Title:
Strengthening Interface Interactions in Carbon Based Nanomaterials/Cementitious Nanocomposites via Functionalization
Author(s):
Maria Konsta
Publication:
Web Session
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Issue:
Appears on pages(s):
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DOI:
Date:
10/23/2022
Abstract:
In this presentation we demonstrate an effective control of the yet unexplored nanoscale interfacial interactions between the nanomaterials and cement hydration products, via nanomaterial functionalization, optimizing the uniformity and homogeneity of nanoreinforced concrete. Monodispersed nanomaterial-suspensions were produced and their perfect dispersibility and long-term stability was evaluated by Spectroscopic methods, UV-Vis, Dynamic Light Scattering and Electrochemical Impedance. The dispersed nano-material’s functionalization was assessed by identifying new chemical bonding on their surface through FTIR and Raman Spectroscopy. NanoIR mapping and testing findings on nanomaterial/C-S-H interface shown that the local nanostructure was radically modified due to the effective functionalization of the nanomaterial’s surface. Nano-mechanical characterization was followed to specify the types of monodispersed/functionalized nanomaterials that can be used to optimize interface’s interactions. It was shown that functionalization significantly promoted the strengthening and toughening mechanism of the Interfacial Transition Zone (ITZ) between the nanomodified cementitious hydrates and aggregates.