Preparation and properties evaluation of nitrile rubber nanocomposites reinforced with organo-clay, CaCO3, and SiO2 nanofillers

Sadeghalvaad, Mehran; Dabiri, Erfan; Zahmatkesh, Sara; Afsharimoghadam, Pooneh

doi:10.1007/s00289-018-2583-8

Cited by 27 publications

(8 citation statements)

References 32 publications

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“…Tying the fibrous particles of soap with each other will make the structure of the grease more concentrated [8]. Nanotechnology plays a prominent role in different applications [9][10][11][12][13][14][15]. Recently, the use of NPs, as additives for enhancing the lubrication and conduction of the base grease has attracted many attentions.…”

Section: Introductionmentioning

confidence: 99%

Lithium lubricating greases containing carbon base nano-additives: preparation and comprehensive properties evaluation

2019

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The aim of this research is to investigate the enhancement of lubricating and sealant properties, increase of the life time, and reduce of wear traces for lubricants and sealant greases. For this purpose, carbon dot (C-dot) nanoparticles (NPs) were synthesized successfully to add to the lithium based grease in 0.1, 0.2, 0.4, 0.6, 0.8 and 1 wt%. To better understand the effect of NPs on the properties of lithium based grease, carbon nanofiber (CNF) and Nano-Fullerene (C60) were also used in the mentioned weight percentages to add to the lithium based. NPs were well dispersed in the phase of base grease by the use of ultra-sonication. Variety of tests were done on the lithium base grease and all of the fabricated nanogreases and their results were then compared with each other. Using NPs did not remain any corrosive tracks for all of the nano-greases and caused the improvement in all their properties. Prepared nanogreases were also resistant to fuel, water, and aqueous alcohol in a specific period of time. CNFs with weight percentages in the range of 0.4-0.8 showed to be the optimum NPs content to be added to the lithium based grease in terms of improved properties.

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Section: Introductionmentioning

confidence: 99%

Lithium lubricating greases containing carbon base nano-additives: preparation and comprehensive properties evaluation

2019

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“…As NBR is allowed to age under ambient conditions, the escape of volatile additives does not occur, which leads to an increase in the peak intensity at 1416 cm −1 . The peak at 961 cm −1 in the aged sample increased due to an increase in the double bond of the hydrocarbon group, leading to an increase in the elastic nature of the material [33][34][35].…”

Section: Ftirmentioning

confidence: 99%

“…Polymer degradation and durability can be characterized by activation energy. In this study, the activation energy was calculated using model-free methods, such as the Ozawa-Flynn-Wall (OFL), Kissinger, and Kissinger-Akahira-Sunose (KAS) methods [28,29,33,34], by plotting the logarithmic heat rate versus the reciprocal of the constant decomposition temperature. The slopes of the natural logarithm of conversion rate versus reciprocal of absolute temperature plots were fitted to be linear (figures 6-11), and the activation energy was calculated from equations (11) and (14).…”

Section: Activation Energymentioning

confidence: 99%

Thermal degradation of naturally aged NBR with time and temperature

Ammineni

Nagaraju

Dumpala

2022

Mater. Res. Express

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Nitrile butadiene rubber (NBR) is a polymer widely used in pipe fittings as a sealing and damping element. The performance of the polymer materials degrades with time and temperature. The present work emphasizes the thermal degradation of NBR materials using thermogravimetric analysis (TGA) at heating rates of 5, 10, 15, and 20 °C min−1 in a controlled nitrogen environment. Model-free methods, namely the Kissenger, Kissinger-Akahira-Sunose (KAS), and Ozawa-Flynn-Wall (OFL) approaches, are used to determine the kinetic activation energy and frequency factor. The obtained values were used to calculate the lifetime of virgin NBR and the remaining life of naturally aged NBR. Fourier-transform infrared spectroscopy (FTIR) was used to detect changes in the functional groups of the NBR material with age. From the experimental data, it is concluded that virgin NBR has better thermal stability than naturally aged NBR. Furthermore, the activation energy of NBR is temperature-dependent, and oxidative aging has a significant impact on the degradation of kinetic parameters. At lower conversion rates, the activation energy of virgin NBR (79.39 kJ mol−1) and aged NBR (78.25 kJ mol−1) are almost the same, while at increased conversion rates, virgin NBR (529.77 kJ mol)−1 has higher activation energy than aged NBR (280.15 kJ mol−1).

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“…Calcium carbonate (CaCO 3 ) is one of the world’s most abundant inorganic materials [ 1 ], and it is cheap and has wide industrial applications [ 2 , 3 , 4 ], especially in the field of inorganic fine powder fillers [ 5 , 6 , 7 ]. A large amount of high-quality white marble mine resources are present in the Hezhou Region of Guangxi Province in China, and these resources are the largest in the South China Region with prospective reserves of as much as 2.6 billion cubic meters [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of CaCO3/Al(OH)3 Composites via Heterogeneous Nucleation

Wang

Ding

et al. 2023

Materials

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As one of the most widely used inorganic fine powder fillers, calcium carbonate is cheap. However, considering its poor light transmittance, it is not suitable to be added to resin matrix composites that require high light transmittance. Aluminum hydroxide has good light transmission and flame retardancy, but it is more expensive than calcium carbonate. CaCO3/Al(OH)3 composites with a core-shell structure that showed a trend toward the performance of aluminum hydroxide not only improved the surface properties of CaCO3, but also increased the added value of CaCO3. In the present paper, CaCO3/Al(OH)3 composites were successfully prepared in sodium aluminate solution via heterogeneous nucleation. Four types of calcium sources, including calcite-type precipitated calcium carbonate, vaterite-type precipitated calcium carbonate, ground calcium carbonate with two different particle sizes as the precursors and supersaturated sodium aluminate solution as the substrate, have been deeply investigated in terms of their influence on the preparation of CaCO3/Al(OH)3 composites. Results showed that the calcium carbonate precursor greatly affected the formation of CaCO3/Al(OH)3 composites. Both the precipitated calcium carbonate and the small particle ground calcium carbonate are likely to undergo anti-causticization and a complexation reaction with it to generate 3CaO·Al2O3·6H2O and 3CaO·Al2O3·CaCO3·11H2O, which go against the coating of calcium carbonate with aluminum hydroxide. Within the experimental range, the use of ground calcium carbonate with a particle size of 400–500 mesh is more suitable as a precursor for the preparation of core-shell CaCO3/Al(OH)3 composites.

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Preparation and properties evaluation of nitrile rubber nanocomposites reinforced with organo-clay, CaCO3, and SiO2 nanofillers

Cited by 27 publications

References 32 publications

Lithium lubricating greases containing carbon base nano-additives: preparation and comprehensive properties evaluation

Lithium lubricating greases containing carbon base nano-additives: preparation and comprehensive properties evaluation

Thermal degradation of naturally aged NBR with time and temperature

Preparation of CaCO3/Al(OH)3 Composites via Heterogeneous Nucleation

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