Phase Change Materials (PCM) microcapsules with different shell compositions: Preparation, characterization and thermal stability

Bayés‐García, Laura; Ventolà, L.; Cordobilla, Raquel; Benages, R.; Calvet, Teresa; Cuevas‐Diarte, M. A.

doi:10.1016/j.solmat.2010.03.014

Cited by 202 publications

(81 citation statements)

References 27 publications

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“…One of the main advantages of the PCFC is that it allows important flammability parameters, such as the heat release rate (W/g), to be obtained from small specimens. The PCM started to decompose at around 100ºC and reached a PHRR of 186 W/g at 208ºC, which is in good agreement with the flash point temperature of 146ºC specified by the PCM manufacturer as well as with the decomposition temperatures obtained from the thermogravimetric analysis reported by Bayes-Garcia et al [34]. As expected, the PHRR was reduced when the PCM was mixed with mortar, with values of 50W/g and 15W/g for the samples with 25% and 10% PCM, respectively.…”

Section: Pyrolysis Combustion Flow Calorimeter (Pcfc)supporting

confidence: 90%

Fire behaviour of a mortar with different mass fractions of phase change material for use in radiant floor systems

Ibarra

Mazo

Delgado

et al. 2014

Energy and Buildings

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(Laia Haurie), jmazo@unizar.es (Javier Mazo), monica@unizar.es (Mónica Delgado), bzalba@unizar.es (Belén Zalba). AbstractThe present work focuses on the reaction to fire of a cement mortar containing Phase Change Material (PCM), which is embedded in a lightweight aggregate, for buildings. Several samples containing different PCM mass fractions have been prepared and tested in order to study the influence of the quantity of PCM on fire behaviour. The enthalpy-temperature of the PCM curve has been measured using the T-history method, and the effect of the PCM on the thermal behaviour of the cement mortar material has been studied using an experimental setup. With the aim of characterising the reaction of the composite material to fire, various small scale laboratory tests have been carried out, paying special attention to the production of burning drops during combustion, smoke release and flame persistence. Nomenclature FoFourier number HDPE High-density polyethylene

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Section: Pyrolysis Combustion Flow Calorimeter (Pcfc)supporting

confidence: 90%

Fire behaviour of a mortar with different mass fractions of phase change material for use in radiant floor systems

Ibarra

Mazo

Delgado

et al. 2014

Energy and Buildings

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“…They also demonstrated that microencapsulation efficiency is dependent upon the process parameters such as core material ratio, emulsifying time and the amount of cross-linking agent. Bayes-Garcia [69] successfully produced Rubitherm® RT 27 microcapsules from two different coacervates; Sterilized Gelatine/Arabic Gum for the SG/AG method and Agar-Agar/Arabic Gum for the AA/AG method. According to the particle sizing analysis the average diameter of the capsules produced with the SG/AG method was 12μm whereas the AA/AG method achieved far smaller size of 104nm.…”

Section: Complex Coacervationmentioning

confidence: 99%

Review of solid–liquid phase change materials and their encapsulation technologies

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

777

267

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Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition, they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles was identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs. Abstract: Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles were identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs.

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“…Most of the literatures indicated that both organic polymers and inorganic materials could be employed as shell materials to encapsulate PCMs through chemical processes; such as suspension polymerization [14], interfacial polycondensation [15], in situ polycondensation [16], in situ precipitation [17] and other special in situ processes [18]. These shell materials covered polyurea-formaldehyde resin [19], melamineformaldehyde resin, poly(methyl methacrylate) (PMMA) [20], polystyrene [21], CaCO 3 [22], SiO 2 [23], TiO 2 [24], Al 2 O 3 [25], and so more.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Novel Nanoencapsulated n-Eicosane Phase Change Material with Inorganic Silica Shell Material for Enhanced Thermal Properties through Sol-Gel Route

H.G¹,

Zhang²,

Qufu³

2017

J Textile Sci Eng

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Phase Change Materials (PCM) microcapsules with different shell compositions: Preparation, characterization and thermal stability

Cited by 202 publications

References 27 publications

Fire behaviour of a mortar with different mass fractions of phase change material for use in radiant floor systems

Fire behaviour of a mortar with different mass fractions of phase change material for use in radiant floor systems

Review of solid–liquid phase change materials and their encapsulation technologies

Synthesis of a Novel Nanoencapsulated n-Eicosane Phase Change Material with Inorganic Silica Shell Material for Enhanced Thermal Properties through Sol-Gel Route

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