is reached. At this length, the S2 block co-locates with the S1 block so that the two blocks generate a bidisperse brush (insofar as the S1 and S2 lengths differ). This single-molecule analog to binary block copolymer blends affords unique opportunities for materials design at sub-microdomain length scales and provides insight into the transition from diblock to triblock copolymer (and thermoplastic elastomeric nature). In the second case, I explore the distribution of molecular and nanoscale additives in microphase-ordered block copolymers and demonstrate via SCFT that an interfacial excess, which depends strongly on additive concentration, selectivity and relative size, develops. These predictions are in agreement with experimental findings. Moreover, using a poly(styrene-b-methyl methacrylate) (SM) diblock copolymer with an order-disorder transition temperature (TODT) of 186°C, we find that the addition of clustered and discrete nanoparticles of varying size and surface selectivity can cause TODT to generally decrease, but occasionally increase. Also experimenting with a poly(styrene-b-isoprene) (SI) diblock copolymer with an TODT of 116°C, we find that the addition of smaller nanoparticles at small volume fractions effect the TODT more profoundly. The latter unexpected results are likewise predicted by SCFT and provide a unique strategy by which to improve the nanostructure stability of block copolymers by physical means.
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Wang, Baochun Verfasser], Martin [Akademischer Betreuer] Möller, and Andrij Z. [Akademischer Betreuer] [Pich. "Nanocellulose/polymer nanocomposites with ordered structures / Baochun Wang ; Martin Möller, Andrij Pich." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1125972882/34.

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Wang, Baochun [Verfasser], Martin [Akademischer Betreuer] Möller, and Andrij Z. [Akademischer Betreuer] Pich. "Nanocellulose/polymer nanocomposites with ordered structures / Baochun Wang ; Martin Möller, Andrij Pich." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://nbn-resolving.de/urn:nbn:de:hbz:82-rwth-2016-012745.

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Wang, Baochun [Verfasser], Martin Akademischer Betreuer] Möller, and Andrij Z. [Akademischer Betreuer] [Pich. "Nanocellulose/polymer nanocomposites with ordered structures / Baochun Wang ; Martin Möller, Andrij Pich." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1125972882/34.

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Horechyy, Andriy. "Ordered Structures from Nanoparticles/Block Copolymer Hybrids: Ex-situ Approaches toward Binary and Ternary Nanocomposites." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-70685.

