Enhanced interfacial interactions of isocyanate‐grafted graphene oxide/nitrile‐butadiene rubber nanocomposites: mechanical and thermo‐physical properties

Abstract

4,4‐diphenylmethane diisocyanate‐modified graphene oxide (GO) was fabricated (GO‐NCO), and for the first time used to reinforce the nitrile‐butadiene rubber (NBR) by using latex compounding approach. The modification process was verified by employing the Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, X‐ray diffraction, and field‐emission transmission electron microscopy. The morphologies of the fracture surfaces of the NBR and its nanocomposites were analyzed using high‐resolution scanning electron microscopy. The mechanical properties, dynamic rheological properties and the thermo‐physical properties of the NBR/GO‐NCO nanocomposites were compared and investigated. At same filler concentration, the NBR/GO‐NCO nanocomposites exhibited the superior performances than the NBR/GO nanocomposites did. The NBR/GO‐NCO exhibited the highest tensile strength of 8.3 MPa, which was almost 200% higher than that of the neat NBR composites. And the storage modulus continuously enhanced with the filler concentration attributing to the enhanced stiffness due to the GO‐NCO in the rubber matrix. POLYM. COMPOS., 40:E1103–E1110, 2019. © 2018 Society of Plastics Engineers

Characterization of Reduced and Surface-Modified Graphene Oxide in Poly(Ethylene-co-Butyl Acrylate) Composites for Electrical Applications

“…The mechanical properties of the rGO-based nanocomposites were assessed by tensile testing and compared to the neat EBA matrix (Figure 4). Young’s modulus was found to increase by 70%, 91%, and 102% for the 2%, 3%, and 4% nanocomposites by the mere addition of neat rGO to the matrix [16,17,18,19,20,21]. At the same time, the nanocomposites showed a significant decrease in tensile strain, from approximately 1400% to 400%, as a consequence of failure points related to the addition of 3-4% nanofiller and the appearance of nanofiller-clusters or even percolated networks.…”

Recent Advances in Organic Thermoelectric Materials: Principle Mechanisms and Emerging Carbon-Based Green Energy Materials

“…Carbon materials, such as graphene, CNT, nanodiamonds, carbon fiber, and fullerenes, have attracted great interest in recent years [93,94,95,96,97,98,99,100,101,102,103,104,105,106,107]. In the past decades, carbon materials, particularly CNT and graphene, have been widely employed in the fabrication of thermoelectric materials because of the following reasons: (1) carbon materials have an intrinsically high electrical conductivity, which can significantly enhance the thermoelectric efficiency of thermoelectric materials; (2) as novel carbon nanomaterials, their large specific surface areas can promote the formation of a highly efficient interface between the polymer matrix and the carbon particles [93,108,109,110,111,112,113,114]; (3) the high thermal conductivity of carbon materials can be alleviated by wrapping or coating the polymer matrix on their surfaces [115]; and (4) carbon-based thermoelectric polymer composites are flexible, low-cost, and non-toxic, in addition to having high mechanical strength and being light-weight. However, their thermoelectric performance is inferior to that of conventional inorganic thermoelectric materials.…”

Enhanced interfacial adhesion in glass fiber fabric/epoxy composites employing fiber surface treatment with aminosilane-functionalized graphene oxide

“…Herein, the D and G bands represent the defects originating from the oxidation reaction in the graphite sheets and vibration of sp 2 -hybridized carbon. 44,45 Therefore, this result indicates that GO sheets are indeed deposited on the fiber surface. In addition, the peak intensity ratio of the D and G bands ( I D / I G ) for GO−A−GFf and GO−A h −GFf is similar to that for GO−n−GFf (see Figure 1(b)).…”