Thermal Conductivity Augmentation in Polymeric Nanocomposites

2011 ◽  
Author(s):  
D. C. Moreira ◽  
L. A. Sphaier ◽  
L. C. S. Nunes ◽  
J. M. L. Reis
Keyword(s):  
Thermal Conductivity ◽  
Composite System ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Nano Particles ◽  
Alumina Nanoparticles ◽  
Polymeric Nanocomposites ◽  
Nanocomposite System ◽  
Alumina Particles ◽  
Different Temperatures

This paper presents an experimental analysis of the thermal conductivity of a nanocomposite system composed of a unsaturated polyester resin as matrix and alumina nanoparticles as filler. The nano particles used are 30–40 nanometers gamma alumina particles. Samples are fabricated using simple molding and no specialized homogenization equipment is used for mixing the particles with the liquid resin. The thermal conductivity is measured using the Fox-50 device, manufactured by LaserComp. Measurements are taken at different temperatures (from 0° to 50°C) for different batches of samples varying the fraction of nanoparticles used in the composite system. Finally, the thermal conductivity measurements are compared with models for predicting the thermal conductivity of composite materials with nanoparticles, showing that the obtained results are over the values estimated by these models.

Effect of surface activation of alumina particles on the performances of thermosetting-based composite materials

2019 ◽  
Vol 53 (19) ◽  
pp. 2727-2742 ◽  
Author(s):  
Abdusalam Drah ◽  
Tihomir Kovačević ◽  
Jelena Rusmirović ◽  
Nataša Tomić ◽  
Saša Brzić ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyester Resin ◽  
Linseed Oil ◽  
Unsaturated Polyester ◽  
Surface Activation ◽  
Variable Amount ◽  
Multifunctional Composites ◽  
Alumina Particles ◽  
One Step ◽  
Effect Of Surface

Two types of alumina particles, commercial (c-Al2O3) and iron doped (Fe-Al2O3), were functionalized with 3-(aminopropyl)trimethoxysilane (one-step) and two-step consecutive process, i.e. firstly using 3-(aminopropyl)trimethoxysilane followed by methyl ester of linseed oil (biodiesel) to produce Al2O3ATPMS-BD reinforcement, respectively. The effect of modifier type and variable amount of alumina particles on the dynamical and mechanical properties of unsaturated polyester resin–based composites was studied. The highest improvement of the tensile strength and micro Vickers hardness, 78.1 and 163%, respectively, was obtained at 1.0 wt% of Fe-Al2O3APTMS-BD addition. The obtained multifunctional composites can be potentially applied in construction and mining industries.

scholarly journals Thermo-Acoustical and FTIR Spectroscopic Research of Nanofluids at Different Temperatures

2020 ◽  
Vol 8 (5) ◽  
pp. 5306-5309
Keyword(s):  
Thermal Conductivity ◽  
Bond Formation ◽  
Nano Particles ◽  
Wide Spread ◽  
Nano Fluid ◽  
Cohesive Properties ◽  
Physical Chemical ◽  
Different Temperatures ◽  
Chemical Studies ◽  
Nano Fluids

In recent years the greater interest of increase in thermal conductivity have attracted because there is comparison to that of the base fluids by Nano fluids. The wide spread of nano particles of the formation nano fluid of a base fluid, takes place. These nano fluids are very much useful in thermo dynamical applications and in the study of so many physical-chemical studies. The properties of molecular of sound in nano fluids like transmission undergo changes of associated systems in highly dependent and the cohesive properties of liquids. Generally nano fluid is having high thermal conductivity values. Four different temperatures have been studied in this thermo-acoustical work and FTIR Spectrum of Coo Nano fluid at T (303.15, 308.15, 313.15 and 318.15) K. The observed results are explained in the nature of interactions and bond formation.

scholarly journals Characterization of thermo-physical and hardness properties of unsaturated polyester resin hybrid nano composites Sihama Issa Salih1, Waleed Bdaiwi Salih2, Husam Sakin Hamad2

2018 ◽  
Vol 16 (37) ◽  
pp. 136-148
Author(s):  
Sihama Issa Salih
Keyword(s):  
Thermal Conductivity ◽  
Specific Heat ◽  
Polyester Resin ◽  
Volume Fraction ◽  
Unsaturated Polyester ◽  
Matrix Material ◽  
Hardness Test ◽  
Unsaturated Polyester Resin ◽  
Hybrid Nanoparticles ◽  
Zro2 Nanoparticles

