scholarly journals Fabrication and Characterization of Graphene/Epoxy Nanocomposites

2019 ◽  
Vol 25 (4) ◽  
pp. 433-440
Author(s):  
Shiuh Chuan HER ◽  
Lei Yao CHEN
Keyword(s):  
Thermal Properties ◽  
Experimental Results ◽  
Mechanical And Thermal Properties ◽  
Epoxy Nanocomposites ◽  
Sem Images ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Thermal Stability Of

Graphene with high electric and thermal conductivities has been widely used as reinforced filler. In this study, graphene loadings in the range between 0.3 and 1.0 wt.% were added to the epoxy to fabricate the nanocomposites. The mechanical and thermal properties of nanocomposites were characterized using tensile test and differential scanning calorimeter (DSC), respectively. Experimental results show that the elastic modulus, yield strength, ultimate strength and glass transition temperature of the graphene reinforced epoxy are increasing with the increase of the graphene, while the fracture strain and toughness are decreasing with the increase of the graphene. Scanning electron microscope (SEM) was employed to investigate the dispersion and separation of graphene in the epoxy based matrix. The SEM images depict that graphene is well dispersed resulting in a significant improvement of the mechanical and thermal properties of the nanocomposites. The mechanical properties and thermal stability of epoxy nanocomposites with graphenes and multi-walled carbon nanotubes additives were then compared. Experimental results show that nanocomposite with graphene additives outperform the multi-walled carbon nanotube additives.

Mechanical and thermal characterization of grafted PP-NCC nanocomposites

2019 ◽  
pp. 089270571987822
Author(s):  
Saud Aldajah ◽  
Mohammad Y Al-Haik ◽  
Waseem Siddique ◽  
Mohammad M Kabir ◽  
Yousef Haik
Keyword(s):  
Thermal Properties ◽  
Interfacial Adhesion ◽  
Thermal Characterization ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Three Point Bending ◽  
Twin Screw ◽  
Thermal Stability Of

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.

Characterization of Polyvinyl Acetate/Multi Walled Carbon Nanotube Nanocomposites

2016 ◽  
Vol 721 ◽  
pp. 13-17
Author(s):  
Juris Bitenieks ◽  
Remo Merijs Meri ◽  
Janis Zicans ◽  
Mārtiņš Kalniņš
Keyword(s):  
Polyvinyl Acetate ◽  
Nanocomposite Films ◽  
Solution Casting ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Solution Casting Technique ◽  
Dielectrical Properties ◽  
Walled Carbon Nanotubes

Nanocomposite films from polyvinyl acetate (PVAc) dispersion and multi walled carbon nanotubes (MWCNTs) were prepared by solution casting technique. Stress-strain properties showed increase in elastic modulus and yield strength. Mechanical properties characterized by dynamic mechanical thermal analysis represented increase in storage modulus below glass transition temperature. Studied dielectrical properties of PVAc/MWCNT nanocomposites revealed formation of conductive MWCNT network in PVAc matrix.

Thermal Analysis of Polylactic Acid/Liquid Natural Rubber Reinforced with Multi-Walled Carbon Nanotubes

2016 ◽  
Vol 1133 ◽  
pp. 481-485 ◽  
Author(s):  
Adilah Mat Ali ◽  
Sahrim H. Ahmad
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Natural Rubber ◽  
Polylactic Acid ◽  
Melt Blending ◽  
Blending Method ◽  
Liquid Natural Rubber ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Thermal Stability Of

This article studies the thermal properties of multi-walled carbon nanotubes (MWCNT) reinforced polylactic acid (PLA)/liquid natural rubber (LNR) blends which prepared via melt blending method. Various percentages (0.5, 1.5, 2.5, 3.5 and 4 wt%) of MWCNT were added into PLA/LNR blend. TGA shows that the addition of MWCNT into PLA/LNR blends helps to improve thermal stability of the PLA/LNR/MWCNT nanocomposites. DSC shows that the glass transition temperature increased when 0.5%, 1.5%, 2.5% and 3.5% of MWCNT was added to the PLA/LNR blend. The cold crystallization and melting temperature were reduced when MWCNT was added in the PLA/LNR blend systems. The SEM micrographs confirm the effect of good dispersion of 3.5wt% of MWCNT in PLA/LNR blend helps to promote well combined MWCNT-matrix networks and generate the synergistic effect of the system which is improved the thermal properties significantly.

scholarly journals Vacuum Casting and Mechanical Characterization of Nanocomposites from Epoxy and Oxidized Multi-Walled Carbon Nanotubes

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 510
Author(s):  
Gerald Singer ◽  
Philipp Siedlaczek ◽  
Gerhard Sinn ◽  
Patrick Kirner ◽  
Reinhard Schuller ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Tests ◽  
Image Correlation ◽  
Sem Images ◽  
Vacuum Casting ◽  
Multi Walled Carbon Nanotubes ◽  
Properties Of Materials ◽  
Walled Carbon Nanotubes

Sample preparation is an important step when testing the mechanical properties of materials. Especially, when carbon nanotubes (CNT) are added to epoxy resin, the increase in viscosity complicates the casting of testing specimens. We present a vacuum casting approach for different geometries in order to produce specimens from functional nanocomposites that consist of epoxy matrix and oxidized multi-walled carbon nanotubes (MWCNTs). The nanocomposites were characterized with various mechanical tests that showed improved fracture toughness, bending and tensile properties performance by addition of oxidized MWCNTs. Strengthening mechanisms were analyzed by SEM images of fracture surfaces and in-situ imaging by digital image correlation (DIC).

Sign in / Sign up

Export Citation Format

Share Document