Remarkable Improvement in the Mechanical Properties of Epoxy Composites Achieved by a Small Amount of Modified Helical Carbon Nanotubes

Helical carbon nanotubes (HCNTs) were functionalized to fabricate HCNT/epoxy composites. Acid oxidation and a silane coupling agent, glycidoxypropyltrimethoxysilane (KH560), were used to modify the HCNTs. Remarkably, the flexural strength and the flexural strain were enhanced by 72.0% and 325.0%, respectively, compared to pure epoxy after adding a small amount of the KH560 modified HCNTs (K-HCNTs). Simultaneously, the tensile strength and Young’s modulus of K-HCNTs/epoxy composites were 51.3% and 270.9% higher than those of pure epoxy. It is found that the presence of silane molecules improved the dispersion of HCNTs in epoxy and the interfacial interaction. Moreover, it has been found that the mechanically interlocking effect from the helical shape of HCNTs also contributes to the improved mechanical properties of epoxy composites, compared to their straight multi-walled carbon nanotube (MWCNT) counterparts. This work provides a low-cost and efficient approach to strengthen and toughen epoxy composites.

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Improvements in mechanical properties of multi-walled carbon nanotube-reinforced epoxy composites through novel magnetic-assisted method for alignment of carbon nanotubes

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2014.05.014 ◽

2014 ◽

Vol 64 ◽

pp. 228-233 ◽

Cited By ~ 23

Author(s):

Ehsan Moaseri ◽

Majid Karimi ◽

Majid Baniadam ◽

Morteza Maghrebi

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Carbon Nanotube ◽

Epoxy Composites ◽

Multi Walled Carbon Nanotube

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Effect of Amino Functionalized Carbon Nanotubes on Thermal Mechanical Properties of Multi-Walled Carbon Nanotube/Epoxy Composites

Advanced Science Letters ◽

10.1166/asl.2015.6373 ◽

2015 ◽

Vol 21 (9) ◽

pp. 2790-2793 ◽

Cited By ~ 1

Author(s):

Kamal Sharma ◽

Kuwar Mausam ◽

Kanishka Sen Kaushalyayan

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Carbon Nanotube ◽

Epoxy Composites ◽

Functionalized Carbon Nanotubes ◽

Multi Walled Carbon Nanotube ◽

Thermal Mechanical Properties

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Hydroxyl-Terminated Triazine Derivatives Grafted Graphene Oxide for Epoxy Composites: Enhancement of Interfacial and Mechanical Properties

Polymers ◽

10.3390/polym11111866 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1866 ◽

Cited By ~ 2

Author(s):

Lichun Ma ◽

Yingying Zhu ◽

Guangshun Wu ◽

Xiaoru Li ◽

Chongao Tian ◽

...

Keyword(s):

Mechanical Properties ◽

Graphene Oxide ◽

Flexural Strength ◽

Epoxy Matrix ◽

Interfacial Interaction ◽

Epoxy Composites ◽

Functionalized Graphene Oxide ◽

Pure Epoxy ◽

Triazine Derivatives ◽

Flexural Tests

An effective approach to the fabrication of progressive epoxy nanocomposites by the incorporation of hydroxyl-terminated dendrimers functionalized graphene oxide (GO-TCT-Tris) is reported. The relationship between surface grafting, chemical construction, morphology, dispersion, and interfacial interaction as well as the corresponding mechanical properties of the composites were studied in detail. It was shown that hydroxyl-terminated triazine derivatives have been resoundingly bonded onto the GO surface through covalent bonding, which effectively improved the dispersion and compatibility of GO sheets in epoxy resin. The tensile and flexural tests manifested that the GO-TCT-Tris/epoxy composites exhibited greater tensile/flexural strength and modulus than either the pure epoxy or the GO/epoxy composites. For GO-TCT-Tris (0.10 wt%)/epoxy composite, the tensile strength and elastic modulus increased from 63 ± 4 to 89 ± 6 MPa (41.27%) and from 2.8 ± 0.1 to 3.6 ± 0.2 GPa (28.57%), and the flexural strength and modulus increased from 106 ± 5 to 158 ± 6 MPa (49.06%) and from 3.0 ± 0.1 to 3.5 ± 0.2 GPa (16.67%), respectively, compared to the pure epoxy matrix. Moreover, the fractographic analysis also illustrated the ameliorative interfacial interaction between GO-TCT-Tris and epoxy matrix.