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Within the field of modern technology, nanomatrials, such as nanoparticles (NP), nanorods (NR), quantum dots (QD) etc. are, probably, the most prominent and promising candidates for current and future technological applications. The interest in nanomaterials arise not only form the continuous tendency towards dimensions minimisation of electronic devices, but also due to the fact, that new and, often, unique properties are acquired by the matter at the length scale between 1 and 100 nm. The ability to organize nanoparticles into ordered arrays extends the range of useful NP-based systems that can be fabricated and the diversity of functionalities they can serve. However, in order to successfully exploit nanoparticle assemblies in technological applications and to ensure efficient scale-up, a high level of direction and control is required. Recently, block copolymers (BCP) have attracted much attention as a powerful and very promising tool for creation of nanoscale ordered structures owing to their self-assembling properties. In addition, these systems offer the possibility to fabricate nanostructured composite materials via incorporation of certain nanoadditives (i.e. NPs). The concept is that by selective inclusion of the nanoparticles into one of the blocks of a self-assembling copolymer, the nanoparticles are forced into a defined spatial arrangement determined by the phase morphology of the block copolymer. In present work self-assembling phenomena of block copolymers was exploited to fabricate binary (NP/BCP) and ternary (NP1/NP2/BCP) composites, filled with pre-synthesized nanoparticles of various nature. Polystyrene-block-polyvinylpyridine block copolymers (PS-b-PVP) of various composition and molecular weight were used for fabrication of nanocomposites. The first part of the thesis focuses on fabrication of functional BCP-based composites containing magnetic nanoparticles (MNP), selectively assembled within one of the blocks of BCP matrix. Magnetic nanoparticles (MNPs) were selected among others since, as for today, there is the least number of successful results reported in literature on their selective incorporation into one of the phases of a BCP matrix. From the application point of view fabrication of periodic arrays of “magnetic domains” with periodicity on nanometer scale is also of interest for potential use in high-density magnetic data storage devices. For this purpose, ferrite-type MNP (Fe3O4, CoFe2O4) having apparent affinity toward polyvinylpyridine (PVP) phase were prepared using simple one-pot synthesis. Highly selective nanoparticles segregation into PVP domains of BCP was achieved owing to the presence of sparse stabilizing organic shell on the nanoparticles surface. Importantly, as-prepared MNPs did not require any additional surface modification step to acquire affinity towards PVP phase. Appropriate selection of annealing conditions allowed to produce patterns of nearly perfect degree of lateral order over relatively large surface large area (more than 4 sq µm). The second task of present work was fabrication of ternary NP1/NP2/BCP hybrid composites with two different types of nanoparticles being selectively localized in different microdomains of phase segregated block copolymer matrix. So far as only few studies have been reported on developing of approaches toward ternary composites, creation of alternative and straight forward routes toward such systems is still a challenge. In the frame of this part of present work, silver nanoparticles (AgNPs) covered with polystyrene shell were prepared, with the purpose to be incorporated into polystarene phase of phase separated PS-b-PVP block copolymer matrix. Two different approaches were tested to achieve desired three-component system. First, supposed simple blending of block copolymer and two kinds of nanoparticles having specific affinity toward different blocks of BCP in common solvent. After preparation of MNP/AgNP/BCP composite thin film and subsequent solvent vapour annealing, different domains of microphase segregated PS-b-PVP BCP were filled with different type of nanoparticles. Alternatively, step-wise approach for nanoparticles incorporation was developed and implemented for successful selective nanoparticles incorporation. For this purpose polystyrene stabilized AgNPs (i.e. NP1) were initially mixed with PS-b-PVP BCP to produce composite thin films having nanoparticles selectively located within PS microdomains, while citrate-stabilized second type nanoparticles (i.e NP2) were deposited from their aqueous solutions into PVP domains of AgNP/PS-b-PVP composites. By partition of nanoparticles incorporation procedure into two distinct steps it was also possible to increase effective loading of each type of NPs into BCP matrix.
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Books on the topic "Ordered Nanocomposite"

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Brewer, Darcy M. J. Electrodeposited metal nanocomposite catalysts utilizing the hexagonally ordered two-dimensional nanochannel arrays of anodic alumina. Dept of Chemistry, U of Toronto, 1999.

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Araújo, Ana Cláudia Vaz de. Síntese de nanopartículas de óxido de ferro e nanocompósitos com polianilina. Brazil Publishing, 2021. http://dx.doi.org/10.31012/978-65-5861-120-2.

