Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 32-37.doi: 10.13475/j.fzxb.20181103806

• Fiber Materials • Previous Articles     Next Articles

Optimization design and preparation of nanofiber membrane based flexible pressure sensor

WANG Jie1,2, ZHOU Mingwei1, WANG Bin1,2,3(), LI Xiuyan1   

  1. 1. School of Materials Design and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
    2. Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Institute of Fashion Technology,Beijing 100029, China
    3. Beijing Engineering Research Center of Textile Nanofiber, Beijing Institute of Fashion Technology, Beijing 100029, China
  • Received:2018-11-01 Revised:2019-05-15 Online:2019-11-15 Published:2019-11-26
  • Contact: WANG Bin E-mail:20150010@bift.edu.cn

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Abstract:

In order to obtain a flexible pressure sensor with high sensitivity, simple preparation process, light weight and air permeability, thermoplastic elastomer polyurethane (TPU) electrospun nanofiber membrane was used as a substrate and a dielectric layer and carbon nanotube conductive ink was used as an electrode coating to prepare a sandwich-structured nanofiber membrane-based flexible pressure sensor by ultrasonic welding. The relationship between pressure sensing properties and nanofiber membrane thickness and microstructure was studied. The results show that with the increasing of spinning time, the thickness and the tensile stress of the nanofiber membrane increase, while the elongation at break decreases. In the pressure range of 9.8-49 000 Pa, the sensitivity of the device decreases with the increase of the spinning time. When the spinning time is 1 h, the sensitivity of the device is up to 4.97 kPa-1. The nanofiber membrane-based flexible pressure sensor has the characteristics of high sensitivity and wide response range.

Key words: flexible pressure sensor, nanofiber membrane, electrospinning, thermoplastic elastomer, polyurethane

CLC Number: 

  • TQ340

Fig.1

Schematic of assembly process of flexible pressure sensor"

Fig.2

SEM images of TPU nanofiber membrane with different spinning time"

Fig.3

Diameter profiles of TPU nanofibers with different spinning time"

Fig.4

Thickness of TPU nanofiber membrane with different spinning time"

Fig.5

Stress-strain curves of TPU nanofiber membranes"

Fig.6

Water contact angle of TPU nanofiber membrane with spinning time of 5 h"

Fig.7

Sensitivity profiles of devices constructed by different dielectric layers"

Tab.1

Sensitivities of devices constructed by different die-lectric layers"

纺丝
时间/h		 灵敏度/kPa-1
第1阶段 第2阶段 第3阶段
1 4.97 0.38 0.03
2 3.58 0.25 0.03
3 1.74 0.14 0.02
4 1.11 0.14 0.01
5 0.69 0.08 0.01
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