Conductivity Volume Research Articles

N-doped foam flame retardant polystyrene derived porous carbon as an efficient scaffold for lithium-selenium battery with long-term cycling performance

Owing to the preponderances in easy preparation and low cost, N-doped foam flame retardant polystyrene (FRPS) could be regarded as a sustainable precursor to develop porous carbonaceous frameworks for the encapsulation of elemental selenium. In this paper, an electrode material of Se encapsulated in N-doped foam flame retardant polystyrene based porous carbon framework (Se@KF65) was fabricated by carbonization/activation of N-doped foam polystyrene and selenium-loading for high-performance lithium batteries. Due to the fact that KF65 acted as a stable matrix for Se and facilitates electronic conductivity and ion transportation, the Se@KF65 composite exhibited large reversible capacity, high rate performance and durable long-term cycling stability. Moreover, the high specific surface area, large pore volume and good electron conductivity of Se@KF65 composite showed the reversible electrochemical reaction of selenium towards metallic Li, and at the current density of 1 A g−1, Se@KF65 composite electrode exhibited a reversible capacity of 917.8 mAh g−1 after 600 cycles. The easily obtained mi/macrospores features of Se@KF65 composite indicated that large-scale treatment of the polymer material may find its potential application in renewable green energy storage.

Does the Processing Method Resulting in Different States of an Interconnected Network of Multiwalled Carbon Nanotubes in Polymeric Blend Nanocomposites Affect EMI Shielding Properties?

Electromagnetic interference (EMI), an unwanted phenomenon, often affects the reliability of precise electronic circuitry. To prevent this, an effective shielding is prerequisite to protect the electronic devices. In this study, an attempt was made to understand how processing of polymeric blend nanocomposites involving multiwalled carbon nanotubes (MWCNTs) affects the evolving interconnected network structure of MWCNTs and eventually their EMI shielding properties. Thereby, the overall blend morphology and especially the connectivity of the polycarbonate (PC) component, in which the MWCNTs tend to migrate, as well as the perfectness of their migration, and the state of nanotube dispersion are considered. For this purpose, blends of varying composition of PC and poly(methyl methacrylate) were chosen as a model system as they show a phase diagram with lower critical solution temperature type of characteristic. Such blends were processed in two different ways: solution mixing (from the homogeneous state) and melt mixing (in the biphasic state). In both the processes, MWCNTs (3 wt %) were mixed into the blends, and the evolved structures (after phase separation induced by annealing in solution-mixed blends) and the quenched structures (as the blends exit the extruder) were systematically studied using transmission electron microscopy (TEM). Both the set of blends were subjected to the same thermal history, however, under different conditions such as under quiescent conditions (in the case of solution mixing) and under shear (in the case of melt mixing). The electrical volume conductivity and the evolved morphologies of these blend nanocomposites were evaluated and correlated with the measured EMI shielding behavior. The results indicated that irrespective of the type of processing, the MWCNTs localized in the PC component; driven by thermodynamic factors and depending on the blend composition, sea-island, cocontinuous, and phase-inverted structures evolved. Interestingly, the better interconnected network structures of MWCNTs observed using TEM in the solution-mixed samples together with larger nanotube lengths resulted in higher EMI shielding properties (−27 dB at 18 GHz) even if slightly higher electrical volume conductivities were observed in melt-mixed samples. Moreover, the shielding was absorption-driven, facilitated by the dense network of MWCNTs in the PC component of the blends, at any given concentration of nanotubes. Taken together, this study highlights the effects of different blend nanocomposite preparation methods (solution and melt) and the developed morphology and nanotube network structure in MWCNT filled blend nanocomposites on the EMI shielding behavior.

Volumetric, Viscosity and Conductance Studies of Solute–Solute and Solute–Solvent Interactions of Some Alkali Metal Chlorides in Aqueous Citric Acid at Different Temperatures