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In this work magnetic Fe3O4 nanoparticles were synthesized through the precipitation method from an aqueous ferrous sulfate solution under ultrasound. A 23 factorial design in duplicate was carried out to determine the best synthesis conditions and to obtain the smallest crystallite sizes. Selected conditions were ultrasound frequency of 593 kHz for 40 min in 1.0 mol L-1 NaOH medium. Average crystallite sizes were of the order of 25 nm. The phase obtained was identified by X-ray diffractometry (XRD) as magnetite. Scanning electron microscopy (SEM) showed polydisperse particles with dimensions around 57 nm, while transmission electron microscopy (TEM) revealed average particle diameters around 29 nm, in the same order of magnitude of the crystallite size determined with Scherrer’s equation. These magnetic nanoparticles were used to obtain nanocomposites with polyaniline (PAni). The material was prepared under exposure to ultraviolet light (UV) or under heating, from dispersions of the nanoparticles in an acidic solution of aniline. Unlike other synthetic routes reported elsewhere, this new route does not utilize any additional oxidizing agent. XRD analysis showed the appearance of a second crystalline phase in all the PAni-Fe3O4 composites, which was indexed as goethite. Furthermore, the crystallite size decreases nearly 50 % with the increase in the synthesis time. This size decrease suggests that the nanoparticles are consumed during the synthesis. Thermogravimetric analysis showed that the amount of polyaniline increases with synthesis time. The nanocomposite electric conductivity was around 10-5 S cm-1, nearly one order of magnitude higher than for pure magnetite. Conductivity varied with the amount of PAni in the system, suggesting that the electric properties of the nanocomposites can be tuned according to their composition. Under an external magnetic field the nanocomposites showed hysteresis behavior at room temperature, characteristic of ferromagnetic materials. Saturation magnetization (MS) for pure magnetite was ~ 74 emu g-1. For the PAni-Fe3O4 nanocomposites, MS ranged from ~ 2 to 70 emu g-1, depending on the synthesis conditions. This suggests that composition can also be used to control the magnetic properties of the material.
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Book chapters on the topic "Ordered Nanocomposite"

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Andrieux, Sébastien. "Monodisperse Highly Ordered Nanocomposite Foams." In Springer Theses, 91–103. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27832-8_5.

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Hayashi, Noriko, and Tetsuo Kondo. "Enzymatically Produced Nano-ordered Elements Containing Cellulose Iβ Crystalline Domains of Cladophora Cellulose." In Handbook of Polymer Nanocomposites. Processing, Performance and Application, 1–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-45232-1_58.

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Chen, D., and L. Zhang. "Harmonic Vibration of Inclined Porous Nanocomposite Beams." In Lecture Notes in Civil Engineering, 497–501. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_52.

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AbstractThis work investigated the linear harmonic vibration responses of inclined beams featured by closed-cell porous geometries where the bulk matrix materials were reinforced by graphene platelets as nanofillers. Graded and uniform porosity distributions combined with different nanofiller dispersion patterns were applied in the establishment of the constitutive relations, in order to identify their effects on beam behavior under various harmonic loading conditions. The inclined beam model comprised of multiple layers and its displacement field was constructed using Timoshenko theory. Forced vibration analysis was conducted to predict the time histories of mid-span deflections, considering varying geometrical and material characterizations. The findings may provide insights into the development of advanced inclined nanocomposite structural components under periodic excitations.
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Pud, Alexander A., Nikolay A. Ogurtsov, and Olga S. Kruglyak. "Influence of dopant on the specific features of formation and properties of nanocomposites of poly(3-methylthiophene) with polyvinylidene fluoride." In NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING, 159–74. PH “Akademperiodyka”, 2021. http://dx.doi.org/10.15407/akademperiodyka.444.159.

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The work is devoted to the development and study of conducting nanocomposites of poly(3-methylthiophene) (P3MT) and poly(vinylidene fluoride) (PVDF), suitable for changing properties when interaction with of the environment components, and to find factors of influence on properties of such materials. The kinetic aspects of P3MT formation in the process of 3-methylthiophene (3MT) polymerization in PVDF dispersions in the presence of dopants of different nature, in particular, chloride (Cl-), as well as surface-active dodecylbenzenesulfonate (DBS-) and perfluorooctanoate (PFO-) anions are studied. It is found that DBS- and PFO- anions inhibit 3MT oxidation and decrease P3MT yield in comparison with those of chloride anions. It is shown that P3MT is formed through two consecutive kinetically different reactions of pseudo-first order in terms of the oxidant concentration. Transmission electron microscopy revealed that as a result of such polymerization nanoparticles of doped P3MT formed a surface inhomogeneous layer on PVDF particles, thus forming nanocomposite particles with core-shell morphology. Thermal studies showed higher thermal stability of the doped P3MT phase in the nanocomposite compared to the pure polymer. It is found that thermal stability of the P3MT phase in the PVDF/P3MT-DBS nanocomposites is higher than in the PVDF/P3MT-Cl. The influence of the dopant nature and content of doped P3MT on conductivity and sensitivity of the nanocomposites to vapors of harmful volatile organic compounds (acetone and isopropanol) is characterized. The strongest responses to acetone are shown by the nanocomposite with PFO- dopant. In the DBS- dopant case medium intensity responses are found and the lowest ones are observed for Cl- dopant. It is shown that the sensitivity of nanocomposites extremely depends on the conducting polymer content.
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"Influence Fractal Structure on Proton Conductance of Hybrid Organic-Inorganic Nanocomposites." In Polymer-Inorganic Nanostructured Composites Based on Amorphous Silica, Layered Silicates, and Polyionenes, 81–91. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-7998-9728-6.ch004.

