Improved mechanical and dielectric performances of epoxy nanocomposites filled with aminated polyethylene glycol grafted graphene

High‐performance epoxy nanocomposites via constructing rigid structured interphase with epoxy‐rich graphene oxide

“…A comparison of the reinforcing effects of f‐GO in this work with those in previous studies was made on the basis of relative increments of mechanical properties. [ 25,27,31,42–47 ] As shown in Table 2, the selected epoxy nanocomposites modified by different functionalized GO fillers exhibited improvements in term of mechanical properties more or less, indicating that GO or its derivatives was able to reinforce epoxy resin. It can be seen from the Table 2 that the present DHG‐GO/TDE‐85 nanocomposites exhibited a good balance of mechanical properties at an extremely low content of DHG‐GO nanosheets, implying an excellent processability and highly reinforcing efficiency.…”

Efficient reinforcement of epoxy resin with amine‐rich rigid short‐chain grafted graphene oxide

“…The tensile strength and elongation at break in our work were compared with other reported epoxy composite materials containing GO in Table 2. [10,[37][38][39][40] It can be seen from the table that the prepared DHG-GO/ epoxy composites exhibited excellent mechanical properties at a very low addition of modified GO.…”

“…It can be seen from Figure 9 that the epoxy nanocomposites with HN-GO had a slightly lower T g than pure EP, while the T g of the epoxy nanocomposites with DHN-GO showed the opposite trend overall. This was because the dispersibility of HN-GO in EP is not as good as DHN-GO, which made the polymer segments move more easily, leading to a slight decrease in the glass Gain in σ t (%) Gain in ε t (%) Reference PVI-g-GO 2.5 60 24 [37] bwGO 2 4 2 [38] GPTS-GO 2 14 89 [38] PA-GO 10 12 4 [39] APTS-GO 2 16 82 [38] PEEK-g-GO 5 7 12 [10] PEG-GO 10 20 - [40] DHG-GO 0.75 28 37 In this work transition temperature of the composite material. DHN-GO showed a better dispersion state in the matrix, which increased the mechanical interlocking effect of filler and epoxy segments.…”

Polysulfide polyurethane–urea-based dielectric composites with CeO2-loaded MXene exhibiting high self-healing efficiency

“…Based on the percolation theory, 14 it can be demonstrated that conductive fillers such as graphene, 15 carbon nanotubes, 16 and polyaniline 17 can be added to polymers to elevate the dielectric constant and only a small amount is required, compensating for the lack of ceramic fillers. Liang 18 utilized epoxy-based dielectric composites using graphene nanosheets modified with aminated polyethylene glycol enabling the composites to achieve a permittivity of 84.3 at 100 Hz and a dielectric loss of 0.21 with 1.5 vol% filler content.…”