Micro/nano-encapsulated n-heptadecane with polystyrene shell for latent heat thermal energy storage

Sarı, Ahmet; Alkan, Cemil; Döğüşcü, Derya Kahraman; Biçer, Alper

doi:10.1016/j.solmat.2014.03.023

Cited by 150 publications

(53 citation statements)

References 56 publications

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“…This technique demonstrates utility in the creation of PS shells with cross‐linking agents, such as divinyl benzene, and a large variety of PCMs. The unique hydrophilic nature of poly(ethylene glycol) (PEG) inhibits its encapsulation through this method …”

Section: Polymers In Phase Change Materialsmentioning

confidence: 99%

Advanced Polymers for Reduced Energy Consumption in Architecture

Heifferon

Long

2018

Macromol. Rapid Commun.

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In an effort to slow the progress of climate change, the current scientific community has focused on the reduction of greenhouse gases in order to limit the global average temperature inflation to less than 2 °C. The improvement of thermally controlled construction materials can potentially result in lower energy homes/reduced emissions, and lowering the thermal conductivity of insulation materials improves home energy efficiency. Nanoporous insulation foams impart a drastic decrease in thermal conductivity but many polymer properties must be assessed to produce these materials. Passive phase‐change materials also represent another key energy‐saving device to control heat flux within a living space. Research into unique polymeric systems provides a novel means of encapsulation or creating polymeric cross‐linked matrices to prevent leakage and improve mechanical robustness. These two areas of polymer research in architecture represent key advancements for construction materials aimed toward energy savings and energy‐related emissions control.

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Section: Polymers In Phase Change Materialsmentioning

confidence: 99%

Advanced Polymers for Reduced Energy Consumption in Architecture

Heifferon

Long

2018

Macromol. Rapid Commun.

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“…PCMs are good at storing or releasing high amounts of heat at an almost isothermal temperature during the solid–liquid or liquid–solid phase‐transition processes . PCMs can be categorized into two main groups: inorganic PCMs comprise materials with large latent heats, such as salt hydrates and metals, whereas organic PCMs include paraffins, fatty acids, and their mixtures .…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of paraffin microcapsules for energy‐saving applications

Mert

Gumus

2019

J of Applied Polymer Sci

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A series of microencapsulated phase‐change materials (PCMs) with styrene–divinyl benzene shells composed of an n‐octadecane (OD or C18)–n‐hexadecane (HD or C16) mixture as the core were synthesized by an emulsion polymerization method. The effects of the core/shell ratio (C/S) and surfactant concentration (Csurf) on the thermal properties and encapsulation ratios of the PCMs were investigated. The chemical structures and morphological properties of the microcapsules were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy analysis, respectively. The characteristic peaks of the paraffin mixtures and shell material located in the FTIR spectrum of the microencapsulated PCMs proved that the encapsulation of the PCM mixture was performed successfully. The thermal properties of the paraffin microcapsules were determined by differential scanning calorimetry (DSC) and thermogravimetric analysis. DSC analysis demonstrated that the microcapsules containing the maximum amount of paraffin mixture (C/S = 2:1) and the minimum Csurf (45 mmol/L) had the highest latent heat value of 88 kJ/kg and a latent heat of temperature of 21.06°C. Moreover, the maximum encapsulation ratio of the paraffin mixture was found to be 56.77%. With respect to the analysis results, the encapsulated binary mixture, which consisted of OD–HD with a poly(styrene‐co‐divinyl benzene) shell, is a promising material for thermal energy storage applications operating at low temperatures, such as in the thermal control of indoor temperatures and air‐conditioning applications in buildings for desirable thermal comfort and energy conservation. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47874.

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“…They have large latent heat capacity, negligible supercooling, low vapour pressure, good thermal and chemical stability, selfnucleating behaviour, high latent heat of fusion and wide range of solid-liquid phase change temperatures for many latent heat energy storage applications [5,6]. However, they have some drawbacks such as low thermal conductivity, flammability and high volume change during phase change [7,8]. To overcome these drawbacks, microencapsulation can be an efficient tool.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome these drawbacks, microencapsulation can be an efficient tool. By this way the heat transfer surface area can be increased, the volume change problem can be eliminated, leakage of PCM during its phase changing from solid to liquid can be prevented, moreover, the reactivity of PCM with its close environment might be lessened [7]. The microencapsulated PCMs, suspended in a heat transfer fluid phase, form heat storing solid-liquid slurry [8].…”

Section: Introductionmentioning

confidence: 99%

Consolidated microcapsules with double alginate shell containing paraffin for latent heat storage

Németh

Tóth

et al. 2015

Solar Energy Materials and Solar Cells

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Double-shell alginate microcapsules containing paraffin phase change material (PCM) were prepared for latent heat storage by a method of repeated interfacial coacervation/crosslinking.The proposed process consisted of three main steps: (1) preparation of paraffin containing core particles by dripping an O/W emulsion of melted paraffin and aqueous sodium alginate into a calcium chloride ionic cross-linking solution, (2) encapsulation of the core particles into double alginate shell by ionic gelation/crosslinking by repeated interactions between the sodium alginate and calcium chloride solutions, and (3) consolidation of the capsule shells by contact heat treatment. The effects of process parameters such as the sodium alginate concentration, the calcium chloride concentration in certain stages of the process, and the contact time between the formed core particles and the surrounding alginate solution on the paraffin content and the mean diameter of capsules were studied by experimental design and statistical evaluations. The prepared PCM capsules had uniform sizes, core/shell structure, double-walled non-porous alginate coating, tunable void space inside the core, and suitably high paraffin content at properly selected process conditions, corresponding to 95.0 J/g melting and 91.7 J/g freezing latent heat capacity. Thermogravimetric analysis and repeated thermal cycling evidenced good thermal stability, and proper mechanical strength for leakage free microcapsules.

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Micro/nano-encapsulated n-heptadecane with polystyrene shell for latent heat thermal energy storage

Cited by 150 publications

References 56 publications

Advanced Polymers for Reduced Energy Consumption in Architecture

Advanced Polymers for Reduced Energy Consumption in Architecture

Preparation and characterization of paraffin microcapsules for energy‐saving applications

Consolidated microcapsules with double alginate shell containing paraffin for latent heat storage

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