Alkenones as renewable phase change materials

O’Neil, Gregory W.; Yen, Tian Qing; Leitch, Michael; Wilson, Gary R.; Brown, Emily; Rider, David A.; Reddy, Christopher M.

doi:10.1016/j.renene.2018.11.001

Cited by 25 publications

(24 citation statements)

References 44 publications

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“…primarily C 37 and C 38 ) alkenones (5% decay at 271.9 vs. 276.7 C), supporting our prior conclusion that the performance of alkenone-based PCMs would not be significantly impacted by small changes in carbon length (e.g. ± 1-2 carbons) and unsaturation (O'Neil et al, 2019).…”

Section: Resultssupporting

confidence: 82%

“…Alkenones were also analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The DSC thermogram exhibited a sharp endothermic melting peak centered at 66.8 C, in the same range for other T. lutea alkenone mixtures (McIntosh et al, 2018;O'Neil et al, 2019). The thermal stability of these alkenones was also nearly identical to values we have reported previously for common (i.e.…”

Section: Resultssupporting

confidence: 82%

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Unusual Shorter‐Chain C₃₅ and C₃₆ Alkenones from Commercially Grown Isochrysis sp. Microalgae

O’Neil

Gale

Nelson

et al. 2021

J Americ Oil Chem Soc

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Unusual shorter-chain alkenones (C 35 and C 36 ) were the dominant alkenones (rather than C 37 and C 38 ) isolated from commercially grown Tisochrysis lutea microalgae. Structures of the alkenones were determined by analyzing the alkenones and their products following a butenolysis reaction by comprehensive two-dimensional gas chromatography coupled to a high-resolution time-of-flight mass spectrometer (GC × GC-TOF HRMS). The major alkenones were identified as (15E,22E)-heptatriaconta-15,22-dien-2-one and (16E,23E)-octatriaconta-16,23-dien-3-one, similar to one previous finding of abundant shorter-chain alkenones in a culture of Emiliania huxleyi CCMP2758, yet distinguishing them from C 35 and C 36 alkenones extracted from Black Sea sediments with different double bond positions. Our data suggest a possible shared trigger (e.g. nutrient stress) that may occur during cultivation resulting in shorter-chain alkenones from both the aforementioned E. huxleyi and T. lutea. Moreover, for T. lutea, short-chain alkenone biosynthesis can be accompanied by lower alkenone content but higher amounts of valuable docosahexaenoic acid (DHA). These results, therefore, extend beyond alkenones and are important to established and emerging algal oil-based industries.Keywords Isochrysis Á Tisochrysis Á Alkenones Á Omega-3 fatty acids Á Butenolysis Á Comprehensive twodimensional gas chromatography

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 82%

Unusual Shorter‐Chain C₃₅ and C₃₆ Alkenones from Commercially Grown Isochrysis sp. Microalgae

O’Neil

Gale

Nelson

et al. 2021

J Americ Oil Chem Soc

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“…With the increase of LA content, the phase change enthalpy corresponding to LA/MSNM also increased because the latent heat of the composite materials was induced by the phase change of lauric acid. Besides, the changes of phase change temperature and peak temperature were attributed to that the properties of heat storage particles were different from those in their accumulation state caused by surface tension 37 . In addition, it can be seen from Fig.…”

Section: Resultsmentioning

confidence: 99%

Comparison study between mesoporous silica nanoscale microsphere and active carbon used as the matrix of shape-stabilized phase change material

