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Method for preparing piezoelectric polymer functional film with ordered micro-cellular structure by using template

A piezoelectric polymer and microporous structure technology, applied in microstructure technology, microstructure devices, processing microstructure devices, etc., can solve the problem that the mechanical properties and charge storage capacity of porous membranes cannot be effectively controlled or accurately controlled Porous membrane microstructure parameters and other issues, to achieve the effect of simple preparation process

Inactive Publication Date: 2012-03-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation technology cannot precisely control the microstructure parameters of the porous membrane, and furthermore, the mechanical properties and charge storage capacity of the porous membrane cannot be effectively controlled.

Method used

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  • Method for preparing piezoelectric polymer functional film with ordered micro-cellular structure by using template
  • Method for preparing piezoelectric polymer functional film with ordered micro-cellular structure by using template
  • Method for preparing piezoelectric polymer functional film with ordered micro-cellular structure by using template

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Embodiment 1

[0036] please see figure 1 , 3 , 4, 5, 6, 7, 9 and 10. First engrave the cells on the commercially available composite copper plate to make template 4, the cells are square, and the square area is 1mm 2, the spacing between the squares is d=0.5mm, and the concave dimension of the spacing is h=0.5mm. A template 4 with a concave-convex ordered pattern was obtained. Select the PTFE with a porosity of 90% produced by DuPont as the organic polymer film 2-1, get an iron plate (steel plate) as the base plate 6, place the template 4 on the base plate 6, the pattern of the template 4 is upward, and the template 4 The organic polymer film 2-1 is placed on the pattern of the organic polymer film 2-1, and the hard 0.2mm PTFE gasket 5 and the bottom plate 6 are stacked in turn on the organic polymer film 2-1. Then, the pressure is applied under the pressure of 3Mpa for 5s, and then the bottom plate 6 and the bottom plate are removed. Gasket 5, removes organic polymer film 2-1 from temp...

Embodiment 2

[0038] please see figure 2 , 3 , 4, 5, 6, 8, 9 and 11. Composite copper plate template is used, the cells are square, and the square area is 1mm 2 , the spacing between the squares is d=0.5mm, and the concave dimension of the spacing is h=0.5mm. The film 2-1 is made of 25 μm dense PTFE produced by DuPont Company, the gasket 5 is made of rubber, and the pressure is applied under a pressure of 6 MPa for 2 minutes to prepare a double-sided concave-convex pattern ordered porous polymer single-layer film 2-3, followed by hot pressing Process: Place the double-sided concave-convex pattern ordered porous polymer single-layer film 2-3 in the middle of the two dense films, place the protective plate 7 and the hard plate 8 on the upper and lower sides of the two dense films, and the two dense films are high melting point films 1 And low-melting point film 3, high-melting point film 1 and low-melting point film 3 all adopt the dense FEP of 12.5 μm produced by DuPont Company, the pres...

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Abstract

The invention discloses a method for preparing a piezoelectric polymer functional film with an ordered micro-cellular structure by using a template, and relates to a preparation technique of the piezoelectric polymer functional film with the ordered micro-cellular structure. The method firstly prepares a template (4) with a concave-convex ordered pattern, then prepares an ordered porous polymer single-layer thin film (2) which shows a pattern corresponding to the concave-convex ordered pattern of the template (4), then clamps the ordered porous polymer single-layer thin film (2) between two dense films, and carries out hot-pressing to form the piezoelectric polymer functional film with the ordered micropore structure. The method has simple technique, not only can obtain an electromechanical functional film with high thermostability and high pressure flexibility, and has more outstanding advantages of the capability of precisely controlling the microstructure of the film and electric charge of the storing space. The obtained functional film can be used for manufacturing electroacoustic sensors, acoustoelectric sensors, infrasonic wave sensors, ultrasonic sensors, plate loudspeakers, actuators and robot skin and the like, and has wide application prospect in the fields of communication, public security, control, medical treatment, robots, military and the like.

Description

technical field [0001] The invention discloses a method for preparing a piezoelectric polymer functional film with an ordered microporous structure by using a template, and relates to a preparation process for a piezoelectric polymer functional film with an ordered microporous structure. It belongs to the technical field of functional materials. Background technique [0002] Some non-polar microporous polymer films have both piezoelectric and electret properties after proper electric polarization treatment, and are named piezoelectric electret (piezoelectret) or ferroelectret (ferroelectret) , is a new member of the family of electromechanical sensor materials. Piezoelectric electrets are different from traditional piezoelectrics and ferroelectrics in that the material itself is a non-polar material, and its piezoelectric effect is derived from the air gap ionization captured by the two solid medium walls of the hole during the electric polarization process. The charges of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/26B81C5/00B81C3/00H10N30/098
Inventor 张晓青曹功勋潘道胜王学文孙转兰夏钟福
Owner TONGJI UNIV
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