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In this chapter, the authors present correlation of fractal structure and protonic conductivity of solid inorganic and organo-inorganic phosphorosilicate nanocomposites which were obtained by the sol-gel method. The optimal ratio of H3PO4: Si(OEt)4 is stated to be 1: 1. It significantly enhances the proton conductivity of the phosphorosilicate sol-gel nanocomposite, it being stable in a wide temperature range (20 – 140 ºC) at the level of 10-3 – 10-5 Ohm-1•cm-1. The addition of a small amount of polyonenes (8 ∙ 10-4 mole polyionene I-1/1 mole tetraethoxysilane) leads to increasing the proton conductivity of nanocomposites by 1-2 orders of magnitude. The maximum value of proton conductivity is stated in nanocomposites most resistant to hydration at temperatures of 200-400 ºC.
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"Evolution of Organic-Inorganic Nanocomposites During Gel Formation." In Polymer-Inorganic Nanostructured Composites Based on Amorphous Silica, Layered Silicates, and Polyionenes, 57–80. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-7998-9728-6.ch003.

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In this chapter, the authors present results of the study of evolution of organic-inorganic nanocomposites during gel formation from sols based on tetraethoxysilane; orthophosphoric acid and a number of polyonenes were studied. Schemes of multilevel fractal aggregation of inorganic nanocomposite and organic-inorganic nanocomposites are suggested according to SAXS data. It was shown that formation of surface fractal aggregates is stated at all structural levels. Mass fractal aggregates are generated on the second structural level (100 – 300 nm). A generation of the initial silicophosphate composite starts from the formation of practically spherical aggregates with order of 12 nm which forms compact lattice of the inorganic polymer on the kind of mass fractal with average particle size of 80 nm on the higher scale level. On the third level this structure occurs to be reorganized with forming of surface fractal clusters with very smooth surface and average particle size of 470 nm. Formation of surface fractal is supposed to strongly affect the protonic conductivity nanocomposites.
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Ku, Bon-Cheol, Alexandre Blumstein, Jayant Kumar, Lynne A. Samuelson, and Dong Wook Kim. "Ordered Polymer Nanocomposites: Barrier Properties." In Dekker Encyclopedia of Nanoscience and Nanotechnology, Third Edition, 3467–77. Taylor & Francis, 2014. http://dx.doi.org/10.1081/e-enn3-120013848.

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Kumar, Jayant, Alexandre Blumstein, Bon-Cheol Ku, Dong Wook Kim, and Lynne Samuelson. "Barrier Properties of Ordered Polymer Nanocomposites." In Dekker Encyclopedia of Nanoscience and Nanotechnology, Second Edition - Six Volume Set (Print Version), 267–77. CRC Press, 2008. http://dx.doi.org/10.1201/noe0849396397.ch23.

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Ku, Bon-Cheol, Jayant Kumar, Alexandre Blumstein, Dong Wook Kim, and Lynne Samuelson. "Barrier Properties of Ordered Multilayer Polymer Nanocomposites." In Dekker Encyclopedia of Nanoscience and Nanotechnology, Second Edition - Six Volume Set (Print Version). CRC Press, 2004. http://dx.doi.org/10.1201/9781439834398.ch9.

