The influence of pore size distribution on thermal conductivity, permeability, and phase change behavior of hierarchical porous materials

Liu, Xianglei; Song, Fangzhou; Xu, Qiao; Luo, Qingyang; Tian, Yang; Li, Jiawei; Yang, XinMeng; Jin, Yi

doi:10.1007/s11431-021-1813-0

Cited by 16 publications

(3 citation statements)

References 73 publications

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“…For instance, a large-scale crack or air-filled pore within the material would have a lower thermal conductivity compared to the surrounding zirconia. This difference in thermal conductivity could impede heat transfer across the defect boundary, potentially preventing localized overheating during laser treatment [40].…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Tailoring zirconia surface topography via femtosecond laser-induced nanoscale features: effects on osteoblast cells and antibacterial properties

Ghalandarzadeh,

Ganjali,

Hosseini

2024

Biomed. Mater.

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The performance and long-term durability of dental implants hinge on the quality of bone integration and their resistance to bacteria. This research aims to introduce a surface modification strategy for zirconia implants utilizing femtosecond laser ablation techniques, exploring their impact on osteoblast cell behavior and bacterial performance, as well as the integral factors influencing the soft tissue quality surrounding dental implants. Ultrafast lasers were employed to craft nanoscale groove geometries on zirconia surfaces, with thorough analyses conducted using x-ray diffraction, scanning electron microscopy, atomic force microscopy, and water contact angle measurements. The study evaluated the response of human fetal osteoblastic cell lines to textured zirconia ceramics by assessing alkaline phosphatase activity, collagen I, and interleukin 1β secretion over a 7 day period. Additionally, the antibacterial behavior of the textured surfaces was investigated using Fusobacterium nucleatum, a common culprit in infections associated with dental implants. Ciprofloxacin (CIP), a widely used antibacterial antibiotic, was loaded onto zirconia ceramic surfaces. The results of this study unveiled a substantial reduction in bacterial adhesion on textured zirconia surfaces. The fine biocompatibility of these surfaces was confirmed through the MTT assay and observations of cell morphology. Moreover, the human fetal osteoblastic cell line exhibited extensive spreading and secreted elevated levels of collagen I and interleukin 1β in the modified samples. Drug release evaluations demonstrated sustained CIP release through a diffusion mechanism, showcasing excellent antibacterial activity against pathogenic bacteria, including Streptococcus mutans, Pseudomonas aeruginosa, and Escherichia coli.

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Section: Scanning Electron Microscopymentioning

confidence: 99%

Tailoring zirconia surface topography via femtosecond laser-induced nanoscale features: effects on osteoblast cells and antibacterial properties

Ghalandarzadeh,

Ganjali,

Hosseini

2024

Biomed. Mater.

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“…The PSD is the probability of finding pores of given radii, and this measure is very useful for estimating several parameters, and hence is chosen as our validation method. Studies have shown how effective diffusivity, 51,52 thermal conductivity, 53 permeability, [53][54][55] structural properties, 56 among other properties 53,57 all have intrinsic dependencies on PSD and porosity. The proposed Y-T algorithm by default matches the porosity of the reconstruction to the target, but PSD needs to be validated.…”

Section: Validationmentioning

confidence: 99%

Efficient reconstruction and validation of heterogeneous microstructures for energy applications

Adam

Wang

2022

Intl J of Energy Research

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The digital reconstruction of microstructures is necessary for simulations in fields ranging from geology to electrochemistry, but the state-of-the-art digital reconstruction techniques often compromise between resolution and field of view. It is challenging to retain detailed microstructure information in largescale reconstructions. This study investigates different aspects of the Yeong-Torquato algorithm based on correlation functions to make it more efficient.We achieve this goal by reducing the computational complexity of the chordlength distribution function and the two-point correlation function, applying the random sphere-packing method as the initial condition, and restricting potential voxel swaps to interfaces. In addition, a novel superposition parallel scheme is introduced to aid in searching for potential voxel swaps. The algorithm proposed is validated by comparing the pore-size distributions of reconstructed 3D custom battery electrodes from a sample dataset obtained from transmission X-ray microscopy. From a sample image with 200 Â 200 pixels, the code can reconstruct a 300 Â 300 Â 300 structure in under 22 h and reconstruct a 400 Â 400 Â 400 structure in 43 h with eight cores.

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“…Tauseef‑ur‑ Rehman et al 21 investigated the performance of a high-porosity (97 percent) copper and nickel foam in a PCM-based heat sink (RT-54HC) under various heat loads. Copper foam with a 0.8 volume percentage of PCM was shown to decrease the base temperature by 26% when compared to nickel foam without PCM at 24 W. Lei et al 22 observed the influence of pore size distribution using Voronoi tessellations on thermal conductivity and phase change behavior of hierarchical foams/PCMs composites. Abbasov 23 investigated the rate of heat transfer of open-cellular foam filled with PCM and having 12 solid tubular ribs in each cubic unit.…”

Section: Introductionmentioning

confidence: 99%

Nanoencapsulated phase change material in a trapezoidal prism wall under the magnetic field effect for energy storage purposes

Younis,

Abderrahmane,

Hatami

et al. 2023

Sci Rep

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Recently, Nano-encapsulated phase change materials (NEPCM) have attracted the attention of researchers due to their promising application in thermal management. This research investigates magnetohydrodynamic mixed convection of NEPCM contained within a lid-driven trapezoidal prism enclosure containing a hot-centered elliptical obstacle. The upper cavity wall is moving at a constant velocity; both inclined walls are cold, while the rest of the walls are insulated. The Galerkin Finite Element Method was used to solve the system's governing equations. The influence of Reynolds number (Re 1–500), Hartmann number (Ha = 0–100), NEPCM volumetric fraction φ (0–8%), and elliptical obstacle orientation α (0–3π/4) on thermal fields and flow patterns are introduced and analyzed. The results indicated that the maximum heat transfer rate is observed when the hot elliptic obstacle is oriented at 90°; an increment of 6% in the Nu number is obtained in this orientation compared to other orientations. Reducing Ha from 100 to 0 increased Nu by 14%. The Maximum value of the Bejan number was observed for the case of Ha = 0, α = 90° and φ = 0.08.

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The influence of pore size distribution on thermal conductivity, permeability, and phase change behavior of hierarchical porous materials

Cited by 16 publications

References 73 publications

Tailoring zirconia surface topography via femtosecond laser-induced nanoscale features: effects on osteoblast cells and antibacterial properties

Tailoring zirconia surface topography via femtosecond laser-induced nanoscale features: effects on osteoblast cells and antibacterial properties

Efficient reconstruction and validation of heterogeneous microstructures for energy applications

Nanoencapsulated phase change material in a trapezoidal prism wall under the magnetic field effect for energy storage purposes

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