n-Eicosane-Fe3O4@SiO2@Cu microcapsule phase change material and its improved thermal conductivity and heat transfer performance

Yeon, Jeong; Son, Namgyu; Shin, Jongmin; Chava, Rama Krishna; Joo, Sang Woo; Kang, Misook

doi:10.1016/j.matdes.2020.109357

Cited by 65 publications

(18 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another recent application of polymer-nanoparticles (including magnetic nanoparticles) composite is in thermal pads, designed for a rapid transfer of the heat from electronic devices (e.g., automotive microcontrollers) to the surrounding atmosphere [30,31]. Different strategies were tested to enhance the thermal conductivity of polymer-magnetic nanoparticles composites, such as core-shell structures or other additives in the composite [32][33][34][35][36][37][38][39]. However, the effect of a magnetic field, used to align the magnetic nanoparticles during the polymerization process, on the thermal properties of the composite was less studied [40].…”

Section: Introductionmentioning

confidence: 99%

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

et al. 2021

View full text Add to dashboard Cite

Composites of magnetite (Fe3O4) nanoparticles dispersed in a polydimethylsiloxane (PDMS) matrix were prepared by a molding process. Two types of samples were obtained by free polymerization with randomly dispersed particles and by polymerization in an applied magnetic field. The magnetite nanoparticles were obtained from magnetic micrograins of acicular goethite (α-FeOOH) and spherical hematite (α-Fe2O3), as demonstrated by XRD measurements. The evaluation of morphological and compositional properties of the PDMS:Fe3O4 composites, performed by SEM and EDX, showed that the magnetic particles were uniformly distributed in the polymer matrix. Addition of magnetic dispersions promotes an increase of thermal conductivity compared with pristine PDMS, while further orienting the powders in a magnetic field during the polymerization process induces a decrease of the thermal conductivity compared with the un-oriented samples. The shape of the magnetic dispersions is an important factor, acicular dispersions providing a higher value for thermal conductivity compared with classic commercial powders with almost spherical shapes.

show abstract

Section: Introductionmentioning

confidence: 99%

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The rocking vibration of the CH bond was observed near 1663 cm −1 . It was noteworthy that the absorption peaks at 2921 and 2848 cm −1 correspond to the bonding characteristics of linear alkanes 41 . However, compared with the SiO 2 @n‐octadecane, the absorption peak at this position of the samples obtained by chemical deposition was significantly weakened, which may be due to the influence of CuS cladding or partial leakage of n‐octadecane during chemical deposition.…”

Section: Resultsmentioning

confidence: 97%

Preparation and characterization of novel CuS / SiO ₂ @n‐octadecane phase‐change nanocapsules enhanced photothermal conversion for solar energy utilization

Liu

Liang

Cheng

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary The design of CuS/SiO2@n‐octadecane nanocapsules with high sensitivity to light and heat is being conducive to photothermal conversion and efficient utilization of solar energy. In this work, CuS was deposited on the surface of the SiO2 shell by the chemical bath deposition method. Through the characterization of microstructure and chemical composition, the granular CuS crystal was uniformly coated on the SiO2 shell. The synthesized nanocapsules are spherical and have a perfect core‐shell structure. The quantity, distribution, and size of CuS deposited on the shell can be adjusted by regulating the synthesis parameters. The prepared CuS/SiO2@n‐octadecane nanocapsules have a melting temperature of 26.85°C and melting enthalpy of 65.0 J/g at the optimum preparation condition (10 mmol/L cetyltrimethylammonium bromide, 70°C, 0.02 mol/L Cu2+) and have excellent durability. The light absorption performance of CuS/SiO2 nanocapsules in the Vis‐NIR was significantly enhanced, photothermal conversion efficiency reached 52.7%. In addition, the CuS/SiO2 nanocapsules also showed good photocatalytic performance, and the degradation degree of methyl orange reached 71% within 3 hours. These results show that the designed photo‐driven nanocapsules have excellent performance and great potential in solar energy utilization and intelligent fabric. Highlights We have creatively synthesized PCM nanocapsules with CuS/SiO2 shells. The melting enthalpy and melting temperature are 65.0 J/g and 26.85°C, respectively. The activity of the SiO2 shell was increased by amino coupling agent modification. CuS has increased 4‐5 times of photothermal conversion efficiency in Vis‐NIR.

show abstract

“…The incorporation of nano-SiC (7% nano-SiC) suppressed the supercooling crystallization and improved the thermal transfer properties of the PMF/SiC mPCMs, which is reflected through the increase in thermal conductivity by 60.34%. Do et al (2021) [187] improved the thermal conductivity of mPCMs through encapsulating the n-eicosane (PCM) with high thermal conductive hybrid shell materials, Fe 3 O 4 @SiO 2 @Cu. The n-eicosane-Fe 3 O 4 @SiO 2 @Cu microcapsule has an excellent heat transfer ability owing to its high thermal conductivity, where the effective thermal conductivity of pure n-eicosane increases from 0.4716 to 1.3926 W/(m•K) when it is encapsulated with Fe 3 O 4 @SiO 2 @Cu shell.…”

Section: Heat Transfer Enhancementmentioning

confidence: 99%

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

Al‐Shannaq

Farid

Ikutegbe

2022

Micro

View full text Add to dashboard Cite

Thermal energy storage (TES) has been identified by many researchers as one of the cost-effective solutions for not only storing excess or/wasted energy, but also improving systems’ reliability and thermal efficiency. Among TES, phase change materials (PCMs) are gaining more attention due to their ability to store a reasonably large quantity of heat within small temperature differences. Encapsulation is the cornerstone in expanding the applicability of the PCMs. Microencapsulation is a proven, viable method for containment and retention of PCMs in tiny shells. Currently, there are numerous methods available for synthesis of mPCMs, each of which has its own advantages and limitations. This review aims to discuss, up to date, the different manufacturing approaches to preparing PCM microcapsules (mPCMs). The review also highlights the different potential approaches used for the enhancement of their thermophysical properties, including heat transfer enhancement, supercooling suppression, and shell mechanical strength. This article will help researchers and end users to better understand the current microencapsulation technologies and provide critical guidance for selecting the proper synthesis method and materials based on the required final product specifications.

show abstract

n-Eicosane-Fe3O4@SiO2@Cu microcapsule phase change material and its improved thermal conductivity and heat transfer performance

Cited by 65 publications

References 52 publications

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

Preparation and characterization of novel CuS / SiO ₂ @n‐octadecane phase‐change nanocapsules enhanced photothermal conversion for solar energy utilization

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

Contact Info

Product

Resources

About

n-Eicosane-Fe3O4@SiO2@Cu microcapsule phase change material and its improved thermal conductivity and heat transfer performance

Cited by 65 publications

References 52 publications

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

Influences of Dispersions’ Shapes and Processing in Magnetic Field on Thermal Conductibility of PDMS–Fe3O4 Composites

Preparation and characterization of novel CuS / SiO 2 @n‐octadecane phase‐change nanocapsules enhanced photothermal conversion for solar energy utilization

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

Contact Info

Product

Resources

About

Preparation and characterization of novel CuS / SiO ₂ @n‐octadecane phase‐change nanocapsules enhanced photothermal conversion for solar energy utilization