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With the development of the recycling economy for waste rubber, the highvalue application of rubber powder, such as the modifier in asphalt mixture and the polyurethane foam, has attracted more and more attention. In the study, the surface characteristics of rubber powder modified by deep eutectic solvents were investigated by infrared spectroscopy, sol fraction, solid surface energy, and scanning electron microscope. The mechanical properties of modified ground tire rubber powder (M-GTR)/SBR/silica composites were studied. Meanwhile, the viscoelasticity of the composites was characterized by the Payne effect and Mullins effect. Compared with the unmodified rubber powder, the rubber powder treated at 105[degrees]C had a higher sol fraction and maximum value of solid surface energy. With the increase of the content of M-GTR, the Payne effect of the M-GTR/SBR/silica composites firstly weakened and then increased. As for the Mullins effect, the vulcanizates showed stresssoftening phenomenon in the process of uniaxial cyclic compression. The recovery ability of the Mullins effect strongly depended on temperature. Besides, the modified rubber powder could improve the dispersity of silica in the SBR matrix, and the Mullins effect of the composite contained modified rubber powder was weak, which would provide potential high-value application for rubber powder. KEYWORDS deep eutectic solvents, dispersity, ground tire rubber powder, interaction, modified, viscoelasticity, 1 | INTRODUCTION With the development of the social economy, the demand for rubber products rises from year to year, resulting in more and more waste rubber. But, due to [...]

This study investigates and predicts the tribological properties of an imidazolium ionic liquid modified graphene oxide (ILGO) with silicone rubber (QM) composite. The pin on the disc tribometer was utilized to conduct experimental tribological property analysis, with load, sliding velocity, and temperature as changing parameters. Coefficient of friction (COF) of QMILG01.5 was 42% lower than that of pure QM. Study found that ionic liquid serves as a self-lubricating layer for graphene, establishing a solid graphene-to-ionic liquid interface bond with the rubber matrix. The experimental data were utilized for training artificial neural networks (ANNs), which were then used to predict the COF of the nanocomposites for values for which the experiment was not performed. The produced composite's predictions of friction coefficient utilizing the ANN technique were quite close to experimental results. The work's fundamental goal is to buy experimentation verifies the COF of functionalized graphene oxide (ILGO) with silicone rubber composite, use the actual experimental values to train a deep neural network using Multilayer perceptron, and then use the trained network to predict the values of COF for which obtaining the values by experimentation was difficult. KEYWORDS graphene oxide, ionic liquids, multilayer perceptron, silicone rubber, tribology, 1 | INTRODUCTION Silicone rubber (QM) is a synthetic elastomer with a solid silicone-oxygen chemical structure that contributes to its excellent properties, high chemical and thermal stability, and biocompatibility. [1] [...]

Endowing waterborne polyurethane (WPU) materials with mechanically reinforced and self-healing property is a pressing issue for expanding practical applications. In this article, we proposed a simple method to give WPU with self-healing properties while improving the mechanical properties. First, furfuryl-modified silica nanoparticles (furan@Si[O.sub.2]) with high functionality and excellent dispersibility were prepared by the sol-gel method. Furan@Si[O.sub.2] was then introduced into the side-hanging maleimide WPU to form a thermally reversible inorganic-organic network (WMSPUS-x) based on the Diels-Alder reaction. The morphologies and properties of furan@Si[O.sub.2] and WMSPUS-x emulsions were analyzed by TEM and DLS, demonstrating the excellent dispersion of furan@Si[O.sub.2] and the storage stability of emulsions. The cross-linking density of the nanocomposites was varied by the furan@Si[O.sub.2] contents, and the effects of cross-linking density on mechanical and selfhealing properties were systematically investigated. In addition, the thermal stability of WMSPUS-x nanocomposites was significantly improved shown by TGA results. Finally, qualitative and quantitative studies of the self-healing process were carried out to verify that WMSPUS-x nanocomposites possess great self-healing capacity. The outcomes indicate that WMSPUS-x nanocomposites have great potential for application as a smart material. KEYWORDS inorganic organic hybrid material, mechanical property, nanocomposites, self-healing, waterborne polyurethane, 1 | INTRODUCTION Waterborne polyurethane (WPU) is a novel polymer material with excellent performance and meets environmental requirements, as no volatile organic compounds (VOCs) are released during the practical application. [...]