CN110936686B - Flexible electronic product based on elastic shape memory polymer - Google Patents

Flexible electronic product based on elastic shape memory polymer Download PDF

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Publication number
CN110936686B
CN110936686B CN201911258901.XA CN201911258901A CN110936686B CN 110936686 B CN110936686 B CN 110936686B CN 201911258901 A CN201911258901 A CN 201911258901A CN 110936686 B CN110936686 B CN 110936686B
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film
shape memory
memory polymer
elastic
elastic shape
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CN110936686A (en
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王韬熹
黄为民
黄赟
沈星
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
    • G06K19/022—Processes or apparatus therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0313—Organic insulating material
    • H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0393—Flexible materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/08—PCBs, i.e. printed circuit boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2519/00—Labels, badges
    • B32B2519/02—RFID tags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

The invention relates to a manufacturing technology of a flexible electronic product, in particular to a flexible electronic product based on an elastic shape memory polymer. The flexible electronic product based on elastic shape memory polymer of the invention comprises: film-like electronic devices having a polymer or paper substrate; the film-shaped electronic device is sandwiched between the two elastic shape memory polymer films and is bonded into a whole through glue or hot pressing. The invention can improve the stretchability of the film-shaped flexible electronic equipment, thereby solving the problem that the film-shaped flexible electronic equipment is easy to damage after being subjected to large deformation, enabling the flexible electronic hot standby to have the shape memory effect, and realizing the local attachment with an object or a human body.

Description

Flexible electronic product based on elastic shape memory polymer
Technical Field
The invention relates to a manufacturing technology of a flexible electronic product, in particular to a flexible electronic product based on an elastic shape memory polymer.
Background
Shape memory materials (including some alloys and polymeric materials, etc.) are able to recover their original shape under the appropriate stimulus after severe or quasi-plastic deformation, a phenomenon known as the shape memory effect. The main recovery conditions affecting shape memory polymers are temperature, light or humidity, etc. Depending on the nature of the different polymers, the pre-deformation of the thermally driven shape memory polymer can be carried out either at normal temperature or by heating above its transition temperature (glass transition temperature or melting temperature). For thermally actuated shape memory polymers, they can be restored from a pre-deformed configuration to an original shape by heating. Whereas for chemically actuated shape memory polymers, the recovery of the deformation is triggered by contact with a particular chemical solution.
Flexible electronics is a generic term for a technology, an emerging electronic technology for fabricating organic/inorganic material electronic devices on flexible/ductile substrates. Electronic devices manufactured using such techniques are referred to as flexible electronic devices/products. Compared with the traditional electronic product, the flexible electronic product has higher flexibility, can adapt to different working environments to a certain extent, and meets the deformation requirement of use. The corresponding technical requirements have also restricted the development of flexible electronic devices. Flexible electronic devices generally need to have excellent stretchability and bendability without damaging their own electronic properties, which poses new challenges and requirements for circuit fabrication materials. A considerable portion of film-like electronic devices on the market today already have a certain flexibility, but research on how to greatly improve their flexibility and achieve stretchability is still in the early stages of investigation, and no relatively mature and stable solution has emerged so far.
The invention aims to solve the technical problem of providing a flexible electronic product based on elastic shape memory polymer and a use method thereof, which can realize the flexibility and the stretchability of the integral structure of a film-shaped electronic product, so that the stretchability of film-shaped flexible electronic equipment can be improved, the problem that the film-shaped flexible electronic equipment is easily damaged after being subjected to large deformation is solved, the flexible electronic hot equipment has the shape memory effect, and the local attachment with an object or a human body can be realized.
The flexible electronic product based on elastic shape memory polymer of the invention comprises:
film-like electronic devices having a polymer or paper substrate;
the film-shaped electronic device is sandwiched between the two elastic shape memory polymer films and is bonded into a whole through glue or hot pressing.
The scheme ensures that the protected electronic product has overall flexibility and is not easy to damage under the conditions of bending, folding and twisting.
