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Polymers
Special Issues
Polymeric Phase Change Materials
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Polymeric Phase Change Materials

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 7047

Special Issue Editors

Dr. Xiaowei Fu

E-Mail Website
Guest Editor
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
Interests: polymeric phase change materials; controlled polymerization; functional polymers
Dr. Yongpeng Xia

E-Mail Website
Guest Editor
School of Materials Science & Engineering, Guilin University of Electronic Technology, Guilin, China
Interests: composite phase change materials; thermal management; thermal energy storage

Special Issue Information

Dear Colleagues,

We are delighted to announce and invite submissions for this Special Issue of Polymers on “Polymeric Phase Change Materials”. In recent decades, research on the development and utilization of renewable energy and the effective utilization of energy has been driven by the growth of greenhouse gas emissions and the increasing cost of fossil fuel-based energy.Polymeric phase change materials received extensive attention as an important potential material to solve the energy and environmental crisis.

Polymeric phase change materials are not merely the subject of fundamental research. Even though a lot of problems are yet to be explained, the studies of the fundamentals remain very up-to date. Research groups investigate, vigorously and with great success, any possible or envisaged applications of such polymers, in building energy saving, communication cooling, cold chain transportation, smart fabrics and many more. This indicates that the area is living and actual. It also indicates that the field is enjoying a growing interest from researchers.

Of course, the fate of each Special Issue depends upon how well it will be received by the scientific community and how many people will respond by submitting reviews, research reports, short communications, and other communications.

The list of keywords below is not exhaustive, but it may help in preparing your submission. Please do not hesitate to go beyond it or to submit a paper whose topic is not explicitly mentioned in this list. 

Best regards,
Dr. Xiaowei Fu
Dr. Yongpeng Xia
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • photothermal phase change materials
  • fluorescent phase change materials
  • flame retardant phase change materials
  • reprocessable phase change materials
  • thermal conductive phase change materials
  • semi-interpenetrating phase change materials
  • interpenetrating phase change materials
  • form-stable phase change materials
  • high performance phase change materials
  • thermoset phase change materials
  • composite phase change materials

Published Papers (4 papers)

