Dynamic Conductivity Research Articles

Thermal conductivity of h-BN monolayers using machine learning interatomic potential

Thermal management materials are of critical importance for engineering miniaturized electronic devices, where theoretical design of such materials demands the evaluation of thermal conductivities which are numerically expensive. In this work, we applied the recently developed machine learning interatomic potential (MLIP) to evaluate the thermal conductivity of hexagonal boron nitride monolayers. The MLIP is obtained using the Gaussian approximation potential method, and the resulting lattice dynamical properties and thermal conductivity are compared with those obtained from explicit frozen phonon calculations. It is observed that accurate thermal conductivity can be obtained based on MLIP constructed with about 30% representative configurations, and the high-order force constants provide a more reliable benchmark on the quality of MLIP than the harmonic approximation.

Сравнительное изучение кинетики свертывания крови и тромбообразования реологическими и электрореологическими методами.

Цель исследования: изучить механизмы формирования и тромбодинамические свойства кровяного сгустка при тромбообразовании in vitro и представить сравнительное исследование кинетики тромбообразования с помощью реологических и электрореологических методов в условиях постоянного и осциллирующего сдвигового вискозиметрического течения; оценить свертывание цельной и консервированной крови, ее вязкоупругие свой ства и влияние фибриногена и декстранов на формирование сгустка. Материалы и методы. Вязкость и удельную электропроводимость нормальной и консервированной с CPD-A1-адениновым раствором крови измеряли ротационным вискозиметром Low Shear 30 Contraves (LS30) с коаксиальными цилиндрами и копией измерительной системы MS1/1 со встроенными электродами (разработана на базе LS30) в условиях постоянного сдвигового потока и в электрическом поле. Вязкоупругие свойства нормальной цельной крови исследовали с помощью реометра Physica MCR 301 (Anton Paar, Austria) в условиях осциллирующего синусоидального потока. Результаты. Представлены результаты кинетики динамической вязкости и удельной электропроводимости консервированной крови в процессе коагуляции в условиях постоянного сдвигового потока и в электрическом поле. Исследованы вязкоупругие свойства цельной крови в условиях синусоидального осциллирующего вискозиметрического течения и представлены зависимости упругого модуля G' (storage modulus) и модуля потерь G'' (loss modulus), а также нормальных сил как функция времени при свертывании. Приводятся данные эффекта фибриногена и декстрана на упругий модуль G' и на модуль потерь G'' цельной крови в процессе коагуляции. Заключение. В условиях вискозиметрического течения при низких скоростях сдвига кинетика тромбообразования характеризуется начальным этапом постепенного увеличения кажущейся вязкости и уменьшения удельной электропроводимости крови и периодом интенсивной коагуляции, характеризирующимся экспоненциальным ростом вязкости и параллельным уменьшением удельной электропроводимости исследуемого образца. Установлено, что коагулирующая цельная кровь обладает нелинейными вязкоупругими свойствами. Кинетика образования сгустка в условиях осциллирующего вискозиметрического течения крови характеризуется увеличением упругого модуля G' и модуля потерь G'' со временем. Одновременно зарегистрирована и отрицательная нормальная сила исследуемого образца в зазоре между пластинами при постоянной толщине зазора. Повышение содержание фибриногена ускоряет коагуляцию и увеличивает значения упругого модуля G' и модуля потерь G'', а также и нормальной силы коагулирующей цельной крови. Objectives: to study the mechanisms of thrombus formation and thrombodynamic properties of a blood clot during coagulation in vitro and to present a comparative study of clot kinetics formation under conditions of steady and oscillating shear viscometric flow and at electric field by rheological and electrorheological methods; to evaluate the coagulation of whole and preserved blood, its viscoelastic properties and the effect of fi brinogen and dextrans on clot formation. Materials/ Methods. The viscosity and electrical conductivity of normal blood and blood preserved with CPD-A1-adenine solution were measured with a Low Shear 30 Contraves (LS30) rotational viscometer with coaxial cylinders and with a copy of the measuring system MS1 / 1 with builtin electrodes at a steady viscometric shear flow and in an electric field too. The viscoelastic properties of normal whole blood were investigated using a Physica MCR 301 rheometer (Anton Paar, Austria) at an oscillating sinusoidal flow. Results. Kinetics of the dynamic viscosity and electrical conductivity of preserved blood during coagulation at a steady shear flow and at electric field were obtained. The viscoelastic properties of whole blood were investigated under conditions of sinusoidal oscillating viscometric flow. The dependences of the elastic (storage) modulus G' and the loss modulus G'', as well as the normal coagulation forces as a function of time are presented. The effect of fibrinogen and dextran on the elastic modulus G' and the loss modulus G'' of whole blood during coagulation are presented. Conclusions. The kinetics of blood coagulation at low shear rates is characterized by a gradual increase of the apparent viscosity and a decrease in blood conductivity at the initial stage and an exponential increase in viscosity during intensive coagulation and a parallel decrease of conductivity too. It was established that coagulating whole blood exhibit nonlinear viscoelastic properties under conditions of sinusoidal blood flow. The kinetics of thrombus formation is characterized by increasing the elastic modulus G' (storage modulus) and the loss modulus G'' with time. The negative normal force in the gap between the plates is also registered at a constant thickness of the gap. An increase in fibrinogen content accelerates coagulation and increases the values of elastic modulus G' and loss modulus G', as well as of the normal force of coagulating whole blood.