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Rangel-Rojo, Raúl, Tiziana Cesca, Héctor Sánchez-Esquivel, Karen Yahaira Raygoza-Sánchez, Niccolò Michieli, Ionut Balasa, Boris Kalinic, and Giovanni Mattei. "Ordered arrays of metallic nanoprisms for photonic applications." In Nanocomposites for Photonic and Electronic Applications, 111–38. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-818396-0.00005-4.

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Conference papers on the topic "Ordered Nanocomposite"

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Wu, Linda Y. L., B. Leng, W. He, A. Bisht, and C. C. Wong. "Metal-polymer nanocomposite films with ordered vertically-aligned metal cylinders for optical application." In 2013 IEEE International Nanoelectronics Conference (INEC). IEEE, 2013. http://dx.doi.org/10.1109/inec.2013.6466056.

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Rangari, Vijaya, Tiffianni Watson, and Shaik Jeelani. "Fabrication, Thermal and Mechanical Characterization of Silicon Carbide-Expancel Nanocomposite." In ASME 2006 Multifunctional Nanocomposites International Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/mn2006-17049.

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A novel sonochemical method is developed to infuse silicon carbide nanoparticles (SiC) into expandable thermoplastic micro-spheres (Expancel) containing acrylonitrile and methylacrylonitrile polymer. Expancel micro-spheres consists a drop of liquid hydrocarbon encapsulated by a gas proof thermoplastic polymeric shell. These micro spheres expand ∼4 to 5 times of their original size (10μm) and drastically decrease it’s density from ∼1000kg/m3 to ∼30kg/m3, when exposed to the heat. To fabricate nanocomposite foam the Expancel microspheres were first dispersed in hexane along with known percentage of SiC nanoparticles and irradiated with high intensity ultrasonic horn for about 30min at room temperature. The excess n-hexane is removed using a high vacuum for 12h and heating at 60°C for 1h successively. The dry powder is transferred into a rectangular stainless steel mold and the mold is heated to ∼190°C at a heating rate of 10°C for 30 min using a MTP-14 programmable compression molding under a pressure of ∼ 3000lbs. The test coupons were cut precisely from the panels to carry out thermal, morphological and mechanical characterizations. The as-prepared nanophased foam samples were characterized by scanning electron microscopy (SEM), thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The SEM studies have shown that the SiC are well dispersed over the entire volume of the matrix with minimal, agglomeration. The foam cells structures are well ordered and uniform in size and spherical in shapes. The TGA and DSC analyses indicate that the nanophased foam materials are thermally more stable than the corresponding neat systems. Compression tests have been carried out for both nanophased and neat foams systems. Test results show a significant increase in compressive strength and modulus of the nanophased foams over the neat system. This enhancement in compressive properties has been observed repeatedly for multiple batches. Details of the synthesis procedure, thermal and mechanical characterization are presented in this paper.
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Castro, Nathan J., Christopher O’Brien, and Lijie Grace Zhang. "Development of Biomimetic and Bioactive 3D Nanocomposite Scaffolds for Osteochondral Regeneration." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66107.

