Thermal characterization of phase‐changing materials as stabilized thermal energy storage materials in impregnated wood

Can, Ahmet

doi:10.1002/est2.397

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…Based on the type of phase transition morphology, PCMs can be categorized into solid–solid PCMs and solid–liquid PCMs. − Solid-state PCMs mainly contain esters, , paraffins, aliphatic hydrocarbons, and fatty alcohols . Poly(ethylene glycol) (PEG), as a conventional organic solid–solid PCM, is an ideal high energy storage phase change material due to its good crystallization properties, fast crystallization rate, biocompatibility as well as high enthalpy of phase change (190 J/g) .…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Acrylic Acid-Modified Multicross-Linked Two-Component Waterborne Phase-Change Polyurethane

Lu,

Qin,

Liu

et al. 2024

ACS Appl. Polym. Mater.

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Phase change materials (PCMs) are broadly adopted in buildings and other applications because of their excellent energy storage effect. However, aqueous phase change materials are less reported. In this article, a waterborne polyurethane with phase change functionality (WPU-A) was prepared and modified with trimethylolpropane (TMP) and hydroxyethyl methacrylate (HEMA); and then allowed to cross-link with a waterborne polyurethane (WPU-B) with PTMG as the soft segment to produce a multicross-linked, two-component phasechange waterborne polyurethane (PCMWPU). It is discussed that the phase change properties, hydrophobicity, and tensile strength of PCMWPU films were improved with the addition of WPU-A. The data show that the highest enthalpy of PCMWPU films can reach 90.3 J/g, the static water contact angle can reach 108.3°, and the highest tensile strength is 27.4 MPa. In addition, PCMWPU film has shape stability at higher temperatures (100 °C), no liquid leakage, good thermal stability, and shows some reversible light transmission phenomenon, which has a wide range of application prospects.

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Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Acrylic Acid-Modified Multicross-Linked Two-Component Waterborne Phase-Change Polyurethane

Lu,

Qin,

Liu

et al. 2024

ACS Appl. Polym. Mater.

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“…Paraffin is an inert material that does not react with other components during the modification of wood and bamboo [13], but as a PCM it has low thermal conductivity [14,15]. Enhancing the thermal conductivity and increasing the phase change latent heat of the composite material reinforces the phase-change energystorage performance and plays an important role in temperature regulation and energy saving in indoor environments [16,17]. In addition, it is highly resistant to biological attacks [18,19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Paraffin Impregnation Modification on Bamboo Properties and Microstructure

Huang

Liu

et al. 2023

Forests

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Phase-change energy-storage paraffin regulates the thermal management of buildings, and the material can regulate room temperature as it absorbs and discharges heat. As a porous adsorbent material, bamboo has high permeability. The aim of this study was to increase the amount of paraffin inside bamboo and the latent heat of the phase change. It was performed using vacuum pressurization (VP) and ultra-high-pressure (UHP) impregnation treatments. The effect of UHP impregnation and properties of bamboo were studied. The weight gain, paraffin loss and dimensional changes were measured and compared. The morphology of UHP-impregnated bamboo were characterized using X-ray diffraction (XRD), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The main conclusions are as follows: After UHP impregnation, the highest weight gain was 42%. The loss of paraffin was low, and a high weight percentage gain was maintained. The crystallinity of cellulose decreased to 24% at 100 MPa. The latent heat of the bamboo slices was up to 25.66 J/g at 50 MPa, and the phase change temperature was close to room temperature. At 150 MPa, the hydroxyl content was reduced, and the hydrophilicity decreased. In addition, the content of substances such as hemicellulose in the amorphous zone was reduced under UHP, no new characteristic peaks appeared, and no chemical modifications occurred. The vascular bundles were compressed and dense, and the pores and cell gaps decreased. The thin-walled cells were deformed, and the original cell structure was completely destroyed. The surface of the cells was wrapped or covered with paraffin, confirming that the paraffin could impregnate the bamboo cells under UHP. Therefore, bamboo impregnated with paraffin can regulate temperature and save energy in buildings. It is resistant to biological attacks, and UHP improves the impregnation efficiency.

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“…Thermal-powered storage technologies could be one of the innovative solutions. These technologies are a reliable solution to store heat with help of bio-based phase change materials (BPCM) located in a lignocellulose matrix (Farid et al 2004;Benli 2013;Aditya et al 2017;Aslani et al 2019: Can 2023 Matter, such as phase change materials (PCMs), can absorb or release relatively large amounts of thermal energy as latent heat during phase transitions. These substances show extraordinary properties, making them valuable in various applications related to thermal energy storage and temperature regulation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of lauric-myristic acid as phase change material in thermally modified wood for thermal energy storage

Demirel

2023

BioRes

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Thermally modified Scots pine samples were impregnated with lauric acid (LA) and myristic acid (MA) as phase change material (PCM) by vacuum process. The LA-MA mixture was prepared at a eutectic ratio of 66 to 34 wt%. Some properties of the wood samples such as hygroscopicity, mechanical, thermal energy storage (TES), and lab-scale thermo-regulative performance were investigated. Fourier transform infrared spectroscopy (FT-IR) was utilized to analyze the physicochemical characteristics of wood samples that underwent thermal treatment. The thermal degradation stability, cycling chemical/thermal reliability, and TES properties of the samples were assessed through TG (thermogravimetric analysis) and DSC (differential scanning calorimetry) analyses. The DSC results of thermally modified wood (TMW)/LA-MA samples showed good energy storage or release capacity with appropriate phase. These analyses also indicated that TMW samples infused with PCM exhibited reduced residue compared to the control samples. The experimental evaluation conducted on a small scale demonstrated that the PCM integrated within the wood effectively retains excess heat within the surrounding environment, thereby restricting heat dissipation. Moreover, the presence of PCM visibly decreased water absorption and enhanced the dimensional stability in wood. The impregnation with LA-MA improved mechanical properties of thermally modified wood despite the thermal modification that normally decreases mechanical properties.

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Thermal characterization of phase‐changing materials as stabilized thermal energy storage materials in impregnated wood

Cited by 4 publications

References 26 publications

Preparation and Properties of Acrylic Acid-Modified Multicross-Linked Two-Component Waterborne Phase-Change Polyurethane

Preparation and Properties of Acrylic Acid-Modified Multicross-Linked Two-Component Waterborne Phase-Change Polyurethane

Effect of Paraffin Impregnation Modification on Bamboo Properties and Microstructure

Evaluation of lauric-myristic acid as phase change material in thermally modified wood for thermal energy storage

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