Further, the elastic shape memory polymer film is bonded to a film-shaped electronic device having a polymer or paper substrate into a single body after being pre-deformed by being stretched in one or two directions at or above a transition temperature at or above room temperature, and has a one-way or two-way wavy/wrinkled shape of an overall shape resulting from recovery of the elastic shape memory polymer film by heating to or above a shape recovery temperature of the elastic shape memory polymer film, so that the overall structure is flexible and stretchable.
Further, the substrate material of the film-shaped electronic device is a shape memory polymer, and the permanent shape of the film-shaped electronic device with the substrate is a unidirectional or bidirectional wave (which can be a sine wave, a triangular wave, a three-pump folded shape, etc.); the film-shaped electronic device is bonded between elastic shape memory polymer films after the shape of the polymer substrate is pressed flat and pre-deformed at or above the transition temperature of the room temperature or above, and the overall shape has a wave shape formed by the recovery deformation caused by heating to the transition temperature of the substrate material and/or the elastic shape memory polymer film or above. The wave shape realizes the flexibility and the stretchability of the whole structure of the electronic product.
Further, the base material of the film-shaped electronic device is a shape memory polymer, the film-shaped electronic device is bonded between the elastic shape memory polymer films after being pre-deformed in the width or thickness direction at or above the transition temperature of the shape of the polymer base at or above room temperature, and the overall shape has a wave shape formed by being heated to or above the transition temperature of the base material and/or the elastic shape memory polymer film to be restored and deformed. The recovery deformation of the base material in the width or thickness direction may serve to control the corrugation profile as the shape is retracted.
Further, the thickness of the elastic shape memory polymer film ranges from 0.005 mm to 10 mm; the material is selected from one or a mixture of more of Polyurethane (PU), Thermoplastic Polyurethane (TPU), ethylene-vinyl acetate copolymer (EVA), thermoplastic rubber (TPR), Polycaprolactone (PCL), poly adipic acid-1, 4-butanediol ester diol (PBA), elastic rubber or silica gel, Polycaprolactone (PCL) and poly adipic acid-1, 4-butanediol ester diol (PBA).
Further, the elastic shape memory polymer film has a tensile strain range of a unidirectional or bidirectional tensile pre-deformation of 5% to 300%.
Further, the film-shaped electronic device having a polymer or paper substrate is one of an RFID tag, a thin film printed circuit board, a thin film battery panel, and a thin film sensor.
The flexible electronic product based on elastic shape memory polymer of the present invention can be used as follows: the flexible electronic product based on the elastic shape memory polymer is heated to the transition temperature of the substrate material and/or the elastic shape memory polymer film or above, then the shape of the flexible electronic product is made to be attached to the local surface of the object or the human body, the shape constraint is kept, and the temperature is reduced to be below the transition temperature of the substrate material and the elastic shape memory polymer film, so that the pre-deformation shape attached to the surface of the object or the human body is formed.
The pre-deformation referred to in the present invention means a temporary shape formed by a shape memory polymer having a thermally driven shape memory effect at or above its transition temperature (glass transition temperature or melting temperature) by applying an external force to restrain the polymer from deforming and lowering the temperature to below the transition temperature while maintaining the external force restraint. The permanent shape referred to herein is the initial shape of the shape memory polymer prior to pre-deformation. The shape memory polymer after the pre-deformation is deformed to recover its shape at or above the recovery temperature.
The scheme for realizing the flexibility of the film-shaped electronic equipment mainly utilizes the shape memory effect of the elastic polymer material, the shape recovery of the elastic polymer material causes the embedded film-shaped electronic equipment to be pressed, and the embedded film-shaped electronic equipment forms folds after mechanical instability is generated, so that the stretchability of the electronic equipment is realized. The scheme has the advantages of simple design, low cost and easy batch production. Moreover, the process of embedding the film-shaped electronic equipment in the elastic shape memory polymer film in the market can be regarded as packaging a layer of elastic film of the electronic equipment, so that electronic components in the electronic equipment are not easily damaged when the electronic equipment is bent, folded, stretched or even impacted by the outside, and the electronic equipment is well protected.
