scholarly journals Impact of the spatial distribution of high content of carbon nanotubes on the electrical conductivity of glass fiber fabrics/epoxy composites fabricated by RTM technique

2017 ◽  
Vol 147 ◽  
pp. 107-115 ◽  
Author(s):  
Delong He ◽  
Diana Salem ◽  
Jacques Cinquin ◽  
Gérard-Pascal Piau ◽  
Jinbo Bai
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Spatial Distribution ◽  
Glass Fiber ◽  
Epoxy Composites

Effect of the addition of aliphatic diamine-functionalized carbon nanotubes on the interfacial adhesion of glass fiber/epoxy composites

2021 ◽  
pp. 004051752110519
Author(s):  
Yecheng Fan ◽  
Shen Ziyue ◽  
Shaohua Zeng ◽  
Pengpeng Chen ◽  
Ying Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Glass Fiber ◽  
Interfacial Adhesion ◽  
Control Sample ◽  
Epoxy Composites ◽  
Aliphatic Diamine ◽  
Uniform Dispersion ◽  
Fiber Matrix ◽  
Interlaminar Shear ◽  
Chain Lengths

To improve the interfacial adhesion of glass fiber (GF)/epoxy composites, the GF surface was treated by dispersing aliphatic diamine-functionalized multi-walled carbon nanotubes (MWCNTs). Carboxyl MWCNTs were first modified by aliphatic diamine with different alkyl chain lengths and then deposited on the surface of GF. The effect of aliphatic diamine chain lengths on the MWCNTs’ dispersion and interfacial properties of resultant composites was investigated in detail. The results showed that uniform dispersion of MWCNTs and strong fiber/matrix interfacial adhesion could be achieved, based on the grafting of 1,8-octanediamine onto MWCNTs. Compared with the control sample, the interlaminar shear, flexural, and tensile strengths of the treated composites increased by 41%, 29%, and 30%, respectively; the interlaminar fracture toughness and storage modulus in the glass region were significantly enhanced; and the glass transition temperature increased by more than 8°C. This work demonstrates that the carbon nanotubes functionalized by appropriate chain lengths of amine modifier can improve the fiber/matrix interfacial interactions and thus enhance the strength, toughness, and stiffness of fiber-reinforced composites.

scholarly journals Assessing the Critical Multifunctionality Threshold for Optimal Electrical, Thermal, and Nanomechanical Properties of Carbon Nanotubes/Epoxy Nanocomposites for Aerospace Applications

Aerospace ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 7 ◽  
Author(s):  
Aikaterini-Flora Trompeta ◽  
Elias Koumoulos ◽  
Sotirios Stavropoulos ◽  
Theodoros Velmachos ◽  
Georgios Psarras ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
Critical Concentration ◽  
Epoxy Composites ◽  
Micro Computed Tomography ◽  
Epoxy Nanocomposites ◽  
Aerospace Structures ◽  
Nanomechanical Properties

Epoxy composites are widely used in primary aerospace structures, where high impact damage properties are necessary. However, challenges appear when multiple functionalities, including electrical and thermal conductivity, are needed in parallel with increased mechanical properties. The current study aims at the assessment of a critical concentration of multiwalled carbon nanotubes (MWCNTs), incorporated in epoxy resin, which will indicate a threshold for optimal electrical, thermal and mechanical properties. For the evaluation of this optimal concentration, electrical conductivity, thermal stability and nanomechanical properties (Young modulus and nanohardness) have been assessed, for epoxy nanocomposites with 0 to 15 parts per hundred resin per weight (phr) MWCNTs. Percolation theory was applied to study the electrical conductivity for different contents of MWCNTs in the epoxy nanocomposite system. Thermogravimetric analysis was employed for the assessment of the epoxy composites’ thermal properties. Nanohardness and elastic modulus were measured, and the hardness versus modulus index was calculated. Emphasis was given to the dispersion of MWCNTs in the epoxy matrix, which was assessed by both microscopy techniques and X-ray micro–computed tomography. A correlation between the optimum dispersion and MWCNTs content in terms of electrical conductivity, thermal stability, and nanomechanical properties revealed a threshold concentration at 3 phr, allowing the manufacturing of aerospace structures with multifunctional properties.

Mechanical and thermal performance of recycled glass fiber reinforced epoxy composites embedded with carbon nanotubes

2020 ◽  
Vol 33 ◽  
pp. 5029-5034
Author(s):  
Mritunjay Maharudrayya Hiremath ◽  
B.N.V.S. Ganesh Gupta K ◽  
Rajesh Kumar Prusty ◽  
Bankim Chandra Ray
Keyword(s):  
Carbon Nanotubes ◽  
Glass Fiber ◽  
Thermal Performance ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Recycled Glass ◽  
Glass Fiber Reinforced
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