Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (08): 63-68.doi: 10.13475/j.fzxb.20191002206

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and property of dye-doped liquid crystal microcapsules for electro-stimulated responsive smart textiles

SHENG Mingfei1,2, 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:2019-10-10 Revised:2020-05-14 Online:2020-08-15 Published:2020-08-21
  • Contact: FU Shaohai E-mail:shaohaifu@hotmail.com

RichHTML

12

PDF (PC)

85

Abstract:

Aiming at the problems that the electrochromic liquid crystal is easy to flow, difficult to shape and difficult to apply to textiles, the dichroic dyes were doped in nematic liquid crystal to form a guest-host material, which was further encapsulated in a microcapsule with polymethyl methacrylate as the shell material by emulsion polymerization. In addition, the unique optical properties of liquid crystals confinement effect were analyzed by polarizing microscope. The morphology and structure of microcapsules were characterized by scanning electron microscope, transmission electron microscope and thermal gravimetric analyzer. The influence of microcapsule coating on the driving voltage and service life of dye-doped liquid crystal were also investigated. The results show that dye-doped liquid crystal microcapsule have obvious core-shell structure, with particle size of 3 μm, core material loading of 70%, and driving voltage of 3.6 V, which is far lower than the human safety voltage. The optical appearance of the microcapsule coated on the conductive fabric can be reversibly changed from colorless state to colored state under the stimulation of direct-current power supply, which lays the foundation for optimizing the preparation process of electrochromic liquid crystal microcapsule devices and improving the flexible display performance of textiles.

Key words: smart textile, ectrochromic, dichroic dye, liquid crystal, emulsion polymerization, microcapsule

CLC Number: 

  • TS101.8

Fig.1

Structure of smart textile display device"

Fig.2

Electron microscope images of dye-dope liquid crystal microcapsules. (a) SEM image(×2 000);(b) TEM image(×10 000)"

Fig.3

Thermal performance analysis of dye-doped liquid crystal microcapsules. (a) TG curves; (b) DTG curves; (c) DSC curves"

Fig.4

Microscope photographs of dye-dope liquid crystal microcapsules(×500). (a) OM image; (b) POM image"

Fig.5

Electrochromic mechanism of dye-doped liquid crystal microcapsules"

Tab.1

Photoelectric properties of dye-doped liquid crystal before and after microencapsulation"

试样
名称		 驱动电
压/V		 透过率/% 对比
度		 循环
次数
最大 最小
微胶囊化前 2.4 91.7 38.3 2.4 小于100
微胶囊化后 3.6 90.3 34.1 2.6 大于500

Fig.6

SEM images of conductive fabric (a) and smart textile device (b) (×1 000)"

Fig.7

Photographs of smart textile device under electrochromic process. (a) OFF state; (b) ON state"