Drawings
FIG. 1 is a schematic diagram of the preparation process of examples 1 and 2 of the present invention;
FIG. 2 is a schematic diagram of the preparation process of examples 3 and 4 of the present invention;
FIG. 3 is a schematic diagram of the preparation process of examples 5 to 8 of the present invention;
FIG. 4 is a schematic diagram of the preparation process of example 9 of the present invention;
FIG. 5 is a schematic view of the preparation process of example 10 of the present invention;
FIG. 6 is a schematic diagram of the preparation process of example 11 of the present invention.
Description of reference numerals:
1-3 wherein 1 represents an elastic shape memory polymer film and 2 represents a film-like electronic device; in FIG. 2, c is the case where the elastic shape memory polymer film is thin, and d is the case where the elastic shape memory polymer film is thick; in FIG. 3, e is the case where the elastic shape memory polymer film is thin, and f is the case where the elastic shape memory polymer film is thick.
Detailed Description
Example 1:
FIG. 1 is a schematic diagram of the process for preparing a shape memory flexible temperature sensor based on elastic shape memory polymer in example 1 of the present invention. With reference to fig. 1, the method for manufacturing and using the shape memory flexible temperature sensor comprises the following steps:
(1) firstly, two Polyurethane (PU) films with the thickness of 1 mm are taken, and the glass transition temperature of the two films is 60oC, melting temperature of 150oC, the Young modulus at room temperature is 22 MPa;
(2) placing a film-shaped temperature sensor between two polyurethane films, as shown in a in fig. 1, wherein at this time, the elastic shape memory polymer film 1 is the polyurethane film, and the film-shaped electronic device 2 is the film-shaped temperature sensor;
(3) heating the polyurethane film to 160 deg.CoC, hot pressing to integrate it with the temperature sensor, followed by cooling, i.e. as shown in fig. 1 b;
(4) and after the temperature is reduced to the room temperature, the shape memory flexible temperature sensor is manufactured. Because of the good elasticity of the polyurethane film, the film-shaped temperature sensor packaged in the film-shaped temperature sensor has good bending, folding and twisting performances;
(5) heating to 70 deg.CoSoftening the polyurethane film, reshaping the flexible temperature sensor to fit the shape required by a specific application, and cooling to room temperature to fix the shape;
(6) the flexible temperature sensor is heated again to 70 deg.foAnd C, activating the shape memory effect of the polyurethane film to restore the shape of the polyurethane film to the shape prepared before.
The steps (5) and (6) can be repeated.
Example 2
Referring to fig. 1, the manufacturing and using method of the shape memory flexible printed circuit board based on elastic shape memory polymer includes the following contents:
(1) firstly, two pieces of cross-linked Polycaprolactone (PCL) film with the thickness of 1.5 mm are taken, and the melting temperature is 65oC, the Young modulus at room temperature is 31 MPa;
(2) placing a film-shaped printed circuit board between two polycaprolactone films, as shown in a in figure 1, wherein at this time, the elastic shape memory polymer film 1 is the polycaprolactone film, and the film-shaped electronic device 2 is the film-shaped printed circuit board;
(3) dissolving the surfaces of the two polycaprolactone films by using an acetone solution, and then bonding the polycaprolactone films and the film-shaped printed circuit board into a whole, as shown in a b in the figure 1;
(4) and completing the manufacture of the shape memory flexible circuit. Due to the good elasticity of the polycaprolactone film, the film-shaped printed circuit packaged in the polycaprolactone film has good bending, folding and twisting properties;
(5) heating to 68 deg.CoSoftening the polycaprolactone film, and reshaping the flexible circuit to fit the shape of a specific part of the body at about body temperature and fixing the shape;
(6) the flexible circuit is again heated to 68 deg.foAnd C, activating the shape memory effect of the polycaprolactone film to restore the shape of the polycaprolactone film to the previously prepared shape.