Enhanced Terahertz Amplification Based on Photo-Excited Graphene-Dielectric Hybrid Metasurface.

Graphene under optical pump has been shown to be an attractive gain medium with negative dynamic conductivity at terahertz frequencies. However, the amplification over a monolayer graphene is very weak due to its one-atom thickness. In this paper, the proposed graphene-dielectric reflective metasurface effectively improved terahertz field localization and enhanced coherent amplification. The amplification coefficient of 35 was obtained at 3.38 THz at room temperature with an infrared pump intensity of 8 W/mm2. As pump intensity increased from 0 to 15 W/mm2, we observed a loss–gain–loss transition process, which was discussed in detail through coupled-mode theory. In addition, amplification at different frequencies was achieved by merely re-optimizing the geometric parameters of the dielectric resonators. This study offers an effective solution for enhancing terahertz radiation and developing terahertz lasers.

The effect of temperature cycles on conductivity mechanism using polyimide

Traditionally, conductivity, a key parameter for evaluating the probability of electrostatic discharge, has been subscribed to the belief that it is a constant value. However, in actual working conditions, such as the low earth orbit environment, the conductivity value of dielectrics is not constant due to the variation in temperature. Therefore, it is of great practical significance to investigate the conductivity value of dielectrics in the time-varying field and explore the hidden mechanism of the charging phenomenon. In this paper, we investigated the dynamic conductivity value using polyimide during four temperature cycles. The result shows that there is a positive correlation between conductivity and temperature above the turning point temperature. However, when the temperature is lower than the turning point temperature, the conductivity value hardly changes with temperature. In the four cycles, the conductivity value in the same temperature decreases with the cycles. The space charge distribution test and the thermally stimulated current experiment are carried out to explain the charging phenomenon. The results show that the heterocharge accumulates continually and is captured by deep traps above 0.55 eV. It could be concluded that the thermally stimulated detrapping effect makes the charge trapping difficult, which results in the conductivity value in the same cycle changing with the temperature above the turning point temperature and the heterocharge accumulating. The trap-filling effect inhibits the charge conduction process, which makes the conductivity value in the same temperature to decrease with temperature cycles.

Galerkin finite element analysis of magneto-hydrodynamic natural convection of Cu-water nanoliquid in a baffled U-shaped enclosure

In this paper, single-phase homogeneous nanofluid model is proposed to investigate the natural convection of magneto-hydrodynamic (MHD) flow of Newtonian Cu–H2O nanoliquid in a baffled U-shaped enclosure. The Brinkman model and Wasp model are considered to measure the effective dynamic viscosity and effective thermal conductivity of the nanoliquid correspondingly. Nanoliquid's effective properties such as specific heat, density and thermal expansion coefficient are modeled using mixture theory. The complicated PDS (partial differential system) is treated for numeric solutions via the Galerkin finite element method. The pertinent parameters Hartmann number (1 ≤ Ha ≤ 60), Rayleigh number (103 ≤ Ra ≤ 106) and nanoparticles volume fraction (0% ≤ ϕ ≤ 4%) are taken for the parametric analysis, and it is conducted via streamlines and isotherms. Excellent agreement between numerical results and open literature. It is ascertained that heat transfer rate enhances with Rayleigh number Ra and volume fraction ϕ, however it is diminished for larger Hartmann number Ha.

