Investigation of flexural properties of hollow glass microsphere filled resin-matrix composites

2016 ◽  
Vol 45 (6) ◽  
pp. 426-430 ◽  
Author(s):  
Yingjie Qiao ◽  
Xiaodong Wang ◽  
Xiaohong Zhang ◽  
Zhipeng Xing
Keyword(s):  
Volume Fraction ◽  
Resin Matrix ◽  
Future Research ◽  
Flexural Properties ◽  
Flexural Property ◽  
Hollow Glass Microsphere ◽  
Matrix Composites ◽  
Syntactic Foams ◽  
Content Type ◽  
Hollow Glass

Purpose The purpose of this paper is to investigate the preparation and the flexural property of hollow glass microspheres (HGMs) filled resin-matrix composites, which have been widely applied in deep-sea fields. Design/methodology/approach The composites with different contents of HGMs from 47 to 57 Wt.% were studied. The voids in syntactic foams and their flexural properties were investigated. Findings The results showed that the voids quantity increased because of the increment of HGM content, whereas the exural strength and the exural modulus decreased. The fracture mechanism of the composites was also investigated by scanning electron microscope, which indicated that the composites failed by the crack extending through the microspheres. Research limitations/implications The advantages of HGMs with similar hollow spheres will be further investigated in a future research. Practical implications Results demonstrated that the properties of the composite might be tailored for specific application conditions by changing the HGM volume fraction. Originality/value The HGM filled resin-matrix composite materials have their unique properties and significant application potential. In this work, the resin-HGM composites were synthesized by mechanically mixing defined quantities of HGMs into epoxy resin, by which a kind of syntactic foams with good flexural properties could be obtained.

scholarly journals Mechanical Behaviour of Multifunctional Epoxy/Hollow Glass Microspheres/Paraffin Microcapsules Syntactic Foams for Thermal Management

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2896
Author(s):  
Francesco Galvagnini ◽  
Giulia Fredi ◽  
Andrea Dorigato ◽  
Luca Fambri ◽  
Alessandro Pegoretti
Keyword(s):  
Mechanical Properties ◽  
Thermal Management ◽  
Mechanical Behaviour ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
Hollow Glass Microsphere ◽  
Automotive Electronics ◽  
Syntactic Foams ◽  
Particle Volume ◽  
Hollow Glass

Epoxy/hollow glass microsphere (HGM) syntactic foams (SFs) are peculiar materials developed to combine low density, low thermal conductivity, and elevated mechanical properties. In this work, multifunctional SFs endowed with both structural and thermal management properties were produced for the first time, by combining an epoxy matrix with HGM and a microencapsulated phase change material (PCM) having a melting temperature of 43 °C. Systems with a total filler content (HGM + PCM) up to 40 vol% were prepared and characterized from the mechanical point of view with a broad experimental campaign comprising quasi-static, impact, and fracture toughness tests. The experimental results were statistically treated and fitted with a linear model, to produce ternary phase diagrams to provide a comprehensive interpretation of the mechanical behaviour of the prepared foams. In quasi-static tests, HGM introduction helps to retain the specific tensile elastic modulus and to increase the specific compressive modulus. The brittle nature of HGMs decreases the Charpy impact properties of the SFs, while the PCM insertion improve their toughness. This result is confirmed in KIC and GIC tests, where the composition with 20 vol% of PCM shows an increase of 80% and 370% in KIC and GIC in to neat epoxy, respectively. The most promising compositions are those combining PCM and HGMs with a total particle volume fraction up to 40 vol%, thanks to their optimal combination of thermal management capability, lightness, thermal insulation, and mechanical properties. The ability to fine-tune the properties of the SFs, together with the acquired thermal energy storage (TES) capability, confirm the great potential of these multifunctional materials in automotive, electronics, and aerospace industries.

scholarly journals Processing and properties of hollow glass microsphere particulate-filled PA2200 composites produced by selective laser sintering

2021 ◽  
Vol 261 ◽  
pp. 02016
Author(s):  
Dong Ye ◽  
Lihua Yu ◽  
Gaoyan Hou ◽  
Hong Zhu
Keyword(s):  
Volume Fraction ◽  
Selective Laser Sintering ◽  
Tensile Modulus ◽  
Laser Sintering ◽  
Glass Microsphere ◽  
Hollow Glass Microsphere ◽  
Matrix Composites ◽  
Scanning Calorimetry ◽  
Hollow Glass ◽  
Tensile Experiment

Selective laser sintering (SLS) to prepare composites by adding filler into polymer is an effective method to save costs and reinforce the sintered parts. This article investigated the fabrication of PA2200 composites filled with different volume fractions of hollow glass microsphere (HGM) by SLS. HGM was prepared by silane coupling agent surface treatment. The particle size distribution, microstructure, thermal and mechanical properties of PA2200/HGM composites were studied by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and tensile experiment. The results indicated that the density of the composite was significantly reduced compared to the neat PA2200 and the density decreased with the HGMs content increasing. HGM improved the warping deformation in the process of sintering. The tensile modulus increased while tensile strength and elongation at break decreased as a function of HGM volume fraction in a certain range. This work indicated that thermal properties and tensile properties of polyamide-matrix composites can be reinforced by adjusting HGM content, and PA2200/HGM composite powder is a good material for SLS with less density and lower cost.

