Nanoparticles with various surface modifications as functionalized cross-linking agents for composite resin materials

In this article, sheet boehmite (AlOOH), which was synthesized via a facile and environmental friendly method, was used as reinforcing agent to toughen Bisphenol A epoxy resin. The result of X-ray Diffraction (XRD) and IR spectrum indicated that the as-synthesized product was pure crystalline and high purity AlOOH. The effects of sheet AlOOH on the mechanical properties of AlOOH/epoxy nanocomposites were investigated. The results indicated that the introduction of AlOOH significantly improved the mechanical properties of epoxy resin. Compared with neat epoxy resin, the tensile strength and the fracture toughness (K IC ) of the AlOOH/epoxy nanocomposites filled with 4 wt % AlOOH increased by 24.2% and 28.7%, respectively, while the flexural strength increased from 40.92 to 50.00 MPa. From Scanning Electron Microscope (SEM), a phase-separated morphology and plenty of cervices and river branches were observed in the fractured surfaces of composites. With the increase of sheet AlOOH content, river-shaped cracks became more and more intensive. Overall, the addition of sheet AlOOH is shown as a promising method for mechanical properties enhancement of epoxy matrix.

Section: Resultsmentioning

confidence: 99%

Mechanical properties of epoxy resins reinforced with synthetic boehmite (AlOOH) nanosheets

Zhuo

Sun

et al. 2014

“…Unlike carboxylic, the sulfonic acid more likely reacts with acid–base interaction, resulting in less stable ionic bonds, though structures, similar to those in Figure (b) (monodentate), are also proposed. Although surface modification is generally performed on previously synthetized particles, there is a chance to incorporate surface modification into the preparation step .…”

Section: The Structure and Properties Of Bamentioning

confidence: 94%

“…Surface treatment seems to be a necessary step in the incorporation of BA in polymers via melt compounding. BA is often modified by derivatives of carboxylic and sulfonic acids . BA forms a mono‐ or bidentate structure with carboxylic acid.…”

Section: The Structure and Properties Of Bamentioning

confidence: 99%

See 1 more Smart Citation

Polymer/boehmite nanocomposites: A review

Karger‐Kocsis

Lendvai

2017

Boehmite is an aluminum oxyhydroxide [AlO(OH)] which is preferentially used as precursor for the production of (transition) aluminum oxides. Boehmite alumina (BA) nanoparticles are available in various morphologies due to versatile synthesis routes, which are briefly introduced. The peripheral hydroxyl groups of BA offer manifold functionalization possibilities for tailoring the dispersion and filler/matrix adhesion properties. The incorporation of BA nanofillers, with and without surface treatments, may yield improved mechanical and novel functional properties in polymers. BA can be introduced in polymers and polymer composites through different methods. This comprehensive overview covers the basic results reported on polymer/BA nanocomposites in the open literature. In this review, polymer matrices are grouped into thermoplastics, thermosets, and rubbers. Using literature results and our own findings, we have identified promising R&D trends with polymer/BA nanocomposites. V C 2017 Wiley Periodicals, Inc. J.Appl. Polym. Sci. 2018, 135, 45573.

“…These goals could be achieved by an adequate surface modification of the particles. It is well‐known that by this modification the viscosity of the liquid nanocomposite as well as the interfacial strength between particle and resin can be tailored …”

Section: Resultsmentioning

confidence: 99%

Impact of nanoparticles on the process‐induced distortions of carbon fiber reinforced plastics: An experimental and simulative approach

Exner

Hein

Mahrholz

et al. 2018

This article investigates the potential of aluminum oxide nanoparticles for the reduction of process-induced distortions of carbon fiber reinforced plastics (CFRP). Therefore the matrix properties, which affect the distortions, are experimentally and mechanistically analyzed in detail at various particle contents. The results clearly show an increasing impact of raised particle content on gelation, chemical and thermal shrinkage, on Young's modulus, as well as on Poisson's ratio. These alterations can be successfully transferred to reduce spring-in of L-shaped CFRP brackets, which are manufactured by infusion technology. However, it is found that particle contents higher than 5 wt % are needed to influence these parameters. For further understanding of the parameters controlling spring-in, a numerical sensitivity analysis is performed by the correlation of various matrix parameters and the induced distortions. The results from a structural simulation reveal that changes in thermal and chemical shrinkage as well as in gelation have a major impact on the distortions, but the modes of action of the particles also have to be taken into consideration. These mechanistical insights about nanoparticle impacts might be a valuable approach to lower or overcome distortions in composite materials in the future.