Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides

The effects of ammonia-treated graphene oxide (GO) on composites based on epoxy resin were investigated. Ammonia solutions of different concentrations (14–28%) were used to modify GO. Nitrogen functional groups were introduced on the GO surfaces without significant structural changes. The ammonia-treated GO-based epoxy composites exhibited interesting changes in their mechanical properties related to the presence of nitrogen functional groups, particularly amine (C-NH2) groups on the GO surfaces. The highest tensile and impact strength values were 42.1 MPa and 12.3 J/m, respectively, which were observed in an epoxy composite prepared with GO treated with a 28% ammonia solution. This improved tensile strength was 2.2 and 1.3 times higher than those of the neat epoxy and the non-treated GO-based epoxy composite, respectively. The amine groups on the GO ensure its participation in the cross-linking reaction of the epoxy resin under amine curing agent condition and enhance its interfacial bonding with the epoxy resin.

[1]  Young-Seak Lee,et al.  Effect of fluorination on the mechanical behavior and electromagnetic interference shielding of MWCNT/epoxy composites , 2016 .

[2]  Young-Seak Lee,et al.  Functionalization of graphene oxide by fluorination and its characteristics , 2016 .

[3]  Young-Seak Lee,et al.  Improvement of the mechanical and thermal properties of polyethersulfone-modified epoxy composites , 2016 .

[4]  M. P. Jayakrishnan,et al.  Mechanical, thermal and dielectric properties of hybrid composites of epoxy and reduced graphene oxide/iron oxide , 2016 .

[5]  R. Zahari,et al.  The influence of multiscale fillers on the rheological and mechanical properties of carbon-nanotube–silica-reinforced epoxy composite , 2015 .

[6]  D. J. Lee,et al.  Thermal conductivity of a silicon carbide/pitch-based carbon fiber-epoxy composite , 2015 .

[7]  B. Mortazavi,et al.  Alignments and network of graphite fillers to improve thermal conductivity of epoxy-based composites , 2015 .

[8]  Chung-Sung Tan,et al.  Using supercritical CO2-assisted mixing to prepare graphene/carbon nanotube/epoxy nanocomposites , 2015 .

[9]  G. Marosi,et al.  Development of natural fibre reinforced flame retarded epoxy resin composites , 2015 .

[10]  Meng Zhang,et al.  Mechanical properties of a self-healing fibre reinforced epoxy composites , 2015 .

[11]  M. Ansari,et al.  Mechanical properties of graphene oxide (GO)/epoxy composites , 2015 .

[12]  Tapas Kuila,et al.  Simultaneous reduction, exfoliation, and nitrogen doping of graphene oxide via a hydrothermal reaction for energy storage electrode materials , 2014 .

[13]  Seho Cho,et al.  Mechanical and thermal properties of MWCNT-reinforced epoxy nanocomposites by vacuum assisted resin transfer molding , 2014 .

[14]  D. V. D. Merwe,et al.  Classification of Toxic Cyanobacterial Blooms by Fourier-Transform Infrared Technology (FTIR) , 2013 .

[15]  Liping Zhao,et al.  Fabrication of exfoliated graphene-based polypropylene nanocomposites with enhanced mechanical and thermal properties , 2011 .

[16]  Amy M. Peterson,et al.  Covalent incorporation of aminated nanodiamond into an epoxy polymer network. , 2011, ACS nano.

[17]  Chaofu Wu.  Competitive absorption of epoxy monomers on carbon nanotube: A molecular simulation study , 2011 .

[18]  A. Tcharkhtchi,et al.  Mechanical properties of multi-walled carbon nanotube/epoxy composites , 2010 .

[19]  M. Gabr,et al.  Effect of microfibrillated cellulose on mechanical properties of plain-woven CFRP reinforced epoxy , 2010 .

[20]  W. Lu,et al.  Improved synthesis of graphene oxide. , 2010, ACS nano.

[21]  Jang‐Kyo Kim,et al.  Dispersion, interfacial interaction and re-agglomeration of functionalized carbon nanotubes in epoxy composites , 2010 .

[22]  Yiping Guo,et al.  Effects of carbon nanotube functionalization on the mechanical and thermal properties of epoxy composites , 2009 .

[23]  B. Saikia,et al.  A X-ray diffraction analysis on graphene layers of Assam coal , 2009 .

[24]  A. Ferrari,et al.  Raman spectroscopy of graphene and graphite: Disorder, electron phonon coupling, doping and nonadiabatic effects , 2007 .

[25]  Andre K. Geim,et al.  Raman spectrum of graphene and graphene layers. , 2006, Physical review letters.

[26]  Hideyuki Takagi,et al.  XRD analysis of carbon stacking structure in coal during heat treatment , 2004 .

[27]  Chuck Zhang,et al.  Investigation of molecular interactions between (10, 10) single-walled nanotube and Epon 862 resin/DETDA curing agent molecules , 2004 .

[28]  Khan,et al.  Effects of , 2000, The Journal of organic chemistry.