Investigation of the Compatibility and Damping Performance of Graphene Oxide Grafted Antioxidant/Nitrile-Butadiene Rubber Composite: Insights from Experiment and Molecular Simulation

Abstract

Rubber damping materials are widely used in electronics, electrical and other fields because of their unique viscoelasticity. How to prepare high-damping materials and prevent small molecule migration has attracted much attention. Antioxidant 4010NA was successfully grafted onto graphene oxide (GO) to prepare an anti-migration antioxidant (GO-4010NA). A combined molecular dynamics (MD) simulation and experimental study is presented to investigate the effects of small molecules 4010NA, GO, and GO-4010NA on the compatibility and damping properties of nitrile-butadiene rubber (NBR) composites. Differential scanning calorimetry (DSC) results showed that both 4010NA and GO-4010NA had good compatibility with the NBR matrix, and the Tg of GO-4010NA/NBR composite was improved. Dynamic mechanical analysis (DMA) data showed that the addition of GO-4010NA increased the damping performance of NBR than that of the addition of 4010NA. Molecular dynamics (MD) simulation results show GO-4010NA/NBR composites have the smallest free volume fraction (FFV) and the largest binding energy. GO-4010NA has a strong interaction with NBR due to the forming of hydrogen bonds (H-bonds). Grafting 4010NA onto GO not only inhibits the migration of 4010NA but also improves the damping property of NBR matrixes. This study provides new insights into GO grafted small molecules and the design of high-damping composites.

Effect of Four Groups of GO-CF/EP Composites with Ideal Infiltration Structure and Different Layering Ways on Damping Properties

“…The damping ratio of [XYXYXY] 6 is 1.187%, which is 5.3 times higher than that of the specimen without the Y-direction layer. This data conclusion is also consistent with the view in reference [19,33]. This is mainly because when the specimen is subjected to impact force, the energy dissipation path of the specimen is fixed, as shown by the arrow in Figure 10.…”

Ultra‐Damping Composites Enhanced by Yolk–Shell Piezoelectric Damping Mechanism

“…The damping properties of YS700/CNT/EP sample were compared with damping composites in previous literatures (Figure 1d). [7,10,13,17,[20][21][22][23][24][25][26][27][28][29] Furthermore, by introducing YS700 particles and CNT network into various resin matrix, the tan δ area values of composite samples rose >20%, as shown in Figure 1e and Figure S1 (Supporting Information). Results verify that the yolk-shell piezoelectric damping mechanism can effectively improve damping performance of resin, which may provide a unique paradigm for enhancement of damping property.…”

Research and Development of High-Performance High-Damping Rubber Materials for High-Damping Rubber Isolation Bearings: A Review

“…A better reinforcement effect of the graphene on the polar NBR matrix than the non-polar EPDM matrix was observed due to strong hydrogen bonds (H-bonds) formed between the graphene and the polar NBR matrix. Four types of H-bonds (type a, b, c, and d), as shown in Figure 34, are formed in the NBR composites when GO is added, which improves the damping property of rubber matrixes [96]. A type a H-bond (Figure 34) is formed between -CN groups of NBR molecular chains and -NH-groups of small molecules 4010NA, which is an antioxidant grafted onto In [97], ENR/GO rubber nanocomposites using latex mixing method were prepared and the reinforcement effect of GO nanofillers on ENR was studied.…”

“…Mechanical properties of NBR, EPDM and their nanocomposites[95]. Four types of hydrogen bonds formed in NBR composites[96].…”