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Research

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23 pages, 14518 KiB  
Article
Self-Lubricating and Shape-Stable Phase-Change Materials Based on Epoxy Resin and Vegetable Oils
by Svetlana O. Ilyina, Irina Y. Gorbunova, Veronika V. Makarova, Michael L. Kerber and Sergey O. Ilyin
Polymers 2023, 15(19), 4026; https://doi.org/10.3390/polym15194026 - 09 Oct 2023
Viewed by 882
Abstract
Palm or coconut oil is capable of dissolving in a mixture of bisphenol A-based epoxy resin and a high-temperature hardener (4,4′-diaminodiphenyl sulfone) when heated and then forms a dispersed phase as a result of cross-linking and molecular weight growth of the epoxy medium. [...] Read more.
Palm or coconut oil is capable of dissolving in a mixture of bisphenol A-based epoxy resin and a high-temperature hardener (4,4′-diaminodiphenyl sulfone) when heated and then forms a dispersed phase as a result of cross-linking and molecular weight growth of the epoxy medium. Achieving the temporary miscibility between the curing epoxy matrix and the vegetable oil allows a uniform distribution of vegetable oil droplets in the epoxy medium. This novel approach to creating a dispersed phase-change material made a cured epoxy polymer containing up to 20% oil. The miscibility of epoxy resin and oil was studied by laser interferometry, and phase state diagrams of binary mixtures were calculated according to theory and experiments. A weak effect of oil on the viscosity and kinetics of the epoxy resin curing was demonstrated by rotational rheometry. According to differential scanning calorimetry and dynamic mechanical analysis, the oil plasticizes the epoxy matrix slightly, expanding its glass transition region towards low temperatures and reducing its elastic modulus. In the cured epoxy matrix, oil droplets have a diameter of 3–14 µm and are incapable of complete crystallization due to their multi-component chemical composition and non-disappeared limited miscibility. The obtained phase-change materials have relatively low specific energy capacity but can be used alternatively as self-lubricating low-noise materials due to dispersed oil, high stiffness, and reduced friction coefficient. Palm oil crystallizes more readily, better matching the creation of phase-change materials, whereas coconut oil crystallization is more suppressed, making it better for reducing the friction coefficient of the oil-containing material. Full article
(This article belongs to the Special Issue Polymeric Phase Change Materials)
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24 pages, 17415 KiB  
Article
Epoxy Phase-Change Materials Based on Paraffin Wax Stabilized by Asphaltenes
by Svetlana O. Ilyina, Anna V. Vlasova, Irina Y. Gorbunova, Nikolai I. Lukashov, Michael L. Kerber and Sergey O. Ilyin
Polymers 2023, 15(15), 3243; https://doi.org/10.3390/polym15153243 - 29 Jul 2023
Cited by 2 | Viewed by 1602
Abstract
The usual problem of meltable phase-change agents is the instability in their form upon heating, which can be solved by placing them into a continuous polymer matrix. Epoxy resin is a suitable medium for dispersing molten agents, but it is necessary to make [...] Read more.
The usual problem of meltable phase-change agents is the instability in their form upon heating, which can be solved by placing them into a continuous polymer matrix. Epoxy resin is a suitable medium for dispersing molten agents, but it is necessary to make the obtained droplets stable during the curing of the formed phase-change material. This work shows that molten paraffin wax forms a Pickering emulsion in an epoxy medium and in the presence of asphaltenes extracted from heavy crude oil. Theoretical calculations revealed the complex equilibrium in the epoxy/wax/asphaltene triple system due to their low mutual solubility. Rheological studies showed the viscoplastic behavior of the obtained dispersions at 25 °C, which disappears upon the heating and melting of the paraffin phase. Wax and asphaltenes increased the viscosity of the epoxy medium during its curing but did not inhibit cross-linking or reduce the glass transition temperature of the cured polymer. As a result of curing, it is possible to obtain phase-change materials containing up to 45% paraffin wax that forms a dispersed phase with a size of 0.2–6.5 μm. The small size of dispersed wax can decrease its degree of crystallinity to 13–29% of its original value, reducing the efficiency of the phase-change material. Full article
(This article belongs to the Special Issue Polymeric Phase Change Materials)
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16 pages, 5035 KiB  
Article
Cadmium Sulfide—Reinforced Double-Shell Microencapsulated Phase Change Materials for Advanced Thermal Energy Storage
by Shendao Zhang, Yucao Zhu, Huanzhi Zhang, Fen Xu, Lixian Sun, Yongpeng Xia, Xiangcheng Lin, Hongliang Peng, Lei Ma, Bin Li, Erhu Yan and Pengru Huang
Polymers 2023, 15(1), 106; https://doi.org/10.3390/polym15010106 - 27 Dec 2022
Cited by 4 | Viewed by 1866
Abstract
Phase change materials (PCMs) are widely used to improve energy utilization efficiency due to their high energy storage capacity. In this study, double-shell microencapsulated PCMs were constructed to resolve the liquid leakage issue and low thermal conductivity of organic PCMs, which also possess [...] Read more.
Phase change materials (PCMs) are widely used to improve energy utilization efficiency due to their high energy storage capacity. In this study, double-shell microencapsulated PCMs were constructed to resolve the liquid leakage issue and low thermal conductivity of organic PCMs, which also possess high thermal stability and multifunctionality. We used assembly to construct an inorganic–organic double shell for microencapsulate PCMs, which possessed the unprecedented synergetic properties of a cadmium sulfide (CdS) shell and melamine–formaldehyde polymeric shell. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirmed the well-designed double-shell structure of the microcapsules, and the CdS was successfully assembled as the second shell on the surface of the polymer shell. The differential scanning calorimeter (DSC) showed that the double-shell microcapsules had a high enthalpy of 114.58 J/g, which indicated almost no changes after experiencing 100 thermal cycles, indicating good thermal reliability. The microcapsules also showed good shape stability and antileakage performance, which displayed no shape change and leakage after heating at 60 °C for 30 min. In addition, the photothermal conversion efficiency of the double-shell microcapsules reached 91.3%. Thus, this study may promote the development of microencapsulated PCMs with multifunctionality, offering considerable application prospects in intelligent temperature management for smart textiles and wearable electronic devices in combination with their solar thermal energy conversion and storage performance. Full article
(This article belongs to the Special Issue Polymeric Phase Change Materials)
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Review

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19 pages, 5343 KiB  
Review
Form-Stable Phase Change Material with Wood-Based Materials as Support
by Farzana Hanif, Muhammad Imran, Yuang Zhang, Zhaoying Jia, Xiaohe Lu, Rongwen Lu and Bingtao Tang
Polymers 2023, 15(4), 942; https://doi.org/10.3390/polym15040942 - 14 Feb 2023
Cited by 8 | Viewed by 1873
Abstract
Building shape-stable phase change materials (PCMs) are crucial for their practical applications. Particularly, it is vital to utilize renewable/recyclable biomass media as the support material of form-stable PCMs. In this review article, we summarized the recent developments for building form-stable PCMs consisting of [...] Read more.
Building shape-stable phase change materials (PCMs) are crucial for their practical applications. Particularly, it is vital to utilize renewable/recyclable biomass media as the support material of form-stable PCMs. In this review article, we summarized the recent developments for building form-stable PCMs consisting of wood as a supporting material, either carbonized wood or wood composites. Moreover, the electrothermal conversion and photothermal conversion of form-stable PCMs based on carbonized wood are also demonstrated. In addition, the current technical problems and future research developments of wood-based PCMs are discussed, especially the leakage problem of PCMs during the phase change transition process. All of this information will be helpful for the in-depth understanding and development of new PCMs suitable for wide application perspectives. Full article
(This article belongs to the Special Issue Polymeric Phase Change Materials)
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