Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 24-29.doi: 10.13475/j.fzxb.20211102006

• Fiber Materials • Previous Articles     Next Articles

Preparation of bistable electrochromic ion gels and their applications for fabric display devices

LI Jiashuang, ZHANG Liping(), FU Shaohai   

  1. College of Textile Science and Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2021-11-02 Revised:2021-11-24 Online:2022-02-15 Published:2022-03-15
  • Contact: ZHANG Liping E-mail:zhangliping0328@163.com

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Abstract:

In order to develop a highly elastic and bistable electrochromic material for flexible electronic display devices, poly(2-hydroxyethyl acrylate)(PHEA) ionic gel based on hydrogen bond cross-linking network structure was prepared by solution polymerization. The hydrogen bond between the fluorane dye lactone ring and the polymer hydroxyl unit gave the fluorane dye color steadiness. The mechanical properties of PHEA ionic gel were tested by tensile testing machine. The transparency, electrochromic performance and bistable performance of the ionic gel device were characterized by potentiostat and spectrophotometer. The results show that PHEA ionic gel has tensile strength of 537 kPa and tensile resilience of 436%. The resulting electrochromic device is found to have responsiveness of 16.5 s, high coloration contrast of > 80%, bistability of 45 h, and reversibility of > 1 000 cycles, all of which are regarded as excellent. The ionic gel offers good application value in the development of stretchable electrochromic display and intelligent wearable electronic textiles.

Key words: bistability, electrochromic, ionic gel, smart textile, flexible material

CLC Number: 

  • TS101.8

Fig.1

Preparation progress of bistable electrochromic ionic gel"

Fig.2

Physical diagram of bistable electrochromic gel"

Fig.3

Tensile bending diagram of bistable electrochromic gel"

Fig.4

Stress-strain curves of bistable electrochromic gels with different PC content (a) and different MBA content (b)"

Fig.5

Transmittance of bistable electrochromic gel at 497 nm with different PC content (a) and different MBA content (b)"

Tab.1

Electrochromic properties and steady state properties of different PC content gels"

PC质量分数/% 着色时间/s 褪色时间/s 稳态时间/h
20 53.2 148.3 110
25 36.5 105.3 70
30 14.5 32.6 36
35 6.2 16.7 17
40 2.7 5.4 5

Tab.2

Electrochromic properties and steady state properties of different MBA content gels"

MBA质量分数/% 着色时间/s 褪色时间/s 稳态时间/h
0 14.5 32.6 36
0.05 15.3 34.3 40
0.10 15.1 37.8 41
0.15 16.5 38.3 45
0.20 20.3 45.7 32
0.25 26.1 62.4 24

Fig.6

Recycling performance of device"

Fig.7

Electrochromic process (a) and steady state mechanism (b) of fluorane dyes"

Tab.3

Steady-state time of different polymer gel devicesh"

凝胶材料 稳态时间
聚甲基丙烯酸甲酯 0.8
聚丙烯酸甲酯 0.2
聚丙烯酸丁酯 0.5
聚丙烯酸2-羟丙酯 30
聚丙烯酸2-羟乙酯 45

Fig.8

Discoloring physical diagram of bistable PET electrochromic gel device"

Fig.9

Bistable PET electrochromic bracelet for textile decoration"

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