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Osteochondral tissue is composed of ordered and random biological nanostructures and can, in principal, be classified as a nanocomposite material. Thus, the objective of this research is to develop a novel biomimetic biphasic nanocomposite scaffold via a series of 3D fabricating techniques for osteochondral tissue regeneration. For this purpose, a highly porous Poly(caprolactone) (PCL) bone layer with bone morphogenetic protein-2 (BMP-2)-encapsulated Poly(dioxanone) (PDO) nanospheres and nanocrystalline hydroxyapatite was photocrosslinked to a Poly(ethylene glycol)-diacrylate (PEG-DA) cartilage layer containing transforming growth factor-β1 (TGF-β1)-encapsulated PLGA nanospheres. Novel tissue-specific growth factor-encapsulated nanospheres were efficiently fabricated via a wet co-axial electrospraying technique. Integration and porosity of the distinct layers was achieved via co-porogen leaching and ultraviolet (UV) photocrosslinking of water soluble poly(ethylene glycol) (PEG) and <150 um sodium chloride salt particles providing greater control over pore size and increased surface area. Our in vitro results showed significantly improved human bone marrow derived mesenchymal stem cells (hMSCs) adhesion and differentiation in bone and cartilage layers, respectively. In addition, we are working on developing a novel table top stereolithography (SL) apparatus for the manufacture of custom designed 3D biomimetic scaffolds with incorporated growth factor encapsulated nanospheres for osteochondral defect repair. Our early-stage SL development has illustrated good corroboration between computer-aided design (CAD) and manufactured constructs with controlled geometry. The ultimate goal of the novel tabletop SL system is the manufacture of patient-specific implantable 3D nanocomposite scaffolds for osteochondral defect repair. The current SL system developed in our lab allows for efficient photocrosslinking of two novel nanocomposite polymeric materials for the manufacture of three-dimensional (3D) osteochondral constructs with good spatiotemporal control of growth factor release in addition to exhibiting similar mechanical properties to that of the native tissues being addressed.
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Sigamani, Nirmal Shankar, Zoubeida Ounaies, and Henry Sodano. "Synthesis and Characterization of PVDF-Based SWNT/GO Hybrid Films." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8021.

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Hybrid nanocomposites with single walled carbon nanotubes (SWNT) and graphene oxide (GO) as nanofillers and polyvinylidene fluoride (PVDF) as a polymer were synthesized as potential electronic active polymers (EAPs) with high breakdown strength. A co-solvent method was developed to achieve exfoliation and dispersion of GO in PVDF. The microstructure of the PVDF was found to be predominantly γ phase. Percent crystallinity of PVDF increased due to the addition of the hybrid nanofillers. And, at room temperature, the storage modulus is increased by 56.26% over the pure PVDF. The dielectric constant increased from ∼7 to ∼25 for the hybrid nanocomposites as compared to pure PVDF at 1KHz measurement frequency. Dielectric loss of the hybrid nanocomposite is found less than 0.6 for the frequency range from 20 Hz–1MHz. Electrical conductivity of the hybrid nanocomposite increase by nearly two orders of magnitude at 1KHz when compared to pure PVDF. The effect of the presence of these hybrid nanofillers on microstructure and properties of PVDF are discussed.
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Ismail, Rabah Mahmoud Ahmad, R. Rathinam, Marwa Al-Jamal, Sathish Kumar Ramachandran, Hashem Al-Mattarneh, Bhasker Pant, and Pandurang Y. Patil. "Mn-BIM Based Photo-Catalytic Degradation of Hazardous Industrial Organic Pollutants in Fresh Water." In International Conference on Recent Advancements in Biomedical Engineering. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-1c4w1k.

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A simple chemical co-precipitation approach was used to produce in situ nanocomposites based on Mn-BIM, and the results were promising. It is possible to increase the photocatalytic degradation efficiency. The morphology of the nanocomposites is investigated using X-ray diffraction data and the structural features of the nanocomposites are investigated using electron microscopy. Mn-BIM is a nanoparticle with an average size of 50 nm. In order to determine their photo-catalytic activity, researchers investigated nanocomposites produced from industrial waste dyes rhodamine-B. Following 90 minutes in direct sunshine, the photo-degradation of these dyes occurs, with a photo-degradation rate of more than 90 percent. To evaluate whether nanocomposite materials have the ability to photodegrade dyes, tests have been carried out. The rate-limiting stepwise de-ethylation process for the degradation of rhodamine-B dye has been proposed as the mechanism of degradation.
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Pashayi, Kamyar, Hafez Raeisi Fard, Fengyuan Lai, Joel Plawsky, and Theodorian Borca-Tasciuc. "Annealing Temperature Effect on the Structure of High Thermal Conductivity Silver/Epoxy Nanocomposites." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65578.

