Improving Fracture Toughness of Tetrafunctional Epoxy with Functionalized 2D Molybdenum Disulfide Nanosheets

Abstract

In this work, improved fracture toughness of tetra-functional epoxy polymer was obtained using two-dimensional (2H polytype) molybdenum disulfide (MoS2) nano-platelets as a filler. Simultaneous in-situ exfoliation and functionalization of MoS2 were achieved in the presence of cetyltrimethylammonium bromide (CTAB) via sonication. The aim was to improve the dispersion of MoS2 nanoplatelets in epoxy and enhance the interfacial interaction between nanoplatelets and epoxy matrix. Epoxy nanocomposites with CTAB functionalized MoS2 (f-MoS2) nanoplatelets, ranging in content from 0.1 wt% up to 1 wt%, were fabricated. Modified MoS2 improved the fracture properties (81%) of tetrafunctional epoxy nanocomposites. The flexural strength and compressive strength improved by 64% and 47%, respectively, with 0.25 wt% loading of f-MoS2 nanoplatelets compared to neat epoxy. The addition of f-MoS2 nanoplatelets enhanced the thermomechanical properties of epoxy. This work demonstrated the potential of organically modified MoS2 nanoplatelets for improving the fracture and thermal behavior of tetrafunctional epoxy nanocomposites.

Development of an Epoxy-Based Rapid Tool with Low Vulcanization Energy Consumption Channels for Liquid Silicone Rubber Injection Molding

“…Unfortunately, both the mechanical and physical properties of the LSR injection mold fabricated with Al-filled epoxy resins were not better than those fabricated from a conventional steel mold. Thus, enhancing both the mechanical and physical properties of an LSR injection mold by adding some different kinds of reinforcing fillers, such as carbon fibers [ 28 ], zirconia particles [ 29 ], silicon nitride particles [ 30 ], or molybdenum disulfide particles [ 31 ] in Al-filled epoxy resin is also an important research topic. The optimization of the mechanical and physical properties using the Taguchi method for an LSR injection mold could also be investigated [ 32 ].…”

Molybdenum disulfide polymeric nanoarchitectures and applications: A review

“…In a bid to enhance the tribologically affiliated features, EP nanoarchitectures were fabricated through reinforcement of varying ratios of silicon carbide (SiC) particulates with MoS 2 powder. 54 SiC with MoS 2 particulates surfaces were functionalized using silane crosslinking entity (KH560) to enhance distribution and eliminate aggregation of inorganic particulates within EP matrix. The influence of varying ratios of functionalized MoS 2 inclusion on the tribological features of SiC@EP nanoarchitectures was conducted, while the worn surface wearing mechanism, was studied at filler inclusion of 55 wt.%.…”

“…When the functionalized MoS 2 composition was 4 wt.%, the average frictional coefficient along with volume wear rate of functionalized MoS 2 @SiC@EP nanoarchitecture were 0.447 and 14.39 Â 10 À5 mm 3 /N m, respectively, minimizing by 10.06% and 52.13% when compared with those of 55 wt.% SiC@EP nanoarchitecture. 54 The scheme of the construction route of functionalized MoS 2 @SiC@EP nanoarchitectures was presented in Scheme 3. 54 Nanofillers quality of distribution within epoxy resin matrix influences the behavior of the EP nanoarchitectures.…”

“…54 The scheme of the construction route of functionalized MoS 2 @SiC@EP nanoarchitectures was presented in Scheme 3. 54 Nanofillers quality of distribution within epoxy resin matrix influences the behavior of the EP nanoarchitectures. Significantly, this influence will be most notable when the reinforcement is incorporated in an extended proportion.…”

“…53 S C H E M E 3 Schematic elucidation of functionalized MoS 2 @SiC@EP nanoarchitectures' fabrication steps. 54 From Figure 11, fracture SEM in synergy with EDS evaluation was utilized in studying the distribution of elevated-content functionalized SiC@MoS 2 within EP nanoarchitectures (Figure 11A-C). SEM and EDS analysis (Figure 11D-G) revealed that the functionalized MoS 2 with lamellar architecture was incorporated within the functionalized SiC@EP nanoarchitectures, with even dispersion and good distribution.…”