CN-122013542-A - One-step preparation process of pyroelectric intelligent induction skin based on electrostatic spinning technology

CN122013542ACN 122013542 ACN122013542 ACN 122013542ACN-122013542-A

Abstract

The invention discloses a one-step preparation process of a pyroelectric intelligent induction skin based on an electrostatic spinning technology, which comprises the steps of dissolving a pyroelectric material and a high-conductivity nano doping agent in a mixed solvent, uniformly stirring, standing and defoaming to obtain a spinning solution, injecting the spinning solution into an electrostatic spinning device, taking a flexible substrate as a receiving substrate, carrying out electrostatic spinning under the action of a high-voltage electrostatic field, stretching and solidifying the spinning solution into nano fibers, simultaneously forming a high-content pyroelectric active beta crystalline phase in situ, directly depositing the nano fibers on the surface of the flexible substrate to form a nano fiber functional layer, preparing an electrode layer on the surface of the nano fiber functional layer, and leading out an electric signal to obtain the pyroelectric intelligent induction skin.

Inventors

HOU YUYAN
ZHANG PENG
ZHANG WANFENG
CAO WEINAN
CHEN HUANGJIE

Assignees

安安(中国)有限公司

Dates

Publication Date: 20260512
Application Date: 20260316

Claims (7)

1. A pyroelectric intelligent induction skin one-step preparation process based on an electrostatic spinning technology is characterized by comprising the following steps: (1) Preparing a precursor solution, namely dissolving a pyroelectric material and a high-conductivity nano doping agent in a mixed solvent, uniformly stirring, standing and defoaming to obtain a spinning solution; (2) Injecting spinning solution into an electrostatic spinning device, taking a flexible substrate as a receiving substrate, carrying out electrostatic spinning under the action of a high-voltage electrostatic field, stretching and solidifying the spinning solution into nano fibers, simultaneously forming a high-content pyroelectric active beta crystalline phase in situ, and directly depositing the high-content pyroelectric active beta crystalline phase on the surface of the flexible substrate to form a nano fiber functional layer; (3) And preparing an electrode layer, namely preparing the electrode layer on the surface of the nanofiber functional layer, and leading out an electric signal to obtain the pyroelectric intelligent induction skin.
2. The one-step preparation process of the pyroelectric intelligent induction skin based on the electrostatic spinning technology is characterized in that in the step (1), the pyroelectric material is PVDF-TrFE copolymer, the high-conductivity nano dopant is one or more of nano graphene, carbon nano tube or conductive metal nano particles, and the mixed solvent is composed of DMF and acetone according to a volume ratio of 4:1.
3. The one-step preparation process of the pyroelectric intelligent induction skin based on the electrostatic spinning technology is characterized in that in the spinning solution in the step (1), the solid content of a pyroelectric material is 12% -18%, and the mass fraction of the high-conductivity nano dopant is 0.1% -5% of the mass of the pyroelectric material.
4. The one-step preparation process of the pyroelectric intelligent induction skin based on the electrostatic spinning technology is characterized in that in the step (2), the flexible substrate is a microfiber skin, the electrostatic spinning process parameters are that the voltage is 10-30kV, the receiving distance is 10-20cm, and the spinning solution pushing rate is 0.5-2mL/h.
5. The one-step preparation process of the pyroelectric intelligent induction skin based on the electrostatic spinning technology of claim 1, wherein in the step (3), the electrode layer is prepared by any one of magnetron sputtering and coating of conductive silver paste/silver nanowires.
6. The one-step preparation process of the pyroelectric intelligent induction skin based on the electrostatic spinning technology of claim 1, wherein PVDF-TrFE/nano-dopant composite nano-fiber in the nano-fiber functional layer has a three-dimensional network porous structure.
7. The one-step preparation process of the pyroelectric intelligent induction skin based on the electrostatic spinning technology of claim 1, wherein the nanofiber functional layer forms physical interweaving or mechanical interlocking combination with the flexible substrate at the interface through an electrostatic spinning in-situ growth mode.

