Epoxy nanocomposites with high mechanical and tribological performance

Wetzel, Bernd; Haupert, F.; Zhang, Ming Qiu

doi:10.1016/s0266-3538(03)00115-5

Cited by 717 publications

(373 citation statements)

References 24 publications

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“…Regarding their physical properties, most interest is focused on the mechanical performances (e.g., Wetzel et al 2003;Kinloch et al 2006Kinloch et al , 2008Johnsen et al 2007;Dudkin et al 2008). A systematic improvement of their mechanical properties requires a deeper understanding of the elastic, viscoelastic, and flow behaviors of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Strain-induced low-frequency relaxation in colloidal DGEBA/SiO2 suspensions

et al. 2014

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Diglycidyl ether of bisphenol A (DGEBA) is widely exploited as an epoxy resin in adhesives and coatings. In this paper, it is used as an oligomer matrix for silicafilled nanocomposites. Rheological measurements show that the pure matrix obeys power-law relaxation dynamics in the vicinity of the dynamic glass transition of this lowmolecular-weight glass former. In the filled systems, a lowfrequency relaxation appears additionally to the structural α-process of the matrix. Considering the nanocomposites as Newtonian hard-sphere suspensions at low angular frequencies (or high temperatures), the modified terminal regime behavior of the matrix can be linked to strain-induced perturbations of the isotropic filler distributions. While in the low-frequency regime hydrodynamic stresses relax instantaneously, the Brownian stress relaxation is viscoelastic and can be evidenced by dynamic rheological measurements. At higher angular frequencies, the α-process of the matrix superimposes on the Brownian stress relaxation. In particular, we were able to depict the low-frequency anomaly for concentrated, semi-dilute, and even for dilute suspensions.

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Section: Introductionmentioning

confidence: 99%

Strain-induced low-frequency relaxation in colloidal DGEBA/SiO2 suspensions

et al. 2014

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“…But, if the T g of the interface is higher than that of the matrix, the T g of composite will increase by increasing filler content [18]. Synergistic effects were found in the form of a further increase in wear resistance, stiffness, fracture toughness and tensile and impact strengths by mixing nano and microparticles [19][20][21]. Processing methods producing controlled particle size distribution, dispersion, and interfacial interactions would be advisable to obtain customized properties in new composites.…”

Section: Introductionmentioning

confidence: 99%

Controversial effects of fumed silica on the curing and thermomechanical properties of epoxy composites

Tarrío-Saavedra

López-Beceiro²,

Naya³

et al. 2010

Express Polym. Lett.

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Abstract. The effect of fumed silica on the curing of a trimethylolpropane epoxy resin was investigated by thermal analysis methods like Differential Scanning Calorimetry (DSC), and Dynamic Mechanical Analysis (DMA). The fumed silica used here is a by-product of the silicon and ferrosilicon industry, consisting of micro and nanosized particles. Both the curing reaction and the properties of the obtained composites were affected by the filler content. Different trends were observed for filler contents above and below the 30 wt%. Up to 30 wt%, the behaviour can be explained as a predominantly agglomeration effect. For 30 wt% and higher filler contents, single particles seem to play a more important role.

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“…Recent investigations on inorganic nanoparticles filled polymers demonstrate their significant potential in producing composites with low friction and high wear resistance [1][2][3][4][5]. Compared with the composites incorporated with micro-particles, which are characterized by severe wear resulting from abrasion and particles pull-out, nanocomposites exhibit rather mild wear with fine individual debris acting as lubricant and contributing to material removal by polishing.…”

Section: Introductionmentioning

confidence: 99%

Effect of nano-Si3N4 surface treatment on the tribological performance of epoxy composite

Luo

Yu²,

Dong³

et al. 2010

Express Polym. Lett.

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Abstract.To overcome the disadvantages generated by the loose nano-partilce agglomerates dispersed in polymer composites, a chemical grafting method was applied to modify nano-Si3N4 by covalently bonding glycidyl methacrylate (GMA) onto the particles. The tribological behavior of the epoxy composite filled with nano-Si3N4 or GMA treated Si3N4 (Si3N4-g-PGMA) was studied using a ring-on-block wear tester under dry sliding, and the worn surface of the filled epoxy composite and the surface roughness of the composites after the sliding wear test were investigated by SEM (scanning electron microscopy) and AFM (atomic force microscopy), respectively. In comparison to the composites filled with untreated nano-Si3N4 particles, the composites with the grafted nano-Si3N4 exhibit improved sliding wear resistance and reduced friction coefficient owing to the chemical bonding at the filler/matrix interface.

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Epoxy nanocomposites with high mechanical and tribological performance

Cited by 717 publications

References 24 publications

Strain-induced low-frequency relaxation in colloidal DGEBA/SiO2 suspensions

Strain-induced low-frequency relaxation in colloidal DGEBA/SiO2 suspensions

Controversial effects of fumed silica on the curing and thermomechanical properties of epoxy composites

Effect of nano-Si3N4 surface treatment on the tribological performance of epoxy composite

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