scholarly journals Influence of graphene nano-platelets dispersion on the thermo-physical properties of sunflower oil

2021 ◽  
pp. 18-18
Author(s):  
Raj Bensam ◽  
M. Muthuraj
Keyword(s):  
Thermal Stability ◽  
Surface Tension ◽  
Temperature Rise ◽  
Sunflower Oil ◽  
Arrhenius Equation ◽  
Step Method ◽  
Sem Micrograph ◽  
Thermo Physical Properties ◽  
Range Density ◽  
Thermal Stability Of

In this article, thermal stability, viscosity, density and surface tension of Graphene nano-platelets dispersed sunflower oil are experimentally determined by varying the Graphene concentration (0.1-1.1wt%) and temperature (40-100?C). The SEM micrograph and the EDS spectra are used to characterize the Graphene. Nanofluids are prepared by ultrasonication technique (two-step method) and the maximum thermal stability of about 280?C is achieved at 1.1wt% Graphene nanofluids. The dynamic viscosity diminished in an exponential shape in acquiescence with Arrhenius equation and the densities of samples are characteristic with linear decrement in the estimated temperature range. Density and surface tension increases with the Graphene concentration, while a reverse trend is observed with temperature rise. The maximum thermal stability, viscosity, density and surface tension is obtained in the nanofluid with 1.1 wt% concentration and the minimum is obtained in the nanofluid with 0.1 wt% concentration.

Thermo-physical behaviors of carbon nanofiber reinforced polylactic acid

2013 ◽  
Vol 1505 ◽  
Author(s):  
Ananta Raj Adhikari ◽  
Kamal Sarkar ◽  
Karen Lozano
Keyword(s):  
Thermal Stability ◽  
Polylactic Acid ◽  
Carbon Nanofiber ◽  
Water Soluble ◽  
Steady Increase ◽  
Future Technology ◽  
Large Numbers ◽  
Stage Crystallization ◽  
Thermo Physical Properties ◽  
Thermal Stability Of

ABSTRACT:Studies have demonstrated that the reinforcement of polymeric matrices using nanofiller can results with better thermo-physical properties of polymer. Carbon nanofiber (CNF) is a unique quasi-one dimensional nanostructure with large numbers of edges and defects compared to carbon nanotube (CNT). Further the availability in large quantity along with lower cost makes them an important nanomaterial for future technology. We have previously used CNF in different thermoplastic polymers. In this study CNFs were used with water soluble thermoplastic aliphatic polyster polylactic acid (PLA) and studied their thermal and mechanical properties. Thermal analysis using Thermogravimetric Analysis showed enhanced thermal stability of the polymer at higher nanotube loading (>1 wt%) and decrease of thermal stability at higher loading (>10 wt%). Crystallization thermogram of PLA was modified heavily with the addition of nanofibers changing clearly from one stage to two stage crystallization. In addition, CNF facilitates the crystallization of PLA resulting in an increase of its crystallization. The mechanical testing showed the steady increase of modulus of the composites with the nanofiber content within the range of study which can be regarded as due to the change in interface property of the composites.

Mechanochemical Assisted Modification of Parawood Microcrystalline Cellulose Using Silane Coupling Agent and their Composites Properties

2018 ◽  
Vol 775 ◽  
pp. 57-62 ◽  
Author(s):  
Patcharaporn Chuayplod ◽  
Duangdao Aht-Ong
Keyword(s):  
Thermal Stability ◽  
Microcrystalline Cellulose ◽  
Water Resistance ◽  
Surface Composition ◽  
Mechanochemical Reaction ◽  
Polypropylene Composites ◽  
Sem Micrograph ◽  
Reinforcing Material ◽  
Hydrolysis Of ◽  
Thermal Stability Of

Surface treated parawood microcrystalline cellulose (PW-MCC) performed under mechanochemical reaction using planetary ball milling at ambient temperature was used as a reinforcing material in polypropylene composites. Initially, PW-MCC was prepared by acid hydrolysis of parawood sawdust pulp. After that, PW-MCC was treated with vinyltrimethoxysilane at milling speed 400 rpm for 60 min. The surface composition from XPS indicated the existence of silicon atom on silane-treated PW-MCC. The thermal stability of PW-MCC was also improved and SEM micrograph revealed rough surface after modification reaction. The untreated PW-MCC and treated PW-MCC were applied to prepare polypropylene composites at 5-30 wt% loading content without a compatibilizer. The results demonstrated that silane-treated PW-MCC/PP composites enhanced tensile strength, thermal stability and water resistance of the composites.

