The Effect of Nanoparticles Percentage on Mechanical Behavior of Silica-Epoxy Nanocomposites

Islam, Saiful; Masoodi, Reza; Rostami, Hossein

doi:10.1155/2013/275037

Cited by 85 publications

(48 citation statements)

References 68 publications

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“…6). This agglomeration generated stress concentration at the agglomerated particles and decreased the mechanical properties of the PMMA matrix [23][24][25] . Thus, the FS in the groups containing >1% silanized NPs was reduced, however, there was no significant differences in FM between these groups.…”

Section: Discussionmentioning

confidence: 99%

The synthesis, modification, and application of nanosilica in polymethyl methacrylate denture base

Jiangkongkho

Arksornnukit

Takahashi

2018

Dental Materials Journal

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This study aimed to investigate amount of γ-methacryloxypropyltrimethoxysilane (MPS) silanized on experimental nanosilica particles (NPs), amount of NP and amount of MPS silanized NP on flexural strength (FS), flexural modulus (FM), and fracture toughness (FT) of NP reinforced polymethyl methacrylate (PMMA). The chemisorbed amount of MPS was determined using elemental analysis. Six groups (n=8) were prepared with chemisorbed amount and mixed with PMMA-monomer to make 0.25, 0.5, 1, 5, 10 and 15% (w/w) of NP reinforced PMMA. PMMA without NP served as control. Seven groups (n=8) were prepared with 1% of NP silanized with 0, 0.061, 0.123, 0.246, 0.493, 0.987, and 1.974 gMPS/gsilica and mixed with PMMA-monomer to make NP reinforced PMMA. FS, FM, and FT were determined using 3-point bending test. One-way ANOVA and multiple comparisons showed that 0.246 gMPS/gsilica of 1% amount of silanized NP group was significantly highest in FS, FM, and FT compared to the others (p<0.05).

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Section: Discussionmentioning

confidence: 99%

The synthesis, modification, and application of nanosilica in polymethyl methacrylate denture base

Jiangkongkho

Arksornnukit

Takahashi

2018

Dental Materials Journal

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“…Welldispersed silica nanoparticles stiffen and toughen an epoxy adhesive more efficiently than silica microparticles owing to their larger surface-to-volume ratio, forming a more substantial matrix-filler interface area at a given weight fraction [1][2][3][4][5][6][7]. However, without any treatment, high-silica-content nanoparticles are difficult to disperse uniformly using a conventional mechanical mixer and tend to aggregate/agglomerate in the epoxy matrix [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Silica nanoparticles stiffen epoxy efficiently at low-strainrate loading [19]. Islam et al [7] showed that dynamic stiffness increases with silica particle content dispersed in the epoxy matrix. However, such studies focused on single-size silica-filled epoxy dynamic behavior at high-strain-rate loading.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Mixed Silica Micro-nanoparticles on Compressive Dynamic Stiffness and Damping of Epoxy Adhesive

Yohanes

Sekiguchi

2018

J. dynamic behavior mater.

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Dynamic stiffness and damping of epoxy adhesives are critical for ensuring the safety, reliability, and comfort of structures subjected to vibrations and impact loads. This study conducts split Hopkinson pressure bar (SHPB) tests to investigate the synergistic effects of silica micro-nanoparticles on these critical properties. Micro-nanoparticle content and composition ratio purity are varied at 2, 5, and 10% by weight (wt%) and from 0% (pure microparticles) to 100% (pure nanoparticles), respectively. Positive simultaneous stiffening and energy absorption effects are observed at a silica content of 5 wt% owing to improved nanoparticle dispersion; this increases the interface area and induces cooperative matrix-filler interactions. At this silica content and a composition ratio of 50%, stiffness and damping are 45 and 40% larger than those of neat epoxy, respectively. Silica micro-nanoparticles are less effective in improving particle dispersion at more than 5 wt%. Conventional mechanical dispersion is limited to applications below a certain silica content; the results suggest a simple, low-cost dispersion technique as an alternative to the in-situ technique and provide options for designing epoxy stiffness and damping appropriate for specific applications.

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“…On the other hand, with the rapid progress in nanotechnology, nano‐sized inorganic particles are also of great interest for improving material properties . It has been reported that the dielectric strength can be increased by incorporation of nano‐sized fillers in an epoxy matrix .…”

Section: Introductionmentioning

confidence: 99%

Role of silica nanoparticle in multi‐component epoxy composites for electrical insulation with high thermal conductivity

Lee

Park

2017

J Am Ceram Soc

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Multicomponent epoxy micro/nano‐composites containing micro‐alumina, micro‐quartz, and nano‐silica were fabricated to develop electrical insulation materials with high thermal conductivity. Simply changing the ratio between the alumina and quartz microparticles caused a trade‐off relationship between the thermal conductivity and electrical insulation. Increasing the alumina content in the epoxy‐alumina/quartz micro‐composites enhanced the thermal conductivity but deteriorated the dielectric strength. An increase in the thermal conductivity without incurring a loss in the dielectric strength was achieved by incorporating silica nanoparticles in the epoxy micro‐composites. Adding silica nanoparticles to the epoxy micro‐composites was found to be more efficient in improving the thermal conductivity compared to increasing the alumina ratio, especially at low alumina/quartz ratios. This behavior corresponded to theoretical models. Therefore, we provide a useful insight, both practical and theoretical, into the more advanced optimization of designing multicomponent epoxy composites for electrical insulation with high thermal conductivity.

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The Effect of Nanoparticles Percentage on Mechanical Behavior of Silica-Epoxy Nanocomposites

Cited by 85 publications

References 68 publications

The synthesis, modification, and application of nanosilica in polymethyl methacrylate denture base

The synthesis, modification, and application of nanosilica in polymethyl methacrylate denture base

Synergistic Effects of Mixed Silica Micro-nanoparticles on Compressive Dynamic Stiffness and Damping of Epoxy Adhesive

Role of silica nanoparticle in multi‐component epoxy composites for electrical insulation with high thermal conductivity

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