Morphology, structure and thermal stability of microencapsulated phase change material with copolymer shell

Li, Wei; Song, Guolin; Tang, Guoyi; Chu, Xiangxiang; Ma, Shenghua; Liu, Caifeng

doi:10.1016/j.energy.2010.12.041

Cited by 125 publications

(58 citation statements)

References 18 publications

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“…A survey on literatures shows that most literatures refer to the fabrication of MePCMs with polymer as shell by interfacial polymerization, [31,32] in situ polymerization, [33,34] or suspension-like polymerization. [35,36] The structural characteristic of Pickering emulsion makes it a perfect template for microcapsule with polymer-inorganic hybrid shell. By polymerization or condensation, a layer of polymerinorganic hybrid is formed on droplet surface, making the Pickering droplet to be a microcapsule.…”

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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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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“…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. Li et al [49] microencapsulated n-octadecane with styrene-1,4-butylene glycol diacrylate copolymer (PSB), styrene-divinylbenzene copolymer (PSD), styreneedivinylbenzenee1,4-butylene glycol diacrylate copolymer (PSDB), and polydivinylbenzene (PDVB) shell materials. They then analysed the morphology of the MEPCMs from scanning electron microscope (SEM) images and found the type with PSDB shell to be the best of all the samples.…”

Section: Suspension Polymerizationmentioning

confidence: 99%

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

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

771

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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“…In addition, the residual ZL content measured at 700°C is consistent with the corresponding theoretical ZL content, demonstrating that the ZL particles were successfully incorporated into the PP/OD matrix. The first degradation stage between 130 and 340°C is due to the decomposition of OD near its flash temperature [38,39] or evaporation before the boiling temperature of OD [39,40] while the second degradation stage between 340 and 480°C results from the bond scission and chain transfer reactions of the PP trimers in pure PP [41,42]. With increasing ZL content from 0 to 30%, the decomposition temperature increased from 170.2 to 187.6°C for a 1 wt% decomposition (T d 1% ) and from 308.5 to 399.9°C for a 10 wt% decomposition (T d 10% ), respectively.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Effect of porous zeolite on temperature-dependent physical properties of polypropylene/octadecane (PP/OD) composite films

Kim¹,

Thanakkasaranee²,

Seo³

et al. 2018

Express Polym. Lett.

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Abstract. Polymeric materials with temperature-dependent gas permeabilities using a phase change material are designed and their applicability as a packaging system investigated. Polypropylene/octadecane/zeolite (PP/OD/ZL) composite films were prepared via extrusion process. ZL was used as a filler to enhance the dispersion and interfacial interaction between the OD and the PP originating from different flowabilities during the extrusion process. (FTIR) and (WAXD) analyses showed that the incorporation of ZL increased the interfacial interaction between PP and OD, resultantly enhancing the thermal stability, mechanical properties, and the oxygen transmittance rate and mechanical properties after contact with food simulants and thermal treatment. When the temperature was elevated from 10 to 30°C, oxygen and water vapor transmittance rate of the composite films increased sharply because of the influence of the OD content. It was surmised that temperaturedependent permeation jump caused by increasing of segmental mobility of OD phase and converting the crystalline structure to an amorphous one of OD phase in the composite films. However, the permeation jump in the composite films was weakened as the ZL content increased. These results are related to changes in the interfacial interaction and crystallinity in the composite films due to the addition of ZL.

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Morphology, structure and thermal stability of microencapsulated phase change material with copolymer shell

Cited by 125 publications

References 18 publications

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

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

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

Effect of porous zeolite on temperature-dependent physical properties of polypropylene/octadecane (PP/OD) composite films

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