Wang

Tang

Liu

et al. 2019

Sci Rep

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Mesoporous silica nanoscale microsphere (MSNM), with a special morphology, high porosity, large pore volume and specific surface area, was successfully prepared and used as the matrix material of lauric acid (LA) to prepare a favorable shape-stabilized phase change material (LA/MSNM). The porous network structure of MSNM is effective to prevent the leakage and enhance the thermal stability of LA/MSNM. For comparison, shape-stabilized phase change material of LA/AC, which contained commercially purchased active carbon (AC) and LA, was prepared by the same method. Characterizations of LA/MSNM and LA/AC, such as chemical properties, structure, thermal properties and crystallization properties were studied. The mechanisms of interaction between LA molecules and MSNM or AC were explicated. The results of TGA test showed that the LA/MSNM and LA/AC had superior thermal stability, and however, the melting and solidification enthalpies of LA/MSNM were much higher than that of LA/AC, which was attributed that the loading capacity of MSNM was better than that of LA/AC. All of the study results demonstrated that the mesoporous silica nanoscale microspheres of MSNM synthesized in this study possessed the potential for practical applications as a suitable supporter of organic phase change materials.

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“…Although neutral lipids are not the subject of the present study, these compounds may also be important from the perspective of potential applications. For example, alkenones from haptophytes have been reported as promising renewable phase change materials [ 55 ].…”

Section: Discussionmentioning

confidence: 99%

The Polar Lipidome of Cultured Emiliania huxleyi: A Source of Bioactive Lipids with Relevance for Biotechnological Applications

et al. 2020

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Polar lipids from microalgae have aroused greater interest as a natural source of omega-3 (n-3) polyunsaturated fatty acids (PUFA), an alternative to fish, but also as bioactive compounds with multiple applications. The present study aims to characterize the polar lipid profile of cultured microalga Emiliania huxleyi using hydrophilic interaction liquid chromatography coupled with high-resolution mass spectrometry (HILIC–MS) and fatty acids (FA) analysis by gas chromatography (GC–MS). The lipidome of E. huxleyi revealed the presence of distinct n-3 PUFA (40% of total FA), namely docosahexaenoic acid (22:6n-3) and stearidonic acid (18:4n-3), which give this microalga an increased commercial value as a source of n-3 PUFA present in the form of polar lipids. A total of 134 species of polar lipids were identified and some of these species, particularly glycolipids, have already been reported for their bioactive properties. Among betaine lipids, the diacylglyceryl carboxyhydroxymethylcholine (DGCC) class is the least reported in microalgae. For the first time, monomethylphosphatidylethanolamine (MMPE) has been found in the lipidome of E. huxleyi. Overall, this study highlights the potential of E. huxleyi as a sustainable source of high-value polar lipids that can be exploited for different applications, namely human and animal nutrition, cosmetics, and pharmaceuticals.

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Alkenones as renewable phase change materials

Cited by 25 publications

References 44 publications

Unusual Shorter‐Chain C₃₅ and C₃₆ Alkenones from Commercially Grown Isochrysis sp. Microalgae

Unusual Shorter‐Chain C₃₅ and C₃₆ Alkenones from Commercially Grown Isochrysis sp. Microalgae

Comparison study between mesoporous silica nanoscale microsphere and active carbon used as the matrix of shape-stabilized phase change material

The Polar Lipidome of Cultured Emiliania huxleyi: A Source of Bioactive Lipids with Relevance for Biotechnological Applications

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Alkenones as renewable phase change materials

Cited by 25 publications

References 44 publications

Unusual Shorter‐Chain C35 and C36 Alkenones from Commercially Grown Isochrysis sp. Microalgae

Unusual Shorter‐Chain C35 and C36 Alkenones from Commercially Grown Isochrysis sp. Microalgae

Comparison study between mesoporous silica nanoscale microsphere and active carbon used as the matrix of shape-stabilized phase change material

The Polar Lipidome of Cultured Emiliania huxleyi: A Source of Bioactive Lipids with Relevance for Biotechnological Applications

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Product

Resources

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Unusual Shorter‐Chain C₃₅ and C₃₆ Alkenones from Commercially Grown Isochrysis sp. Microalgae

Unusual Shorter‐Chain C₃₅ and C₃₆ Alkenones from Commercially Grown Isochrysis sp. Microalgae