scholarly journals Investigation on the Effect of NiZn Ferrite on the Mechanical and Thermal Conductivity of PLA/LNR Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Mou’ad A. Tarawneh ◽  
Dalila Shahdan ◽  
Sahrim Hj Ahmad
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Polymer Nanocomposite ◽  
Tensile Tests ◽  
Filler Loading ◽  
Poly Lactic Acid ◽  
Effective Combination ◽  
Blending Method ◽  
The Matrix ◽  
Liquid Natural Rubber

The mechanical and conductivity of magnetic polymer nanocomposite (MPNC) of nickel zinc (NiZn) ferrite nanoparticles incorporated with poly(lactic acid) (PLA) and liquid natural rubber (LNR) as compatibilizer is reported. The matrix was prepared from PLA and LNR in the ratio of 90 : 10. The MPNC of PLA/LNR/NiZn ferrite then was prepared via Thermo Haake internal mixer using melt-blending method from different filler loading from 1–5 wt% NiZn ferrite. The result of tensile tests showed that as the filler loading increases, the tensile strength also increases until an optimum value of filler loading was reached. Young’s modulus, tensile strength, and elongation at break have also increased. The study proves that NiZn ferrite is an excellent reinforcement filler in PLA/LNR matrix. The optimum thermal conductivity of PLA/LNR composites achieved with (4 wt% NiZn) due to the effective combination of NiZn-NiZn conductive networks. The scanning electron micrograph (SEM) reveal that the aspect ratio and filler orientation in the PLA/LNR matrix also strongly promoted interfacial adhesion between the filler and the matrix to control its properties.

Influence of multiwalled carbon nanotubes content on thermal conductivity of polyactic acid/liquid natural rubber nanocomposite

2016 ◽  
Vol 13 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Mou’ad A. Tarawneh ◽  
Adilah Mat Ali ◽  
Sahrim Hj Ahmad ◽  
L.J. Yu
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Natural Rubber ◽  
Polymer Nanocomposite ◽  
Multiwalled Carbon ◽  
Content Type ◽  
Blending Method ◽  
Liquid Natural Rubber ◽  
Sem Micrograph ◽  
Multi Walled Carbon Nanotubes

Purpose The purpose of this paper is to study the effects of multi-walled carbon nanotubes (MWCNTs) loading on the thermal conductivity of nanocomposites. Design/methodology/approach In this paper, the polymer nanocomposite of MWCNT nanoparticles incorporated with PLA and LNR as compatibilizer were prepared via melt blending method. Findings The result has shown that the sample with 3.5 wt.% of MWCNT content provided higher thermal conductivity which is believed to be the optimum loading that formed the suitable percolated network for phonon conduction facilitation because of better dispersion in the PLA/LNR matrix as confirmed by SEM micrograph. Originality/value Thermal conductivity of polylactic acid (PLA)/liquid natural rubber (LNR) matrix improved with MWCNT.

scholarly journals Interfacial Engineering of Graphene Nanosheets at MgO Particles for Thermal Conductivity Enhancement of Polymer Composites

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 798 ◽  
Author(s):  
Wu Pan ◽  
Miaomiao He ◽  
Li Zhang ◽  
Yi Hou ◽  
Chen Chen
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Polymer Composites ◽  
Graphene Nanosheets ◽  
High Surface ◽  
Precipitation Method ◽  
Conductivity Enhancement ◽  
Interfacial Engineering ◽  
The Matrix ◽  
Thermally Conducting

An important task in facilitating the development of thermally conducting graphene/polymer nanocomposites is to suppress the intrinsically strong intersheet π-π stacking of graphene, and thereby to improve the exfoliation and dispersion of graphene in the matrix. Here, a pre-programmed intercalation approach to realize the in situ growth of graphene nanosheets at the inorganic template is demonstrated. Specifically, microsized MgO granules with controlled geometrical size were synthesized using a precipitation method, allowing the simultaneous realization of high surface activity. In the presence of a carbon and nitrogen source, the MgO granules were ready to induce the formation of graphene nanosheets (G@MgO), which allowed for the creation of tenacious linkages between graphene and template. More importantly, the incorporation of G@MgO into polymer composites largely pushed up the thermal conductivity, climbing from 0.39 W/m∙K for pristine polyethylene to 8.64 W/m∙K for polyethylene/G@MgO (60/40). This was accompanied by the simultaneous promotion of mechanical properties (tensile strength of around 30 MPa until 40 wt % addition of G@MgO), in contrast to the noteworthy decline of tensile strength for MgO-filled composites with over 20 wt.% fillers.

