Structure and Properties of Epoxy/Fly Ash System: Influence of Filler Content and Surface Modification

Stimoniaris, Adam; Skoura, E.; Gournis, Dimitrios; Karakassides, Michael A.; Delides, C.G.

doi:10.1007/s11665-019-04215-8

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…These types of dispersion procedures are required because they promote the dispersion of nanofillers from an agglomerated state to a homogeneous state. The most commonly used dispersion methods are sonication, [39,40] three roll milling, [41] planetary mixer, [42] mechanical stirring and sonication, [43] magnetic stirring and ball milling [44,45] and planetary centrifugal mixing and three-roll milling. [46] From the above studies, it was observed that the combined effect of the low-filler concentration of alumina nanoparticles and the graphene nanoplatelets for the improvement of physical and mechanical properties of the composites were not yet reported.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of physical, flexural, and dynamic mechanical properties of alumina and graphene nanoplatelets filled epoxy nanocomposites

Kesavulu

Mohanty

2022

Polymer Composites

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In this research, the different weight percentages of alumina and graphene nanoplatelets were homogeneously dispersed in the epoxy resin by a sonication and ball milling mixing process. The effect alumina and graphene nanoplatelets filled epoxy nanocomposites of physical, flexural, and dynamic mechanical properties were investigated. The epoxy nanocomposites showed a significant enhancement of 43.5% flexural strength and 29.5% flexural modulus for the combined filler loading of 2 wt% of alumina and 0.5 wt% of graphene nanoplatelets sample (EA2G0.5) than the neat epoxy. The EA2G0.5 epoxy nanocomposites sample showed an enhancement of 68.1% for the storage modulus. The loss modulus peak shifts toward the right side than the neat epoxy, which is showing better thermal stability of the composite. The differential scanning calorimetry technique was used to study the curing characteristics of the epoxy and epoxy nanocomposites. The scanning electron microscopy images of a fractured surface of the neat epoxy and alumina and graphene nanoplatelets filled epoxy nanocomposites showed the dispersion of the fillers, which is the sole cause of the enhancement of flexural properties. In general, these developed nanocomposites are suitable to be used as parent material in electrical and electronic packaging applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of physical, flexural, and dynamic mechanical properties of alumina and graphene nanoplatelets filled epoxy nanocomposites

Kesavulu

Mohanty

2022

Polymer Composites

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“…The improved dispersion of KH‐570‐modified CaCO 3 in PVC leads to enhanced friction with the matrix and consequently higher loss modulus. Following the thiol‐ene click reaction, the elongation of the curled molecular chains on the CaCO 3 surface leads to lower frictional forces 31,32 . Nevertheless, the loss modulus is still higher than that of pure PVC.…”

Section: Resultsmentioning

confidence: 99%

“…Following the thiolene click reaction, the elongation of the curled molecular chains on the CaCO 3 surface leads to lower frictional forces. 31,32 Nevertheless, the loss modulus is still higher than that of pure PVC.…”

Section: Dma Testmentioning

confidence: 96%

Surface modification of calcium carbonate by thiol‐ene click reaction and its effect on the performance of PVC composite

Sun,

Zhang,

Zhang

et al. 2023

J of Applied Polymer Sci

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Disposable PVC gloves are cost effective, but their mechanical properties can be compromised at extremely high concentrations of plasticizers. The tensile properties of PVC gloves can be improved by incorporating modified fillers into the PVC matrix. In this research, calcium carbonate (CaCO3) was functionalized with γ‐methacryloxy propyl trimethoxyl silane (KH‐570) and then further modified through a click reaction with n‐Octadecyl mercaptan. Fourier‐transform infrared spectroscopy and X‐ray photoelectron spectroscopy have confirmed that n‐Octadecyl mercaptan‐modified KH‐570 was successfully grafted onto the surface of CaCO3. Composite films were manufactured by blending either pristine CaCO3 or modified CaCO3 with PVC resin paste and their tensile properties, light transmission, moisture permeability, and solvent resistance were evaluated. Compared with CaCO3/PVC and KH‐570‐modified CaCO3/PVC composite films, n‐Octadecyl mercaptan‐modified CaCO3/PVC composite films showed higher light transmittance, lower moisture permeability, and higher tensile properties. Dynamic mechanical analysis revealed that these films had low glass transition temperatures, thus broadening their applicability to low‐temperature conditions.

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“…To prepare fly ash composites, a mixture of mechanical and ultrasonic agitation was employed at concentrations of 1 wt.%, 5 wt.% and 15 wt.%. [ 8 ] The results showed that the fly ash was well dispersed in the epoxy matrix. Properties of fly ash/epoxy composites with four different weight fraction of fly ash (i.e.…”

Section: Introductionmentioning

confidence: 99%

Research on mechanical properties and fire retardancy of epoxy composites reinforced by fly ash of thermal power plant

Nguyen,

Van Ngo

2023

Vietnam Journal of Chemistry

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Flame retardants (FRs) play an important role as additives which is applied in a wide range of products because they can inhibit ignition to delay the spread of fire. By adding fly ash (a waste of thermal power plants), we have developed an epoxy resin material with good flame retardant properties. Besides, using the fly ash can reduce the consumption of current flame retardants (organic halogen compounds) and thus meet the environmental safety of flame retardant epoxy resin. For this reason, studies on enhancing the flame retardancy of epoxy resin using fly ash as an eco‐friendly additive have paid more attention. Adding fly ash flame retardant additives to epoxy resin can improve the oxidation resistance of target materials. In this study, fly ash was modified with Ca(OH)2 to improve its flame retardant ability and compatibility with epoxy resin. The results show that the samples get higher flame retardant when using 30 wt.%, 40 wt.% and 50 wt.% fly ash. Flame retardant is assessed by the determination of the limiting oxygen index (LOI) and the burning rate test according to the UL94 method. The results show that at the mixing ratio of 40% fly ash, the LOI index is 24.4% and the burning rate according to the UL 94HB method is 19.56 mm/min. When increasing the fly ash content from 30 to 50 wt%, the flame retardant ability increases while the tensile strength, flexural strength and Izod impact strength decrease. For the compressive strength, it increases and maintains at a specified level. The results of this study suggest that fly ash would be a capable candidate for petroleum‐based flame retardant additives.

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Structure and Properties of Epoxy/Fly Ash System: Influence of Filler Content and Surface Modification

Cited by 6 publications

References 27 publications

Investigation of physical, flexural, and dynamic mechanical properties of alumina and graphene nanoplatelets filled epoxy nanocomposites

Investigation of physical, flexural, and dynamic mechanical properties of alumina and graphene nanoplatelets filled epoxy nanocomposites

Surface modification of calcium carbonate by thiol‐ene click reaction and its effect on the performance of PVC composite

Research on mechanical properties and fire retardancy of epoxy composites reinforced by fly ash of thermal power plant

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