Novel stearic acid/graphene core–shell composite microcapsule as a phase change material exhibiting high shape stability and performance

Dao, Trung Dung; Jeong, Han Mo

doi:10.1016/j.solmat.2015.02.009

Cited by 84 publications

(16 citation statements)

References 40 publications

(48 reference statements)

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“…These results indicated that microcapsules modules possessed excellent temperature regulated properties, as the core PCMs can store and release amounts of latent heat energy through phase change in a narrow temperature range [39,40]. For that reason, buffering a temperature variation by PCMs through heat storage and release has been considered as one of the most effective ways to control heat dissipation [41].…”

Section: Temperature-regulated Propertymentioning

confidence: 96%

Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

et al. 2016

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Section: Temperature-regulated Propertymentioning

confidence: 96%

Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

et al. 2016

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“…The graphene material family, such as graphene nanoparticles and graphene nanoplatelets (GNPs) has been introduced into the PCMs. Dao et al used a latex technology to encapsulate SA into graphene to form a core‐shell composite PCM. The thermal conductivity of the composite PCM represents a 163% increase compared to that of SA.…”

Section: Heat Transfer Enhancement Of Solid–liquid Pcmsmentioning

confidence: 99%

Latent Heat Thermal Energy Storage Systems with Solid–Liquid Phase Change Materials: A Review

Zhang¹,

Yuan²,

Cao³

et al. 2018

Adv Eng Mater

365

108

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This paper provides a review of the solid-liquid phase change materials (PCMs) for latent heat thermal energy storage (LHTES). The commonly used solid-liquid PCMs and their thermal properties are summarized here firstly. Two major drawbacks that seriously limit the application of PCMs in an LHTES system, that is, low thermal conductivity and liquid leakage, are discussed. Various methods for enhancing the thermal conductivity and heat transfer of solid-liquid PCMs are explained. Previous studies regarding formstable composite PCMs and microencapsulated PCMs are also presented. Furthermore, applications of the solid-liquid PCMs used in LHTES and thermal management systems are introduced and analyzed. Finally, future outlooks and research topics are proposed.

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“…Carbon‐based materials, including porous EG, multihole graphite oxide, multiwalled carbon nanotubes (MWCNTs), and graphite sheets, are the most promising candidates and widely employed as matrices or high‐thermal‐conductivity additives to enhance the heat transfer of PCMs and prevent the leakage of liquid PCMs because of favorable thermal conductivity, low density, excellent chemical stability, and good compatibility with PCMs . In a typical example, Wu et al.…”

Section: Introductionmentioning

confidence: 99%

“…As a derivative of graphite, graphene not only possesses the excellent conductivity of carbon materials, but also has additional features, including large specific surface area, ability to form ultrathin layers, extraordinary mechanical strength, and an ultrahigh aspect ratio, which means it can also be used as a functional shell in preparing core–shell MEPPCMs. For example, Dao and Jeong fabricated SA/graphene microcapsules with a high weight fraction of PCMs and improved the thermal conductivity by using a latex mixing method of electrostatic interactions . From previous reports, it is easily concluded that the porous rigid framework can significantly improve the properties of PCMs.…”

Section: Introductionmentioning

confidence: 99%

“…[29] Carbon-based materials,i ncluding porous EG,m ultihole graphite oxide,m ultiwalled carbonn anotubes (MWCNTs), and graphite sheets,a re the most promising candidates and widely employed as matrices or high-thermal-conductivity additives to enhance the heat transfer of PCMsa nd prevent the leakage of liquid PCMs because of favorable thermal conductivity, low density,e xcellent chemical stability,a nd good compatibility with PCMs. [7,26,[30][31][32] In at ypicale xample, Wu et al developed an ew methodt op repare form-stable EG/stearic acid (SA) composite PCMs by impregnation of liquid PCMs into the EG matrixa nd then compressing the composite into stable blocks. [26] Ther esults showed that the thermal conductivity of the block, both axial and radial, could be enhanced significantly by using the EG additive, and the radial thermal conductivity was as high as 23.27 Wm À1 K À1 ,w hich was about 130 times higher than that of the pure PCM.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Graphene Oxide‐Grafted Hexadecanol Composite Phase‐Change Material for Thermal Energy Storage

Wang

Zhang

2017

Energy Tech

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With the aim of improving the shape stability and recycling reliability of hexadecanol (HD), graphene oxide (GO)‐grafted hexadecanol (GO‐g‐HD) shape‐stabilized phase‐change material (SSPCM) with good thermochemical properties was prepared by oxidizing graphite powders to form GO, which was converted into the acyl chloride and finally condensed with HD. Various characterization techniques were employed to investigate the microstructure, thermal properties, thermal durability, and reliability of the composite. The results show that HD was embedded in the composite with a maximum mass fraction of 62.7 wt % through physical adsorption and covalent bonding. The grafted percentage and density of HD on ultrathin GO sheets are 36.5 wt % and 1.51 mmol g−1, respectively. The GO‐g‐HD SSPCM melts at 49.7 °C with a latent heat of 152.3 J g−1, and freezes at 45.4 °C with a phase‐change enthalpy of 129.9 J g−1. The thermal conductivity of GO‐g‐HD is measured as 0.519 W m−1 K−1, which is an improvement of 41.8 % compared with that of neat HD. Moreover, the as‐prepared composite also presents excellent chemical and thermal stability, excellent thermal durability, negligible variation in latent heats, and no changes in the phase‐change temperatures due to strong covalent bonds and interactions between the matrix and HD. Thus, GO‐g‐HD is a promising candidate for thermal energy storage in the future because of the very good latent heat, enhanced conductivity, and stability.

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Novel stearic acid/graphene core–shell composite microcapsule as a phase change material exhibiting high shape stability and performance

Cited by 84 publications

References 40 publications

Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

Latent Heat Thermal Energy Storage Systems with Solid–Liquid Phase Change Materials: A Review

Preparation and Characterization of Graphene Oxide‐Grafted Hexadecanol Composite Phase‐Change Material for Thermal Energy Storage

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