Water Sorption-Desorption-Resorption Effects on Mechanical Properties of Epoxy�Nanoclay Nanocomposites

Shettar, Manjunath and Kowshik, Suhas C S and Gowri Shankar, M C and Hiremath, Pavan and Sharma, S S (2022) Water Sorption-Desorption-Resorption Effects on Mechanical Properties of Epoxy�Nanoclay Nanocomposites. International Journal of Automotive and Mechanical Engineering, 19 (1). pp. 9478-9486. ISSN 2229-8649

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Abstract

The present work aims to study the effect of water sorption–desorption–resorption conditions on the mechanical properties of epoxy-nanoclay nanocomposites (ENNCs). To prepare ENNCs specimens, nanoclay and epoxy are mixed together by a stirrer and a sonicator. The nanoclay-epoxy and hardener mixture are moulded into specimens that meet the dimensions prescribed by the ASTM standards. The specimens fabricated are subjected to three conditions viz., water sorption, desorption and resorption for a total of 140 days. Water sorption–desorption– resorption effects on the mechanical properties of pure epoxy and ENNCs are studied by tensile and flexural tests. Results showed that the nanoclay presence improved the mechanical properties and lowered the percentage of water uptake. Tensile and flexural strengths of epoxy and ENNCs are reduced under sorption conditions and recovered to more than 90% of their original strengths under desorption conditions. The lowest tensile and flexural strengths were displayed by specimens subjected to resorption in comparison to specimens subjected to the other two conditions. The flexural and tensile strengths of epoxy are more severely affected compared to ENNCs under water sorption–desorption–resorption conditions. Scanning electron microscopy images are employed to learn the causes of specimen failure under a tensile load.

Item Type: Article
Uncontrolled Keywords: Nanoclay; Water uptake; Tensile strength; Flexural strength
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 23 Jun 2022 09:49
Last Modified: 23 Jun 2022 09:49
URI: http://eprints.manipal.edu/id/eprint/158869

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