Morphology and Mechanical Properties of NiZn Ferrite/Thermoplastic Natural Rubber Composite

2014 ◽  
Vol 925 ◽  
pp. 308-312 ◽  
Author(s):  
Mou'ad A. Tarawneh ◽  
Sahrim Haji Ahmad ◽  
Yu Li Jiun ◽  
Radwan Dweiri ◽  
Ibrahim N. Hassan
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Mechanical Test ◽  
Polymer Nanocomposite ◽  
Dynamic Mechanical Properties ◽  
Filler Loading ◽  
Rubber Matrix ◽  
Dynamic Mechanical ◽  
Blending Method ◽  
Thermoplastic Natural Rubber

In this paper the polymer nanocomposite of nickel zinc (NiZn) ferrite nanoparticles incorporated into the thermoplastic natural rubber nanocomposite (TPNR) were prepared via melt blending method. The effect of different NiZn loading (2-10 wt%) on morphology, tensile and dynamic mechanical properties of the obtained composites was investigated. It was found that NiZn ferrite is well dispersed in the thermoplastic natural rubber matrix. The tensile results indicated that filler loading has improved the tensile strength and Youngs modulus of the nanocomposite. However, the elongation at break decreased with increasing the percentage of NiZn. Dynamic mechanical test showed that the highest storage modulus is at 8 wt% filler. Any further increment of the filler content leads to the formation of agglomerate hence affecting the properties. The Scanning electron micrograph (SEM) micrographs reveal aspect ratio and filler orientation in the TPNR matrix also strongly promoted interfacial adhesion between the filler and the matrix to control its properties.

scholarly journals Effect of addition of different reinforcements on the microstructure and mechanical characterization of the Al-Flyash composites

2021 ◽  
Vol 15 (56) ◽  
pp. 217-228
Author(s):  
Milind K. Wasekar ◽  
Mohan P. Khond
Keyword(s):  
Tensile Strength ◽  
Hybrid Composites ◽  
Tensile Tests ◽  
Stir Casting ◽  
Interface Bonding ◽  
Casting Technique ◽  
Testing Procedures ◽  
The Matrix ◽  
Aluminum 6061 Alloy

The aim of this work is to investigate the influence of the addition of silicon carbide and molybdenum disulfide on the microstructure and the tensile strength of the Al-Flyash hybrid composites prepared using the stir casting technique. The composite with aluminum 6061 alloy as the matrix and flyash as the reinforcement, with different weight fractions, is investigated to study its microstructure and the tensile strength. The same has been compared with the hybrid composites with Aluminum-Flyash/SiC and Aluminum-Flyash/MoS2 for different weight fractions of the reinforcements. The tensile tests were conducted as per ASTM standard testing procedures at room temperature. From the results it is identified that tensile strength of the Al6061-Flyash composite is lesser than the Al6061-Flyash/SiC and Al6061-Flyash/MoS2 hybrid composites. It is also observed that increment in the composition of the SiC and MoS2 causes the increment in the tensile strength of the hybrid composite. This increment in the tensile strength is due to good interface bonding and uniform distribution of the reinforcements in the composite.

scholarly journals PENGARUH KOMPOSISI PENGISI SERTA TEKANAN HOT PRESS TERHADAP KEKUATAN TARIK KOMPOSIT POLIESTER BERPENGISI NANO PARTIKEL ZINC OXIDE (ZnO)

2019 ◽  
Vol 8 (1) ◽  
pp. 32-36
Author(s):  
Regy A Putra Ginting ◽  
Maulida
Keyword(s):  
Tensile Strength ◽  
Zinc Oxide ◽  
Filler Loading ◽  
Pressure Variation ◽  
Methyl Ethyl Ketone Peroxide ◽  
Methyl Ethyl ◽  
Hot Press ◽  
The Matrix ◽  
Polyester Composites ◽  
Scanning Electron

The aim of this research was to determine the effects of filler loading and pressure of hot press on tensile strength of zinc oxide (ZnO) filled polyester composites. The Composites were prepared by using polyester as the matrix, methyl ethyl ketone peroxide (MEKPO) as the catalyst. The composites were filled by the zinc oxide at 0%; 1%; 3%; 5%; and 7% were molded by hot press with pressure variation of 50 psi, 75 psi, 100 psi, 125 psi and 150 psi. Composites have been molded, then tested for the characteristics Scanning Electron Microscope (SEM) and tests of tensile strength. The best result of tensile strength, impact and flexural were found on the addition of 3% ZnO at a pressure of 150 psi with a tensile strength of 55,12 MPa. SEM characterization showed a rough surface on the addition of 3% ZnO at a pressure of 150 psi because had a good wetting between matrix and filler ZnO.