Experimental Study on the Thermal Stability of Surfactant Aqueous Solutions

2014 ◽  
Vol 926-930 ◽  
pp. 119-123
Author(s):  
Xin Nan Song ◽  
Ju Lei Jin ◽  
Yu Wang ◽  
Xiang Long Li
Keyword(s):  
Thermal Stability ◽  
Surface Tension ◽  
Ionic Surfactant ◽  
Equilibrium Surface ◽  
Equilibrium Surface Tension ◽  
Chemical Effects ◽  
Surface Active ◽  
Thermal Stability Of ◽  
Better Than

Based on the determination of the equilibrium surface tension for anionic surfactant SDS and non-ionic surfactant TrionX-100 under different concentrations, the two surfactants continuous boiling test and the SDS for the hydrolysis tests were carried out. Objective is to analyze the diminishing process for active ingredient of the surfactants. Results show that the liquid with surfactant is capable of reducing the surface tension. With the increment of surfactant concentration, the surface tension decreases gradually, and the surface tension is minimized under the critical micelle concentration (CMC); When the concentration lower than CMC, the surface-active of TritonX-100 presented is stronger than the SDS. At continuous boiling experiment, the thermal stability of TritonX-100 solution is better than the SDS. When the SDS aqueous solution is in the sealed environment with set temperature and the continuous boiling environment under experiment situation, the active ingredients of SDS solution will change and the equilibrium surface tension will be undermined. Owing to the chemical losses, the inherent characteristics of solution perform dramatically different from the original one during boiling experiment, which includes the hydrolytic destruction and micro-layer pyrolysis chemical effects.

scholarly journals Application of Silica Supported Calix[4]arene Derivative as Anti-reversion Agent in Tire Tread Formulation

2021 ◽  
Vol 68 (1) ◽  
pp. 128-136
Author(s):  
Hediye Mohamadi ◽  
Fereshteh Motiee ◽  
Saeed Taghvaei-Ganjali ◽  
Mandana Saber-Tehrani
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Temperature Rise ◽  
Tensile Testing ◽  
Polymer Chains ◽  
Arene Derivative ◽  
Oh Groups ◽  
Test Pieces ◽  
Curing Characteristics ◽  
Thermal Stability Of

In this research the influence of the silica supported calix[4]arene derivative (SS-Calix) on the reversion resistance, mechanical properties and thermal behavior of NR/BR tire tread formulation was investigated by the oscillating disc rheometer, FTIR, TGA and tensile testing. The results revealed that the reversion behavior of NR/BR vulcanizate is affected by SS-Calix. The data obtained from curing characteristics and thermal stability of test pieces indicate that, SS-Calix acts as an anti-reversion for rubbery materials that are exposed to thermal shock in the early stages of temperature rise. It’s predicted that these results are due to the interaction between the OH groups present in the SS-Calix surface and the carbon of the polymer chains. The broad peak observed in the IR spectrum around 1824 cm−1 which is referred to C=O bond, confirms this prediction. In addition, the presence of SS-Calix in compound causes to increase modulus and hardness but reduce elongation and resilience.

Electron Beam Induced Thermal Effects in Amorphous Se64As16Au20 Thin Films

1974 ◽  
Vol 32 ◽  
pp. 478-479
Author(s):  
P. B. Mee
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Electron Beam ◽  
Electron Microscope ◽  
Temperature Rise ◽  
Thermal Effects ◽  
Carbon Films ◽  
Maximum Temperature ◽  
Maximum Temperature Rise ◽  
Thermal Stability Of

It is the purpose of this paper to describe some preliminary observations on the thermal stability of Se64As16Au20 alloy thin films and to relate crystallization, melting, vaporization, etc., to the input electron beam flux and estimated maximum temperature rise. Thin films were produced from 80:20 arsenic modified selenium glass and gold for this study. Co-deposition was carried out on 600Å thick carbon films (at 25°C) supported on 200 mesh copper electron microscope grids(≈10−6 Torr)

The effects of tomato and pepper peel carotenoids on thermal stability of sunflower oil

2019 ◽  
Vol 305 ◽  
pp. S59
Author(s):  
C.N. Predescu ◽  
L.I. Ilie ◽  
M. Georgescu ◽  
S. Raita ◽  
M.O. Ghimpeteanu
Keyword(s):  
Thermal Stability ◽  
Sunflower Oil ◽  
Thermal Stability Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

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