In this work, two groups of nanocomposite material, was prepared from unsaturated polyester resin (UPE), they were prepared by hand lay-up method. The first group was consisting of (UPE) reinforced with individually (ZrO2) nanoparticles with particle size (47.23nm). The second group consists of (UPE) reinforced with hybrid nanoparticles consisting of zirconium oxide and yttrium oxide (70% ZrO2 + 30% Y2O3) with particles size (83.98nm). This study includes the effect of selected volume fraction (0.5%, 1%, 1.5%, 2%, 2.5%, 3%) for both reinforcement nano materials. Experimental investigation was carried out by analyzing the thermo-physical properties like thermal conductivity, thermal diffusivity and specific heat for the polymeric composites samples, as well as the hardness test. The results showed that the values of (hardness, specific heat) increased as the nanoparticle content in composite samples increased for both groups’ nanocomposites, whereas the values of thermal conductivity and thermal diffusion decrease for both groups composites. And it was found that the properties of composite materials reinforced by hybrid nanoparticles have higher properties as compared with their counterparts of other nanocomposite reinforced by zirconia nanoparticle. The morphology of the fracture surface was showed homogeneous micro structure formation for both groups composites, indicating a good compatibility between the matrix material and the reinforcement nanoparticles.

Thermal Characterisation of Thermoset Polyester Resin Filled Recycle Expanded Polystyrene Composite with Aerogel and Alumina Additives

2013 ◽  
Vol 664 ◽  
pp. 600-604 ◽  
Author(s):  
Syed Anas Bin Syed Mustafa ◽  
Rahmah Mohamed ◽  
Nor Zaini Ikrom Zakaria ◽  
Husni Bin Rustam
Keyword(s):  
Thermal Conductivity ◽  
Silica Aerogel ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Expanded Polystyrene ◽  
Thermal Probe ◽  
K Value ◽  
Weight Percentage ◽  
Infrared Reflection ◽  
Alumina Addition

The preparation and characterization of Unsaturated Polyester Resin (UPR) filled recycled Expanded Polystyrene (EPS) composite systems were systematically investigated. Additives such as Alumina and silica aerogel powder were added to the composite for Infrared reflection and insulation enhancement. The effect of differing alumina weight percentage on the thermal properties, i.e. thermal conductivity and glass transition temperature, Tg were determined. The fabricated composite undergoes thermal analysis by using a DSC and a hand-held thermal probe, and characterized by a FTIR. There is little variation of the Tg across the samples tested. Specific heat capacity, cp from the DSC thermogram was significantly affected by incorporation of silica aerogel; 565 J/kgK compared to the unfilled sample result of 1706 kJ/kg. The thermal conductivity showed a minimum at 0.147 W m-1 K-1 from integrated silica aerogel only sample, and alumina addition increases the thermal conductivity above the minimum k value in the ranges 0.227-0.313 W m-1 K-1. Alternative Cp values from the thermal probe followed similar trend as the DSC Cp. Thermal diffusivity from the probe also showed an increase upon silica aerogel and alumina incorporation.

Preparation and Study of the Mechanical Properties of Unsaturated Polyester Resin/Graphene Nanocomposite

2019 ◽  
Vol 291 ◽  
pp. 83-90
Author(s):  
Hanaa G. Attiya ◽  
Tagreed M. Al-Saadi ◽  
Anaam W. Watan
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Tensile Strength ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Thermal Studies ◽  
Reinforcement Material ◽  
Graphene Nanocomposite ◽  
Graphene Content ◽  
Graphene Nanoparticles

Nanocomposite was prepared using unsaturated polyester (UP) resin as a matrix and graphene nanoparticles as a reinforcement material in six percentage weights (0, 0.1, 0.2, 0.3, 1 and 1.5%). Mechanical, calorimetric and thermal studies were performed on the (UP) resin/graphene nanocomposite. All tests showed a clear improvement of all mechanical properties examined (hardness, flexural strength (F.S), impact strength (I.S) and tensile strength (T.S)) with increasing graphene percentage. In addition, the temperature of glass transition and thermal conductivity of this composite increased with increasing graphene content.

A Study of Some Mechanical and Physical Properties for Palm Fiber/Polyester Composite

2020 ◽  
Vol 38 (3B) ◽  
pp. 104-114
Author(s):  
Samah M. Hussein
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Dielectric Constant ◽  
Date Palm ◽  
Volume Fraction ◽  
Unsaturated Polyester ◽  
Dielectric Strength ◽  
Palm Fiber ◽  
Mechanical And Physical Properties ◽  
Polyester Composite

This research has been done by reinforcing the matrix (unsaturated polyester) resin with natural material (date palm fiber (DPF)). The fibers were exposure to alkali treatment before reinforcement. The samples have been prepared by using hand lay-up technique with fiber volume fraction of (10%, 20% and 30%). After preparation of the mechanical and physical properties have been studied such as, compression, flexural, impact strength, thermal conductivity, Dielectric constant and dielectric strength. The polyester composite reinforced with date palm fiber at volume fraction (10% and 20%) has good mechanical properties rather than pure unsaturated polyester material, while the composite reinforced with 30% Vf present poor mechanical properties. Thermal conductivity results indicated insulator composite behavior. The effect of present fiber polar group induces of decreasing in dielectric strength, and increasing dielectric constant. The reinforcement composite 20% Vf showed the best results in mechanical, thermal and electrical properties.

Sign in / Sign up

Export Citation Format

Share Document