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Mechanical Properties Of Polyaniline / Multi-walled Carbon Nanotube Composite Films

MRS Proceedings ◽

10.1557/proc-791-q10.3 ◽

2003 ◽

Vol 791 ◽

Cited By ~ 4

Author(s):

P. C. Ramamurthy ◽

W. R. Harrell ◽

R. V. Gregory ◽

B. Sadanadan ◽

A. M. Rao

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Carbon Nanotube ◽

Composite Films ◽

Weight Percent ◽

Organic Electronic Devices ◽

Multiwalled Carbon ◽

Multi Walled Carbon Nanotube ◽

Contact Devices ◽

Carbon Nanotube Composite

ABSTRACTHigh molecular weight polyaniline / multi-walled carbon nanotube composite films were fabricated using solution processing. Composite films with various weight percentages of multiwalled carbon nanotubes were fabricated. Physical properties of these composites were analyzed by thermogravimetric analysis, tensile testing, and scanning electron microscopy. These results indicate that the addition of multiwalled nanotubes to polyaniline significantly enhances the mechanical properties of the films. In addition, metal–semiconductor (composite) (MS) contact devices were fabricated, and it was observed that the current level in the films increased with increasing multiwalled nanotube content. Furthermore, it was observed that polyaniline containing one weight percent of carbon nanotubes appears to be the most promising composition for applications in organic electronic devices.

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Study on Electron Beam Curing of APTES Functionalized MWNTs/ Epoxy Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.194-196.1607 ◽

2011 ◽

Vol 194-196 ◽

pp. 1607-1610

Author(s):

Yan Yan Lu ◽

Hua Li ◽

He Zhou Liu

Keyword(s):

Mechanical Properties ◽

Electron Beam ◽

Epoxy Resin ◽

Conversion Rate ◽

Epoxy Composites ◽

Pure Epoxy ◽

Gel Content ◽

Electron Beam Curing ◽

Irradiation Process

In this study, we prepared the 3-aminopropyltriethoxysilane (APTES) functionalized MWNTs/epoxy composites by electron beam (EB) irradiation process. The modified MWNTs were characterized with SEM-EDS and FTIR. The gel content and conversion rate of epoxide groups of the EB cured pure epoxy resin and the APTES functionalized MWNTs/epoxy composites were measured and discussed. And the mechanical properties of the EB cured composites were also characterized. With addition of 0.25wt% APTES functionalized MWNTs, the Vicker’s hardness of the EB cured composite increased 100.02% compared with pure epoxy.

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The influence of functionalization time of carbon nanotube on the mechanical properties of the epoxy composites

Journal of Composite Materials ◽

10.1177/0021998317701988 ◽

2017 ◽

Vol 51 (12) ◽

pp. 1693-1701 ◽

Cited By ~ 4

Author(s):

EA Zakharychev ◽

EN Razov ◽

Yu D Semchikov ◽

NS Zakharycheva ◽

MA Kabina

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Tensile Strength ◽

Elastic Modulus ◽

Carbon Nanotube ◽

Composite Materials ◽

Polymer Composites ◽

Epoxy Composites ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

This paper investigates the structure, length, and percentage of functional groups of multi-walled carbon nanotubes (CNT) depending on the time taken for functionalization in HNO3 and H2SO4 mixture. The carbon nanotube content and influence of functionalization time on mechanical properties of polymer composite materials based on epoxy matrix are studied. The extreme dependencies of mechanical properties of carbon nanotube functionalization time of polymer composites were established. The rise in tensile strength of obtained composites reaches 102% and elastic modulus reaches 227% as compared to that of unfilled polymer. The composites exhibited best mechanical properties by including carbon nanotube with 0.5 h functionalization time.

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