Preparation, characterization and thermal properties of PMMA/n-heptadecane microcapsules as novel solid–liquid microPCM for thermal energy storage

Sarı, Ahmet; Alkan, Cemil; Karaipekli, Ali

doi:10.1016/j.apenergy.2009.10.011

Cited by 289 publications

(114 citation statements)

References 41 publications

(45 reference statements)

Supporting

Mentioning

108

Contrasting

Unclassified

Order By: Relevance

“…DSC thermograms of encap- sulated OD in PDVB capsules (Figure 7) showed that the H m (153.0 J/g-OD) and H c (151.8 J/g-OD) of encapsulated OD were lower than those of the bulk OD (241.7 and 247.0 J/g of H m 0 and H c 0 , respectively). This phenomenon is quite general for the encapsulation as also observed by other researchers [3,5,6,[9][10][11][15][16][17][18][19]. The possible reason of the reduction of H m and H c of encapsulated heat storage materials is that the phase separation between the polymer shell and heat storage material core was incomplete as in the case of PDVB/HD microcapsules prepared by suspension polymerization [11].…”

Section: Resultssupporting

confidence: 53%

Preparation of polydivinylbenzene/natural rubber capsule encapsulating octadecane: Influence of natural rubber molecular weight and content

Chaiyasat¹,

Waree²,

Songkhamrod

et al. 2012

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. The encapsulation of octadecane (OD) as heat storage material was studied. The core-shell polydivinylbenzene (PDVB)/natural rubber (NR) capsules encapsulating OD was prepared using the Self-assembling of Phase Separated Polymer (SaPSeP) method by suspension polymerization. The mixture of dispersed phase consisting of DVB, NR, OD and benzoyl peroxide was added in polyvinyl alcohol aqueous solution and then homogenized at 5,000 rpm for 5 minutes. The obtained monomer droplet emulsion was subsequently polymerized at 80°C for 8 hours resulting in PDVB/NR capsule encapsulating OD. The influence of molecular weight and content of NR on the encapsulation efficiency and thermal properties of the encapsulated OD were investigated. It was found that both factors affected on the preparation of PDVB/ NR/OD capsule. High molecular weight NR restricted phase separation of formed PDVB. High NR content also reduced phase separation of PDVB due to the increase of internal viscosity. Then, only the incorporation of appropriate molecular weight and content of NR resulted in the formation of PDVB/NR/OD capsule.

show abstract

Section: Resultssupporting

confidence: 53%

Preparation of polydivinylbenzene/natural rubber capsule encapsulating octadecane: Influence of natural rubber molecular weight and content

Chaiyasat¹,

Waree²,

Songkhamrod

et al. 2012

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…MicroPCMs have been widely applied in solid matrix as smart temperatureregulation composites, such as fibers, construction materials, and functional packaging materials [11][12][13]. The core materials in microPCMs are usually organic solid-liquid materials such as paraffin (C n H 2n+2 ) and fatty acids (CH 3 (CH 2 ) 2n COOH) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of microPCMs-filled epoxy matrix composites

Wang

Huang

et al. 2011

Colloid Polym Sci

View full text Add to dashboard Cite

Microencapsulated phase change materials (microPCMs) have been widely applied in solid matrix as thermal-storage or temperature-controlling functional composites. The thermal conductivity of these microPCMs/ matrix composites is an important property need to be considered. In this study, a series of microPCMs have been fabricated using the in situ polymerization with various core/shell ratio and average diameter; the thermal conductivity of microPCMs/epoxy composites were investigated in details. The results show that the microPCMs have smooth surface and regular global shape with compact methanolmelamine-formaldehyde shell. The shell thickness does not greatly influence the phase change behaviors of PCM. Moreover, smaller microPCMs embedded in epoxy can improve the thermal transmission ability of composites. The effect of thermal conductivity of composites can be improved with higher volume fraction (10-30%) of microPCMs; and smaller size microPCMs with the same content of PCM may also enhance the thermal transmission area in matrix. Modeling analysis of relative thermal conductivity indicates that mixing higher thermal conductivity additive in PCM or matrix is an appropriate method to improve the thermal conductivity of microPCMs/matrix composites.

show abstract

“…Alkan et al [55] further coated PMMA shell material containing capsules of average diameter 0.70 μm with 35wt% of n-Eicosane. Sari et al [56,57] also produced smaller sizes of NEPCM ranging from 0.14-0.40μm with 43wt% of n-Ocataedcane and 38wt% n-Heptadecane as core materials and at a stirring speed of 2000 rpm. Ma et al [58] produced higher core material content MEPCM which the core material content to be 61.2wt% and its latent heat capacity as much as 101kJ/kg.…”

Section: Emulsion/miniemulsion Polymerizationmentioning

confidence: 99%

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

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

693

251

View full text Add to dashboard Cite

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.

show abstract

Preparation, characterization and thermal properties of PMMA/n-heptadecane microcapsules as novel solid–liquid microPCM for thermal energy storage

Cited by 289 publications

References 41 publications

Preparation of polydivinylbenzene/natural rubber capsule encapsulating octadecane: Influence of natural rubber molecular weight and content

Preparation of polydivinylbenzene/natural rubber capsule encapsulating octadecane: Influence of natural rubber molecular weight and content

Thermal conductivity of microPCMs-filled epoxy matrix composites

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

Contact Info

Product

Resources

About