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Advanced and Multifunctional Phase Change Materials
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Advanced and Multifunctional Phase Change Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".

Deadline for manuscript submissions: closed (20 December 2023) | Viewed by 5194

Special Issue Editor

Dr. Kunjie Yuan

E-Mail Website
Guest Editor
School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083, China
Interests: Solar-thermal storage materials; phase-change building materials; thermal management materials; organic-inorganic hybrid composite materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Thermal energy is indispensable to the sustainable development of modern societies. Being a key component in various domestic and industrial processes as well as in power generation systems, the storage of thermal energy ensures system reliability, power dispatchability, and economic profitability. Thermal energy storage technologies based on phase-change materials (PCMs) have received tremendous attention in recent years owing to their high thermal storage capacity, operational simplicity, and transformative industrial potential. These materials are capable of reversibly storing large amounts of thermal energy during the isothermal phase transition and have enormous potential for the development of state-of-the-art renewable energy infrastructure.

This Special Issue aims to cover the latest developments in advanced and multifunctional PCMs. All aspects related to functional PCMs’ composites preparation, structural characterization, molecular dynamics simulation, thermal management (e.g., heat insulation, heat dissipation etc.), thermal rectification, thermal stealth, and machine learning based on PCMs are considered. Review articles describing the current state of the art are also welcome.

Dr. Kunjie Yuan
Guest Editor

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Keywords

  • phase-change materials
  • latent heat
  • thermal management
  • thermal conductivity
  • microstructure
  • smart materials
  • safe materials
  • energy efficiency

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Published Papers (3 papers)

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Research

18 pages, 8418 KiB  
Article
Investigating the Phase Transition Kinetics of 1-Octadecanol/Sorbitol Derivative/Expanded Graphite Composite Phase Change Material with Isoconversional and Multivariate Non-Linear Regression Methods
by Jun Xu, Yuanyuan Li and Xiaomin Cheng
Materials 2023, 16(21), 7024; https://doi.org/10.3390/ma16217024 - 3 Nov 2023
Cited by 2 | Viewed by 975
Abstract
Organic composite phase change materials (PCMs) have been extensively studied, and it is important to investigate the effect of added components on the phase change process of the organic matrix. Herein, the phase transition process of the composite PCM with 1-octadecanol (OD) as [...] Read more.
Organic composite phase change materials (PCMs) have been extensively studied, and it is important to investigate the effect of added components on the phase change process of the organic matrix. Herein, the phase transition process of the composite PCM with 1-octadecanol (OD) as the matrix adsorbed by a network framework composed of 1,3:2,4-di-(3,4-dimethyl) benzylidene sorbitol (DMDBS) and expanded graphite (EG) was measured using differential scanning calorimetry (DSC) at several linear heating rates. Using isoconversional and multivariate non-linear regression methods, a two-step consecutive reaction model for the composite PCM was established, while the apparent activation energies and pre-exponential factors were determined. The reaction mechanism of the first step was altered compared to pure OD, while the activation energies significantly decreased at the initial stage of the phase transition process and increased at the later stage. Combined with microscopic morphology analysis, the main reasons were the size and nanoconfinement effect. The predictions of the composite PCM under various conditions suggested that the composite PCM had a wider available temperature range compared to pure OD. This research provided a new idea for the in-depth study of the phase transition process of organic composite PCMs, which was helpful for the evaluation of organic composite PCMs. Full article
(This article belongs to the Special Issue Advanced and Multifunctional Phase Change Materials)
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12 pages, 6560 KiB  
Article
Near Infrared Reflection and Hydrophobic Properties of Composite Coatings Prepared from Hollow Glass Microspheres Coated with Needle-Shaped Rutile Shell
by Qianfang Zheng, Shanxia Xiong, Xiaowei Wu, Jianlei Kuang, Wenxiu Liu and Wenbin Cao
Materials 2022, 15(23), 8310; https://doi.org/10.3390/ma15238310 - 23 Nov 2022
Cited by 7 | Viewed by 2172
Abstract
Infrared thermal reflective coating is an effective material to reduce building energy consumption and carbon emission. In this work, needle-shaped-rutile-shell-coated hollow glass microbeads (HGM) were prepared by surface modification of HGM and thermohydrolysis of TiCl4, and the possible shell formation mechanism [...] Read more.
Infrared thermal reflective coating is an effective material to reduce building energy consumption and carbon emission. In this work, needle-shaped-rutile-shell-coated hollow glass microbeads (HGM) were prepared by surface modification of HGM and thermohydrolysis of TiCl4, and the possible shell formation mechanism was also proposed. The near infrared (NIR) reflectance of the coated HGM reached 93.3%, which could be further increased to 97.3% after the rutile shell crystallinity was improved by heat treatment. Furthermore, HGM/styrene–acrylic composite reflective coating was prepared on the surface of gypsum board by facile blending and coating methods, and the thermal insulation performance was measured by an indigenously designed experimental heat set-up. The results show that the composite coating prepared by HGM coated with rutile shell shows better NIR reflectance and thermal insulation performance than that prepared by pure organic coating and uncoated HGM. Meanwhile, it also shows better surface hydrophobicity, which is conducive to long-term and stable infrared reflection performance. Full article
(This article belongs to the Special Issue Advanced and Multifunctional Phase Change Materials)
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15 pages, 3977 KiB  
Article
Preparation and Characteristics of Na2HPO4·12H2O-K2HPO4·3H2O/SiO2 Composite Phase Change Materials for Thermal Energy Storage
by Rongda Ye, Jun Wang, Yanna Li, Wanchun Sun, Qizhang Huang, Sheng Gong and Xugang Shu
Materials 2022, 15(21), 7600; https://doi.org/10.3390/ma15217600 - 29 Oct 2022
Cited by 1 | Viewed by 1552
Abstract
In this paper, a series of eutectic hydrated salts was obtained by mixing Na2HPO4·12H2O (DHPD) with K2HPO4·3H2O (DHPT) in different proportions. With the increase in the content of DHPT, the phase [...] Read more.
In this paper, a series of eutectic hydrated salts was obtained by mixing Na2HPO4·12H2O (DHPD) with K2HPO4·3H2O (DHPT) in different proportions. With the increase in the content of DHPT, the phase transition temperature and melting enthalpy of eutectic hydrated salts decreased gradually. Moreover, the addition of appropriate deionized water improved the thermal properties of eutectic hydrated salts. Colloidal silicon dioxide (SiO2) was selected as the support carrier to adsorb eutectic hydrated salts, and the maximum content of eutectic hydrated salts in composite PCMs was 70%. When the content of the nucleating agent (Na2SiO3·9H2O) was 5%, the supercooling degree of composite PCMs was reduced to the minimum of 1.2 °C. The SEM and FT-IR test results showed that SiO2 and eutectic hydrated salts were successfully combined, and no new substances were formed. When the content of DHPT was 3%, the phase transition temperature and melting enthalpy of composite PCMs were 26.5 °C and 145.3 J/g, respectively. The results of thermogravimetric analysis and heating–cooling cycling test proved that composite PCMs had good thermal reliability and stability. The application performance of composite PCMs in prefabricated temporary houses was investigated numerically. The results indicated that PCM panels greatly increased the Grade I thermal comfort hours and reduced energy consumption. Overall, the composite PCM has great development potential building energy conservation. Full article
(This article belongs to the Special Issue Advanced and Multifunctional Phase Change Materials)
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