Abstract The present study aims for the structure-making and structure-breaking behavior of some electrolytes in aqueous citric acid solution. The density, viscosity and conductance of some alkali metal chlorides lithium chloride (LiCl), sodium chloride (NaCl) and potassium chloride (KCl) in 0.01 m aqueous citric acid have been measured in the concentration range 0.01–0.12 m at 303.15, 308.15, 313.15 and 318.15 K. From these measurements, molar volume, viscosity parameters and molar conductance have been deliberated. Debye Hückel limiting law is used for the assessment of the contributions of various types of solute–solvent interactions. Jones–Dole viscosity equation is used to calculate viscosity B-coefficient for these salts in aqueous citric acid, which is known to provide information concerning the solvation of ions and their effects on the structure of the solvent in the near environment of the solute particles. The free energies of activation of viscous flow per mole of solvent, Δ μ 1 0 ‡ $\Delta \mu _1^{0\ddagger }$ and solute, Δ μ 2 0 ‡ , $\Delta \mu _2^{0\ddagger },$ have also been evaluated by using viscosity data. Using molar volume, the transfer volume Фv o tr has also been computed. The structure making/ breaking behavior of LiCl, NaCl and KCl is inferred from the sign of second derivative of partial molar volume with respect to temperature at constant pressure (d2φv o/dT2)p, Temperature coefficient of B. dB/dT and temperature coefficient of Walden product i.e. d(Λm oηo)/dT values. It has been found from these studies that LiCl, NaCl and KCl behave as structure-breaker in 0.01 m aqueous citric acid solution. The results have been qualitatively used to explain the molecular interaction and structural changes between the components of these mixtures.

Geomechanical Simulation of Partially Propped Fracture Closure and Its Implication for Water Flowback and Gas Production

Summary Uneven proppant distribution is often encountered in hydraulic fracturing. Despite propped and unpropped fractures exhibiting different closure behavior during shut-in and early-flowback periods as a result of changes in effective stress, modeling of the geometry and closure behavior of a partially propped fracture is rarely performed. Numerical simulation is used in this study to simulate the closure behavior of a partially propped fracture and to examine its effects on water flowback and gas production. Explicit finite-difference geomechanical simulation is used to simulate the change in effective stress and the corresponding closure geometry of a partially propped fracture. Parameters including rock strength, in-situ stress condition, proppant compaction, and propped-fracture height and aperture are considered to understand their effects on the fracture-closure geometry. This partially propped fracture is then represented explicitly in the computational domain in a flow simulation to model fluid flow during the shut-in and flowback periods. Fracture volume and fracture conductivity are adjusted as a function of effective stress to represent the fracture-closure process. The effect of coupling of partially propped fracture closure and multiphase flow on water recovery and gas production is investigated. Implications of ignoring the physical process of fracture closure and complex partially propped fracture geometry are examined. Geomechanical-simulation results reveal the potential formation of a residual opening above the proppant pack in a partially propped fracture. Three distinct parts are identified within a partially propped fracture: a propped region, an unpropped region, and a residual opening (arch). The size of the residual opening is most sensitive to the initial fracture aperture. Stress concentrations occur at the top of the proppant pack and lead to potential proppant crushing or embedment. In addition to water uptake into the matrix because of forced (large pressure differential across the matrix/fracture interface) and spontaneous (high capillary pressure in the matrix) imbibition, fracture closure during the shut-in and flowback periods could displace more water into the nearby matrix and reduce the final water recovery. The residual opening would exaggerate the effects of gravity segregation and hamper water recovery by providing a highly conductive flow path to gas flow, such that the water would accumulate near the bottom of the fracture. The implication is that more-aggressive drawdown should be implemented to recover the fracturing fluid. This study offers a quantitative analysis of the geometry of a partially propped fracture and highlights its effects on water flowback and gas production. The existence of the residual opening, which is commonly ignored in most analysis, would indeed play a crucial role in the subsequent well performance and in-situ fluid distribution. A number of insights pertinent to practical fracture design and operational strategy are discussed.

Thermal Conductivity of Ionic Liquids and IoNanofluids and Their Feasibility as Heat Transfer Fluids

Ionic liquids and ionanofluids were studied in recent years as possible alternatives to current engineering fluids, namely in the area of heat transfer. Excellent thermal properties, like high heat capacity per unit volume and thermal conductivity, allied to the dispersion of nanoparticles in them, have created great expectations, as the enhancement of their thermophysical properties liquids can contribute to better efficiency in heat transfer. The thermal conductivity of [P66614][N(CN)2], [P66614][Br], [C2mim][SCN], [C4mim][SCN], [C2mim][C(CN)3], and [C4mim][C(CN)3] in the temperature range of 293–343 K at 0.1 MPa and their ionanofluids with multiwalled carbon nanotubes are reported in the present work. While we could not obtain stable suspensions with phosphonium based ionic liquids, thermal conductivity enhancement of cyano-based ionic liquids was compared with our previous work using dicyanamide ionic liquids. The thermal conductivity of C2mim+ ionic liquids and ionanofluids is generally higher than t...

