Nanocomposites for structural applications (original) (raw)
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Nanotechnology and the Environment [Working Title]
Nanocomposites are the heterogeneous/hybrid materials that are produced by the mixtures of polymers with inorganic solids (clays to oxides) at the nanometric scale. Their structures are found to be more complicated than that of microcomposites. They are highly influenced by the structure, composition, interfacial interactions, and components of individual property. Most popularly, nanocomposites are prepared by the process within in situ growth and polymerization of biopolymer and inorganic matrix. With the rapid estimated demand of these striking potentially advanced materials, make them very much useful in various industries ranging from small scale to large to very large manufacturing units. With a great deal to mankind with environmental friendly, these offer advanced technologies in addition to the enhanced business opportunities to several industrial sectors like automobile, construction, electronics and electrical, food packaging, and technology transfer.
Nanocomposites: Technologically Advanced Material for Wide Engineering Applications
Current Nanomaterials, 2017
Background: Since the available metals are not able to meet the desired structural, mechanical and electrochemical properties therefore composites and nanocomposites are being used now a days. Composites are an amalgamation of materials that are mixed together to develop new compound with special and superior properties as compared to the base material. Nanocomposite is a new approach in which out of two phase, any one phase should consist of single unit sized particle whose dimension lies in between 1 and 1000 nanometres (nm) but usually it lies between 1-100 nm Objective: The present paper provides an overview on the different types of nanocomposites, their manufacturing, mechanical behaviour & industrial applications. Method: Gupta et al. synthesized iron (Fe)-alumina (Al 2 O 3) metal matrix nanocomposites synthesized via powder metallurgy technique. Composition selected for the study was in the range of 5-30wt% of Al 2 O 3 in Fe matrix. Specimens were synthesized by ball milling, compaction and sintering in argon atmosphere in temperature range of 900-1100°C for 1 to 3 hour respectively. Results: It was found that due to reactive sintering between iron and alumina particles an iron aluminate (FeAl 2 O 4) phase forms. Formation of nano iron aluminate phases and related properties also depend on processing parameters. It was also found that the mechanical and electrochemical properties varies with the sintering parameters which in turn depend upon the iron aluminate phase formation. Conclusion: Metal Matrix Nanocomposites are excellent for manufacturing materials having high strength in the case of shear & compression processes and have ability to work at elevated temperature.
Nanocomposite and Its Morphological Characterization -Review
IOP Conference Series: Materials Science and Engineering, 2019
In the wider field of nanotechnology, nanocomposites have attracted a great deal of attention and, due to the enhanced mechanical, electrical and thermal properties of the weld with modulus, strength and dimensional stability of the nanocomposite, they find increased use for various applications in several industries. Metallic and ceramic nanocomposites were used at an earlier stage of development to solve the dangerous issue of optimizing nanomaterial dispersal in matrices. Nanocomposites are currently finding uses in many fields. However, there are also some disadvantages to these characteristics such as optical issues dispersion difficulties, the color black display when different carbon containing nanocomposite are used viscosity increase and sediments. This finding review more about scope of nanocomposite and its morphological structural characterization that make it more suitable in its application.
Synthesis and Properties of Nanocomposites
Advanced Engineering Materials, 2004
Nanocomposites may exhibit new properties of technical interest. Technical applications require many particles, leading to interaction of the particles thwarting the performance of these materials. To exploit specific nano-properties, the use of composites preventing the particles from interaction is necessary. This leads to the application of nanocomposites. The most homogeneous composites consist of a core coated with an outer layer of a second ceramic or a polymer. For industrial or at least semi-industrial production of nanocomposites, a process leading to non-agglomerated powders in a sufficient quantity is needed. Additionally, coating of the particles with either a second ceramic phase or an organic one is necessary. The Karlsruhe Microwave Plasma Process fulfils these conditions.
Applications of nanocomposites
2001
This paper considers examples of how a material nanostructure can influence its properties. The examples covered are grain refiners and secondary phases in commercial wrought Al alloys, devitrified amorphous magnetic Fe alloys, magnetic multilayers for storage media and read/write devices, and 1-D crystals in single walled C nanotubes.
Nano composites are an emerging class of mineral-filed plastics that contain relatively small amounts (<10%) of nanometer-sized clay articles. These mineral significantly enhance the mechanical and thermal properties of the base resin, as well as improve barrier performance and flame retardancy. All of these performance benefits are available without increasing the density or reducing light transmission properties of the base polymer. First developed by Toyota over 10 years ago. Nano composites are just becoming viable commercial product and nylon 6 was the first polymer to be used in the development of Nano composites. Although some reports glorify the discovery of nano composites as revolutionary break thought in science and technology, it should be noted that the basic synthetic concept has been established for many decades.
Physical Properties of Nanocomposites in Relation to Their Advantages
Journal of IMAB - Annual Proceeding (Scientific Papers), 2016
Extensive studies have been undertaken to improve dental composites with advances in filler compositions and resin chemistry. The unique nature of the filler particles of nanocomposites provides mechanical strength and wear resistance similar to hybrid composites, and superior polish and gloss retention similar to micro fill composites. The polymerization shrinkage in composites depends on the chemistry of the organic matrix. The flexural strength depends on the filler content and the filler chemistry. The nanometric particles and nanoclusters in the nanocomposites improve mechanical properties such as compressive strength, flexural strengths, and wear resistance of several nanocomposites were as good as those of universal hybrid composites. They provide high esthetics, hence they can provide optimal optical characteristics since the size of the nanometric particle is below the wavelength of light. This is relevant because the size is not measurable by the refractive index that can result in formulations having a broad spectrum of shade and opacity. Nanocomposite denture teeth comprises of polymethylmethacrylate, and uniformly dispersed nano-sized filler particles. Their advantages are:-highly polishable, stain and impact resistant material;-lively surface structure;-superior surface hardness and wear resistance.