Salt-solvent mixtures (SSMs): Investigation of physiochemical, thermodynamic and electrochemical properties of multifunctional imidazolium ionic liquids with DMSO

Research on Ionic Liquids (ILs) recently focuses on investigating the properties of ILs salt-solvent mixtures (SSMs). The SSMs gained an unprecedented popularity because it offers wide range of properties necessary for the desired applications. In this work, imidazolium ILs containing nitrile and varying number of ether group coupled with bis(trifluoromethanesulfonyl)imide anion were synthesized. These ILs were mixed with dimethylsulfoxide (DMSO) in various mole ratio to form a salt-solvent mixtures. Density, dynamic viscosity and electrical properties of pure ILs and its mixtures were investigated over a wide temperature range. Thermodynamic properties such as thermal coefficient of expansion, standard entropy and lattice energy of pure ILs increased when the number of ether group on the cation side chain increased. Dynamic viscosities and electrical conductivity of the SSMs were investigated over a wide temperature range and different mole ratio, described by Vogel–Fulcher–Tamman (VFT) equation and Arrhenius equation. The relationship between dynamic viscosity and electrical conductivity was illustrated by Walden's Rule and it revealed that the SSM's have high conductivities at low fluidity, which can be categorized as ‘super ionic liquids’. Electrochemical potential window (EPW) and conductivity results for the SSMs revealed their (Mole ratio ILs =0.8) excellent potential in electrochemical applications.

Enhanced mechanical and thermal properties of polyamide 6/p (N-(4-F-phenylmaleimide)–alt-styrene) composites based on interfacial complexation inducing crystal transformation

Improving complexation at the interfaces and regulating the crystal transformation behaviors of polyamide 6 (PA6) composites with high mechanical and thermal properties are essential for the industrial applications of PA6. In this work, the effects of adding p (N-(4-F-phenylmaleimide)-alt-styrene) (PFS) on the crystal transformation, thermostability, thermal conductivity, and mechanical properties of PA6 were investigated and discussed systematically. The resu---lts from heat deflection temperature (HDT), dynamic mechanical analysis (DMA) and thermal conductivity tests indicate that PFS greatly increases the HDT, glass-transition temperature (Tg), and thermal conductivity of PA6. Simultaneously, when the content of PFS is 10%, the tensile strength and flexural moduli of PA6/PFS composites are increased by 10.5 and 17.8% compared with that of pure PA6, respectively. The results from differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) show that PFS induces the transformation of PA6 from γ to α crystals by interfacial complexation. This work offers a facile approach for producing materials with high thermal and mechanical performances that can be potentially used in automobiles, electronics, and related technologies.

Dynamical conductivity of lithium-intercalated hexagonal boron nitride films: A memory function approach

This work is a study of dynamical conductivity of a quasi-two-dimensional heterostructure Li(BN)8. The conducting electrons have a free-electron-like parabolic dispersion and are assumed to scatter only on acoustic phonons. The approach used to derive the generalized Drude relation with frequency and temperature dependent relaxation consists of defining the induced current density as a function of the electron-hole operator. This element is proportional to the perturbating electric field and is decomposed into the zeroth and second order of the electron-phonon interaction. The electron-hole operator is then evaluated using the Heisenberg equation. The connection between the electron-hole operator and the memory function is shown. The analytical properties of the imaginary and real part of the frequency and temperature dependent memory function, that describe electron scattering on acoustic and optical phonons, are examined in detail. Finally, the dynamical conductivity of Li(BN)8 is calculated, with the explanation of all relevant features originating from the memory function.

Numerical Modeling of Transcritical and Supercritical Fuel Injections Using a Multi-Component Two-Phase Flow Model

In the present numerical study, implicit large eddy simulations (LES) of non-reacting multi-components mixing processes of cryogenic nitrogen and n-dodecane fuel injections under transcritical and supercritical conditions are carried out, using a modified reacting flow solver, originally available in the open source software OpenFOAM®. To this end, the Peng-Robinson (PR) cubic equation of state (EOS) is considered and the solver is modified to account for the real-fluid thermodynamics. At high pressure conditions, the variable transport properties such as dynamic viscosity and thermal conductivity are accurately computed using the Chung transport model. To deal with the multicomponent species mixing, molar averaged homogeneous classical mixing rules are used. For the velocity-pressure coupling, a PIMPLE based compressible algorithm is employed. For both cryogenic and non-cryogenic fuel injections, qualitative and quantitative analyses are performed, and the results show significant effects of the chamber pressure on the mixing processes and entrainment rates. The capability of the proposed numerical model to handle multicomponent species mixing with real-fluid thermophysical properties is demonstrated, in both supercritical and transcritical regimes.

