Flexible piezoelectric fiber thin film with high output and preparation method thereof

A flexible piezoelectric and fiber film technology, applied in fiber processing, fiber chemical characteristics, electrospinning, etc., to achieve the effect of increasing the content of piezoelectric phase, increasing piezoelectric output, and easy concentration of force

Active Publication Date: 2018-08-24
UNIV OF SCI & TECH BEIJING
View PDF8 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lot of room for improvement in piezoelectric output powe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flexible piezoelectric fiber thin film with high output and preparation method thereof
  • Flexible piezoelectric fiber thin film with high output and preparation method thereof
  • Flexible piezoelectric fiber thin film with high output and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Weigh 0.159g of surface-modified BT fiber in a beaker, add 3.20g of DMF and 2.13g of acetone, ultrasonically disperse for 1h to become a uniform suspension, slowly add 0.94g of dried P(VDF-TrFE ), heat and stir at 30°C for 10h until completely dissolved. Put the obtained spinning solution in a 5mL syringe for electrospinning. The electrospinning device is as follows: figure 1 As shown, the spinning voltage is set to 15kV, the spinning distance is 15cm, the rotation speed of the roller is 1000rpm, the pushing speed is 0.015ml / min, and the 6# needle is used. After 4 hours of continuous electrospinning, the obtained film was dried in a vacuum oven at 40°C for 10 hours to obtain a BT / P (VDF-TrFE) fiber membrane with a content of 5 vol%. figure 2 Shown. It can be seen that the fibers obtained by electrospinning are uniform without beads, and the inorganic fibers are completely wrapped in the polymer matrix to form a sleeve structure. The fibers are arrange...

Example Embodiment

[0028] Example 2

[0029] Weigh 0.318g of surface-modified BT fiber in a beaker, add 6.40g of DMF and 4.26g of acetone, ultrasonically disperse for 1h to become a uniform suspension, slowly add 1.88g of dried P(VDF-TrFE ), heat and stir at 30°C for 10h until completely dissolved. Put the obtained spinning solution in a 10mL syringe for electrospinning. The electrospinning device is as follows: figure 1 As shown, the spinning voltage is set to 15kV, the spinning distance is 15cm, the rotation speed of the roller is 0 and 900rpm, the pushing speed is 0.20ml / min, and the 7# needle is used. Continuous electrospinning was performed for 5 hours, and the obtained film was dried in a vacuum oven at 40°C for 20 hours to obtain BT / P (VDF-TrFE) fiber membrane. image 3 It is the infrared absorption spectrum of the BT / P (VDF-TrFE) fiber membrane when the rotation speed of the roller is 0 and 900 rpm, and the β phase content is 80.4% and 86.9%, respectively. The high speed of the receiving r...

Example Embodiment

[0030] Example 3

[0031] Weigh 0.191g of dopamine surface-modified PZT nanofibers in a beaker, add 3.20g of DMF and 2.13g of acetone, and ultrasonically disperse for 1h to become a uniform suspension, and add 0.94g of dried P(VDF-TrFE) , Heat and stir at 30℃ for 10h to completely dissolve. Put the obtained spinning solution in a 5mL syringe for electrospinning. The electrospinning device is like figure 1 As shown, the spinning voltage is set to 12.5kV, the spinning distance is 15cm, the rotation speed of the roller is 1500rpm, the pushing speed is 0.12ml / min, and the 6# needle is used. The film obtained by continuous electrospinning for 4 hours was dried in a vacuum oven at 40°C for 10 hours to obtain a 5 vol% PZT / P (VDF-TrFE) fiber membrane. Perform infrared test on the obtained film, the results are as follows Figure 4 As shown, the beta phase content of pure P (VDF-TrFE) and PZT / P (VDF-TrFE) fiber membranes are 86.9% and 91.3%, respectively. The nucleating agent of PZT ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Total thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides flexible piezoelectric fiber thin film with high output and a preparation method thereof, and belongs to the technical field of electron composite materials and micro-nano function materials. An electrostatic spinning technology is adopted, and ceramic fibers, conductive fibers and other one-dimensional inorganic materials are taken as filler to prepare polymer-based composite film of a sleeve structure and in directional alignment. The filler core of the fiber composite thin film of the sleeve structure is barium titanate, barium strontium titanate, lead zirconate titanate and other piezoelectric ceramic fibers or silver nanofibers, multiwalled carbon nanotubes and other one-dimensional conductive fillers, and inorganic fillers are wrapped with polymer matrix fibers. The polymer matrix can be polyvinylidene fluoride, polyvinylidene fluoride-trifluoroethylene, polyvinylidene fluoride-trifluoroethylene-hexafluoropropylene and other materials. By adjusting contentand types of the filler, piezoelectric output voltage can reach 20 V, the output current can reach 250 nA. The cokmposite material has the advantages of good flexibility, high piezoelectric output, high sensitivity and light weight, and can be taken as a power supply of wearable equipment and a flexible sensor to detect human activities.

Description

technical field [0001] The invention belongs to the technical field of electronic composite materials and micro-nano functional materials, and relates to a process of electrospinning, a polymer-based sleeve structure using one-dimensional inorganic materials such as piezoelectric ceramic fibers and conductive fibers as fillers, an oriented alignment composite film and its preparation method. The composite material has the characteristics of good flexibility, high piezoelectric output, high sensitivity and light weight. Background technique [0002] Piezoelectric materials refer to crystal materials that generate voltage at both ends when subjected to an external force, and can realize mutual conversion between mechanical energy and electrical energy. Utilizing the characteristics of piezoelectric materials, it can be used to make various sensor elements and micro-nano energy devices. [0003] Barium titanate (BT) and lead zirconate titanate (PZT) are typical piezoelectric ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): D04H1/728D04H1/4318D01D5/00D01F1/10
CPCD01D5/003D01D5/0069D01D5/0076D01D5/0092D01F1/10D04H1/4318D04H1/728
Inventor 胡澎浩赵朝贤郑得昌牛津
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap