Catalyst free self-healable vitrimer/graphene oxide nanocomposites

Disulfide exchange assisted self-healing epoxy/PDMS/graphene oxide nanocomposites

“…34 Among these reactions, disulde exchanges were prominently discussed in self-healing studies to realize effective properties. 35,36 In the present study, catalyst-free disulde exchangepromoted epoxy/PDMS/GO nanocomposite vitrimer materials with self-healing behavior are reported. The addition of catalyst not only causes toxicity but the mixing challenge also compromises the mechanical properties of the synthesized vitrimers.…”

Vitrimers: directing chemical reactivity to control material properties

“…As materials, part of the excitement for the developments in the area of vitrimers is also driven by the fact that they also hold promise as thermoset substitutes for the development of weldable, recyclable and reshapable composites. 76 Therefore, the development of vitrimer (nano)composites have attracted considerable interest in the past few years, as demonstrated by the numerous varieties of already implemented reinforcing agents, such as glass and carbon bers, 77-81 silica and aluminabased llers, [82][83][84][85][86][87][88][89] carbon dots and nanotubes, [90][91][92][93][94][95] graphene, [96][97][98][99] cellulose, 100 nanocrystals, 101 etc. 102 The most frequently reported systems used in this context are based on the original trans-esterication vitrimer chemistry, because of the widespread commercially available hydroxy-functionalized llers.…”

The Impact of Vitrimers on the Industry of the Future: Chemistry, Properties and Sustainable Forward-Looking Applications

“…As a consequence of this, self-healing and shape memory properties are more favourable than in unfilled matrices. This effect, together with the improved flexural strength and modulus (+7.1% and +9.4% for 1 wt% GO, respectively), contributes to the attractiveness of the formulation [110].…”

“…When the filler comes in the form of small solid particles with dimensions below 100 nm, these materials are referred to as nanocomposites. Krishnakumar et al used Graphene Oxide (GO) nanofillers in an epoxy vitrimer that underwent network rearrangement by disulfide exchange [110]. Intriguingly, a higher GO content generates additional free volume, thus lowering T g and enhancing chain mobility.…”