The steps (5) and (6) can be repeated.
Example 3
Fig. 2 can be a schematic diagram of a process for preparing a shape memory flexible solar panel based on an elastic shape memory polymer according to embodiment 3 of the present invention. With reference to fig. 2, the manufacturing and using method of the shape memory flexible solar cell panel based on the elastic shape memory polymer includes the following steps:
(1) firstly, two silica gel-Thermoplastic Polyurethane (TPU) mixture films with the thickness of 5.0 mm are taken, and the melting temperature of the TPU is 60oC, the Young modulus at room temperature is 5.5 MPa;
(2) two films of the silicone-thermoplastic polyurethane mixture were laminated at 70oStretching for 20% under C, fixing and cooling;
(3) placing a film-shaped solar panel between two pre-stretched silica gel-thermoplastic polyurethane mixture films; as shown in a and b in fig. 2, at this time, the elastic shape memory polymer film 1 is the above-mentioned silica gel-thermoplastic polyurethane mixture film, and the film-shaped electronic device 2 is the above-mentioned film-shaped solar panel;
(4) and bonding the two silica gel-thermoplastic polyurethane films with the silica gel to form a whole with the solar panel. As shown in fig. 2 b. The silica gel-thermoplastic polyurethane mixture film has good elasticity, so that the film-shaped solar cell panel packaged in the film-shaped solar cell panel has good bending, folding and twisting properties;
(5) heating to 70 deg.CoAnd C, activating the shape memory effect of the silica gel-thermoplastic polyurethane mixture film to destabilize the film-shaped solar cell panel encapsulated therein, so as to form folds, namely, completing the manufacturing of the shape memory flexible solar cell panel as shown in C or d in figure 2. Due to the wrinkling phenomenon of the film-shaped solar panel, the film-shaped solar panel has stretchability, and the maximum elastic stretching limit is 40%;
(6) heating to 70 deg.CoC, softening the silica gel-thermoplastic polyurethane mixture film, cooling to a temperature near the temperature of a human body, and adhering the film to the surface of the human body to fix the shape to form a wearable flexible solar cell panel which is fit with the size of the individual;
(7) heating again to 70 deg.CoC, the shape of which is restored to the previously prepared form.
The steps (6) and (7) can be repeated.
Example 4
Fig. 2 is a schematic diagram of the process for preparing the shape memory flexible RFID tag based on elastic shape memory polymer according to example 4 of the present invention. With reference to fig. 2, the manner of making and using the shape memory flexible RFID tag based on elastic shape memory polymer includes the following:
(1) firstly, two thermoplastic rubber-ethylene-vinyl acetate copolymer (EVA) mixture films with the thickness of 0.3 mm are taken, and the melting temperature of the ethylene-vinyl acetate copolymer is 70oC, Young's modulus at room temperature of 25 MPa, and melting point of thermoplastic rubber of 100oC；
(2) Two thermoplastic rubber-ethylene-vinyl acetate copolymer mixture films were heated to 75 deg.CoPre-stretching 100% after C, and cooling to room temperature after fixing;
(3) placing a film-shaped RFID label between two pre-stretched thermoplastic rubber-ethylene-vinyl acetate copolymer mixture films; as shown in a and b in fig. 2, at this time, the elastic shape memory polymer film 1 is the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film, and the film-shaped electronic device 2 is the film-shaped RFID tag;
(4) the surfaces of two sheets of thermoplastic rubber-ethylene-vinyl acetate copolymer mixture films were dissolved with a Dimethylformamide (DMF) solution and then bonded to be integrated with the RFID tag. As shown in fig. 2 b. The thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film has good elasticity, so that the film-shaped RFID label packaged in the thermoplastic rubber-ethylene-vinyl acetate copolymer film has good bending, folding and twisting properties;
(5) heating to 75 deg.CoAnd C, the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film is shrunk in shape to cause overall destabilization and wrinkling, and the film-shaped RFID label encapsulated in the thermoplastic rubber-ethylene-vinyl acetate copolymer film is also destabilized and wrinkled, namely, as shown in C or d in figure 2, the shape memory flexible RFID label is manufactured. Due to the corrugation of the film-shaped RFID label, the film-shaped RFID label has stretchability, and the maximum elastic stretching limit is 10%;
(6) heating to 75 deg.CoSoftening the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film, and after cooling to a temperature close to the temperature of a human body, adhering the film to the surface of the human body for fixation to form a wearable flexible RFID label with a size suitable for the individual;
(7) the flexible circuit is heated again to 75oAnd C, activating the shape memory effect of the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film, and restoring the shape of the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film to the shape prepared before.
