Effect of heat treated HNT on physico-mechanical properties of epoxy nanocomposites

Ravichandran, G; Rathnakar, G.; Santhosh, N.

doi:10.1016/j.coco.2019.02.005

Cited by 24 publications

(19 citation statements)

References 20 publications

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“…The micrographs are taken with gold sputtering on the post flexural fracture surface of the specimens. All micrographs in Figures 5 and 6 show less amount of debris indicating a brittle fracture of all samples, which is evident from previous studies 31,32,38 . The crack initiates from the tensile side of the specimen reaching the compression side where major cenosphere crushing is witnessed.…”

Section: Resultssupporting

confidence: 73%

“…In order to keep the parameters affecting the properties minimum and for the ease of commercialization to manufacturing industries, no modifications in the HNTs nanofiller are considered. As received HNTs are first dried in an oven at 50°C for 10 min in order to enhance the mechanical properties in epoxy composites 32 . The nanofiller is allowed to cool for 1 h, then 1 vol% of HNTs were added to a small beaker with 15 ml acetone.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Study of mechanical and dynamic mechanical behavior of halloysite nanotube‐reinforced multiscale syntactic foam

Bakshi

Kattimani

2020

J of Applied Polymer Sci

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The present study deals with the development of novel cenosphere‐epoxy multiscale syntactic foam (MSF) reinforced with halloysite nanotubes (HNTs). Cenospheres with different volume fractions (0, 20, 30, 40, 50 vol%) and HNTs (1 vol%) used in the fabrication of syntactic foams. The addition of HNTs increases the tensile modulus (42%) and flexural modulus (66%) compared with plain syntactic foam (PSF). Furthermore, FTIR studies reveal the strong hydrogen bonding interaction between HNTs and epoxy. Field emission scanning electron microscopy (FESEM) confirms the unique crack deflection phenomenon by HNT, which indicates the structure–property correlation. In addition, the storage and loss modulus of MSFs is 36 and 113%, respectively (at 30°C) higher than the neat epoxy. Improvement in the tensile and flexural properties along with excellent thermal stability at elevated temperature makes MSF a promising material for structural, weight‐sensitive, and high‐temperature applications.

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Section: Resultssupporting

confidence: 73%

Section: Experimental Methodsmentioning

confidence: 99%

Study of mechanical and dynamic mechanical behavior of halloysite nanotube‐reinforced multiscale syntactic foam

Bakshi

Kattimani

2020

J of Applied Polymer Sci

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“…Several biopolymers and natural fibers are being used to develop biopolymer composites. [1][2][3] The recyclability and the eco compatibility studies of these composites have gained importance. [4] Thus, it is important to understand the behavior of the biopolymer composites under different environmental conditions, and in this regard, it is more important to understand the fundamentals of biopolymers and natural fibers prior to the mechanism, mode and characterization of the biopolymer composites under different environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Several biopolymers and natural fibers are being used to develop biopolymer composites. [ 1–3 ] The recyclability and the eco compatibility studies of these composites have gained importance. [ 4 ]…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on the biopolymer composites: Mechanisms, modes and characterization

Santhosh

Praveena²,

Naik

et al. 2022

Polymer Composites

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The biopolymer composites have gained greater significance due to their eco compatibility. However, the performance, longevity, and the durability of the biopolymer composites are greatly influenced by the aging. The functioning of the bio composites in the varying environmental conditions are strongly influenced by their inherent characteristics and physico-chemical changes that they undergo due to aging. These biopolymer composites are subject to the chemical degradations such as oxidation, and physical modifications which affects the physical structure of the biopolymers in the composites. The material kinetics, especially related to the plasticizers and the thermomechanical attributes related to the fiber dispersion in the bio composites is greatly influenced by the aging of the composites under different environmental conditions, viz., saline, acidic, and alkaline environments and under different physical degradations, viz., wear, delamination, and surface ruptures. The modes and mechanisms of aging of the biopolymer composites under different operating environments, and the influence of aging on the characteristics of the biopolymer composites are critically reviewed and summarized in this article.

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“…From the literature reviews, it is herewith understood that the most effective way to increase the antiwear performance of any class of polymer matrix composites is by the addition of a small quantity of nanoparticles in the matrix phase. The inclusions of these reinforcements may lead to an enhancement in the wear performance of the nanocomposites due to development of the larger contact surface area of the nanoparticles and also more interactions with the polymers due to their high aspect ratio [8][9][10][11][12]., Halloysite nanotube (HNT) is a potential filler which has tubular morphology and belonging to kaolin group with their features similar to single wall carbon nanotube (SWCNT) and having several advantages namely cost effectiveness, easy processing, high aspect ratio, better compatibility with polymers, better resistance against organic solvents and ease of disposal or reusability has been reported, it oftenly improves the mechanical performance [13][14][15][16]. Further, HNT reinforcements comprises of the two hard ceramic elements viz.…”

Section: Introductionmentioning

confidence: 99%

Antiwear Performance Evaluation o f Halloysite Nanotube ( HNT ) Filled Polymer Nanocomposites

G*¹,

Rathnakar²,

Santhosh³

et al. 2019

IJEAT

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Polymer nanocomposites containing various types of reinforcements and fillers are oftenly used in applications such as sliding elements in the machine and automotive parts, gear assemblies etc., in which tribological performance parameters viz. friction and wear are the major issues. In this work, the specific wear rate of HNT filler loading (0-4wt %) in Glass-Epoxy nanocomposites fabricated by vacuum bagging technique are evaluated experimentally. For this purpose, the specimens are prepared and tests are conducted as per the ASTM G-99 standard for a number of trials with the assistance of a pin-on-disc machine by varying load and speed values, keeping time and track diameter constant. The results obtained from experiments reveals that reduction in specific wear rate and the amount of material loss is quite significant for HNT loaded specimens when compared with neat sample even at higher operating conditions. This indicates that HNT comprises of hard ceramic elements viz. SiO2 and Al2O3 which eventually enhances the antiwear behaviour of prepared nanocomposites. Finally, a study on wear mechanisms and morphologies are carried out by analyzing the worn surfaces through SEM micrographs.

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Effect of heat treated HNT on physico-mechanical properties of epoxy nanocomposites

Cited by 24 publications

References 20 publications

Study of mechanical and dynamic mechanical behavior of halloysite nanotube‐reinforced multiscale syntactic foam

Study of mechanical and dynamic mechanical behavior of halloysite nanotube‐reinforced multiscale syntactic foam

Effect of aging on the biopolymer composites: Mechanisms, modes and characterization

Antiwear Performance Evaluation o f Halloysite Nanotube ( HNT ) Filled Polymer Nanocomposites

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