The Effect of CuZnFe2O4 on Mechanical Properties and Thermal Conductivity of ABS Manufactured Using 3D Printer

2020 ◽  
Vol 1010 ◽  
pp. 148-153
Author(s):  
Khairul Amali Hamzah ◽  
Yeoh Cheow Keat ◽  
Mazlee Mohd Noor ◽  
Teh Pei Leng ◽  
Shulizawat Aqzna Sazali ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Filler Content ◽  
Young's Modulus ◽  
Filler Loading ◽  
3D Printer ◽  
Full Capacity

The aim of this study is the development of the ABS-CuZnFe2O4 composites using 3D printer. In this study, the effect of filler loading on the mechanical properties and thermal conductivity is examined. The result shows that at highest filler loading (14 wt%) the tensile strength was improved approximately 98 % while the Young’s modulus increased about 23 % compared to unfilled specimen. Meanwhile, the percentage of elongation decrease approximately about 49 % when filled with 14 wt% of filler. The CuZnFe2O4 filler shows a greater effect on hardness value of the composites around 498 % at maximum filler content. The thermal conductivity of the ABS increased up to 60 % at full capacity of filler.

An Alternative Approach for FRCM Matrix Tensile Strength Evaluation

2019 ◽  
Vol 817 ◽  
pp. 365-370 ◽  
Author(s):  
Alessandro Bellini ◽  
Marco Bovo ◽  
Andrea Incerti ◽  
Claudio Mazzotti
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Mechanical Characterization ◽  
Experimental Tests ◽  
Tensile Tests ◽  
Test Methods ◽  
Test Method ◽  
The Matrix ◽  
Flexural Tests

Structural retrofitting with composite materials proved to be an effective technique for rehabilitation of degraded or damaged masonry and concrete buildings. Nowadays, Fiber Reinforced Cementitious Matrix (FRCM) composites are widely used as externally bonded strengthening systems thanks to their high performance, low weight and easiness of installation. Several experimental tests and numerical studies are currently available concerning the tensile and bond behavior of FRCM systems, but a debated and still open issue concerns the methods for the mechanical characterization of the mortar used as matrix within the strengthening system. The present paper analyses and compares different test methods for determining the matrix tensile strength. Pure tensile and flexural tests have been carried out on different mortar matrix samples. In order to evaluate which is the most suitable value to be considered for a correct interpretation and modeling of the composite system, the experimental results obtained through flexural tests on standard mortar specimens have been compared with the outcomes obtained from direct tensile tests on FRCM coupons. The present study represents only a first step for the definition of the most appropriate test method for the mechanical characterization of the matrix used within FRCM strengthening systems.

The effect of nanoparticles shape on the mechanical properties of poly lactic acid matrix

2021 ◽  
pp. 009524432098816
Author(s):  
Sajjad Daneshpayeh ◽  
Faramarz Ashenai Ghasemi ◽  
Ismail Ghasemi
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Impact Strength ◽  
Tensile Tests ◽  
Poly Lactic Acid ◽  
The Matrix ◽  
Multi Walled Carbon Nanotubes ◽  
Four Levels ◽  
Carbon Fillers ◽  
Walled Carbon Nanotubes

In this research, mechanical properties of poly lactic acid (PLA)-based nanocomposites were investigated. The nanocomposites were fabricated by adding of three types of nano-materials including multi-walled carbon nanotubes (MWCNT), carbon black (CB) nanoparticles and graphene nano-platelets (GnPs) in four levels from 0 to 3 wt.% to PLA matrix by an internal mixer. Tensile and impact tests were performed to obtain the mechanical properties of nanocomposites. Moreover, field-emission scanning electron microscopy (FESEM) was used to observe the state of nano-fillers dispersion. The FESEM images showed that CB nanoparticles and MWCNT are well distributed in the matrix, but that GnPs are agglomerated. The results of the tensile tests showed that the addition of MWCNT and CB nanoparticles increased the tensile strength by 36% and 76% and the elastic modulus by 10% and 68%, respectively. Also, the presence of all three types of carbon fillers at low loading increased the elongation at break of PLA matrix, and this increase was more significant for GnPs by 55% in the 1 wt.% loading. Finally, the PLA polymer become more brittle with the addition of nanotubes and nano-platelets, and its impact strength was reduced. While, the CB nanoparticles increased the absorbing energy and impact strength.

