Toughening of Epoxy Adhesives by Nanoparticles

Buchman, A.; Dodiuk‐Kenig, H.; Dotan, A.; Tenne, Reshef; Kenig, S.

doi:10.1163/156856108x379209

Cited by 64 publications

(44 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1,2,23,24 However, changes in the manufacturing process with time or unintentional variation from batch to batch cannot be excluded. According to the manufacturer, this powder was produced by high-temperature solid-gas synthesis, the primary particles had diameters of 50 to 150 nm and they consisted of 10-100 WS 2 layers, with an interlayer spacing of 0.62 nm.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS₂ nanoparticles

Haba

Barbezat

Ayalur-Karunakaran

et al. 2016

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

This work deals with the toughening effect of flaky WS 2 and fullerene-like WS 2 (IF-WS 2 ) nanoparticles on epoxy with varying network properties. Reducing the amount of curing agent resulted in decreased crosslink density as measured by dynamic-mechanic analysis and double-quantum nuclear magnetic resonance spectroscopy. Although that lead to moderate changes in the epoxy's tensile properties, its fracture toughness dropped drastically, probably due to an increased defect fraction. IF-WS 2 could be dispersed significantly more effectively within epoxy resin than flaky WS 2 , possibly due to its spherical shape, but caused less toughening. IF-WS 2 tended to debond from the epoxy, while flaky WS 2 introduced more secondary cracks. Both increased the fracture toughness of the (brittle) substoichiometric, but not that of the (tough) stoichiometric epoxy, possibly due to their interaction with molecular defects. Irrespective of which mechanism resulted in the toughening effect, its effectiveness depended strongly on the epoxy matrix.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The SEM (NovaNanoSEM 230 from FEI) had a Schottky fieldemission electron source operating at a voltage of 3 kV (beam current 220 pA), imaging secondary electrons with an in-lens detector at roughly 3310 24 Pa pressure. All images were taken from regions close to the precrack.…”

mentioning

confidence: 99%

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS₂ nanoparticles

Haba

Barbezat

Ayalur-Karunakaran

et al. 2016

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

show abstract

“…The lighter weight and higher Young's modulus, combined with the low friction and wear properties of IF-MoS 2 could provide advantage for variety of applications. For example, recent reports indicate that addition of small amounts of IF-WS 2 nanoparticles to variety of polymers [13,14] and epoxy resins [15] leads to significant improvements in their modulus and strength. Since the density of MoS 2 is some 50% smaller than that of WS 2 and its modulus is 40% higher, it could be anticipated that IF-MoS 2 -based nanocomposites would in fact be superior additive to that of IF-WS 2 .…”

Section: Introductionmentioning

confidence: 99%

Fullerene-like MoS2 Nanoparticles and Their Tribological Behavior

Rosentsveig

Gorodnev²,

Feuerstein³

et al. 2009

Tribol Lett

Self Cite

169

109

View full text Add to dashboard Cite

Using a new quartz-made reactor, large amounts of fullerene-like (IF) MoS 2 nanoparticles were synthesized by reacting MoO 3 vapor with H 2 S in a reducing atmosphere. The nanoparticles were found to be of high crystalline order; with an average size of 70 nm and consist of more than 30 closed shells. Extensive tribological testing of the nanoparticles in two types of synthetic oils-poly-alpha olefins (PAO)-was carried out and compared to that of bulk (2H platelets) MoS 2 and IF-WS 2 . These tests indicated that under high pressure and relatively low humidity, the IF-MoS 2 exhibited a friction coefficient as low as 0.03 and the smallest wear rate of the measured systems. However, its performance was found to be lower in comparison to IF-WS 2 after 2500 cycles, due probably to its inferior chemical stability. This study indicates that the tribological performance of the IF nanoparticles depends strongly on their crystalline order and size.

show abstract

“…the adhesives are usually much weaker than the adherents they joint. Several approaches, such as the addition of thermoplastic compounds [3,4] or inorganic particles, [5][6][7][8][9] have been proposed to enhance the mechanical properties of structural adhesives. Over the past decades, the introduction of nanoparticles opened an opportunity for polymer industries to improve the properties of polymers beyond the limits reachable by microparticle additions.…”

Section: Introductionmentioning

confidence: 99%

Adhesive strength of steel–epoxy composite joints bonded with structural acrylic adhesives filled with silica nanoparticles

Tutunchi

Kamali

Kianvash

2014

Journal of Adhesion Science and Technology

View full text Add to dashboard Cite

This paper reports a study on the effect of silica nanoparticles on the adhesion strength of steel-glass/epoxy composite joints bonded with two-part structural acrylic adhesives. The introduction of nano-silica in the two-part acrylic adhesive led to a remarkable enhancement in the shear and tensile strength of the composite joints. The shear and tensile strengths of the adhesive joints increased with addition of the filler content up to 1.5 wt%, after which decreased with addition of more filler content. Also, addition of nanoparticles caused a reduction in the peel strength of the joints. Differential scanning calorimeter analysis revealed that T g values of the adhesives rose with increasing the nanofiller content. The equilibrium water contact angle was decreased for adhesives containing nanoparticles. Scanning electron microscope micrographs revealed that addition of nanoparticles altered the fracture morphology from smooth to rough fracture surfaces.

show abstract

Toughening of Epoxy Adhesives by Nanoparticles

Cited by 64 publications

References 9 publications

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS₂ nanoparticles

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS₂ nanoparticles

Fullerene-like MoS2 Nanoparticles and Their Tribological Behavior

Adhesive strength of steel–epoxy composite joints bonded with structural acrylic adhesives filled with silica nanoparticles

Contact Info

Product

Resources

About

Toughening of Epoxy Adhesives by Nanoparticles

Cited by 64 publications

References 9 publications

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS2 nanoparticles

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS2 nanoparticles

Fullerene-like MoS2 Nanoparticles and Their Tribological Behavior

Adhesive strength of steel–epoxy composite joints bonded with structural acrylic adhesives filled with silica nanoparticles

Contact Info

Product

Resources

About

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS₂ nanoparticles

Significance of epoxy network properties for the toughening effect of flaky and fullerene‐like WS₂ nanoparticles