Polymer nanocomposite – fiber model interphases: Influence of processing and interface chemistry on mechanical performance

Rider, Andrew N.; An, Qi; Brack, Narelle; Thostenson, Erik T.

doi:10.1016/j.cej.2015.01.093

Cited by 56 publications

(34 citation statements)

References 54 publications

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“…In [31], Mehdikhani et al [33], the micro-DIC was applied to capture microscopic stress concentrations between the fibers. A reasonable agreement was found between the DIC-measured and FE-predicted strain fields.…”

Section: Modelling Results and Experimentally Observed Phenomenamentioning

confidence: 99%

Stress magnification due to carbon nanotube agglomeration in composites

Romanov

Lomov

Verpoest

et al. 2015

Composite Structures

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Section: Modelling Results and Experimentally Observed Phenomenamentioning

confidence: 99%

Stress magnification due to carbon nanotube agglomeration in composites

Romanov

Lomov

Verpoest

et al. 2015

Composite Structures

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“…14 The lower temperature range (350 -490°C) reported for CVD using glass (or an equivalent surface) 12 as 4 substrates is still high enough for the tensile properties of glass fibers to start degrading and may not yield defect-free CNT coated fibers. 15,16 Harsh deposition conditions and the degree of complexity required during the processing have motivated numerous researchers to explore viable alternative methods to deposit CNTs on structural components. 6,17 Grafting CNTs onto glass fibers can be achieved by different techniques such as dip coating, [18][19][20] spray coating, 21,22 and electrophoretic deposition (EPD) of CNTs.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Interfacial Properties by Controlling Carbon Nanotube Coating Thickness on Glass Fibers Using Electrophoretic Deposition

Tamrakar¹,

An²,

Thostenson³

et al. 2016

ACS Appl. Mater. Interfaces

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101

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The electrophoretic deposition (EPD) method was used to deposit polyethylenimine (PEI) functionalized multiwall carbon nanotube (CNT) films onto the surface of individual S-2 glass fibers. By varying the processing parameters of EPD following Hamaker's equation, the thickness of the CNT film was controlled over a wide range from 200 nm to 2 μm. The films exhibited low electrical resistance, providing evidence of coating uniformity and consolidation. The effect of the CNT coating on fiber matrix interfacial properties was investigated through microdroplet experiments. Changes in interfacial properties due to application of CNT coatings onto the fiber surface with and without a CNT-modified matrix were studied. A glass fiber with a 2 μm thick CNT coating and the unmodified epoxy matrix showed the highest increase (58%) in interfacial shear strength (IFSS) compared to the baseline. The increase in the IFSS was proportional to CNT film thickness. Failure analysis of the microdroplet specimens indicated higher IFSS was related to fracture morphologies with higher levels of surface roughness. EPD enables the thickness of the CNT coating to be adjusted, facilitating control of fiber/matrix interfacial resistivity. The electrical sensitivity provides the opportunity to fabricate a new class of sizing with tailored interfacial properties and the ability to detect damage initiation.

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“…The results showed that the primary failure mode of the untreated CF-reinforced composite was interface failure; while the primary failure mode of the CNTs coated CF-reinforced composite was matrix fracture. Previous studies on the adhesion strength of carbon fibers to epoxy resin suggest that the interfacial shear strength increases by shifting the fracture surface away from the carbon fiber surface [31], the improvement in the interfacial adhesion could be attributed to the new interface layer formed by depositing CNTs on the fiber surface.…”

Section: Composite Fracture Mechanism Analysismentioning

confidence: 96%