Carbonization Temperature As a Key Factor for Ultrahigh Performance Activated Carbon from Polyaniline for Capacitive Deionization

Capacitive deionization (CDI) has been considered a reliable technology used to provide water with low salt concentration and low energy consumption. However, there are still some drawbacks to overcome concerning the choice of the electrode material. Carbon electrodes are extensively used for CDI electrodes since they provide a stable material with high pore volume and good conductivity. However, it is been challenging to find a low-cost symmetric CDI electrode with high salt adsorption capacity (SAC), fast electrosorption kinetics and good energy efficiency. Recently, our group published a paper reporting the use of activated carbon derived from polyaniline (PAC), a low-cost precursor, with high SAC and good electrosorption kinetics. It was demonstrated that the use of different polyaniline (PAni) dopants have a strong influence on the activate carbon properties and, consequently, the electrode performance for CDI. In the present research, it was explored the use of PAC electrodes varying the carbonization temperature before the activation. It was observed a strong dependence of the specific surface area (SSA) and pore size distribution (PSD) on the carbonization temperature. When low temperatures (500 °C) were employed during carbonization (PAC500), the BET SSA was 3653 m²/g and pore volume of 2.50 cm³/g was obtained while at higher carbonization temperatures (850 °C) this value was much lower (2362 m²/g of SSA and 1.26 cm²/g of pore volume for PAC850). The BET SSA obtained in this work is among the highest values reported in literature. The explanation for this high value is probably ascribed to the reactivity of the low temperature carbonized PAni with KOH. Indeed, when PAni was carbonized in temperatures lower than 500 °C all the material was consumed during the activation step, indicating a strong reactivity of the precursor with KOH. These values of SSA and pore volume resulted in an outstanding performance as symmetrical electrodes for CDI. The capacitance of PAC500 and PAC850 measured in a NaCl 0.2 M solution were 213 F/g and 162 F/g, respectively. These impressive values are result of the high SSA and pore volume of PAC materials. Finally, the CDI desalination carried out in batch operation mode also showed an outstanding SAC performance for symmetric electrodes, achieving 22 mg/g for PAC500 and 15 mg/g for PAC850. Moreover, 85% and 76% of electrode saturation was reached after 5 minutes of electrosorption for PAC500 and PAC850, respectively, indicating very fast electrosorption kinetics. This work present a very promising electrode material for CDI and shows how important is the carbonization temperature for PAC electrodes. Figure 1

Cardiac fibroblast-specific p38α MAP kinase promotes cardiac hypertrophy via a putative paracrine interleukin-6 signaling mechanism.

Recent studies suggest that cardiac fibroblast-specific p38α MAPK contributes to the development of cardiac hypertrophy, but the underlying mechanism is unknown. Our study used a novel fibroblast-specific, tamoxifen-inducible p38α knockout (KO) mouse line to characterize the role of fibroblast p38α in modulating cardiac hypertrophy, and we elucidated the mechanism. Myocardial injury was induced in tamoxifen-treated Cre-positive p38α KO mice or control littermates via chronic infusion of the β-adrenergic receptor agonist isoproterenol. Cardiac function was assessed by pressure–volume conductance catheter analysis and was evaluated for cardiac hypertrophy at tissue, cellular, and molecular levels. Isoproterenol infusion in control mice promoted overt cardiac hypertrophy and dysfunction (reduced ejection fraction, increased end systolic volume, increased cardiac weight index, increased cardiomyocyte area, increased fibrosis, and up-regulation of myocyte fetal genes and hypertrophy-associated microRNAs). Fibroblast-specific p38α KO mice exhibited marked protection against myocardial injury, with isoproterenol-induced alterations in cardiac function, histology, and molecular markers all being attenuated. In vitro mechanistic studies determined that cardiac fibroblasts responded to damaged myocardium by secreting several paracrine factors known to induce cardiomyocyte hypertrophy, including IL-6, whose secretion was dependent upon p38α activity. In conclusion, cardiac fibroblast p38α contributes to cardiomyocyte hypertrophy and cardiac dysfunction, potentially via a mechanism involving paracrine fibroblast-to-myocyte IL-6 signaling.—Bageghni, S. A., Hemmings, K. E., Zava, N., Denton, C. P., Porter, K. E., Ainscough, J. F. X., Drinkhill, M. J., Turner, N. A. Cardiac fibroblast-specific p38α MAP kinase promotes cardiac hypertrophy via a putative paracrine interleukin-6 signaling mechanism.