Ab initio dynamical stability and lattice thermal conductivity of vanadium and niobium at high temperature

It is believed that the quasi-harmonic approximation can well describe the volume-dependent phonon frequency of most materials at zero temperature. In this work, we found that this widely used method cannot accurately describe the phonon frequencies of transition metals V and Nb at 0 GPa and 0 K. Therefore, the phonon-phonon interactions are further considered, and the phonon dispersion curves of V and Nb varying with temperature under zero pressure are derived. It is found that the calculated phonon dispersion curves of them at 300 K are in good agreement with the experimental results, indicating that the anharmonic effect is of great importance in the case of V and Nb. In addition, combined with the Boltzmann transport equation of phonons, the lattice thermal conductivity of V and Nb is also studied. The results show that the lattice thermal conductivity of V and Nb at 300 K is 4.35 and 9.87 Wm−1K−1, which are far lower than their electronic thermal conductivity at the same temperature, indicating that the electronic thermal conductivity of V and Nb is dominant at room temperature.

Synergistic modification of the tribological properties of polytetrafluoroethylene with polyimide and boron nitride

Polytetrafluoroethylene (PTFE) blended with polyimide (PI) and filled with boron nitride (BN) is prepared through cold pressing and sintering for composites with remarkable wear resistance and reduced coefficient of friction (COF). The characterizations show that BN and PI at different levels, improve the hardness, dynamic thermo-mechanical modulus, thermal conductivity, and tribological properties of PTFE. PI boosts the dispersion and bonding of BN in PTFE. In dry sliding friction of a block-on-ring tribometer, the wear rate and COF of 10:10:80 BN/PI/PTFE reduce to almost 1/300 and 80% of those of pure PTFE, respectively, as the wear mechanism transition from being adhesive to partially abrasive. This occurs only when the additives BN and PI induce a synergistic effect, that is, at concentrations that are not higher than ca. 10 wt% and 15 wt%, respectively. The obvious agglomeration at high percentages of added PI and severe conditions (400 N and 400 rpm) induce strong adhesive failure. The variations in the tensile properties, hardness, crystallization, and microstructure of the composites correspond to different effects. The multiple parameters of the plots of wear and friction are transformed into their contour curves. The mechanism transition maps aid in understanding the influence of various test conditions and composite compositions on the contact surfaces in the space-time framework of wear.

Transport Coefficients of Air - PMMA Mixtures Thermal Plasmas

The transport coefficients of Air - PMMA mixtures thermal plasmas is important to estimate the performances of cutting of the electrical arc in this gas by a circuit breaker. In this paper, Air - PMMA mixtures thermal plasmas dynamical viscosity, thermal and electrical conductivities coefficients are calculated in a temperature range from 5000K to 30000K. The calculations are made by supposing thermodynamic equilibrium at pressure of 1 bar to 10 bar. The results of the calculations show the influence of the initial proportion of PMMA but also that of the pressure on the mixture plasma transport coefficients. As the efficiency of the breaking of the electric current by the circuit breaker depends closely on the thermal and electrical characteristics of the extinguishing medium, this extinguishing medium should have a high thermal conductivity and an electrical conductivity varying rapidly with temperature. The plasma of the mixture constituted by 80% of air and 20% of PMMA presents at first sight best characteristics for the breaking of electric current. It has the highest thermal conductivity peak among the plasmas of the mixtures studied.

Effect of moisture content on space charge behavior in oil-paper insulation under DC electric field

This study investigates the effect of moisture content on space charge characteristics based on the dynamic space charge response and conductivity characteristics of oilpaper insulation under a DC electric field. Moisture contents ranging from 0.34–2.89% are considered under an electric field of up to 20 kV/mm. The results show that homocharge accumulates inside the oil-paper insulator near both electrodes, with the amount of charge gradually increasing as the moisture content rises. It may be related to the decreased charge injection barrier at the electrode-sample interface as the moisture level increases. The conductivity increases with the rise in moisture level. However, as the conductivity increases, the corresponding space charge accumulation during polarization does not decrease, but increases significantly. This indicates that space charge accumulation may be related to both charge injection and conductivity. The electric field distortion inside the oil-paper insulator increases as the moisture content rises, with the maximum electric field distortion rate going from 16.9 to 92.9% at 5 kV/mm and from 29.7 to 62.5% at 20 kV/mm.

