Polyurethane foam containing microencapsulated phase-change materials with styrene–divinybenzene co-polymer shells

You, Min; Zhang, Xingxiang; Wang, Jianping; Wang, Xuechen

doi:10.1007/s10853-009-3418-7

Cited by 105 publications

(41 citation statements)

References 11 publications

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“…It also revealed that it is difficult to achieve encapsulation when core/shell mass ratio is greater than 2.00. You et al [47,48] produced n-Octadecane microcapsules with a styrene (St)-divinybenzene (DVB) copolymer shell and achieved an average diameter of 80μm and latent heat fusion capacity of 126kJ/kg. Thermogravimetric (TG) analysis of the St-DVB shell showed the initial weight-loss temperatures to be above 230 o C thus making it better than MF shell.…”

Section: Suspension Polymerizationmentioning

confidence: 99%

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

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

738

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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Section: Suspension Polymerizationmentioning

confidence: 99%

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

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

738

267

View full text Add to dashboard Cite

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“…It has been found that an appropriate amount of various PCMs or microencapsulated PCMs in a combined product enhances the thermal energy storage capacity [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Foamy phase change materials based on linear low-density polyethylene and paraffin wax blends

et al. 2018

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Foamy phase-change materials (FPCMs) based on linear low-density polyethylene (LLDPE) blended with 30 wt.% of paraffin wax (W) were successfully prepared for the first time. The advantage of these materials is their double functionality. First, they serve as standard thermal insulators, and second, the paraffin wax acts as a phase change component that absorbs thermal energy (the latent heat) during melting if the temperature increases above its melting point, which ensures better heat protection of buildings, for instance, against overheating. The density of the porous fabricated FPCM was 0.2898 g/cm 3 with pore content 69 vol.% and gel portion achieved 27.5 wt.%. The thermal conductivity of the LLDPE/W foam was 0.09 W/m.K, whereas the thermal conductivity of the neat LLDPE foam prepared under the same conditions was 0.06 W/m.K, which caused a higher porosity of approximately 92 vol.%. The FPCM absorbed or released approximately 22-23 J/g during melting or cooling, respectively, and the material was stable under thermal and mechanical cycling.

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“…The technology of microencapsulation of PCMs (microPCMs) has supplied a proper way to enlarge the utility fields of the PCMs with advantages, including protecting the PCM against the influences of the outside environment, increasing the heat transfer area, and withstand changes in volume [6]. MicroPCMs has the particle size from less than 1 μm to more than 1,000 μm [7][8][9][10]. A survey of literature shows that a number of studies have been carried out on microPCMs using different inorganics, natural or synthetic polymers as microcapsule shell materials.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of microPCMs-filled epoxy matrix composites

Wang

Huang

et al. 2011

Colloid Polym Sci

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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.

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Polyurethane foam containing microencapsulated phase-change materials with styrene–divinybenzene co-polymer shells

Cited by 105 publications

References 11 publications

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

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

Foamy phase change materials based on linear low-density polyethylene and paraffin wax blends

Thermal conductivity of microPCMs-filled epoxy matrix composites

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