Characterization of expanded graphite-based erythritol/urea eutectic phase change material and corresponding mathematical solar heating application analysis

Zhang, Xuemei; Guo, Leihong; Ren, Jing; Kong, Xiangming

doi:10.1016/j.applthermaleng.2022.118938

Cited by 25 publications

(10 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LOI value of PLA composites increased from 20 to 22 after ETPLA synthesis because sugar-alcohol PCM is nonflammable. 43 Moreover, when 50 wt % hybrid filler (CF-OH:AlN = 1:2) was loaded, the LOI value increased to 27.4 and achieved a V-0 rating. This phenomenon was because the AlN particles formed an intact and interconnected inorganic filler network with CF-OH in the ETPLA matrix.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

See 1 more Smart Citation

Fabrication of Biobased Advanced Phase Change Material and Multifunctional Composites for Efficient Thermal Management

Lee

Yang

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

In this study, an advanced phase change material (PCM) was fabricated to combine the properties of a biobased thermoplastic polymer and the heat storage of PCM to overcome the limitations of the existing PCM composites. The novel PCM of erythritol (ET)-grafted polylactic acid (PLA) (ETPLA) was prepared by the in situ polymerization of ET and PLA. The thermally conductive ETPLA composites were fabricated by injection molding using a hybrid filler system of oxidized carbon fiber (CF-OH) and aluminum nitride (AlN), which showed a high through-plane thermal conductivity of 4.25 W/mK, a tensile strength of 16.4 MPa (1953% enhancement comparing pure ET), an elongation at break of 4.4% (189% enhancement comparing pure ET), and latent heat of 170.7 J/g. Thus, the ETPLA/CF-OH/AlN composites facilitate efficient thermal management to combine heat saving and heat dissipation through the large latent heat and high thermal conductivity. Thus, the fabricated PCM composites have potential applications in thermal management systems of next-generation electronic devices.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 95%

“…Table and Figure d show the LOI values and UL-94 rating of composites. The LOI value of PLA composites increased from 20 to 22 after ETPLA synthesis because sugar-alcohol PCM is nonflammable . Moreover, when 50 wt % hybrid filler (CF-OH:AlN = 1:2) was loaded, the LOI value increased to 27.4 and achieved a V-0 rating.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Biobased Advanced Phase Change Material and Multifunctional Composites for Efficient Thermal Management

Lee

Yang

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…[31] Xuemei Zhang et al also revealed potential of erythritol/urea eutectic/EG composites for solar heating application. [32] Although there has a significant process in preparation of PCM/EG composites, there are some topics remaining to be investigated further. Most research works focus on thermal behavior of PCM/EG composites (e. g., enthalpy value, thermal conductivity etc.…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of Phase Change Materials (PCMs)/Expanded Graphite (EG) Composites and Their Thermal Behavior under Hot and Humid Conditions

et al. 2023

View full text Add to dashboard Cite

Expanded graphite (EG) has been used to store phase change materials (PCM) to enhance thermal conductivity and avoid leakage. However, systematic investigation on physical structure of various embedded PCMs in EG is not reported. Besides, the effect of environment on thermal behavior of PCM/EG composites has not been investigated yet. In this work, three common PCMs (including myristic acid (MA), polyethylene glycol (PEG) and paraffin wax (PW)) were embedded in EG and three PCM/EG composites were obtained. As a result, capillary force between EG and PCMs supported encapsulation of PCMs in EG. PCM/EG composites had narrower phase change range while supercooling degree values were different when various PCMs were used. Besides, the hot and humid environment had a side effect on thermal energy storage of PCMs and PCM/EG composites. The inherent hydrophilicity of PCMs was essential for resistance against side effect of moisture on thermal energy storage.

show abstract

“…5 Nevertheless, conventional phase change materials possess inherent limitations that hinder their practical applications. 6 Over the past few decades, various types of solid−liquid phase change materials (PCMs) have been used in the medium temperature range, such as hydrate salts, 7 eutectics, 8 and sugar alcohols. 9 Nevertheless, these materials are plagued by significant challenges related to phase separation and leakage during repeated solid−liquid phase changes.…”

Section: Introductionmentioning

confidence: 99%

Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage

Dai

Gao

Wang

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

As the global energy crisis intensifies, the development of solar energy has become a vital area of focus for many nations. The utilization of phase change materials (PCMs) for photothermal energy storage in the medium temperature range holds great potential for various applications, but their conventional forms face several challenges. For instance, the longitudinal thermal conductivity of photothermal PCMs is inadequate for effective heat storage on the photothermal conversion surface, and there is a risk of leakage due to repeated solid–liquid phase transitions. Here, we report a solid–solid phase change material, tris(hydroxymethyl)aminomethane (TRIS), which has a phase change temperature of 132 °C in the medium temperature range, enabling high-grade and stable solar energy storage. To overcome the low thermal conductivity problem, we propose a large-scale production of oriented high thermal conductivity composites by compressing a mixture of TRIS and expanded graphite (EG) using the pressure induction method to create in-plane highly thermally conductive channels. Remarkably, the resulting phase change composites (PCCs) exhibit a directional thermal conductivity of 21.3 W/(m·K). Furthermore, the high phase change temperature (132 °C) and large phase change entropy (213.47 J/g) enable a large-capacity high-grade thermal energy to be used. The developed PCCs, when combined with selected photo-absorbers, exhibit efficient integration of solar-thermal conversion and storage. Additionally, we also demonstrated a solar-thermoelectric generator device with an energy output of 93.1 W/m2, which is close to the power of photovoltaic systems. Overall, this work provides a technological route to the large-scale fabrication of mid-temperature solar energy storage materials with high thermal conductivity, high phase change enthalpy, and no risk of leakage, and also offers a potential alternative to photovoltaic technology.

show abstract

Characterization of expanded graphite-based erythritol/urea eutectic phase change material and corresponding mathematical solar heating application analysis

Cited by 25 publications

References 58 publications

Fabrication of Biobased Advanced Phase Change Material and Multifunctional Composites for Efficient Thermal Management

Fabrication of Biobased Advanced Phase Change Material and Multifunctional Composites for Efficient Thermal Management

Structural Analysis of Phase Change Materials (PCMs)/Expanded Graphite (EG) Composites and Their Thermal Behavior under Hot and Humid Conditions

Oriented High Thermal Conductivity Solid–Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy Storage

Contact Info

Product

Resources

About