Lattice Boltzmann simulation of natural convection heat transfer of a nanofluid in a L-shape enclosure with a baffle

In the present study, the fluid flow and heat transfer of a Cu-water nanofluid in a L-shaped enclosure with a baffle is numerically simulated using the Lattice Boltzmann Method (LBM). The implementation of different baffle combinations with the L shape cavity is the novel contribution of this study. The effect of baffle configuration on natural convection in different parameter ranges of Rayleigh number (103–105) and nanoparticle volume fraction (0–0.05) is investigated. Various baffle configuration cases are examined based on baffle length (L) and position (S). The baffled L shape results are also compared to the results obtained from a L shape without a baffle that were also achieved in this study and are validated with excellent agreement with existing data. Different models are used for evaluating the dynamic viscosity and thermal conductivity, to compare the effects of nanofluid properties. The results show that at low Rayleigh numbers (103–104), the addition of baffle always enhances natural convection. In high Rayleigh numbers (105), only the longer baffle (L = 0.30 m) can improve natural convection regardless of its positioning. The longer baffle is always more effective with proper positioning (S = 0.4 m) and the case C baffle configuration (L = 0.30 m, S = 0.4 m) is the most effective in all conditions.

Ultra-extraordinary optical transmission induced by cascade coupling of surface plasmon polaritons in composite graphene-dielectric stack.

Surface plasmon polaritons have been extensively studied owing to the promising characteristics of near fields. In this paper, the cascade coupling of graphene surface plasmon polaritons (GSPPs) originating from cascading excitation and multiple coupling within a composite graphene-dielectric stack is presented. GSPPs confined to graphene layers are distributed in the entire stack as waveguide modes. Owing to the near-field enhancement effect and large lifetime of the GSPPs, the terahertz wave-graphene interaction is significantly enhanced, which induces an ultra-extraordinary optical transmission (UEOT) together with the reported negative dynamic conductivity of graphene. Furthermore, owing to cascade coupling, the UEOT exhibits considerable transmission enhancement, up to three orders of magnitude, and frequency and angle selections. Based on the key characteristics of cascade coupling, the mode density and coupling intensity of GSPPs, the dependences of the number of graphene layers in the stack, the thickness of dielectric buffers, and the effective Fermi levels of the graphene on the UEOT are also analyzed. The proposed mechanism can pave the way for using layered plasmonic materials in electric devices, such as amplifiers, sensors, detectors, and modulators.

A DOMIAN DECOMPOSITION METHOD FOR STEADY FREE CONVECTIVE COUETTE FLOW IN A VERTICAL CHANNEL WITH NON-LINEAR THERMAL RADIATION, DYNAMIC VISCOSITY AND DYNAMIC THERMAL CONDUCTIVITY EFFECTS

In this paper, we investigate steady free convective Couette flow in a vertical channel with nonlinear thermal radiation, dynamic viscosity and dynamic thermal conductivity effects. The investigation is motivated by the studies of some researchers which assumed linear thermal radiation and constant fluid properties. However, this is uncalled for; as these assumptions do not reflect true behavior of the flow. For instance; increase in temperature affects fluid viscosity, thermal conductivity thereby changing the transport phenomenon. Here; the investigation considers both the fluid viscosity and thermal conductivity to be dependent on temperature with the thermal radiation adopting nonlinear form. Due to this reasons, the associated flow equations are highly nonlinear and exhibit no analytical solution and therefore require the use of Adomian decomposition method (ADM) of solution. The attained ADM solution is then coded into computer algebra package of mathematica where results under the parameters of interest are presented and discussed. Results of the investigation show that raising the thermal radiation leads to corresponding rise in both the velocity and temperature of the fluid in the channel. Furthermore; lessening the viscosity and thermal conduction of the fluid were identified to escalate both velocity and temperature of the fluid.

