Surface Modified Clay Reinforced Silicon Incorporated Epoxy Hybrid Nanocomposites: Thermal, Mechanical, and Morphological Properties

2018 ◽  
Vol 9 (1) ◽  
pp. 1-22
Author(s):  
C. Karikal Chozhan ◽  
A. Chandramohan ◽  
M. Alagar
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Thermo Gravimetric Analysis ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Gravimetric Analysis ◽  
Modified Clay ◽  
Mmt Clay ◽  
Surface Modified

The silicon-containing epoxy/clay nanocomposites were developed by incorporating the surface-modified MMT clay upto 7wt% into Si-epoxy resin. The surface of the montmorillonite (MMT) clay was modified with two surface modifiers namely cetyltrimethylammonium bromide (CTAB) and 3-aminopropyltriethoxysilane (γ-APS). The surface modified clay reinforced Si-epoxy composites were developed in the form of castings, and were characterized for their thermal and mechanical properties. Thermal behaviour of the composites was characterized by differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Mechanical properties were studied as per ASTM standards. Data result from the different studies, it is inferred that the surface modified clay reinforced Si-epoxy composites exhibit lower Tg than that of neat epoxy matrix (127°C <165°C). The decomposition temperature for 60% weight loss of clay reinforced Si-epoxy composites is 674–823°C which is higher when compared to that of neat epoxy matrix. For 5wt% clay reinforced Si-epoxy composites, the values of tensile, flexural and impact strength are increased to 26%, 21% and 29% respectively. The storage modulus (E’) is increased from 5932 to 6308 MPa for clay reinforced Si-epoxy resin. XRD analysis confirmed the well-dispersed exfoliated nanocomposites structure.

SYNTHESIS OF HYBRID SiC/SiO2 NANOPARTICLES AND THEIR POLYMER NANOCOMPOSITES

2013 ◽  
Vol 12 (02) ◽  
pp. 1350008 ◽  
Author(s):  
TARIG A. HASSAN ◽  
VIJAYA K. RANGARI ◽  
FREDRIC BAKER ◽  
SHAIK JEELANI
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
High Intensity ◽  
Thermo Gravimetric Analysis ◽  
Neat Epoxy ◽  
Hybrid Nanoparticles ◽  
Gravimetric Analysis ◽  
Sonochemical Method ◽  
Thermal And Mechanical Properties ◽  
Sic Nanoparticles

In the present investigation, silicon carbide (β-SiC) nanoparticles (~ 30 nm) were coated on silicon dioxide (SiO2) nanoparticles (~ 200 nm) using sonochemical method. The resultant hybrid nanoparticles were then infused into SC-15 epoxy resin to enhance the thermal and mechanical properties of SC-15 epoxy for structural application. To fabricate an epoxy-based nanocomposite containing SiC/SiO2 hybrid nanoparticles, we have opted a two-step process. In the first step, the silica nanoparticles were coated with SiC nanoparticles using high intensity ultrasonic irradiation. In a second step, 1 wt.% of as-prepared SiC/SiO2 particles were dispersed in epoxy part-A (diglycidylether of bisphenol A) using a high intensity ultrasound for 30 min at 5°C. The part-B (cycloaliphatic amine hardener) of the epoxy was then mixed with part-A- SiC/SiO2 mixture using a high-speed mechanical stirrer for 10 min. The SiC/SiO2 /epoxy resin mixture was cured at room temperature for 24 h. The SiC nanoparticles coating on SiO2 was characterized using X-ray diffraction (XRD) and high resolution transmission electron microscope (TEM). The as-prepared nanocomposite samples were characterized using thermo gravimetric analysis (TGA) and differential scanning calorimeter (DSC). Compression tests have been carried out for both nanocomposite and neat epoxy systems. The results indicated that 1 wt.% (SiC) + (SiO2) loading derived improvements in both thermal and mechanical properties when compared to the neat epoxy system.

Carbon Fiber Powder Reinforced Epoxy Composites used for Rapid Tooling

2011 ◽  
Vol 287-290 ◽  
pp. 197-200
Author(s):  
Hai Qing Hu ◽  
Li Zhao ◽  
Jia Qiang Liu ◽  
Shi Bao Wen ◽  
Yong Jiang Gu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Rapid Tooling ◽  
Epoxy Composites ◽  
Waste Materials ◽  
Ultrasonic Time ◽  
Good For

Carbon fiber powder (CFP) instead of the traditional glass fiber (cloth) was used to reinforce epoxy resin for rapid tooling. There are two obvious advantages: one is to utilize the waste materials, which is good for the protection of the environment; another is to simplify the producing process by cast molding. The filling amount and dispersing process of CFP was studied in this paper. The results show that when the amount of CFP was 10 wt%, and the ultrasonic time is more than 15 min, the CFP can be dispersed in the epoxy matrix uniformly, and the mechanical properties can meet the requirement of epoxy molding.

scholarly journals Dielectric spectroscopy and structural characterization of nano-filler-loaded epoxy resin

