Characterization and Reliability of Caprylic Acid-Stearyl Alcohol Binary Mixture as Phase Change Material for a Cold Energy Storage System

Ayaz, Hamza; Chinnasamy, Veerakumar; Cho, Honghyun

doi:10.3390/ma14237418

Cited by 13 publications

(3 citation statements)

References 38 publications

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“…The absorption peak at 3321 cm −1 corresponds to –OH stretching vibrations, while peaks at 1462 cm −1 and 1060 cm −1 represent –CH 2 and C–O stretching, respectively. An additional peak associated with C–O stretching was observed at 729 cm −1 [ 69 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Theophylline Controlled Release Matrix System Incorporating Poloxamer 407, Stearyl Alcohol, and Hydroxypropyl Methylcellulose: A Novel Formulation and Development Study

Sakkal,

Arafat,

Yuvaraju

et al. 2024

Polymers

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Background: Theophylline (THN), a bronchodilator with potential applications in emerging conditions like COVID-19, requires a controlled-release delivery system due to its narrow therapeutic range and short half-life. This need is particularly crucial as some existing formulations demonstrate impaired functionality. This study aims to develop a new 12-h controlled-release matrix system (CRMS) in the form of a capsule to optimize dosing intervals. Methods: CRMSs were developed using varying proportions of poloxamer 407 (P-407), stearyl alcohol (STA), and hydroxypropyl methylcellulose (HPMC) through the fusion technique. Their in vitro dissolution profiles were then compared with an FDA-approved THN drug across different pH media. The candidate formulation underwent characterization using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. Additionally, a comprehensive stability study was conducted. Results: In vitro studies showed that adjusting the concentrations of excipients effectively controlled drug release. Notably, the CRMS formulation 15 (CRMS-F15), which was composed of 30% P-407, 30% STA, and 10% HPMC, closely matched the 12 h controlled-release profile of an FDA-approved drug across various pH media. Characterization techniques verified the successful dispersion of the drug within the matrix. Furthermore, CRMS-F15 maintained a consistent controlled drug release and demonstrated stability under a range of storage conditions. Conclusions: The newly developed CRMS-F15 achieved a 12 h controlled release, comparable to its FDA-approved counterpart.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Theophylline Controlled Release Matrix System Incorporating Poloxamer 407, Stearyl Alcohol, and Hydroxypropyl Methylcellulose: A Novel Formulation and Development Study

Sakkal,

Arafat,

Yuvaraju

et al. 2024

Polymers

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“…The OD shows characteristic CO and OH peaks at 1062 and 3330 cm −1 . [ 35 ] The PEMAGMA shows the characteristic epoxy COC peak at 911 cm −1 , ester (CO) peak at 1159 cm −1 , and CO peak at 1735 cm −1 . [ 36–39 ] The peaks corresponding to CO at 1062 cm −1 , CO at 1159 cm −1 , and CO at 1735 cm −1 are still visible in OP.…”

Section: Resultsmentioning

confidence: 99%

Covalently Functionalized Leakage‐Free Healable Phase‐Change Interface Materials with Extraordinary High‐Thermal Conductivity and Low‐Thermal Resistance

Jaleel

Baik

2023

Advanced Materials

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Phase-change materials (PCMs) have received considerable attention to take advantage of both pad-type and grease-type thermal interface materials (TIMs). However, the critical drawbacks of leaking, non-recyclability, and low thermal conductivity (𝜿) hinder industrial applications of PCM TIMs. Here, leakage-free healable PCM TIMs with extraordinarily high 𝜿 and low total thermal resistance (R t ) are reported. The matrix material (OP) is synthesized by covalently functionalizing octadecanol PCM with polyethylene-co-methyl acrylate-co-glycidyl methacrylate polymer through the nucleophilic epoxy ring opening reaction. The OP changes from semicrystalline to amorphous above the phase-transition temperature, preventing leaking. The hydrogen-bondforming functional groups in OP enable nearly perfect healing efficiencies in tensile strength (99.7%), 𝜿 (97.0%), and R t (97.4%). Elaborately designed thermally conductive fillers, silver flakes and multiwalled carbon nanotubes decorated with silver nanoparticles (nAgMWNTs), are additionally introduced in the OP matrix (OP-Ag-nAgMWNT). The nAgMWNTs bridge silver-flake islands, resulting in extraordinarily high 𝜿 (43.4 W m −1 K −1 ) and low R t (30.5 mm 2 K W −1 ) compared with PCM TIMs in the literature. Excellent heat dissipation and recycling demonstration of the OP-Ag-nAgMWNT is also carried out using a computer graphic processing unit. The OP-Ag-nAgMWNT is a promising future TIM for thermal management of mechanical and electrical devices.

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“…The pure compound's thermo physical characteristics were found to be 18.4, 61.4°C and 142.6, 240.7 kJ kg −1. 26 Guixiang et al, investigated an eutectic mixture of stearic acid and benzamide with expanded graphite. The thermo physical properties of the pure compounds were also determined.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of thermophysical properties of a binary stearyl alcohol and benzamide eutectic phase change material and determination of thermal performance of a solar dryer integrated with phase change material

2023

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A thermal energy storage system must integrate with a solar thermal collector for continuous energy delivery. This article focuses on the identification, preparation, thermo‐physical characteristic studies, and experimental investigation of a novel eutectic hot storage material for solar dryer applications. The identified organic novel eutectic mixture comprises stearyl alcohol and benzamide (SA‐B) with a molar ratio of 70:30. From the differential scanning calorimetry analysis, the melting point and enthalpy of the developed eutectic mixture were found to be 54. 26°C and 157.45 kJ kg−1 respectively. The melting temperature of the eutectic phase‐change material (PCM) fits the drying application. The corrosion analysis test confirms that the prepared eutectic mixture is compact with stainless steel (SS 316) heat exchanger material. Further, the eutectic PCM were characterized using Fourier transform infrared spectroscopy and thermo‐gravimetric analysis, which confirms the material is chemically and thermally stable. The thermal reliability of the eutectic PCM was evaluated through 1000 thermal charge and discharge cycling. In addition, the thermal conductivity of the identified material was found to be 0.18 W m−1 K−1. Thus, the specified material ascertained its suitability for thermal application. Further, 5 kg of eutectic PCM‐filled rectangular heat exchanger was integrated into the solar dryer. The use of eutectic PCM extended the drying time by more than 4 h, which can be helpful to run continuously on intermittent solar days and in the evening after sunset. Hence, the prepared eutectic SA‐B material is irresistible for hot storage dryer application.

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Characterization and Reliability of Caprylic Acid-Stearyl Alcohol Binary Mixture as Phase Change Material for a Cold Energy Storage System

Cited by 13 publications

References 38 publications

Preparation and Characterization of Theophylline Controlled Release Matrix System Incorporating Poloxamer 407, Stearyl Alcohol, and Hydroxypropyl Methylcellulose: A Novel Formulation and Development Study

Preparation and Characterization of Theophylline Controlled Release Matrix System Incorporating Poloxamer 407, Stearyl Alcohol, and Hydroxypropyl Methylcellulose: A Novel Formulation and Development Study

Covalently Functionalized Leakage‐Free Healable Phase‐Change Interface Materials with Extraordinary High‐Thermal Conductivity and Low‐Thermal Resistance

Comprehensive analysis of thermophysical properties of a binary stearyl alcohol and benzamide eutectic phase change material and determination of thermal performance of a solar dryer integrated with phase change material

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