Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (02): 27-33.doi: 10.13475/j.fzxb.20201009007

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of continuously produced electric-responsive liquid crystal fibers

SHENG Mingfei1,2, WANG Wanning1,2, ZHANG Liping1,2, FU Shaohai1,2()   

  1. 1. Jiangsu Engineering Research Center for Digital Textile Inkjet Printing, Wuxi, Jiangsu 214122, China
    2. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2020-11-02 Revised:2020-11-12 Online:2021-02-15 Published:2021-02-23
  • Contact: FU Shaohai E-mail:shaohaifu@hotmail.com

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Abstract:

To solve the color changing problem in flexible display made of electro-responsive liquid crystal fibers without an external electrode, this study developed a preparation process for electrochromic liquid crystal (ECLC) fibers with a coaxial sandwich structure. The ECLC fiber with conductive fiber for the inner conductive layer, conductive hydrogel for the outer transparent conductive layer, polymer dispersed liquid crystal (PDLC) as the electrochromic layer was prepared via a continuous coating method. The influence of conductive fiber types and PDLC components on the morphology and electrochromic properties of ECLC fibers was explored. The results show that when the carbon/polyamide fiber is as the core material and the mass ratio of R-CLC/polymethyl methacrylate/CH2Cl2 is set to 15∶1∶8, the prepared ECLC fiber has an obvious three-layer core-shell structure demonstrating good electrochromic performance in low driving voltage (40 V) and fast response time (9 s). The electrode-less ECLC fiber device developed in this study lays the foundation for the development of smart flexible display textiles.

Key words: cholesteric liquid crystal, coaxial structure, electrochromic property, flexible display, liquid crystal fiber, conductive hydrogel

CLC Number: 

  • TS101.8

Fig.1

Synthetic mechanism diagram of conductive hydrogel"

Fig.2

Schematic diagram of ECLC fiber preparation"

Fig.3

OM images of ECLC fiber with different core materials (×100). (a) Nylon;(b) Silver/polyester fiber;(c) Single-strand carbon/polyamide conductive fiber;(d) 16-strand carbon/ polyamide conductive fiber"

Fig.4

Static water contact angle test of polyamide(a),silver/polyester (b)and carbon/polyamide conductive fiber (c)"

Fig.5

Surface performance simulation curves of polyamide, silver/polyester, and carbon/polyamide fiber"

Fig.6

Optical microscope photos of 2# with different mass ratios of R-CLC, PMMA and CH2Cl2"

Fig.7

Morphology and structure analysis diagram of ECLC fiber. (a) OM images of 3#; (b) SEM images (×2000)"

Fig.8

Infrared spectra of ECLC fiber and its raw materials"

Fig.9

TGA(a) and DTG(b) curves of ECLC fiber and its raw materials"

Fig.10

Schematic diagram of electro-responsive of ECLC fiber"

Fig.11

Electrochromic process images of ECLC fiber(×100)"

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