2021 ◽  
pp. 2150011
Author(s):  
S. G. Thakor ◽  
V. A. Rana ◽  
H. P. Vankar ◽  
T. R. Pandit
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Structural Information ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Frequency Range ◽  
Additional Information ◽  
Lcr Meter

This work outlines the characterization of epoxy resin [Bisphenol A-(epichlorhydrin): epoxy] and hardener [[Formula: see text](3-dimethylaminopropyl)-1,3-propylenediamine] with various inorganic nano-fillers. Dielectric characterizations of epoxy, hardener, neat epoxy (epoxy + hardener) and nano-epoxy (nano-filler + neat epoxy) composites loaded with 1 wt.% of inorganic nano-fillers (SiO2, Al2O3, TiO2 and ZnO) were carried out using precision LCR meter, over the frequency range of 1 kHz–2 MHz at a constant temperature of 300.15 K. The structural information of nano-fillers, neat epoxy and nano-epoxy composites was understood by Fourier transform infrared spectroscopy and by XRD. Moreover, hardness and shear strength (shear punch) were also determined in order to gain additional information about the mechanical properties of epoxy composite. Influence of inorganic nano-fillers on the dielectric properties, structural chemistry and mechanical properties of neat epoxy composite is discussed thoroughly in this study.

Structural Analysis of Sol-Gel Derived TiO2 Nanoparticles: A Critical Impact of TiO2 Nanoparticles on Thermo-Mechanical Mechanism of Glass Fiber Polymer Composites

2021 ◽  
Author(s):  
Avinash Kumar ◽  
Abir Saha ◽  
Santosh Kumar
Keyword(s):  
Mechanical Properties ◽  
Structural Analysis ◽  
Glass Fiber ◽  
Tio2 Nanoparticles ◽  
Epoxy Matrix ◽  
Composite Laminates ◽  
Sol Gel ◽  
Epoxy Composites ◽  
Gravimetric Analysis ◽  
Dispersion Of Nanoparticles

Abstract The incorporated of inorganic nanoparticles with thermosetting epoxy polymer are an emerging field of research over past few years. It is well analyzed that epoxy matrix are brittle in nature that shows poor crack initiation and propagation and results poor thermo-mechanical properties. Therefore, researchers are showing their interest towards nanoparticles embedded epoxy composites to improve their fracture resistance (brittleness and toughness). In this investigation, the dispersion of TiO2 nanoparticles at different weight fraction (0-2%) with glass fiber reinforced epoxy composites is performed to enhance structural and thermo-mechanical properties. The TiO2 nanoparticles are prepared by sol-gel method and structural analysis of TiO2 nanoparticles shows greater interfacial bond with epoxy matrix and glass fibers due to fine dispersion of nanoparticles. From obtained results, a significant enhancement in their tensile strength (38.56%), flexural strength (30.52%), inter-laminar shear stress (25.22%), impact strength (327.10%), micro-hardness (48.53%) and fracture energy (40.19%) with minimum detrimental effect on toughness was revealed for GFRP-T1.0 compare to GFRP-T0.0 composite laminates. The stiffness and rigidity also improved up to 52.72% and 34.13% respectively for GFRP-T1.5 compare to GFRP-T0.0 composite laminates. The effects of nanoparticles contents and clustering size on thermal stability and glass transition temperature of developed composites are observed by thermo-gravimetric analysis. The surface morphology of TiO2 nanoparticles are characterized by transmission electron microscope (TEM) while dispersion of nanoparticles and failure of developed composites were analyzed by scanning electron microscopy (SEM).

The Effect of Pre-Crosslinked CTBN on the Mechanical Properties and Morphology of Epoxy Resin

2015 ◽  
Vol 1120-1121 ◽  
pp. 568-571
Author(s):  
Xiao Xue Song ◽  
Shiai Xu
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Interfacial Strength ◽  
Epoxy Composites ◽  
Acrylonitrile Copolymer ◽  
Curing Reaction ◽  
Rubber Toughened ◽  
Rubber Particles

A novel kind of rubber toughened epoxy was prepared by in situ pre-crosslinking carboxyl-terminated butadiene-acrylonitrile copolymer (CTBN) in the epoxy matrix. The in situ pre-crosslinking of CTBN was initiated by BPO, followed by the curing reaction of epoxy to form the final pre-crosslinked CTBN/epoxy composites. Mechanical properties of epoxy are further improved by the incorporation of pre-crosslinked CTBN compared with its traditional CTBN/epoxy counterparts due to the improved interfacial strength between rubber and epoxy. SEM shows that the size of phase separated rubber particles of pre-crosslinked CTBN/epoxy decreases significantly.