The steps (6) and (7) can be repeated.
Example 5
FIG. 3 is a schematic diagram of the process of manufacturing shape memory flexible printed circuit based on elastic shape memory polymer in example 5 of the present invention. With reference to fig. 3 (a to f in fig. 3 correspond to (2) to (8) in the following description), the manner of making and using the shape memory flexible printed circuit based on the elastic shape memory polymer includes the following:
(1) printing a circuit on the surface of a polyethylene terephthalate (PET) substrate, and finishing the manufacturing of a film-shaped printed circuit;
(2) heating the film-like printed circuit to 240oC (close to the melting start temperature of the polyethylene terephthalate substrate), hot-pressed into a sine wave shape as a permanent shape, and then cooled to room temperature; as shown in fig. 3 a, in this case, the film-like electronic device 2 is the film-like printed circuit;
(3) the sine wave-shaped film-shaped printed circuit is arranged at 100oC (higher than the glass transition temperature of the polyethylene terephthalate substrate) is hot-pressed to be flat as a temporary shape, followed by cooling to room temperature; as shown in fig. 3 b;
(4) two Thermoplastic Polyurethane (TPU) films having a thickness of 2 mm are taken, the glass transition temperature of the TPU film being 66oC, melting point 140oC, the Young modulus at room temperature is 18 MPa;
(5) two sheets of thermoplastic polyurethane film were heated to 70 deg.foPre-stretching for 150% after C, and cooling to room temperature after fixing;
(6) placing the prepared film-shaped printed circuit between two thermoplastic polyurethane films; as shown in c and d in fig. 3, at this time, the elastic shape memory polymer film 1 is the thermoplastic polyurethane film, and the film-shaped electronic device 2 is a film-shaped printed circuit;
(7) the surface of the thermoplastic polyurethane is dissolved with a solution of Dimethylformamide (DMF) and subsequently bonded to form a body with the printed circuit. I.e. as indicated by d in figure 3. The thermoplastic polyurethane film has good elasticity, so that the film-shaped printed circuit packaged in the thermoplastic polyurethane film has good bending, folding and twisting performances;
(8) heating to 100 deg.CoC, activating the shape memory effect of thermoplastic polyurethane and polyethylene terephthalate, and forming a thermoplastic polyurethane filmThe shape returns to the state before pre-stretching. The shape of the film-shaped printed circuit is restored to the sine wave shape, i.e. e or f in fig. 3, and the fabrication of the shape memory flexible printed circuit is completed. Due to the sine wave shape of the film-shaped printed circuit, the film-shaped printed circuit has stretchability, and the maximum elastic stretching limit is 80 percent;
(9) heating to 70 deg.CoSoftening the thermoplastic polyurethane film, reshaping the manufactured flexible printed circuit to fit the shape required by specific application, and cooling to room temperature to fix the shape;
(10) the flexible circuit is heated again to 70 deg.foAnd C, activating the shape memory effect of the thermoplastic polyurethane film to restore the shape of the thermoplastic polyurethane film to the previously prepared shape.
Steps (9) and (10) can be repeated.