[1] 杨晨啸, 李鹂. 柔性智能纺织品与功能纤维的融合[J]. 纺织学报, 2018,39(5):165-174.
YANG Chenxiao, LI Li. Integration of soft intelligent textile and functional fiber[J]. Journal of Textile Research, 2018,39(5):165-174.
[2] 陈志林. 智能服装开发与应用现状[J]. 纺织科技进展, 2010(2):88-93.
CHEN Zhilin. Development and application of prospect smart clothing[J]. Progress in Textile Science & Technology, 2010(2):88-93.
[3] 吴琼, 张观广, 陈皇星, 等. 柔性电致变色材料的研究与发展[J]. 功能材料, 2019,50(10):10040-10046.
WU Qiong, ZHANG Guanguang, CHEN Huangxing, et al. The state-of-the-art flexible electrochromic mate-rial[J]. Journal of Functional Materials, 2019,50(10):10040-10046.
[4] 冯博学, 陈冲, 何毓阳, 等. 电致变色材料及器件的研究进展[J]. 功能材料, 2004,35(2):145-150.
FENG Boxue, CHEN Chong, HE Yuyang, et al. Advance in research on electrochromic materials and devices[J]. Journal of Functional Materials, 2004,35(2):145-150.
[5] AHMAD F, JAMIL M, JEON Y J. Advancement trends in dye-doped polymer dispersed liquid crystals:a survey review[J]. Molecular Crystals and Liquid Crystals, 2017,648(1):88-113.
doi: 10.1080/15421406.2017.1301860
[6] 吕奎. 液晶微胶囊的制备与显示应用性能研究[D]. 天津:天津大学, 2012: 6-19.
LÜ Kui. Study on the preparation of liquid crystal microcapsules and their applied performances in dis-plays[D]. Tianjin: Tianjin University, 2012: 6-19.
[7] KIM M, PARK K J, SEOK S, et al. Fabrication of microcapsules for dye-doped polymer-dispersed liquid crystal-based smart windows[J]. ACS Applied Materials & Interfaces, 2015,7(32):17904-17909.
pmid: 26192469
[8] CHEN K F, WANG F H, CHAN L H, et al. Multicolor polymer disperse microencapsulated liquid crystal displays[J]. Journal of Display Technology, 2009,5(6):184-187.
doi: 10.1109/JDT.2009.2013485
[9] 郝鸿飞, 刘晓艳. 胆固醇液晶热致变色微胶囊的制备及其性能[J]. 纺织学报, 2017,38(6):75-79.
HAO Hongfei, LIU Xiaoyan. Preparation and properties of thermotropic cholesterol liquid crystal microcap-sules[J]. Journal of Textile Research, 2017,38(6):75-79.
[10] SHENG M, ZHANG L, WANG D, et al. Fabrication of dye-doped liquid crystal microcapsules for electro-stimulated responsive smart textiles[J]. Dyes and Pig-ments, 2018,158:1-11.
[11] SHENG M, ZHANG L, GUAN Y, et al. The photoelec-tric properties characteristics of dye-doped nematic liq-uid crystal microcapsules with different structural com-position[J]. Journal of Molecular Liquids, 2019,283:816-822.
doi: 10.1016/j.molliq.2019.03.138
[1] CHEN Yunbo, ZHU Xiangyu, LI Xiang, YU Hong, LI Weidong, XU Hong, SUI Xiaofeng. Recent advance in preparation of thermo-regulating textiles based on phase change materials [J]. Journal of Textile Research, 2021, 42(01): 167-174.
[2] WANG Liang, MA Xiaoguang, LI Junjun, YANG Zhou. Development and application of color change chromatography with thermochromic microcapsules [J]. Journal of Textile Research, 2020, 41(09): 88-94.
[3] PANG Yali, MENG Jiayi, LI Xin, ZHANG Qun, CHEN Yankun. Preparation of graphene fibers by wet spinning and fiber characterization [J]. Journal of Textile Research, 2020, 41(09): 1-7.
[4] ZHAO Zhiqi, LI Qiujin, SUN Yuejing, GONG Jixian, LI Zheng, ZHANG Jianfei. Application of magnetic-graphene oxide/poly(allylamine hydrochloride) microcapsules for adsorption of dyes [J]. Journal of Textile Research, 2020, 41(07): 109-116.
[5] WANG Sen, CHEN Ying. Preparation of nano-TiO2 stabilized emulsion and its application in microencapsulation [J]. Journal of Textile Research, 2020, 41(05): 105-111.
[6] YANG Fan, LIU Junhua, BIAN Angting, WANG Yanping, QIAN Qiyuan, NI Jianhua, XIA Yumin, HE Yong, WANG Yimin. Influence of heat treatment on structure and properties of thermotropic liquid crystalline polyarylate fiber [J]. Journal of Textile Research, 2019, 40(11): 9-12.
[7] YANG Jian, ZHANG Guoqing, LIU Guojin, KE Xiaoming, ZHOU Lan. Preparation of composite phase change microcapsules and its application on cotton fabrics [J]. Journal of Textile Research, 2019, 40(10): 127-133.
[8] ZHANG Zhibin, LI Gang, MAO Senxian, LI Xunxun, CHEN Yushuang, MAO Qingshan, LI Yi, PAN Zhijuan, WANG Xiaoqin. Preparation and antibacterial activity of silk fibroin/chitosan microspheres [J]. Journal of Textile Research, 2019, 40(10): 7-12.
[9] XIANG Wei, YANG Honglin, QUAN Qiongying. Preparation and application of polyacrylate/rhodamine B composite latex by miniemulsion polymerization [J]. Journal of Textile Research, 2019, 40(09): 122-127.
[10] CHEN Xu, WU Bingyang, FAN Ying, YANG Musheng. Numerical simulation of low temperature protection process for heat storage fabrics [J]. Journal of Textile Research, 2019, 40(07): 163-168.
[11] LIU Bingqian, SHENG Dan, PAN Heng, CAO Genyang. Influence of N,N-dimethylacetamide/CaCl2 system on structure and properties of thermotropic liquid crystal polyarylate fibers [J]. Journal of Textile Research, 2019, 40(04): 15-20.
[12] CAO Jiliang, XU Licong, MENG Chunli, LI Xiaochun. Electric conductivity of cotton fabrics by graphene UV curable coating [J]. Journal of Textile Research, 2019, 40(02): 135-140.
[13] LIU Fei, LI Qiujin, GONG Jixian, LI Zheng, LIU Xiuming, ZHANG Jianfei. Polysaccharide microcapsules via layer-by-layer assembly for cotton fabric as sustained release vessel [J]. Journal of Textile Research, 2019, 40(02): 114-118.
[14] . Electrical conductivity of silk fabrics finished with graphene [J]. Journal of Textile Research, 2018, 39(12): 84-88.
[15] . Preparation and application of antimicrobial mug wort oil-chitosan microcapsules [J]. Journal of Textile Research, 2018, 39(10): 99-103.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
京ICP备14006648号
Copyright 2021 © Editorial office of Journal of Textile Research
Supported by Beijing Magtech Co.Ltd