Preparation of Fly Ash/Epoxy Composites and Its Effects on Mechanical Properties

Sim, Jeesoo; Kang, Youngjeong; Kim, Byung Joo; Park, Taesung; Lee, Young Cheol

doi:10.3390/polym12010079

Cited by 73 publications

(48 citation statements)

References 27 publications

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“…In this study, the size of fly ash particles is small, ranging from 10 µm to 35 µm, compared to that in the work of Sim et al As Sim et al concluded, the smaller the fly ash particle size is, the more improved the mechanical properties will be [8].…”

Section: Structural Morphology Of Composite Materials Based Onmentioning

confidence: 67%

“…Furthermore, they are essentials in insulating systems and electrical equipments such as cast resin dry transformers, generators, and breaker switches [4][5][6]. In process, not only electricity influences on those machines but also temperature and mechanics, so it is needed to prevent them from fire and explosion [7,8]. e use of fly ash and nanoclay in creating nanopolymer has been well known recently [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Properties of Epoxy Composites Using Fly Ash as an Additive in the Presence of Nanoclay: Mechanical Properties, Flame Retardants, and Dielectric Properties

Nguyen

Pham

2020

Journal of Chemistry

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Small and light fly ash is a by-product of thermal power plants, in which oxides mainly present in fly ash are suitable to reinforce composite materials. Its content accounts for 10, 20, 30, 40, and 50% of those materials. However, due to the smooth surface, it cannot stick completely in plastics. Therefore, in this work, it was studied to combine nanoclay additive (I.30 E) with 1, 3, and 5% by weight to synergize to improve mechanical strength, fire retardation, and electrical properties. Mechanical properties and flame retardant properties have improved markedly. At the combined ratio of 40% by weight of fly ash and 3% nanoclay, nanocomposites have tensile strength values of 64.12 MPa, flexural strength of 89.27 MPa, compressive strength of 215.23 MPa, and impact resistance of Izod 14.45 kJ/m2, oxygen index limited to 26.8% of fire retardant material. In terms of dielectric strength, the electric strength of pure epoxy is 17.5 kV/mm, higher than that before adding nanoclay (12.7 kV/mm). The presence of nanoclays in the material creates a tortuous electric path, slowing the propagation of the power plant, which is the main factor that improves the breaking strength of the nanocomposite.

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Section: Structural Morphology Of Composite Materials Based Onmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Study on the Properties of Epoxy Composites Using Fly Ash as an Additive in the Presence of Nanoclay: Mechanical Properties, Flame Retardants, and Dielectric Properties

Nguyen

Pham

2020

Journal of Chemistry

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“…[ 12 ] Recently, the utilization of FA as a reinforcement in polymer composites has received much attention because of its numerous advantages such as low cost, low density, high strength, and good thermal resistance. [ 13–17 ] Moreover, the incorporation of FA in polymers may alleviate some of the related environmental damage, while economizing on conventional costly inorganic fillers. [ 18 ]…”

Section: Introductionmentioning

confidence: 99%

Effect of fly ash and coupling agent on the structural, morphological, thermal, and mechanical properties of polyamide 6/acrylonitrile‐butadiene‐styreneblend

et al. 2021

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In the present study, coal fly ash (FA) was used as a reinforcement in a thermoplastic matrix blend of polyamide 6/acrylonitrile‐butadiene‐styrene (PA/ABS). In the first part of this work, the as‐received FA (raw FA) was sieved with a 25 μm sieve to obtain FA with particle size less than 25 μm (FA). Then, the physicochemical properties of the raw FA and the FA were determined. Afterwards, FA was used to prepare a masterbatch of 20 wt% FA and 80 wt% PA by twin‐screw extrusion. Using this masterbatch, composites with different FA contents (4.5, 9, 14, and 18.5 wt%), with and without styrene‐(ethylene‐butylene)‐styrene grafted with maleic anhydride (SEBS‐g‐MA) (S‐g‐M), were produced by extrusion, which was followed by injection molding. Subsequently, several characterization techniques were performed to investigate the effect of FA loading and the S‐g‐M coupling agent on the structural, morphological, thermal, and mechanical properties of the developed composites. The results showed that incorporating FA particles in the matrix blend improved the thermal stability and crystallinity, the Young's modulus, the tensile strength, and torsional properties of the composites. In contrast, the addition of S‐g‐M coupling agent to the polymer composites improved the interfacial adhesion between FA particles and the matrix blend. This further enhanced the structural, morphological, thermal, and mechanical properties of the polymer composites. Overall, the use of FA as an inorganic filler improves the thermal and mechanical properties of polymer composites and shows a potential for promising applications.

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“…Two combinations of materials used were P20 as a mold base and MEC as mold inserts (core and cavity inserts). The fabrication steps for the MEC mold inserts include the degassing of the epoxy resin mixed with metal fillers in a vacuum chamber to remove air bubbles, the pre-curing at room temperature, and the post-curing in the oven based on the control factors of curing temperature and duration of curing time [ 12 , 13 , 27 , 43 , 44 , 45 ]. After the post-curing process, the finishing work using machining operations for fitting the mold standard components (ejector pins, sprue bushing, etc.)…”

Section: Methodsmentioning

confidence: 99%

Hybrid Mold: Comparative Study of Rapid and Hard Tooling for Injection Molding Application Using Metal Epoxy Composite (MEC)

et al. 2021

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The mold-making industry is currently facing several challenges, including new competitors in the market as well as the increasing demand for a low volume of precision moldings. The purpose of this research is to appraise a new formulation of Metal Epoxy Composite (MEC) materials as a mold insert. The fabrication of mold inserts using MEC provided commercial opportunities and an alternative rapid tooling method for injection molding application. It is hypothesized that the addition of filler particles such as brass and copper powders would be able to further increase mold performance such as compression strength and thermal properties, which are essential in the production of plastic parts for the new product development. This study involved four phases, which are epoxy matrix design, material properties characterization, mold design, and finally the fabrication of the mold insert. Epoxy resins filled with brass (EB) and copper (EC) powders were mixed separately into 10 wt% until 30 wt% of the mass composition ratio. Control factors such as degassing time, curing temperature, and mixing time to increase physical and mechanical properties were optimized using the Response Surface Method (RSM). The study provided optimum parameters for mixing epoxy resin with fillers, where the degassing time was found to be the critical factor with 35.91%, followed by curing temperature with 3.53% and mixing time with 2.08%. The mold inserts were fabricated for EB and EC at 30 wt% based on the optimization outcome from RSM and statistical ANOVA results. It was also revealed that the EC mold insert offers better cycle time compared to EB mold insert material.

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Preparation of Fly Ash/Epoxy Composites and Its Effects on Mechanical Properties

Cited by 73 publications

References 27 publications

Study on the Properties of Epoxy Composites Using Fly Ash as an Additive in the Presence of Nanoclay: Mechanical Properties, Flame Retardants, and Dielectric Properties

Study on the Properties of Epoxy Composites Using Fly Ash as an Additive in the Presence of Nanoclay: Mechanical Properties, Flame Retardants, and Dielectric Properties

Effect of fly ash and coupling agent on the structural, morphological, thermal, and mechanical properties of polyamide 6/acrylonitrile‐butadiene‐styreneblend

Hybrid Mold: Comparative Study of Rapid and Hard Tooling for Injection Molding Application Using Metal Epoxy Composite (MEC)

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