Seminar Details

Seminar Title
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Environmental durability analysis of nanophased FRP composite: Emphasis on nanofiller functionalization and alignment
Seminar Type
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Progress Seminar
Department
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Metallurgical and Materials Engineering
Speaker Type
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Student
Speaker Name
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ABHINAV OMPRAKASH FULMALI ( RollNo : 518MM1008)
Date  &  Time
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18 May 2021  10:00 AM
Venue
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Online using MS Teams (Team Code: 0md7f93)
Contact
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Prof. Rajesh Kumar Prusty
Abstract
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Fiber reinforced polymer (FRP) composites are considered to be potential alternatives to the many conventional materials in structural applications due to their superior properties such as high specific strength, high resistance to corrosion, lightweight, and ease of tailorability. In this report, hydrothermal cycling in distilled water at a temperature of 15°C and 50°C on the flexural properties of neat and modified glass fiber reinforced epoxy (GE) composite with carbon nanotube (CNT) was studied. These cycling parameters were selected to create a severe environmental conditioning effect for GE and CNT-GE composite to evaluate its applicability for the marine environment. First of all, optimization of CNT content (0.1, 0.3, and 0.5 wt. %) was carried out by studying its flexural properties. Later, 0, 20, 40, and 60 hydrothermal cycles (HC) were conducted on GE and CNT-GE composite with optimum CNT content of 0.1 wt. % (0.1CNT-GE). After completion of the HC, flexural testing, Dynamic mechanical analysis (DMA), Energy-Dispersive X-ray Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR) and Fractography study was carried out to identify mechanical, thermo-mechanical, chemical and physical changes in the composite. The addition of 0.1 wt. % of CNTs resulted in a 6.68% and 6.47% increment in flexural strength and modulus of 0.1CNT-GE compared to neat GE composite due to enhanced available surface area at the CNT/epoxy interface which facilitated improved stress transfer between CNT and epoxy. With the increase in HC, well-dispersed CNTs generated microcavities due to differences in the coefficient of thermal expansion of CNT and epoxy, causing increased water absorption. After 60 HC, flexural strength and modulus of CNT-GE composite decreased by 10.47% and 2.55% compared to GE composite.

Link to the MS Team meeting: https://teams.microsoft.com/l/meetup-join/19%3a88ec291f32694b93bc8def0c068a5400%40thread.tacv2/1620735481745?context=%7b%22Tid%22%3a%22bad12864-913e-4b99-87d6-b8d2ad459e27%22%2c%22Oid%22%3a%221405e08f-48e6-42fb-b9e1-7bf443e14231%22%7d