Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 69-73.doi: 10.13475/j.fzxb.20211105406

• Fiber Materials • Previous Articles     Next Articles

Preparation of coaxially electrospun multi-level fiber membrane and its phase change temperature-regulating performance

XU Zhaobao1, HE Cui1, ZHAO Jinchao1(), HUANG Leping2   

  1. 1. Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, Wuhan Textile University, Wuhan, Hubei 430200, China
    2. School of Material Science and Engineering, Wuhan Textile University, Wuhan, Hubei 430200, China
  • Received:2021-11-11 Revised:2021-12-06 Online:2022-02-15 Published:2022-03-15
  • Contact: ZHAO Jinchao E-mail:jczhao@wtu.edu.cn

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Abstract:

In order to further develop phase change thermoregulated textiles that fit the human body temperature, the boron nitride/polyethylene glycol (BN/PAN/PEG) composite phase change fibers were prepared by encapsulating polyethylene glycol (PEG) as the core layer in a boron nitride (BN) reinforced polyacrylonitrile (PAN) shell layer through coaxial electrostatic spinning. The effects of phase change material ratios and BN concentration on the morphology and thermal properties of the spun films were investigated. The spun membranes were characterized by thermal imaging analysis and thermogravimetric analysis. The results show that the phase change temperature of the composite phase change material is 36.4 ℃ to meet the requirement of human temperature comfort when the molar fraction ratio of PEG1500 to PEG1000-2 is 6 to 1. The best thermal conductivity responsiveness and thermal storage of the spun membranes were obtained when the BN concentration was 9%.

Key words: coaxial electrostatic spinning, micro-nanofiber membrane, nuclear-shell structure, phase-change material, boron nitride, phase change temperatue-regulating textile, polyacrylonitrile

CLC Number: 

  • TS102

Fig.1

DSC curves of PEG with different molecular weights(a)and theoretical phase change temperature diagrams of PEG1000-2 and PEG1500 mixture (b)"

Fig.2

DSC curves of PEG mixture"

Fig.3

SEM images of BN/PAN/PEG fibrous membranes"

Fig.4

Diameter distribution of BN/PAN/PEG fibrous membranes"

Fig.5

DSC curves of BN/PAN/PEG fibrous membranes. (a) Melting process; (b) Freezing process"

Tab.1

Thermal properties of the BN/PAN/PEG fibrous membranes"

试样 Tm/℃ ΔHm/
(J·g-1)		 Tc/℃ ΔHc/
(J·g-1)
Tmo Tmp Tca Tcb
PAN/PEG 33.3 43.8 92.7 22.1 28.8 -87.9
1%BN/PAN/PEG 33.2 42.5 88.2 22.8 28.4 -85.4
3%BN/PAN/PEG 33.1 42.5 81.5 22.8 29.1 -75.8
5%BN/PAN/PEG 33.0 40.7 22.8 23.7 27.1 -21.4
7%BN/PAN/PEG 33.0 41.7 39.7 25.8 30.0 -37.1
9%BN/PAN/PEG 33.0 41.7 52.3 25.1 29.2 -48.4

Fig.6

Thermographic images of BN/PAN/PEG fibrous membranes"

Fig.7

Surface temperature variation with heating time of BN/PAN/PEG"

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