Journal of Textile Research ›› 2025, Vol. 46 ›› Issue (03): 9-16.doi: 10.13475/j.fzxb.20240304501

• Fiber Materials • Previous Articles     Next Articles

Preparation and thermal properties of carbon nanotube/polyethylene glycol composite phase change fiber

LIAO Tanqian1,2, LI Wenya1(), YANG Xiaoyu3, ZHAO Jingna2, ZHANG Xiaohua4   

  1. 1. School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China
    3. School of Science, Nanchang Institute of Technology, Nanchang, Jiangxi 330099, China
    4. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
  • Received:2024-03-18 Revised:2024-09-29 Online:2025-03-15 Published:2025-04-16
  • Contact: LI Wenya E-mail:leewya@126.com

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Abstract:

Objective Multifunctional fibrous phase change materials, namely PCM fibers, are a promising candidate for energy storage and thermal management applications, especially the wearable and flexible devices. The future development of PCM fibers requires efficient and facile energy conversion, high density storage capacity, and the cap ability to respond different stimuli. However, the inherent shortcomings of the organic PCM make it still challenging to simultaneously realize both solar energy conversion and energy storage. Thus, the appropriate incorporation or composition of carbon nanotubes (CNTs) into organic PCMs has been considered an effective solution to solve the above problems.

Method A cooperative in situ impregnation is adopted to simultaneously introduce polyethylene glycol (PEG) into CNT network framework, resulting in a CNT/PEG composite PCM fiber. In this strategy, a pre-densified CNT fiber is used as the CNT framework. During an electrolysis-induced expansion, the CNT scaffold is expanded by orders of magnitude with the network structure well maintained. Therefore, organic PCM (with different molecule weight) molecules can be simultaneously impregnated into the expanded CNT scaffold. After the composition and post-spinning, a continuous composite fiber was obtained.

Results Such strategy can result in a nearly ideal composite structure, including: 1) the organic PCM can be loaded at super high mass fractions, up to 94%; 2) PCM molecules are uniformly introduced into the CNT scaffold; 3) The CNT scaffold provided the excellent pathways to conduct heat, electrons and stresses, leading to the greatly enhanced thermal performance (including the phase change as well) and superior mechanical, and electrical properties; 4) the network structure provides the perfect solution for the liquid leakage; 5) the composite PCM fiber exhibits superior cyclic stability. Besides these overall advantages, the crystallinity, phase change temperatures, the phase change enthalpies can also be precisely regulated to meet different requirements.

Conclusion This study provides a new strategy for the design and construction of composite PCMs based on CNT networks for high efficient photothermal conversion, by virtue of the presence of CNT network, the obtained PCM fiber with the characteristics of high loading (up to 94%) and uniformly compounding, exhibits superior mechanical, electrical and thermal properties, and high cap abilities of energy conversion and storage, favourable thermal cycling and shape stability. All of these characteristics provide a new types of multifunctional fiber for the development of advanced wearable thermal management textile.

Key words: intelligent temperature control textile, phase change fiber, carbon nanotube fiber, in situ composite, phase change energy storage, photothermal conversion, encapsulation

CLC Number: 

  • TS102.5

Fig.1

Structure schematic diagram of CNT fibers during hydrogen evolution expansion"

Fig.2

SEM images of CNT fibers"

Fig.3

SEM images of CNT/PEG composite phase change fibers. (a) Surface (×200); (b) Surface (×2 000); (c) Surface (×5 000); (d) Cross section (×5 000)"

Fig.4

TG curves of CNT/PEG composite phase change fibers"

Fig.5

DSC curves of CNT/PEG composite phase change fiber"

Tab.1

Thermal performance of CNT/PEG composite phase fibers"

试样
编号		 熔融温度/
℃		 熔融焓值/
(J·g-1)		 结晶温度/
℃		 结晶焓值/
(J·g-1)
试样 PEG 试样 PEG 试样 PEG 试样 PEG
1 24.1 25.5 134.2 136.4 9.2 10.6 136.4 139.3
2 41.8 40.6 147.6 150.1 14.4 11.7 152.3 156.7
3 46.1 45.5 155.0 159.0 17.4 16.9 157.1 166.5
4 52.3 47.7 162.0 168.1 16.1 17.9 165.1 171.2
5 53.5 51.9 167.3 173.0 24.7 20.9 168.2 188.0

Fig.6

X-ray diffraction patterns of CNT, PEG and CNT/PEG composite phase change fibers of different mass ratios"

Fig.7

Time-temperature curves of CNT/PEG composite phase change fabric under light"

Fig.8

DSC curves of CNT/PEG composite phase change fibers before and after 120 thermal cycles"

Fig.9

SEM images of CNT/PEG composite phase change fibers before and after thermal cycling. (a) 1 cycle; (b) 40 cycles; (c) 80 cycls; (d) 120 cycles"

Tab.2

Force, electro and thermal property of CNT/PEG composite phase fiber"

试样
编号		 直径/
μm		 断裂强度/
MPa		 断裂
伸长率/%		 电阻/Ω 电导率/
(104 S·m-1)		 热导率/
(W·m-1·K-1)
1 224 412 11.5 73.9 1.72 29.0
2 258 301 11.7 66.2 1.45 28.4
3 270 239 12.0 83.0 1.05 27.0
4 236 219 12.5 79.3 1.44 24.0
5 381 211 17.0 75.8 0.58 22.0

Fig.10

Comparison of leakage of pure PEG1500 (a) and CNT/PEG composite phase change fabric (b) after heating at 80 ℃ for 30 min"

Fig.11

Performance comparison of CNT/PEG composite phase change fiber before and after PDMS coating. (a) Comparison of DSC curves; (b) Comparison of contact angle before PDMS coating; (c) Comparison of contact angle after PDMS coating"

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