Comparison of LDPE, LLDPE and HDPE as matrices for phase change materials based on a soft Fischer–Tropsch paraffin wax

Molefi, J. A.; Luyt, A. S.; Krupa, Igor

doi:10.1016/j.tca.2010.01.002

Cited by 91 publications

(59 citation statements)

References 20 publications

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“…The introduction of phase change material (PCM) in polymer matrix is one possible approach to minimize the negative effects of unwanted temperature changes [6,10]. PCMs are temperature-responsive substances that store and release significant latent heat energy during temperature-driven phase changes [6,9,[11][12][13]. Among PCMs, paraffin wax (PW) has attracted great attention for its high latent heat, congruent melting/freezing temperature, minimal supercooling, nontoxicity, and availability [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…PCMs are temperature-responsive substances that store and release significant latent heat energy during temperature-driven phase changes [6,9,[11][12][13]. Among PCMs, paraffin wax (PW) has attracted great attention for its high latent heat, congruent melting/freezing temperature, minimal supercooling, nontoxicity, and availability [11][12][13][14]. However, the direct utilization of PW for heat storage is limited due to its low thermal conductivity and leakage during the solid-liquid phase change process [13].…”

Section: Introductionmentioning

confidence: 99%

“…However, the direct utilization of PW for heat storage is limited due to its low thermal conductivity and leakage during the solid-liquid phase change process [13]. To ensure the stable and longterm thermal performance of PW in various applications, it is typically used in bulk form, such as steel and plastic containers [11], the encapsulation of PCM in shell materials [12,13], and polymer/PCM composites [11,12,14].…”

Section: Introductionmentioning

confidence: 99%

“…Such materials are easily shaped, and the polymeric phase provides its own specific properties. Several studies have been performed using the superior thermal energy storage capability of PW, including blends of polyamide 12/ maleic anhydride grafted paraffin as a potential phase change material [12], and combining various low-density, linear lowdensity, and high-density polyethylenes as matrices for phase change materials based on a soft, Fischer-Tropsch paraffin wax [13] and polypropylene/wax blends [15]. However, previous studies have focused on the thermal storage and mechanical properties of blend films.…”

Section: Introductionmentioning

confidence: 99%

“…However, previous studies have focused on the thermal storage and mechanical properties of blend films. In this study we use lowdensity polyethylene (LDPE), a cheap and commodity polymer, as a supporting material for the successful utilization of shape-stabilized PCM [11,12,14]. The LDPE/PW composite films were prepared using a twin-screw extruder to investigate the role of PW in a LDPE matrix for use as a functional packaging material with temperature-dependent gas permeability.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the paraffin wax (PW) content on the thermal and permeation properties of the LDPE/PW composite films

et al. 2015

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A series of low density polyethylene/paraffin wax (LDPE/PW) composite films were fabricated via a twin-screw extruder, and their morphologies, thermal properties, gas and vapor permeations, and surface properties were interpreted as functions of the PW contents. The PW was well dispersed into the LDPE matrix at low PW contents, whereas phase separation and an increase in surface roughness occurred with increasing PW content. The parameter results of surface properties such as contact angle, surface free energy, and solubility showed that the hydrophobicity of the LDPE/PW composite films also increased, and their phase changes and permeation properties were significantly dependent on the PW contents in the LDPE matrix. With increasing PW contents, both the oxygen transmittance rate (OTR) and water vapor transmittance rate (WVTR) of the LDPE/PW composite films decreased at a relatively low measuring temperature (23°C), and increased at a relatively high temperature (48°C). These results relate to the morphological structure (including tortuous paths and crystallinity) of the composite films via the incorporation of PW.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of the paraffin wax (PW) content on the thermal and permeation properties of the LDPE/PW composite films

et al. 2015

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Metallic Particle‐Filled Polymer Microcomposites

Garnier

Agoudjil

Boudenne³

2012

Polymer Composites

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Investigation of thermally conducting phase‐change materials based on polyethylene/wax blends filled with copper particles

Molefi

Luyt

Krupa

2010

J of Applied Polymer Sci

Self Cite

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This article reports on the morphology, melting and crystallization behavior, thermal stability, tensile properties, and thermal conductivity of phasechange materials (PCM) for thermal energy storage. These materials were based on a soft Fischer-Tropsch paraffin wax (PCM) blended with low-density polyethylene, linear low-density polyethylene, and high-density polyethylene. These immiscible blends were melt-mixed with copper (Cu) microparticles (up to 15 vol %) to improve the thermal conductivity in the matrix material. The presence of the Cu microparticles in the PCMs did not significantly change the crystallization behavior, thermal stability, or tensile properties of the blend composites in comparison with the corresponding polyethylene/wax blends and polyethylene/Cu composites. The observed differences were related to the fact that the wax seemed to have a higher affinity for the Cu particles than any of the polyethylenes, and so it crystallized as a layer around the Cu particles. The thermal conductivity of the samples increased almost linearly with increasing Cu content, but the samples had slightly lower values than the corresponding polyethylene/Cu composites, probably because of the lower thermal conductivity of the wax.

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Comparison of LDPE, LLDPE and HDPE as matrices for phase change materials based on a soft Fischer–Tropsch paraffin wax

Cited by 91 publications

References 20 publications

Effects of the paraffin wax (PW) content on the thermal and permeation properties of the LDPE/PW composite films

Effects of the paraffin wax (PW) content on the thermal and permeation properties of the LDPE/PW composite films

Metallic Particle‐Filled Polymer Microcomposites

Investigation of thermally conducting phase‐change materials based on polyethylene/wax blends filled with copper particles

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