Applicability assessment of stearic acid/palmitic acid binary eutectic phase change material in cooling pavement

Dai, Jiasheng; Ma, Feng; Fu, Zhen; Li, Chen; Jia, Meng; Shi, Ke; Wen, Yalu; Wang, Wentong

doi:10.1016/j.renene.2021.05.063

Cited by 107 publications

(30 citation statements)

References 42 publications

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“…3a and 3b show the TG and DTG curves of FOS, SA and different FOS-SA/EP samples, respectively. It was evident that FOS and SA had one mass loss stage, the decomposition temperature of FOS is 140∼250°C, and the mass loss is 66.42%; The decomposition temperature of SA is 160∼280°C and the mass loss is 99.6%, indicating that SA can be completely decomposed at this temperature [31]. The thermogravimetric curves of different proportions of FOS-SA/EP showed two stages.…”

Section: Ft-ir Analysis Of Composite Fos-sa/epmentioning

confidence: 93%

“…In the FOS-SA/EP composite, diffraction peaks with different intensities are displayed. In addition, with the increase of SA content, the peak intensity of the FOS-SA/EP samples became stronger, which means that the crystallinity of the sample became higher [31]. The results in Table 1 show that with the addition of SA, the T m and ΔH m of the samples increased gradually.…”

Section: Xrd Analysis Of Composite Fos-sa/epmentioning

confidence: 94%

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Study on Sustained-Release Pesticides Blended with Fosthiazate-Stearic Acid/Expanded Perlite

Huang¹,

Wu²,

Zhou³

et al. 2023

Journal of Renewable Materials

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The low utilization rate of pesticides makes the migration of pesticides in water and soil, which brings great harm to the ecosystem. The development of pesticide carriers with good drug loading capacity and release control ability is an effective method to realize effective utilization of pesticides and reduce pesticide losses. In this work, fosthiazate-stearic acid/expanded perlite sustained-release particles were successfully prepared by vacuum impregnation using expanded perlite (EP) as carrier, fosthiazate (FOS) as model pesticide and stearic acid (SA) as hydrophobic matrix. The structure and morphology of the samples were studied by BET, FT-IR, TGA, XRD, DSC and SEM. The effects of different mass ratios of FOS to SA on loading capacity and release rate at 24 h were investigated. The sustained release behavior of FOS-SA/EP at different temperatures and pH values was investigated by static dialysis bag method. The results showed that FOS and SA were adsorbed in EP pores by physical interaction. With the mass ratios of FOS to SA decreasing from 7:3 to 3:7, the 24 h release rate of FOS-SA/EP decreased from 18.77% to 8.05%, and the drug loading decreased from 461.32 to 130.99 mg/g. FOS-SA/EP showed obvious temperature response at 25°C, 30°C and 35°C, the cumulative release rate (CRR) of 200 h were 33.38%, 41.50% and 51.17%, respectively. When pH = 5, the CRR of FOS was higher than that of pH = 7, and the CRR of FOS for 200 h were 49.01% and 30.12%, respectively. At different temperatures and pH = 5, the release mechanism of FOS-SA/EP belongs to the Fickian diffusion mechanism; When pH = 7, the diffusion mechanism is dominant, and the dissolution mechanism is complementary.

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Section: Ft-ir Analysis Of Composite Fos-sa/epmentioning

confidence: 93%

Section: Xrd Analysis Of Composite Fos-sa/epmentioning

confidence: 94%

Study on Sustained-Release Pesticides Blended with Fosthiazate-Stearic Acid/Expanded Perlite

Huang¹,

Wu²,

Zhou³

et al. 2023

Journal of Renewable Materials

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“…Based on the previous studies, inorganic hydrated salts, paraffin wax, sugar alcohol, polyethylene glycol and fatty acids are widely used. [3][4][5][6][7] However, PCMTS are prone to leakage during solid-liquid phase transformation. Therefore, it is necessary and critical to encapsulate phase change materials during melting and crystallization phase transformation.…”

Section: Introductionmentioning

confidence: 99%

Wood‐framed binary eutectic polyethylene glycol (BEPEG) as phase change materials for thermal storage

2023

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Polyethylene glycol (PEG) is widely used in thermal energy storage, but leakage and lack of stability limit its further development. Wood is widely used as matrix to develop functional composites due to its porous structure and unique composition. In this study, a novel shape‐stabilized eutectic phase change material for thermal storage (EPCMTS) with enhanced thermal stability and superior chemical stability was fabricated by incorporating binary eutectic PEG (BEPEG) into porous wood flour (WF). It was found that BEPEG systems composed of PEG600 and PEG1000 at different proportions showed different thermal performances. This EPCMTS at its eutectic point exhibited a melting enthalpy of 45.26 J/g, which is higher than that of incomplete eutectic materials. Its thermal stability was enhanced at eutectic point because the melting temperature of 21.83°C was lower than that of each component. Moreover, the leakage rate can be lowered to only 1.1% at a PEG600:PEG1000 mass ratio of 9:1, which indicated that WF can effectively prevent PEG from leaking. No chemical reaction was detected in both PEG eutectic and WF modification processes. This kind of wood‐framed phase change material has broad application prospects in insulation building envelope.

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“…In addition, the binary and ternary eutectic CPCMs based on fatty acids and fatty alcohols are analyzed and discussed in other studies. 27–31 …”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of capric acid–stearic acid-based ternary phase change materials

Fei

Qian

et al. 2021

RSC Adv.

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Applicability assessment of stearic acid/palmitic acid binary eutectic phase change material in cooling pavement

Cited by 107 publications

References 42 publications

Study on Sustained-Release Pesticides Blended with Fosthiazate-Stearic Acid/Expanded Perlite

Study on Sustained-Release Pesticides Blended with Fosthiazate-Stearic Acid/Expanded Perlite

Wood‐framed binary eutectic polyethylene glycol (BEPEG) as phase change materials for thermal storage

Preparation and properties of capric acid–stearic acid-based ternary phase change materials

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