Analysis of Ricefield Land Damage in Denpasar City, Bali, Indonesia

Soil as a natural resource, living area, environmental media, and factors of production including biomass production that supports human life and other living beings must be preserved, on the other hand, uncontrolled biomass production activities can cause soil damage, ultimately can threaten the survival of humans and other living things. Therefore, in order to control soil damage, first must inventories the soil condition data and its damage which then visualised in soil damage potential and soil damage status. The activities of the study are the preparation of a map of the initial soil conditions and the delineation of potentially land degradation distribution. Mapping results are used as work maps for verification on the field to take soil samples and create soil damage status. In general, Denpasar City have soil damage potential at very low, low until medium rate. Soil damage status in Denpasar City generally is low damage of bulk volume, total porosity, soil permeability and electrolyte conductivity which beyond limitation thresholds.

A novel method for synthesis of polyaniline and its application for catalytic degradation of atrazine in a Fenton-like system

Recently, polyaniline (PANI) has received widespread attention for the free volume, optical transmittance and electrical conductivity. In this study, a chemical vapor deposition method was developed to synthesize the conductive PANI-clay composite catalyzed by Fe(III)-saturated attapulgite (Fe(III)-ATTP). The reaction is initiated by the electron transfer from aniline (ANI) to Fe(III), subsequently generating ANI radical cation. The radical could further polymerize and form PANI in the constrained micropore structure of ATTP. The Raman, Fourier transform infrared and X-ray photoelectron spectra confirmed the formation of PANI on Fe(III)-ATTP surface by comparison with the PANI standard. The newly synthesized Fe(III)-ATTP-PANI composite exhibited superior reactivity as indicated by the efficient dissipation of atrazine in the presence of hydrogen peroxide (H2O2), and the degradation rate increased up to almost 150 times compared to Fe(III)-ATTP. The higher reactivity of Fe(III)-ATTP-PANI/H2O2 system was attributed to the accelerated electron transfer, the formation of ferrous ions, and the enhanced adsorption of atrazine onto attapulgite. Furthermore, our experimental results demonstrated that Fe(III)-ATTP-PANI showed good stability and it could be reused for several reaction cycles with high reactivity. This new material could act as an environmental-friendly catalyst in Fenton-like reaction system and show promising potential to effectively eliminate many persistent organic contaminants.

Effect of Polarity on Volume Conductivity of Polymers, Determined by Corona Triode Method

In this paper, the effect of polarity on the volume conductivity of Kapton and polyethylene (PE), determined using the corona triode method, when the sample current depends linearly on grid potential, was studied. For the determination of volume conductivity, in addition to the analytical method, for the first time, a graphical method is presented as well. According to the experimental results, obtained by both methods, the volume conductivity values of negative corona charged samples were higher than those of the samples charged by positive corona. Considering the different nature of positive and negative coronas, these differences in results are to be expected and are in full accordance with the theoretical considerations as well. On the other hand, the good agreement between the analytical method results and those obtained by the graphical method, indicates high accuracy of the proposed analytical formula. Meanwhile, the satisfying accordance of experimental results with those found by the classical “static” and “dynamic” methods, confirms the accuracy of the corona method, for the determination of volume conductivity of polymers.

Applicability of volume conductivity and scatter parameters for early prediction of dengue virus infection

Introduction: Dengue virus infection is an acute febrile illness endemic in several countries including India. Although the management is empirical, early diagnosis is crucial for timely intervention to reduce the morbidity and mortality. The diagnosis of dengue virus infection mainly depends on serological testing and virus isolation which are costly and time-consuming. A simple blood test like complete blood count (CBC) run on five-part differential cell counter with volume conductivity, and scatter (VCS) data can help in predicting dengue infection without additional cost. Methods: In the present study, we analyzed VCS parameters of 337 febrile patients over the period of 1 year (January 2016 to December 2016). Out of these, 255 cases were positive for dengue serology and 82 were febrile controls. Comparative analysis of utility of previously published dengue factor, lymph index, and monocyte factor along with the “New Dengue Factor” introduced in the present study. Results: The “New Dengue Factor” proposed by us gave highest “positive likelihood ratio” for the diagnosis of dengue virus infection. Dengue factor proposed by Sharma et al. was the most “sensitive,” and “lymph index” proposed by Hawaldar et al. was the most specific followed by the “New dengue factor” introduced in the present study. Conclusion: Factors derived from VCS parameters are useful for early prediction of dengue virus infection without incurring additional cost and thus would contribute to better patient care.