Layered Dynamical Conductivity for a Transfer Matrix Method — Application to an \(\mathcal{N}\)-layer Graphene —

We calculated the optical properties of an $N$-layer graphene by formulating the dynamical conductivity of each layer. This is the conductivity when an electromagnetic field is localized at a particular layer and differs from the standard conductivity calculated assuming a uniform field throughout all layers. By combining these conductivities with a transfer matrix method, we took into account the spatial variation of the electromagnetic field caused by internal reflections. The results obtained from the two conductivities show that similar peak structures originating from the interlayer electronic interaction appear in reflectance of an $N$-layer graphene at any $N$. The peak is inherent to the AB stacking and is not seen for the AA stacking, and the peak corresponding to a sufficiently large $N$ is considered to the one observed for natural graphite. We also gave physical explanations of the existing experimental results on highly oriented pyrolytic graphite and natural graphite under high pressure. Although a layered conductivity underestimates the reflectance of graphite at photon energies below the peak, we will show that the disagreement is attributed to a nonlocal conductivity caused by interlayer interaction. The calculations with layered conductivity are useful in knowing the local response to light and may be further validated by an observation of a correction by interlayer electronic interaction to the universal layer number that we have discovered recently.

Effect of twisted turbulator and various metal oxide nanofluids on the thermal performance of a straight tube: Numerical study based on experimental data

In this paper, the effect of using turbulator and different oxides water based nanofluids on heat transfer characteristics of a straight tube have been investigated numerically based on empirical data. In the first part, the influence of SiO2-water nanofluid concentration increment, ranging from 0.5 to 2 % volume fraction on the heat transfer coefficient and pressure drop has been investigated. The dynamic viscosity and thermal conductivity of studied fluids have been measured experimentally. The fluid's outlet temperature, overall heat transfer coefficient, pressure drop, and thermal performance were the important parameters which have been addressed. Numerical simulation has been done with the aid of finite volume method. According to the results, increase in Silica-water nanofluid concentration up to 2 % led to rise in heat transfer coefficient averagely by 7.93 %, pressure drop by 13.96 % and thermal performance by 4.2 %. In second section, heat transfer coefficient, pressure drop, and thermal performance of four different water based nanofluids in 2 % volume fraction containing Al2O3, CuO, TiO2, and SiO2 have been compared with each other. Results indicated that CuO-water nanofluid had better thermal performance among the other nanofluids by amount of 1.0632.

Experimental and numerical analysis of damage mechanisms for carbon fiber-reinforced polymer composites subjected to lightning strikes

This study aims to reveal the damage properties and mechanism of carbon fiber-reinforced polymer (CFRP) composites subjected to lightning current component A by artificial lightning tests and simulation analysis. The lightning strike process was observed by using a high-speed camera and infrared temperature measurements. The surface damage and internal damage were inspected via ultrasonic and 3D X-ray scanning. The damage behavior of CFRP composite was deduced and the damage regions were quantitively analyzed by detecting the surface morphology and microstructural changes and analyzing the lightning strike process. The results indicated that the lightning-induced damage included lightning attachment damage due to direct contact with the lightning arc, laminate peeled-off damage caused by the explosive gas impact, and internal delamination induced by expanding pyrolysis gas. A coupled thermal-electric CFRP model, which first introduces the dynamic conductivity of CFRP materials, was established. The comparison results indicated that the Joule heating-based numerical model can simulate the evolution of thermal damage well, although the laminate peeled-off damage resulting from the mechanical impact was not included in the simulation scope. A temperature field criterion and a pyrolysis degree field criterion were proposed and verified for evaluating in-plane and in-depth damage with acceptable deviations.

Styrene-Based Elastomer Composites with Functionalized Graphene Oxide and Silica Nanofiber Fillers: Mechanical and Thermal Conductivity Properties.

The mechanical and thermal conductivity properties of two composite elastomers were studied. Styrene–butadiene rubber (SBR) filled with functionalized graphene oxide (GO) and silica nanofibers, and styrene–butadiene–styrene (SBS) block copolymers filled with graphene oxide. For the SBR composites, GO fillers with two different surface functionalities were synthesized (cysteamine and dodecylamine) and dispersed in the SBR using mechanical and liquid mixing techniques. The hydrophilic cysteamine-based GO fillers were dispersed in the SBR by mechanical mixing, whereas the hydrophobic dodecylamine-based GO fillers were dispersed in the SBR by liquid mixing. Silica nanofibers (SnFs) were fabricated by electrospinning a sol–gel precursor solution. The surface chemistry of the functionalized fillers was studied in detail. The properties of the composites and the synergistic improvements between the GO and SnFs are presented. For the SBS composites, GO fillers were dispersed in the SBS elastomer at several weight percent loadings using liquid mixing. Characterization of the filler material and the composite elastomers was performed using x-ray photoelectron spectroscopy, x-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, dynamic mechanical analysis, tensile testing, nanoindentation, thermal conductivity and abrasion testing.