Fabrication and characterization of microencapsulated phase change material with low supercooling for thermal energy storage

Tang, Xiaopeng; Li, Wei; Shi, Haifeng

doi:10.1016/j.energy.2014.03.002

Cited by 82 publications

(33 citation statements)

References 43 publications

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“…n-octadecyl methacrylate (ODMA) + methacrylic acid (copolymer)/n-octadecane 1.60-1.68 [43] n-butyl methacrylate(BMA) + n-butyl acrylate(BA) /n-octadecane 0.3-28 [21] Silica/capric-stearic acid mix 1.0-10 [44] Robust microencapsulated PCMs in concrete mixes B. Beyhan et al n-octadecyl methacrylate (ODMA) + methacrylic acid (copolymer)/n-octadecane 1.60-1.68 [43] n-butyl methacrylate(BMA) + n-butyl acrylate(BA) /n-octadecane 0.3-28 [21] Silica/capric-stearic acid mix 1.0-10 [44] Robust microencapsulated PCMs in concrete mixes B. Beyhan et al…”

Section: Discussionmentioning

confidence: 99%

Robust microencapsulated phase change materials in concrete mixes for sustainable buildings

Beyhan

Cellat

Konuklu

et al. 2016

Int. J. Energy Res.

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Summary For passive building applications, phase change materials (PCMs) are microencapsulated to avoid leakage of PCM from concrete structure. The primary challenge of using microencapsulated PCM (MPCM) is its weak shell structure. New MPCMs with different shell compositions to prevent breakage during mixing in fresh concrete are needed. In this study, free radical polymerization method to microencapsulate capric acid–myristic acid mixture as PCM with two different methyl methacrylate co‐polymers is proposed to produce robust MPCMs for building applications. Two new microcapsules (MPCM‐1 and MPCM‐2) having latent heats of 91.9 and 97.3 J/g were synthesized. SEM analyses showed the size of microcapsules being in the range of 400–850 nm for MPCM‐1 and 250–475 nm for MPCM‐2. Analyses also reveal that the shells of MPCMs were not harmed, as they were added into concrete mixes. The microsphere's geometry was preserved, and distribution was homogeneous. The MPCMs were also studied under thermal tests of 1000 heating/cooling cycles. No significant changes in thermal properties were observed after thermal cycling tests. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

Robust microencapsulated phase change materials in concrete mixes for sustainable buildings

Beyhan

Cellat

Konuklu

et al. 2016

Int. J. Energy Res.

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“…[1][2][3] Processes related to interfacial phenomena are major procedures for carrying out microencapsulation, including complex coacervation, [4] layerby-layer addition, [5,6] deposition of polymer by solvent evaporation, [7] and interfacial polymerization. [8][9][10] Pickering emulsions are stabilized by adsorbed solid particles instead of emulsifier.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and performance of microencapsulated phase change materials with hybrid shell by in situ polymerization in Pickering emulsion

Yin

Líu²,

et al. 2015

Polymers for Advanced Techs

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a Microencapsulated phase change materials (MePCMs) using melamine-formaldehyde resin/SiO 2 as shell were investigated in this paper. Organically modified SiO 2 particles were employed to stabilize Pickering emulsion, and in situ polymerization of melamine and formaldehyde was carried out to form hybrid shell. The performances of resultant MePCMs with hybrid shell were investigated comparatively with the MePCMs with polymer shell. SiO 2 particles raise the microencapsulation efficiency by improving the stability of emulsion and providing a precipitation site for melamine-formaldehyde resin. Also, the mechanical strength, thermal reliability, and anti-osmosis performance of MePCMs were improved significantly by SiO 2 particles in the shell. Our study shows that Pickering emulsion is a simple and robust template for MePCMs with polymer-inorganic hybrid shell.

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“…However, with the addition of n ‐alkanol, the microencapsulation ratio was reduced; meanwhile, the microcapsules coagulated with each other. Tang et al . used n ‐octadecyl methacrylate–methacrylic acid as the copolymer shell, and the supercooling degree of these prepared n ‐octadecane micro‐PCMs was only about 4°C, but the low microencapsulation ratio limits their application in buildings.…”

Section: Introductionmentioning

confidence: 99%

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

Yan

Xie

Wang

2019

J of Applied Polymer Sci

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A series of microencapsulated phase‐change materials (micro‐PCMs) with binary cores and acrylate‐based copolymer shells were prepared. The micro‐PCMs contained octadecane and butyl stearate as binary‐core materials. Allyl methacrylate, ethylene glycol dimethacrylate, 1,4‐butanediol diacrylate (BDDA), and 1,6‐hexanediol dimethacrylate were respectively introduced to copolymerize with divinylbenzene (DVB) to form different microcapsule shells. In this work, the influence of the types of core and shell materials and core–shell weight ratios on the thermal properties of micro‐PCMs was studied. The chemical structures, morphologies, thermal properties, and thermal insulation properties of the wallboards were all tested and discussed. Scanning electron microscope photographs show that these micro‐PCMs have relatively spherical profiles and compact surfaces with diameters ranging from 10 to 80 μm. Differential scanning calorimetry results indicated that their microencapsulation efficiency ranged from 48 wt % to 80 wt %. A thermogravimetric analysis demonstrated that these micro‐PCMs can ensure their thermal stability below 210°C. Finally, a thermal insulation wallboard fabricated with synthesized P(BDDA‐co‐DVB) micro‐PCMs showed excellent thermal energy storage performance, keeping the temperature fluctuation within 2.5°C. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47777.

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Fabrication and characterization of microencapsulated phase change material with low supercooling for thermal energy storage

Cited by 82 publications

References 43 publications

Robust microencapsulated phase change materials in concrete mixes for sustainable buildings

Robust microencapsulated phase change materials in concrete mixes for sustainable buildings

Fabrication and performance of microencapsulated phase change materials with hybrid shell by in situ polymerization in Pickering emulsion

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

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