The fabrication and neutron shielding property of polyphenylene sulfide containing salicylic acid/Gd2O3 composites

2021 ◽  
pp. 095400832110214
Author(s):  
Yumin He ◽  
Pengcheng Li ◽  
Haohao Ren ◽  
Xi Zhang ◽  
Xiulian Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Salicylic Acid ◽  
Thermal Property ◽  
High Strength ◽  
Polyphenylene Sulfide ◽  
Nano Particles ◽  
Neutron Shielding ◽  
Aerospace Applications ◽  
Blending Method ◽  
The Matrix

A series of neutron absorbing materials with good neutron absorbing capacity, high strength and good thermal property were designed and prepared in this work. First of all, polyphenylene sulfide containing different mole content of salicylic acid (SAPPS) in the main chain was synthesized by nucleophilic substitution polymerization under high pressure. Then the composites with different content of nano Gd2O3 and modified PPS were prepared by melt blending method. The testing results indicated that the copolymers SAPPS were synthesized successfully, there was an interface interaction between nano Gd2O3 and the matrix without the need for surfactants or coupling agents. Additionally, the content of nano Gd2O3 had no obvious influence on the thermal property of the composites. While following with the increase of the content of nano Gd2O3, the tensile strength of the composites increased firstly and then decreased, when the content of nano Gd2O3 was 10 wt%, the tensile strength of 10%Gd2O3/5%SAPPS reached the maximum value of 74.9 MPa. The results of neutron shielding testing indicated that the content of nano-particles had a large effect on the neutron shielding rate of composites. The neutron shielding rate of 50%Gd2O3/5%SAPPS composite was up to 83%. All of these results indicated that the Gd2O3/5%SAPPS had potential to be applied to the high-temperature resistance and thermal shielding materials in nuclear and aerospace applications.

Research on Mechanical Properties and Wear Behavior at Extremely Low Temperature of a 16Cr-6Ni Austenitic Steel

2017 ◽  
Vol 898 ◽  
pp. 791-796
Author(s):  
Wei Gang Zhao ◽  
Guo Liang Xie ◽  
Qiang Song Wang ◽  
Dong Mei Liu
Keyword(s):  
Tensile Strength ◽  
Wear Behavior ◽  
Xrd Analysis ◽  
Tensile Tests ◽  
Testing Temperature ◽  
Impact Behavior ◽  
Dislocation Network ◽  
Plastic Behavior ◽  
Face Centered Cubic ◽  
The Matrix

The tensile strength and plastic behavior of the Cr16Ni6 steel were investigated at 298K (298K) and 76K. The yield strength and tensile strength of the alloy increased significantly with lower temperatures, from 990 MPa to 1350 MPa and from 1313 MPa to over 1800 MPa, respectively. Young’s modulus and impact behavior were found when testing temperature decreased. It was revealed from the microstructure observation conducted by scanning electron microscopy (SEM) and x-ray diffraction technique (XRD) analysis that the face-centered-cubic (FCC) structure of the matrix remained stable with a very small amount of tangent phase transformation to martensitie during the tensile tests at 76 K. The matrix grains deformed at 298K were cut apart into many small sub-grains with similar crystallographic orientation in the size of only 60-200 nm wide. Very small amount of dislocation cells or bands observed in the specimens deformed at 76 K, although many sub-grains and areas containing dislocation network were found. The formation of twin-structures along the 1/3(420) planes was found in the deformation areas at 76 K. The improvement of strength was mainly attributed to the fact that it was more difficult for the dislocation slipping along lattice planes at 76 K than at 298K, due to the reduction of the movement and diffusion abilities of atoms. The friction coefficient was found to be a little higher at 93 K than at 298 K due to the bad lubricity of the graphite material at cryogenic temperature.

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