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The thermal conductivity κ of polymer nanoparticle composites is typically <10 Wm−1K−1, even when high κ nanofillers are employed, due to the thermal interface resistance between nanoparticles and the polymer matrix1 or the absence of high thermal conductivity pathways. We recently demonstrated high κ in bulk nanocomposites of silver nanoparticles dispersed in epoxy and cured at low temperature (150 °C). A nanocomposite with 30 vol. % 20nm particles exhibited κ ∼30 Wm−1K−1.2 The mechanism responsible for enhancing κ was found to be the self-construction, through in-situ sintering, of high aspect ratio metallic networks inside the nanocomposite.2 In order to control and optimize the network structure and subsequently increase κ even further, this work focuses on studying the effects of curing temperature and nanoparticle surface coating on the structure of the nanocomposite.
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Farahani, Rouhollah Dermanaki, Hamid Dalir, Martin Le´vesque, and Daniel Therriault. "Mechanical Properties of Three-Dimensional Microstructures Infiltrated by Carbon Nanotube/Epoxy Nanocomposite Under Shear Flow." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39086.

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Three-dimensional interconnected microfluidic channels fabricated by the direct-write method were infiltrated with SWCNT/epoxy nanocomposites under high shear flow to mechanically characterize the effect of single-walled carbon nanotubes (SWCNTs) spatial orientation in thermosetting-matrix nanocomposites. The micron-size fugitive ink filaments were deposited layer by layer in order to form a scaffold followed by its encapsulation by an epoxy resin. Three-dimensional interconnected microfluidic channels were then obtained by heat curing the encapsulated epoxy followed by fugitive ink removal by liquefying it at high temperature under vacuum. To debundle the Laser-ablated single-walled carbon nanotubes (La-SWNTs), nitric acid treatment following introduction of protoporphyrin IX as surfactant were done to prevent reclustering of the CNTs after separation. La-SWNTs were then mixed with ultraviolet-curable epoxy using a three-roll mill machine to achieve a well-dispersed nanocomposite. The nanocomposites were then infiltrated within the empty channels at high pressures to induce shear. High shear flow infiltration of nanocomposites will cause the CNTs to be aligned in the direction of the channels where an increase in shear leads to an increase in CNT alignments. Finally, in order to mechanically investigate the effectiveness of the infiltration technique and the orientation of SWCNTs, tensile and three-point bending tests were done.
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Oyen, Michelle L., and Ching-Chang Ko. "Variability of Nanoindentation Responses of Bone and Artificial Bone-Like Composites." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59530.

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Nanoindentation is a popular technique for measuring the intrinsic mechanical response of bone and has been used to measure a single-valued elastic modulus. However, bone is a composite material with 20–80 nm hydroxyapatite plates embedded in a collagen matrix, and modern instrumentation allows for measurements at these small length scales. The present study examines the indentation response of bone and artificial gelatin-apatite nanocomposite materials across three orders of magnitude of lengthscale, from nanometers to micrometers, to isolate the composite phase contributions to the overall response. The load-displacement responses were variable and deviated from the quadratic response of homogeneous materials at small depths. The distribution of apparent elastic modulus values narrowed substantially with increasing indentation load. Indentation of particulate nanocomposites was simulated using finite element analysis. Modeling results replicated the convergence in effective modulus seen in the experiments. It appears that the apatite particles are acting as the continuous (“matrix”) phase in bone and nanocomposites.
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Herren, Blake, Tingting Gu, Qinggong Tang, Mrinal Saha, and Yingtao Liu. "3D Printing and Stretching Effects on Alignment Microstructure in PDMS/CNT Nanocomposites." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10512.

