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![11 Carbon fiber used in precast concrete [14Acs]](profile/Moumita-Naskar-2/publication/317206190/figure/fig5/AS:1116726292942849@1643259704742/Carbon-fiber-used-in-precast-concrete-14Acs.jpg)
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![Fig. 3.8 Schematic representation of spray-up process [14Pla]](profile/Moumita-Naskar-2/publication/317206190/figure/fig4/AS:1116726292942848@1643259704732/Schematic-representation-of-spray-up-process-14Pla_Q320.jpg)
![Fig. 3.11 Carbon fiber used in precast concrete [14Acs]](profile/Moumita-Naskar-2/publication/317206190/figure/fig5/AS:1116726292942849@1643259704742/Carbon-fiber-used-in-precast-concrete-14Acs_Q320.jpg)
Polymer nanocomposites are revolutionizing the world of structure and construction nowadays. Since long time unreinforced polymer composites are being used in the construction industry in non-load-bearing applications such as trimmings, kitchenware, cladding, etc. In the last decade, polymer nanocomposites continue to rise into the construction ind...
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Atomic force microscopy is a powerful topography imaging method used widely in nanoscale metrology and manipulation. A conventional Atomic Force Microscope (AFM) utilizes an optical lever system typically composed of a laser source, lenses and a four quadrant photodetector to amplify and measure the deflection of the cantilever probe. This optical...
Citations
... New-generation Carbon Fiber-Reinforced Polymer (CFRP) composites are the engineer's desired material for PNC applications because of their high thermo-mechanical properties, superior corrosion resistance, robustness, translucency, lightweight, and processing ease. According to Naskar (2017), in CFRP, the reinforcing fiber supports strengthening and stiffening the structure, whereas the matrix links the fibers together and distributes the stress from one fiber to another, thereby providing superior qualities. ...
... Polymer nanocomposites are high performance materials with application in a wide range of industries such as automobile [10], aerospace [11], coatings [12], construction engineering [13] and packaging [14][15][16] at low nanoparticles content (i.e., less than 5% by weight). Layered clay minerals such as cationic montmorillonite (MMT) and anionic hydrotalcite or layered double hydroxide (LDH) are commonly used in nanocomposites due to its availability and properties [17,18]. ...
Polymer nanocomposite performance depends not only on the compatibility between nanoparticles and polymer matrix, but also the sequence in which the nanoparticle is incorporated into the polymer and the compounding device applied. In this study, we report the morphology, oxygen permeability, thermal and mechanical properties of the polypropylene nanocomposites change due to the use of a thermokinetic mixer when specific preparation steps are followed based on the dispersing agents used. Two organically modified clays and dispersing agents were applied: montmorillonite and hydrotalcite; hydrogenated hydrocarbon resin and poly (propylene-g-maleic anhydride) as compatibilizer with different maleic anhydride content. For the nanocomposites containing montmorillonite, poly (propylene-g-maleic anhydride), with low maleic anhydride content and the hydrocarbon resin prepared using the thermokinetic mixer, a more efficient clay dispersion was achieved. As a result, an increase in mechanical stiffness (57% in the Young modulus), higher thermal stability and a decrease in oxygen permeability (58%) were obtained. However, samples prepared with hydrotalcite achieved a better distribution and dispersion by preparing directly on a twin-screw extruder. Wherein, higher mechanical stiffness (36% in the Young modulus) with reduction in the oxygen permeability (52%) was reached when poly (propylene-g-maleic anhydride) with low maleic anhydride content and the hydrocarbon resin were present. These results point to that by using the dispersing agents in combined with a proper mixing system is possible to improve polyolefin nanocomposite properties, increasing the range of application in the packaging industry.
... In particular, this is due to the presence of whole valuable properties set in plastics: low density with significant strength, resistance to various aggressive influences, low thermal conductivity, good decorative properties [1,3]. An essential advantage of plastics is the ease of their processing -the possibility of giving them a variety of forms by casting, pressing, extrusion (extrusion), and also high factory availability of products [6,7]. ...
The work is devoted to the study of the plastics features in modern construction use. The plastics classification in modern construction is generalized. This classification includes: the field of building products application, the features of the materials properties and products, a backup group that includes those products that are not included in the previous groups. The classification considered is the basis for choosing the basic materials properties that affect the quality and durability of products. To improve the plastics types in the construction, the Venn diagram is used. The main materials types for manufacturing a product of the "window profile" type are analyzed; the result of the studies is a comparative diagram.
Materials have an essential role since the beginning of civilization and play a major role in all new technologies and research. Fibre Reinforced Polymer (FRP) composite is an extensively utilized material in most of the engineering applications due to its low weight, good shock absorbent, high strength, chemical stability, low cost, very good corrosion and abrasion resistance. It is acknowledged that adding fillers to polymer matrixes can improve material characteristics, such as tribological and mechanical capabilities of polymer composites. Whereas, the size of the nano particles is same as that of a polymer, the durability of FRP composites can be considerably improved by the inclusion of nanofillers, although various parameters, including temperature, pH, UV radiations, sea water, and chemicals, can have an impact. FRP nanocomposites are used in a variety of automotive, industrial, aerospace, marine, oil and gas sectors due to its broad range of features. An effort has been made in this review to understand the suitability and applications of FRP nanocomposites in various structural engineering filed.
Cellulose nanofibers (CNFs) are linear polymer that exhibits high stiffness and strength due to extensive intermolecular and intramolecular hydrogen bonds among the molecules. These nano materials are taking place in replacing synthetic fiber as reinforcement in nanocomposites. This present work investigates the potential used of CNFs in improving microstructural and mechanical properties of thermoplastic polyurethane (TPU) nanocomposite. Cellulose nanofibers used in this work was extracted from jute fiber via chemomechanical method. Neat TPU and TPU/jute CNFs nanocomposite were successfully prepared by using melt blending method. In addition, the morphology and mechanical properties of prepared net TPU and TPU/jute CNFs nanocomposite were evaluated through field emission scanning electron microscope (FESEM), shore durometer and vickers micro hardness. FESEM micrograph reveals that the jute CNFs exhibited a uniformly dispersed in TPU matrix. The incorporation of jute CNFs result in increases of 20.13% hardness strength of prepared nanocomposites.