Description

One-step preparation process of pyroelectric intelligent induction skin based on electrostatic spinning technology Technical Field The invention relates to the technical field of synthetic leather, in particular to a one-step preparation process of a pyroelectric intelligent induction skin based on an electrostatic spinning technology. Background Currently, flexible electronic and man-machine interaction interfaces are developing towards light weight, integration and low power consumption. The pyroelectric material can directly convert temperature change into an electric signal, and an ideal path is provided for passive and self-driven sensing. The traditional pyroelectric intelligent induction skin is usually required to be independently prepared and then induced to form a high-grade beta crystalline phase through additional post-treatment steps such as physical stretching or high-voltage polarization, and finally is attached to a flexible substrate through an adhesive, so that the problems of weak interface binding force, poor flexibility, complex process and the like exist. Disclosure of Invention Aiming at the problems of complex preparation process, weak interface binding force, poor flexibility and the like of the pyroelectric intelligent induction skin in the prior art, the invention provides a one-step preparation process of the pyroelectric intelligent induction skin based on an electrostatic spinning technology, which integrates the preparation of a nanofiber skin, in-situ polarization of beta crystalline phase and firm combination with a substrate into a single process, simplifies the process flow and improves the interface binding strength and pyroelectric performance. In order to achieve the purpose, the invention is realized by the following technical scheme that the pyroelectric intelligent induction skin one-step preparation process based on the electrostatic spinning technology comprises the following steps: (1) Preparing a precursor solution, namely dissolving a pyroelectric material and a high-conductivity nano doping agent in a mixed solvent, uniformly stirring, standing and defoaming to obtain a spinning solution; (2) Injecting spinning solution into an electrostatic spinning device, taking a flexible substrate as a receiving substrate, carrying out electrostatic spinning under the action of a high-voltage electrostatic field, stretching and solidifying the spinning solution into nano fibers, simultaneously forming a high-content pyroelectric active beta crystalline phase in situ, and directly depositing the high-content pyroelectric active beta crystalline phase on the surface of the flexible substrate to form a nano fiber functional layer; (3) And preparing an electrode layer, namely preparing the electrode layer on the surface of the nanofiber functional layer, and leading out an electric signal to obtain the pyroelectric intelligent induction skin. Further, in the step (1), the pyroelectric material is PVDF-TrFE copolymer, the high-conductivity nano dopant is one or more of nano graphene, carbon nano tube or conductive metal nano particles, and the mixed solvent consists of DMF and acetone according to a volume ratio of 4:1. Further, in the spinning solution in the step (1), the solid content of the pyroelectric material is 12% -18%, and the mass fraction of the high-conductivity nano dopant is 0.1% -5% of the mass of the pyroelectric material. In the step (2), the flexible substrate is a microfiber skin, the electrostatic spinning process parameters are that the voltage is 10-30kV, the receiving distance is 10-20cm, and the spinning solution pushing rate is 0.5-2mL/h. Further, in the step (3), the electrode layer is prepared by any one of magnetron sputtering and coating of conductive silver paste/silver nanowires. Furthermore, in the nanofiber functional layer, PVDF-TrFE/nano-dopant composite nanofibers have a three-dimensional network porous structure. Further, the nanofiber functional layer forms physical interweaving or mechanical interlocking combination with the flexible substrate at the interface through an electrostatic spinning in-situ growth mode. The invention provides a one-step preparation process of a pyroelectric intelligent induction skin based on an electrostatic spinning technology, and the core innovation is to provide a one-step electrostatic spinning integrated process, which combines the traditional processes of film preparation firstly and post-treatment (such as stretching, polarization and lamination) which are required to be finished in multiple steps into a single process, and synchronously completes the formation of functional crystalline phases and interface combination while preparing a nanofiber skin. The beneficial technical effects are embodied in the following three aspects: 1. The process is integrated. Through accurately regulating and controlling electrostatic spinning parameters (such as voltage, distance and solvent ratio), PVDF-TrFE nanofiber