Investigating the effect of crystallizability and glass transition temperature of supporting materials for preparing high enthalpy electrospun poly(lactic acid)/poly(ethylene glycol) phase change fibers


Form-stable phase change fibers (PCFs) that are composed of stable supporting material (as polymer matrix) and phase change material (PCM, as working ingredient) have become novel smart materials, being widely applied in energy storage, thermal regulation and the biomedical field. However, the inherent limitation of PCFs is the restriction of the supporting material on the crystallization of the PCM, which results in low phase change enthalpy (ΔH). Here, six different types of PCF comprised of poly(lactic acid) (PLA, as supporting material) and poly(ethylene glycol) (PEG, as PCM) have been fabricated. Their morphology, phase change performance and structural transitions during phase change have been extensively studied. We reveal that the crystallizability and glass transition temperature of PLA have a dominating influence on ΔH. In the optimum system, PLA/PEG PCFs can achieve up to 104 J/g ΔH which is close to the theoretical value of pristine PEG. This high-performance PCF also exhibits only 2.5% ΔH loss after 100 thermal cycles and good ability in thermal energy storage and thermal regulation. This work provides a promising form-stable PCF and introduces a new strategy towards developing high ΔH PCFs by selecting suitable supporting materials.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Urban Technology and the Environment (ASTUTE)
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Aston Polymer Research Group
College of Engineering & Physical Sciences > Engineering for Health
College of Engineering & Physical Sciences > Aston Advanced Materials
Additional Information: Funding Information: The authors thank the financial support from the National Key R&D Program of China (No. 2021YFB3802700 ), National Natural Science Foundation of China (No. U22A20316 and 51890871 ), Guangdong Project (No. 2016ZT06C322 ), Overseas Expertise Introduction Center for Discipline Innovation ( “111 Center” ) and Guangdong University Student Science and Technology Innovation Cultivation Special Fund Project (No. pdjh2023b0038 ). Copyright © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Uncontrolled Keywords: High phase change enthalpy,Phase change fibers,Structural transition,Thermal energy storage,Thermal regulation,Electronic, Optical and Magnetic Materials,Renewable Energy, Sustainability and the Environment,Surfaces, Coatings and Films
Publication ISSN: 0927-0248
Last Modified: 11 Jul 2024 07:20
Date Deposited: 28 Apr 2023 14:27
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Related URLs: https://www.sci ... 927024823001435 (Publisher URL)
https://www.sco ... f0c0bdfc16e3251 (Related URL)
PURE Output Type: Article
Published Date: 2023-07-01
Published Online Date: 2023-04-15
Accepted Date: 2023-04-10
Authors: Jia, Y.
Liao, G.
Wu, Y.
Mykhaylyk, O.
Topham, P.D. (ORCID Profile 0000-0003-4152-6976)
Dong, X.-H.
Chen, C.
Yu, Q.
Wang, L.

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