Determination of Volume Conductivity of Thin Polymeric Films Using Corona Triode, When the Current through the Sample Depends Quadratically on Grid Potential

In this paper is determined the volume conductivity of thin polymeric films using the corona triode method, when the current through the sample exhibits a quadratic dependence on the grid potential. Based on the experimental data, for the first time, an effective methodology for the determination of volume conductivity, graphically and analytically, is composed. The results obtained by the proposed analytical formula, for polypropylene and Trespaphan, with two different configurations of structures, are closely similar to the graphical method results. In addition, the satisfying accordance of our results, with the results, found out with the consulted literature, obtained by the “static” methods, confirms the accuracy of the proposed methodology, for the determination of volume conductivity of thin polymeric films, using the corona triode.

Electrical characterization of aeronautical nanocomposites supported by Tunneling AFM (TUNA)

Epoxy nanocomposites fulfill tight and compelling industrial requirements in the field of structural material for aeronautical applications. In this paper the development and characterization of nanocomposites obtained by filling tetrafunctional epoxy resin (tetraglycidyl methylene dianiline cured with the aromatic diamine 4,4’-diaminodiphenylsulfone, named T20BD) with carbon nanofibers (CNF) is discussed. A filler amount ranging from 0.05% to 2%wt is considered. The DC volume conductivity and the dielectric characteristics (ϵ’) of the nanocomposites in the frequency range 100Hz-1MHz are analyzed and compared with those of the pure resin. Atomic force microscopy, mapping the local topography by means of tunneling effect, is used for recording the electrical percolation path for nanocomposites. In particular, the case 1.3wt% of CNF filled nanocomposites that exhibits a stable behavior of the conductivity in the full investigated frequency range, is here reported. The developed filled epoxy used in carbon fiber reinforced composites, shows enhanced electrical properties leading to better electromagnetic (EM) performances in EM coatings, EM shields and filters or radar absorber materials (RAMs).

A computational geometry approach to pore network construction for granular packings

Pore network construction provides the ability to characterize and study the pore space of inhomogeneous and geometrically complex granular media in a range of scientific and engineering applications. Various approaches to the construction have been proposed, however subtle implementational details are frequently omitted, open access to source code is limited, and few studies compare multiple algorithms in the context of a specific application. This study presents, in detail, a new pore network construction algorithm, and provides a comprehensive comparison with two other, well-established Delaunay triangulation-based pore network construction methods. Source code is provided to encourage further development. The proposed algorithm avoids the expensive non-linear optimization procedure in existing Delaunay approaches, and is robust in the presence of polydispersity. Algorithms are compared in terms of structural, geometrical and advanced connectivity parameters, focusing on the application of fluid flow characteristics. Sensitivity of the various networks to permeability is assessed through network (Stokes) simulations and finite-element (Navier-Stokes) simulations. Results highlight strong dependencies of pore volume, pore connectivity, throat geometry and fluid conductance on the degree of tetrahedra merging and the specific characteristics of the throats targeted by the merging algorithm. The paper concludes with practical recommendations on the applicability of the three investigated algorithms.

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

This study predicts the effect of the conducting filler/insulating matrix interphase on the electrical properties of two series of percolated systems, differing from the type of carbon black particles mixed in an amine‐cured epoxy matrix, diglycidylic ether of bisphenol F. To take into account the interactions between the conducting filler and the matrix, as well as filler–filler overlapping, we introduce three parameters, characteristic of the interphase zone, such as concentration, conductivity and volume, on the generalized effective medium (GEM) model for DC and AC electrical conductivities. These interphase parameters, characterizing the boundary of the shaded zone between the macromolecular chain and the conducting particles, depend on the filler type and concentration. One output of GEM‐modified model is that it provides a mean to estimate the volume, concentration and intrinsic conductivity of the interphase in a composite by fitting the experimental data over a broad range of frequency. POLYM. COMPOS., 40:346–352, 2019. © 2017 Society of Plastics Engineers

ВЛИЯНИЕ СВЕТА НА ПРОВОДИМОСТЬ И ПРОЦЕССЫ АДСОРБЦИИ–ДЕСОРБЦИИ АКЦЕПТОРОВ НА ПОВЕРХНОСТИ ТОНКИХ ПЛЕНОК СdTe:Sb

Изучено влияние внешних факторов (атмосфера, освещение) на проводимость тонких пленок CdTe:Sb. Обнаружено, что на зависимости действительной части комплексной электрической проводимости σ*=σ'+jσ''от времени под действием света с энергией кванта больше Eg наблюдается две области: резкий рост на начальном этапе и последующий спад. Показано, что наблюдаемый эффект снижения проводимости под действием света обусловлен фотодесорбцией молекул кислорода и/или воды с поверхности образца. Предложена модель «двуслойной» проводимости, представляющей собой цепь с «параллельно» соединёнными поверхностной и объемной проводимостью.
 Авторы выражают признательность к. х. н. Гапановичу М. В. за помощь в приготовлении образцов.
 Работа выполнена при финансовой поддержке проекта РФФИ № 16-08-01234 и госзадания № 01201361850.

