The search for novel energy storage materials using differential scanning calorimetry

Babich, M.W.; Hwang, Sangwon; Mounts, Richard D.

doi:10.1016/0040-6031(92)80279-6

Cited by 23 publications

(8 citation statements)

References 3 publications

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“…When the ambient temperature in the space around the PCM material drops, the PCM solidifies, releasing its stored latent heat. PCM absorb and emit heat while maintaining a nearly constant temperature 3,4…”

Section: Introductionmentioning

confidence: 99%

Differential Scanning Calorimetry Study of Blends of Poly(ethylene glycol) with Selected Fatty Acids

Pielichowski¹,

Flejtuch²

2003

Macro Materials & Eng

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A series of blends of poly(ethylene glycol) (PEG) with different molecular weights with: (i) capric, (ii) lauric, (iii) myristic, (iv) palmitic or (v) stearic acid, as a thermal energy storage material, has been investigated by differential scanning calorimetry (DSC). Transition temperatures and latent heat of transition of PEG, fatty acids and their binary blends were determined since these properties are of primary importance in the design of phase change energy storage materials. The experimental results showed that it is possible to obtain homogeneous (as indicated by DSC data) polymer/fatty acid blends by mixing in the melt and subsequent solidification. The melting ranges of PEG/fatty acid systems were observed to be from 30 to 72 °C while their heat of transition lies in the range of 168–208 J · g−1. Synergistic action of the components was found for PEG 10 000/stearic acid blend – heat of transition was ca. 15 and 35% higher than for pure stearic acid and PEG, respectively. This phenomena may be explained in terms of strengthened specific interactions via hydrogen bonding leading to formation of more perfect crystalline lattice.DSC melting and freezing curves of blends PEG/lauric acid. 1 ‐ PEG 3 400/lauric acid, 2 ‐ PEG 10 000/lauric acid, 3 ‐ PEG 20 000/lauric acid, 4 ‐ PEG 35 000/lauric acid (cooling ‐ 10 K · min−1), 5 ‐ PEG 3 400/lauric acid, 6 ‐ PEG 10 000/lauric acid, 7 ‐ PEG 20 000/lauric acid, 8 ‐ PEG 35 000/lauric acid (heating ‐ 10 K · min−1).magnified imageDSC melting and freezing curves of blends PEG/lauric acid. 1 ‐ PEG 3 400/lauric acid, 2 ‐ PEG 10 000/lauric acid, 3 ‐ PEG 20 000/lauric acid, 4 ‐ PEG 35 000/lauric acid (cooling ‐ 10 K · min−1), 5 ‐ PEG 3 400/lauric acid, 6 ‐ PEG 10 000/lauric acid, 7 ‐ PEG 20 000/lauric acid, 8 ‐ PEG 35 000/lauric acid (heating ‐ 10 K · min−1).

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Section: Introductionmentioning

confidence: 99%

Differential Scanning Calorimetry Study of Blends of Poly(ethylene glycol) with Selected Fatty Acids

Pielichowski¹,

Flejtuch²

2003

Macro Materials & Eng

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“…Qiu et al [19] and Li et al [20] have determined Ti for the melting peak of octadecane. The majority of researchers have defined Te [21,22,23,24,25,26,27,28,29,30,31] or Tp [19,20,29,31,32,33,34,35,36,37,38,39,40,41] as the melting temperature. Temperatures T* with insufficient information about their determination have been reported for DSC measurements [42,43,44,45,46,47,48,49,50,51], for adiabatic calorimeters (AC) [52,53,54,55] and for results which have been achieved with other not classified (NC) techniques [6,56,57,58,59,60,61,62].…”

Section: Literature Review Of Thermophysical Properties Of Octadecanementioning

confidence: 99%

“…As for the melting temperature, there are numerous results for the melting enthalpy of octadecane available in the literature. Many of these results were also obtained from the heat flow signal of DSC measurements, but without giving information about the way of determining the peak area which is the measure for the melting enthalpy [19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,47,48,49,50,51]. The peak area depends on the integration limits and the type of the assumed baseline of the heat flow signal [18].…”

Section: Literature Review Of Thermophysical Properties Of Octadecanementioning

confidence: 99%

“…Only temperature data which were achieved as the extrapolated onset temperature Te or the temperature T* (see Section 2.1) are considered since these temperatures seem to represent a realistic melting point of octadecane.Jeong et al [23] and Qiu et al [31] were removed because they were outliers on the high and low side of temperature data in the literature.Boudouh et al [48], Babich et al [40] and Zhang et al [24] were removed because they were outliers on the high and low side of literature melting enthalpy data.The data of He et al [37], Zhang et al [39] and Zhu et al [41] were excluded since these authors investigated octadecane of low purity.Yu et al [38] were not considered due to identical melting point and enthalpy results compared to a previous publication of the same co-authors [37] despite supposedly different purity grades of octadecane.…”

Section: Preselection Of Datamentioning

confidence: 99%

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Review of Thermophysical Property Data of Octadecane for Phase-Change Studies

et al. 2019

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In this work we derive temperature-dependent functions for the most important material properties needed for phase change studies with octadecane. Over 80 references are reviewed in which at least one thermophysical property of octadecane is measured. The functions are valid ±40 K around the melting temperature and are surrounded by their confidence interval. It turns out that the values for the solid phase have much broader confidence intervals than the ones of the liquid phase. Hence, more accurate measurements are particularly desirable for the solid state material properties.

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“…PEO has been envisaged also as a thermal storage material. Thermal energy transfer occurs when a material undergoes solid/liquid and liquid/solid transition accompanied with heat absorption or release respectively 19, 20. It offers good physical and chemical stability, reproducible thermal behavior without encapsulation problems, and adjustable transition zone unlike the conventional inorganic thermal storage material 21, 22.…”

Section: Introductionmentioning

confidence: 99%

Studies on polyethylene oxide and phenolic resin blends

Ratna

Abraham

Karger‐Kocsis

2008

J of Applied Polymer Sci

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Blends of poly(ethylene oxide) (PEO) and novolac type phenolic resin were prepared by a solution cast method using acetonitrile as a solvent. In this work, we have investigated the PEO/phenolic blends having low phenolic content (0 to 30 wt %) with the objective in mind to design a crystallizable component for a shape memory polymer system having adjustable switching temperature. The blends were characterized by Fourier transform infrared (FTIR) spectroscopy, polarized optical microscopy (POM), and differential scanning calorimetry (DSC). The rate of crystallization and crystallinity (calculated from heat of crystallization value) decrease with increase in novolac content. FTIR analysis indicates the existence of H-bonding between hydroxyl groups of novolac and ether groups of PEO. POM studies indicate that size of Maltese cross section decreases with increase in novolac content and in the blends containing higher novolac content less regular leaf like texture was obtained.

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The search for novel energy storage materials using differential scanning calorimetry

Cited by 23 publications

References 3 publications

Differential Scanning Calorimetry Study of Blends of Poly(ethylene glycol) with Selected Fatty Acids

Differential Scanning Calorimetry Study of Blends of Poly(ethylene glycol) with Selected Fatty Acids

Review of Thermophysical Property Data of Octadecane for Phase-Change Studies

Studies on polyethylene oxide and phenolic resin blends

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