Carpathian Diatomites and Their Applications in Phase-Change Composites DOI Open Access
Agnieszka Pękala, Michał Musiał, Lech Lichołai

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 2097 - 2097

Published: May 2, 2025

Based on a review of the existing literature use diatomite and functioning phase-change heat accumulators, in this study, we conducted empirical research creation composite based Carpathian diatomite. As part our mineralogical research, determined phase composition diatomites work. Their internal nanostructure was identified. Nanopores create regular systems that, depending variety diatoms, may have sieve, tubular, or “honeycomb” shapes. Diatomites’ structure benefits absorption capacity materials (PCM). The obtained calorimetric thermograms organic material compound highlighted an extension temperature range which transformation occurs from 4–5 °C (for pure PCM RT28HC) to 15–17 for composites tested with weight proportions 1:1 4:6. In case water-rich varieties, presence mixed-package minerals, i.e., montmorillonite, its small size specific 2:1 package structure, can hinder penetration accumulation PCM. ability bind accumulate will be influenced by particles relative pores, structural textural features.

Language: Английский

Fabrication and Properties of a Thermal Conduction‐Enhanced SiO2–Ag Double‐Shell Nanoencapsulated Lauric Acid Phase Change Material DOI

Tonghe Li,

Siyu Hao,

Huanmei Yuan

et al.

Energy Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

To significantly improve the thermal conductivity of nanocapsule shells, lauric acid (LA)/SiO 2 –Ag composite shell phase change nanocapsules are synthesized via sol–gel and chemical reduction methods. Three types with varying Ag thicknesses obtained, showing particle sizes 946–982 nm, latent heat 21.59–59.81 J g −1 , volume encapsulation ratio () 63.78–86.96%. After 1000 cycles, decay is only 1.87%, indicating good reliability. Specifically, a detailed porosity correction performed, corrected effective LA/SiO 22.11–80.04 W (m K) that improved. Furthermore, 1D unsteady‐state conduction device tested transfer performance stacked nanocapsules. The results demonstrate exhibit faster rate than nanocapsules, reducing time by 108.1%. simulation further reveal facilitates interfacial in allowing to propagate rapidly from bottom top. Additionally, for single high promotes uniform inward transfer, expediting transition enhancing performance.

Language: Английский

Citations

0
Carpathian Diatomites and Their Applications in Phase-Change Composites DOI Open Access
Agnieszka Pękala, Michał Musiał, Lech Lichołai

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 2097 - 2097

Published: May 2, 2025

Based on a review of the existing literature use diatomite and functioning phase-change heat accumulators, in this study, we conducted empirical research creation composite based Carpathian diatomite. As part our mineralogical research, determined phase composition diatomites work. Their internal nanostructure was identified. Nanopores create regular systems that, depending variety diatoms, may have sieve, tubular, or “honeycomb” shapes. Diatomites’ structure benefits absorption capacity materials (PCM). The obtained calorimetric thermograms organic material compound highlighted an extension temperature range which transformation occurs from 4–5 °C (for pure PCM RT28HC) to 15–17 for composites tested with weight proportions 1:1 4:6. In case water-rich varieties, presence mixed-package minerals, i.e., montmorillonite, its small size specific 2:1 package structure, can hinder penetration accumulation PCM. ability bind accumulate will be influenced by particles relative pores, structural textural features.

Language: Английский

Citations

0