Free Volume and Electrical Conductivity in Pure and Doped Polyvinyl Chloride with Al2O3

Free Volume and Electrical Conductivity in Pure and Doped Polyvinyl Chloride with Al2O3

폐 발포폴리스티렌과 발포폴리스티렌 비드를 활용한 경량 모르타르의 특성

본 논문에서는 발포폴리스티렌 비드 (EPB)와 폐 발포폴리스티렌 (WEP)의 대체율에 따른 경량 모르타르의 기초 특성을 평가였다. EPB 및 WEP를 이용한 경량 모르타르의 기초 특성으로서 단위용적중량, 압축 강도, 휨강도, 흡수율, 열전도율 및 폴리스티렌 (EPB 및 WEP) 분포를 분석하였다. 그 결과 경량 모르타르는 WEP의 대체율이 증가할수록 단위용적중량, 압축 강도, 휨강도, 흡수율 및 열전도율은 증가하고, 폴리스틸렌 면적 분포는 감소하였다. This study presents an evaluation of basic properties of light weight mortar with expanded polystyrene bead(EPB) and waste expanded polystyrene(WEP) by varying replacement rations. In order to evaluate the basic properties of the light weight mortar with EPB and WEP, unit weight, compressive strength, flexural strength, water absorption ratio, thermal conductivity and distribution of polystyrene (EPB and WEP) in hardened mortar were performed. As a result, unit volume, compressive strength, bending strength, water absorption and thermal conductivity of light weight mortar were increased, but area distribution of polystyrene decreased with increasing the replacement ratio of WEP.

Parameters characterizing the charge state of dielectrics

AbstractThis paper presents three physical sources of the electric field in dielectrics: excess free volume charges with the distribution qv(x,y,z), free surface charges with the distribution qs(x,y,z) and frozen polarization state in the dielectric. They have a deciding influence on the parameters of the electret, in particular they determine the total lifetime of the electret and technical components made of it. The indeterminacy related to the mutual proportions of the spatial and surface charges was discussed: one can find an infinite number of distributions of surface qse(x,y,z) and spatial qve(x,y,z) charges leading to the same distribution of the electric field E(x,y,z). A general case of electret was considered, where a coexistence of relaxation decay of frozen polarization and Maxwellian relaxation dependent on volume conductivity of the dielectric is assumed. An attempt to interpret the charge lifetime in real electrets was made.

Model‐based exploration of hydrological connectivity and solute transport in a forested hillslope

AbstractPreferential flowpaths control hydrological connectivity in forested hillslopes. However, current understanding on the nature, extent, and impacts of hydrological connectivity within hillslopes is still limited. Distributed 2‐pore domain models of subsurface water flow and solute transport in and between the preferential flowpaths and the soil matrix provide applicable means to investigate the connectivity. We identified possible (dis)connections of preferential flowpaths in a forested hillslope section from dye tracer data and incorporated them in a 3D 2‐pore domain model; the model was run and evaluated against ion tracer data. The objectives were to explore hydrological connectivity within the hillslope and quantify its impacts on solute transport. The main control for capturing the internal concentration dynamics of the ion‐tracer plume with the model was an explicit description of local disconnections of preferential flowpaths in the form of local reductions in their hydraulic conductivity. Continuous preferential flowpaths were formed by rooting activities, erosion caused by subsurface flow, freezing–thawing cycles, and soil fauna, but they were locally disconnected by, for example, cemented soil material. As a result, the dominant lateral flowpath was tortuous, and tracer transport within this pathway was highly preferential: Compared to earlier models without flowpath disconnections, increase in the average lateral tracer load was 1.7‐fold and in the maximum load 7.9‐fold. The results indicate that the volume and hydraulic conductivity of the actual, connected preferential flowpaths control, in combination with linkages between preferential flowpaths and soil matrix, pollutant transport in forested hillslopes.