Spheroidal Nanoparticles in Epoxide‐Based Adhesives

Abstract

Epoxy resins are a very important class of structural adhesives and property improvements are constantly being sought. As the interaction between the polymer and the surface of nanoparticles is nothing other than adhesion, there is obvious scope for property improvements by adding nanoparticles having tailored surfaces. Particles agglomeration, surface chemistry, and the thickness and composition of the particle‐polymer interphase are crucial for the resulting material properties. Also, the simultaneous use of different nanoparticles can lead to marked property improvements. Specific nanoparticles lead to new functions. This is demonstrated for “antenna particles” for rapid‐curing adhesives.magnified image

Hotmelts with improved properties by integration of carbon nanotubes

“…[1] To influence other important properties such as cohesive strength, viscosity and softening temperature further modifications to the adhesive are often necessary. [2] . Recent studies have considered the effects of inorganic fillers on the properties of adhesives.…”

“…Inserting carbon nanotubes into adhesives has thereby improved mechanical and electrical properties of the adhesives. [2,10,11,22,27,28] The aim of this study was the enhancement of the properties of a commercially used …”

Inspiration from the natural world: from bio-adhesives to bio-inspired adhesives

“…The involvement of a curing process during attachment indicates that a chemical interaction between the nanoparticles and the adhesive is most likely responsible for generating the high strength of this adhesive. The addition of nanoparticles to polymer epoxies and adhesives has previously been shown to increase the adhesion strength of adhesives, only when the nanoparticles interact with the polymer matrix [110][111][112][113][114][115]. In cases where the nanoparticles do not react with the polymer they may still increase the mechanical properties of the polymers by serving as fillers within the matrix, but do not increase adhesion strength [116,117].…”

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

“…[14,15] There are not much scientific researches that analyze the viability for the use of nano-reinforced polymers as adhesives. Most of the publications about nano-reinforced adhesives focus on the reinforcement of epoxy adhesives [16][17][18] and they revealed that the addition of small amounts of nanoparticles to epoxy adhesives can improve the mechanical resistance of structural joints. [2,19,20] The enhancement of the mechanical performance of the epoxy adhesives can directly be related to the improved shear strength of nano-reinforced joints.…”