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Abstract The alignment of high aspect ratio reinforcing nanoparticles within a polymer matrix can have significant effects on the mechanical, electrical, and thermal properties of the nanocomposite. Therefore, in order to tailor the properties of the composite, it is imperative to develop novel methods to control the alignment of these filler particles in various polymeric matrices. This paper reports a unique approach to alter the alignment of carbon nanotubes (CNT) within polydimethylsiloxane (PDMS) nanocomposites using 3D printing technology. A line of the reinforced PDMS resin is printed on a PDMS substrate using direct ink writing technology, which can produce alignment in the print direction depending on printing parameters, the loading of the reinforcing particle, and the rheology of the ink. Then, the substrate is stretched and placed in an oven to cure the printed nanocomposites line with increased alignment in the stretch direction. These two techniques have the advantage of simplicity over other techniques and can efficiently manufacture nanocomposites with the alignment of nanoparticles. Optical microscopy will be used to quantify the alignment within the printed line. Electrical and mechanical properties will be tested to determine the effects of the different alignments within the elastomer. The ability to control the alignment of elastomeric CNT composites is advantageous for the growing field of polymer-based electronics.
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Thaler, Dominic, Nahal Aliheidari, and Amir Ameli. "Electrical Properties of Additively Manufactured Acrylonitrile Butadiene Styrene/Carbon Nanotube Nanocomposite." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8002.

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Additive manufacturing is an emerging method to produce customized parts with functional materials without big investments. As one of the common additive manufacturing methods, fused deposition modeling (FDM) uses thermoplastic-based feedstock. It has been recently adapted to fabricate composite materials too. Acrylonitrile butadiene styrene (ABS) is the most widely used material as FDM feedstock. However, it is an electrically insulating polymer. Carbon Nanotubes (CNTs) on the other hand are highly conductive. They are attractive fillers because of their high aspect ratio, and excellent mechanical and physical properties. Therefore, a nanocomposite of these two materials can give an electrically conductive material that is potentially compatible with FDM printing. This work focuses on the investigation of the relationships between the FDM process parameters and the electrical conductivity of the printed ABS/CNT nanocomposites. Nanocomposite filaments with CNT contents up to 10wt% were produced using a twin-screw extruder followed by 3D printing using FDM method. The starting material was pellets from a masterbatch containing 15 wt% CNT. Compression-molded samples of ABS/CNT were also prepared as the bulk baselines. The effects of CNT content and nozzle size on the through-layer and in-layer electrical conductivity of the printed nanocomposites were analyzed. Overall, a higher percolation threshold was observed in the printed samples, compared to that of the compression-molded counterparts. This resulted in the conductivity of the printed samples that is at least one order of magnitude lower. Moreover, at CNT contents up to 5 wt%, the in-layer conductivity of the printed samples was almost two orders of magnitudes higher than that in the through-layer direction. In ABS/3 wt% CNT samples, the through-layer conductivity continuously decreased as the nozzle diameter was decreased from 0.8 mm to 0.35 mm. These variations in the electrical conductivity were explained in terms of the CNT alignment, caused by the extrusion process during the print, quality of interlayer bonding during deposition, and the voids created due to the discrete nature of the printing process.
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Reports on the topic "Ordered Nanocomposite"

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Lin, Zhiqun, Mufit Akinc, Xiaoli Tan, and Nicola Bowler. Design and Development of Novel Hierarchically Ordered Block Copolymer-Magnetoelectric Particle Nanocomposites. Fort Belvoir, VA: Defense Technical Information Center, June 2012. http://dx.doi.org/10.21236/ada582280.

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Liu, Shiqiang S. Propulsion and PWR Rapid Response Research and Development (R&R) Support: Delivery Order 0030: Study of Hot Deformation of Nanocomposite Rare Earth Magnets. Fort Belvoir, VA: Defense Technical Information Center, March 2006. http://dx.doi.org/10.21236/ada454269.

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