Exploring Possible Synergy Between Carbon-Based Nanofiller Reinforcements with Regards to Fracture Toughness Enhancement in Dual Filler Epoxy Nanocomposites

2022 ◽  
Author(s):  
Gary D. Seidel ◽  
Nishant Shirodkar
Keyword(s):  
Fracture Toughness ◽  
Epoxy Nanocomposites ◽  
Toughness Enhancement ◽  
Carbon Based

Fracture Toughness Enhancement of UV-Cured Epoxy Coatings Containing Al2 O3 Nanoparticles

2013 ◽  
Vol 298 (11) ◽  
pp. 1184-1189 ◽  
Author(s):  
Marco Sangermano ◽  
Mohamed Naguib ◽  
Massimo Messori
Keyword(s):  
Fracture Toughness ◽  
Epoxy Coatings ◽  
Toughness Enhancement

scholarly journals Fracture toughness of one- and two-dimensional nanoreinforced cement via scratch testing

2021 ◽  
Vol 379 (2203) ◽  
pp. 20200288 ◽  
Author(s):  
Ange-Therese Akono
Keyword(s):  
Carbon Nanotubes ◽  
Fracture Toughness ◽  
Cement Industry ◽  
Vertical Force ◽  
Two Dimensional ◽  
Scratch Testing ◽  
Helical Carbon Nanotubes ◽  
Reinforced Cement ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

Cement is the most widely consumed material globally, with the cement industry accounting for 8% of human-caused greenhouse gas emissions. Aiming for cement composites with a reduced carbon footprint, this study investigates the potential of nanomaterials to improve mechanical characteristics. An important question is to increase the fraction of carbon-based nanomaterials within cement matrices while controlling the microstructure and enhancing the mechanical performance. Specifically, this study investigates the fracture response of Portland cement reinforced with one- and two-dimensional carbon-based nanomaterials, such as carbon nanofibres, multiwalled carbon nanotubes, helical carbon nanotubes and graphene oxide nanoplatelets. Novel processing routes are shown to incorporate 0.1–0.5 wt% of nanomaterials into cement using a quadratic distribution of ultrasonic energy. Scratch testing is used to probe the fracture response by pushing a sphero-conical probe against the surface of the material under a linearly increasing vertical force. Fracture toughness is then computed using a nonlinear fracture mechanics model. Nanomaterials are shown to bridge nanoscale air voids, leading to pore refinement, and a decrease in the porosity and the water absorption. An improvement in fracture toughness is observed in cement nanocomposites, with a positive correlation between the fracture toughness and the mass fraction of nanofiller for graphene-reinforced cement. Moreover, for graphene-reinforced cement, the fracture toughness values are in the range of 0.701 to 0.717 MPa m . Thus, this study illustrates the potential of nanomaterials to toughen cement while improving the microstructure and water resistance properties. This article is part of a discussion meeting issue ‘A cracking approach to inventing new tough materials: fracture stranger than friction’.

Fracture toughness enhancement of brittle nanostructured materials by spatial heterogeneity: A micromechanical proof for CrN/Cr and TiN/SiOx multilayers

2016 ◽  
Vol 104 ◽  
pp. 227-234 ◽  
Author(s):  
Rostislav Daniel ◽  
Michael Meindlhumer ◽  
Jakub Zalesak ◽  
Bernhard Sartory ◽  
Angelika Zeilinger ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Spatial Heterogeneity ◽  
Nanostructured Materials ◽  
Toughness Enhancement

Preparation and properties of carbon‐based epoxy nanocomposites: Dynamic mechanical, dielectric, and thermal properties

2020 ◽  
Vol 41 (12) ◽  
pp. 4974-4982
Author(s):  
Rui Wang ◽  
Congzhen Xie ◽  
Bin Gou ◽  
Huasong Xu ◽  
Shoukang Luo ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Epoxy Nanocomposites ◽  
Dynamic Mechanical ◽  
Dielectric And Thermal Properties ◽  
Carbon Based

DEA and DSC study of cubic silsesquioxane epoxy resin nanocomposites

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Newton Luiz Dias Filho ◽  
Hermes Adolfo de Aquino
Keyword(s):  
Mechanical Properties ◽  
Activation Energy ◽  
Fracture Toughness ◽  
Differential Scanning Calorimetry ◽  
Epoxy Resin ◽  
Loss Factor ◽  
Tensile Modulus ◽  
Dielectric Analysis ◽  
Epoxy Nanocomposites ◽  
Scanning Calorimetry

AbstractNon-isothermal dielectric analysis (DEA) and differential scanning calorimetry (DSC) techniques were used to study the epoxy nanocomposites prepared by reacting 1,3,5,7,9,11,13,15-octa[dimethylsiloxypropylglycidylether] pentaciclo [9.5.1.13,9.15,15 .17,13] octasilsesquioxane (ODPG) with methylenedianiline (MDA). Loss factor (ε”) and activation energy were calculated by DEA. The relationships between the loss factor, the activation energy, the structure of the network, and the mechanical properties were investigated. Activation energies determined by DEA and DSC, heat of polymerization, fracture toughness and tensile modulus show the same profile for mechanical properties with respect to ODPG content.

Depth sensing indentation of nanoscale graphene platelets in nanocomposite thin films

2011 ◽  
Vol 1312 ◽  
Author(s):  
Ardavan Zandiatashbar ◽  
Catalin R. Picu ◽  
Nikhil Koratkar
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Characteristic Length ◽  
Matrix Interface ◽  
Depth Sensing ◽  
Epoxy Nanocomposites ◽  
Dramatic Decrease ◽  
Graphene Platelet ◽  
Nanocomposite Thin Films

ABSTRACTSignificant improvement of mechanical properties was observed recently in graphene platelet-epoxy nanocomposites relative to unfilled epoxy, such as an increase of the fracture toughness by 50% and dramatic decrease of fatigue crack growth rate. In this work, thin films of 0.1 wt.% of graphene platelet (GPL) – epoxy nanocomposites were fabricated and the nanoscale mechanical properties of the nanocomposite were investigated by nanoindentation. This provides information about the presence of characteristic length scales induced by the microstructure and the strength of the filler-matrix interface.

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