The Mechanical Properties of Organic Modified Epoxy Resin

2020 ◽  
Vol 43 (3) ◽  
pp. 10-14
Author(s):  
Georgel MIHU ◽  
Claudia Veronica UNGUREANU ◽  
Vasile BRIA ◽  
Marina BUNEA ◽  
Rodica CHIHAI PEȚU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Epoxy Resins ◽  
Mechanical Tests ◽  
Organic Modification ◽  
Three Point Bending ◽  
Modified Epoxy

Epoxy resins have been presenting a lot of scientific and technical interests and organic modified epoxy resins have recently receiving a great deal of attention. For obtaining the composite materials with good mechanical proprieties, a large variety of organic modification agents were used. For this study gluten and gelatin had been used as modifying agents thinking that their dispersion inside the polymer could increase the polymer biocompatibility. Equal amounts of the proteins were milled together and the obtained compound was used to form 1 to 5% weight ratios organic agents modified epoxy materials. To highlight the effect of these proteins in epoxy matrix mechanical tests as three-point bending and compression were performed.

scholarly journals High modulus polyimide particle-reinforcement of epoxy composites

2021 ◽  
Author(s):  
Johannes Essmeister ◽  
M. Josef Taublaender ◽  
Thomas Koch ◽  
D. Alonso Cerrón-Infantes ◽  
Miriam M. Unterlass ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Composite Materials ◽  
Epoxy Matrix ◽  
Epoxy Composites ◽  
High Modulus ◽  
Particle Reinforcement

A novel class of fully organic composite materials with well-balanced mechanical properties and improved thermal stability was developed by incorporating highly crystalline, hydrothermally synthesized polyimide microparticles into an epoxy matrix.

scholarly journals Biocomposites of Bio-Polyethylene Reinforced with a Hydrothermal-Alkaline Sugarcane Bagasse Pulp and Coupled with a Bio-Based Compatibilizer

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2158
Author(s):  
Nanci Vanesa Ehman ◽  
Diana Ita-Nagy ◽  
Fernando Esteban Felissia ◽  
María Evangelina Vallejos ◽  
Isabel Quispe ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Water Absorption ◽  
Sugarcane Bagasse ◽  
Thermo Gravimetric Analysis ◽  
Decomposition Temperature ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Cradle To Gate ◽  
Bagasse Pulp

Bio-polyethylene (BioPE, derived from sugarcane), sugarcane bagasse pulp, and two compatibilizers (fossil and bio-based), were used to manufacture biocomposite filaments for 3D printing. Biocomposite filaments were manufactured and characterized in detail, including measurement of water absorption, mechanical properties, thermal stability and decomposition temperature (thermo-gravimetric analysis (TGA)). Differential scanning calorimetry (DSC) was performed to measure the glass transition temperature (Tg). Scanning electron microscopy (SEM) was applied to assess the fracture area of the filaments after mechanical testing. Increases of up to 10% in water absorption were measured for the samples with 40 wt% fibers and the fossil compatibilizer. The mechanical properties were improved by increasing the fraction of bagasse fibers from 0% to 20% and 40%. The suitability of the biocomposite filaments was tested for 3D printing, and some shapes were printed as demonstrators. Importantly, in a cradle-to-gate life cycle analysis of the biocomposites, we demonstrated that replacing fossil compatibilizer with a bio-based compatibilizer contributes to a reduction in CO2-eq emissions, and an increase in CO2 capture, achieving a CO2-eq storage of 2.12 kg CO2 eq/kg for the biocomposite containing 40% bagasse fibers and 6% bio-based compatibilizer.

scholarly journals Comparative Effects of MMT Clay Modified with Two Different Cationic Surfactants on the Thermal and Rheological Properties of Polypropylene Nanocomposites

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Meshal Al-Samhan ◽  
Jacob Samuel ◽  
Fatema Al-Attar ◽  
Gils Abraham
Keyword(s):  
Rheological Properties ◽  
Relaxation Times ◽  
Sem Analysis ◽  
Differential Scanning Calorimetric ◽  
Thermally Stable ◽  
Weight Percentage ◽  
Modified Clay ◽  
Modified Polymer ◽  
Mmt Clay ◽  
Surface Modified

Polypropylene montmorillonite (MMT) nanocomposites were prepared by melt blending using two different organoclays modified with imidazolium and alkylammonium surfactants. The imidazolium and ammonium modified organoclays were characterized by the FTIR and SEM analysis. The effect of organic clay (MMT) on the physical properties of polypropylene was evaluated, thermal and rheological properties with different filler weight percentage. Differential scanning calorimetric results showed that imidazolium modified clay (IMMT) exhibits low melting temperature compared to the ammonium modified clay (AMMT). The crystallinity analysis showed that crystallization improved in all nanocomposites irrespective of surface modification; the thermogravimetric analysis showed that the imidazolium modified polymer composites are more thermally stable than conventional ammonium modified composites. The Transmission Electron Microscopy (TEM) analyses indicated that the PP-IMMT composites displayed exfoliated morphologies compared with the intercalated structure in PP-AMMT, and the rheological analysis at 180°C showed an enhancement in the viscoelastic properties as the clay concentration increases. The melt viscosity, crossover modulus, and relaxation times were comparable for both the surface modified composites with two different cations. The imidazolium based surfactant was found to be an effective organic modification for MMT to prepare thermally stable PP/MMT nanocomposites.

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