Loading Effect of Hollow Glass Microsphere (HGM) and Foam Microstructure on the Specific Mechanical Properties and Water Absorption of Syntactic Foam Composite

2021 ◽  
Vol 56 ◽  
pp. 34-50
Author(s):  
Olusegun Adigun Afolabi ◽  
Krishnan Kanny ◽  
Turup Mohan
Keyword(s):  
Water Absorption ◽  
Volume Fraction ◽  
Syntactic Foam ◽  
Density Variation ◽  
Absorption Capacity ◽  
Neat Epoxy ◽  
Hollow Glass Microsphere ◽  
Hollow Glass ◽  
Marine Application ◽  
Foam Composite

AbstractEpoxy syntactic foams (SF) filled with hollow glass microspheres (HGM) were prepared by simple resin casting method and characterization in this study. The effect of varying the amount of HGM on the specific mechanical and water absorption properties of SF composites were investigated. Five different composition of SF (SFT60-0.5 to SFT60-2.5) were compared with the neat epoxy matrix. The wall thickness of the microballoons differ because of its different percentile size distribution (10th, 50th and 90th), which reflects in its density variation. The results show that the specific tensile and flexural strength increases with an increasing filler (HGM) content. The density of SF filled with HGM reduces with increasing volume fraction of filler content. Scanning electron microscopy was done on the failed samples to examine the fractured surfaces. The water absorption capacity of the SF was also investigated as it relates to the HGM volume fraction variation. All the syntactic foam composition shows a better diffusion coefficient capacity than the neat epoxy resin. This makes it applicable in structural purposes and several marine application products such as Autonomous Ultimately Vehicle (AUV).

Tensile behavior of aloe vera fiber reinforced epoxy and polyester resin matrix composites

2018 ◽  
Vol 47 (5) ◽  
pp. 440-443 ◽  
Author(s):  
M.P. Jenarthanan ◽  
Karthikeyan Marappan
Keyword(s):  
Testing Machine ◽  
Aloe Vera ◽  
Tensile Behavior ◽  
Resin Matrix ◽  
Minor Effect ◽  
Matrix Composites ◽  
Machine Model ◽  
Content Type ◽  
The Matrix ◽  
Polyester Matrix

Purpose This paper aims to investigate the tensile behavior of epoxy and polyester matrix composites reinforced with continuous and aligned aloe vera fibers. Design/methodology/approach Composites with different volume fractions (30, 40 and 50 Vol. %) were fabricated by laying the fibers in a steel mould and pouring liquid resin, either DEGEBA/TETA epoxy or methyl-ethyl ketone hardened orthophthalic polyester, under pressure of 3 MPa. The specimens were cured for 24 h at room temperature and then tested in a universal Instron testing machine, model 5582, at 298 K (25°C). Findings The fracture surface was analyzed by scanning electron microscopy (SEM) under an acceleration voltage of 15 kV. SEM fractography revealed a poor adhesion between both the epoxy and polyester matrices with the aloe vera fiber. The results showed that in both cases the introduction of aloe vera fibers had a minor effect on the matrix reinforcement. Originality/value Investigation and comparison of tensile behavior of epoxy and polyester matrix composites reinforced with continuous and aligned aloe vera fibers have not been attempted so far.

Bending Mechanical Behavior of Epoxy Matrix Reinforced with Buriti Fiber

2016 ◽  
Vol 869 ◽  
pp. 243-248 ◽  
Author(s):  
Anderson de Paula Barbosa ◽  
Giulio Rodrigues Altoé ◽  
Rômulo Leite Loiola ◽  
Frederico Muylaert Margem ◽  
Fabio de Oliveira Braga ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Epoxy Matrix ◽  
Volume Fraction ◽  
Natural Fibers ◽  
Tensile Tests ◽  
Entire Length ◽  
Bending Test ◽  
Flexural Properties ◽  
Matrix Composites ◽  
Astm Standard

Environmentally correct composites, made from natural fibers, are among the most investigated and applied today. In this paper, the mechanical behavior of epoxy matrix composites reinforced with continuous buriti fiber, through bending tensile tests was investigated. Specimens containing 0, 10, 20 and 30% in volume of buriti fiber were aligned along the entire length of a mold to create plates of these composites. The plates were cut following the ASTM standard to obtained bending test specimens. The test was conducted in an Instron Machine and the fractured specimens were analyzed by SEM. The results showed an increase in the materials flexural properties with the increase in volume fraction of buriti fiber.

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