Example 6
Fig. 3 is a schematic diagram of a process for manufacturing a shape memory flexible pressure sensor based on elastic shape memory polymer according to embodiment 6 of the present invention. With reference to fig. 3, the manner of making and using the shape memory flexible pressure sensor based on elastic shape memory polymer includes the following:
(1) adhering the components of the pressure sensor to the surface of a Polyimide (PI) substrate to complete the manufacture of the film-shaped pressure sensor
(2) Heating the film-shaped pressure sensor to 380oAfter C (close to the melting initial temperature of a Polyimide (PI) substrate), hot-pressing the substrate into a bidirectional three-pump folded shape as a permanent shape, and then cooling the permanent shape to room temperature; as shown in a in fig. 3, the film-shaped electronic device 2 is the film-shaped pressure sensor;
(3) a three-pump folded membrane-like pressure sensor was used at 250oC (higher than the glass transition temperature of the Polyimide (PI) substrate) is hot-pressed to be flat as a temporary shape, followed by cooling to room temperature; as shown in fig. 3 b;
(4) taking two pieces of silica gel-Polyurethane (PU) mixture film (refer to the preparation process of patent CN 106832940A) with thickness of 0.4 mm, and the melting temperature of polyurethane is 75oC, Young's modulus at room temperatureIs 28 MPa;
(5) two pieces of silica gel-polyurethane film were placed at 75 deg.CoPre-stretching for 250% under C, fixing and cooling to room temperature;
(6) placing the prepared film-shaped pressure sensor between two silica gel-polyurethane films; referring to fig. 3 c and d, the elastic shape memory polymer film 1 is a silica gel-polyurethane film;
(7) two silicone-polyurethane films are bonded with silicone to form a pressure sensor. The silica gel-polyurethane film has good elasticity, so that the film-shaped pressure sensor packaged in the silica gel-polyurethane film has good bending, folding and twisting performances;
(8) heating to 250 deg.CoAnd C, activating the shape memory effect of the silica gel-polyurethane mixture and the polyimide, and enabling the silica gel-polyurethane film to retract in shape to cause overall unstable wrinkling. The polyimide base shape of the film-shaped pressure sensor returns to the three-pump folded shape, and the manufacturing of the shape memory flexible pressure sensor is completed. I.e. as indicated by e or f in figure 3. The three-pump folding stereo shape of the film-shaped pressure sensor enables the film-shaped pressure sensor to have stretchability, and the maximum elastic stretching limit is 60%;
(9) heating to 80 deg.CoC, softening the silica gel-polyurethane mixture film again, and adhering the silica gel-polyurethane mixture film to the surface of a human body to be solidified to form a wearable flexible pressure sensor which is suitable for the size of an individual after the silica gel-polyurethane mixture film is cooled to the temperature close to the temperature of the human body;
(10) the flexible pressure sensor is heated again to 80 deg.foAnd C, activating the shape memory effect of the silica gel-polyurethane mixture film to restore the shape of the silica gel-polyurethane mixture film to the shape prepared before.
Steps (9) and (10) can be repeated.
Example 7
FIG. 3 is a schematic diagram of a process for manufacturing a shape memory flexible illumination sensor based on elastic shape memory polymer according to embodiment 7 of the present invention. With reference to fig. 3, the manner of making and using the shape memory flexible illumination sensor based on elastic shape memory polymer includes the following:
(1) preparing the illumination sensor on the surface of a polyethylene terephthalate (PET) substrate, and finishing the preparation of the film-shaped illumination sensor;
(2) heating the film-shaped light sensor to 240oC (close to the melting start temperature of the polyethylene terephthalate substrate), hot-pressed into a triangular wave shape as a permanent shape, and then cooled to room temperature; as shown in a of fig. 3, the film-shaped electronic device 2 is the film-shaped illumination sensor;
(3) the triangular wave-shaped film-shaped illumination sensor is arranged at 100oC (higher than the glass transition temperature of the polyethylene terephthalate substrate) is hot-pressed to be flat as a temporary shape, followed by cooling to room temperature; as shown in fig. 3 b;
(4) two Thermoplastic Polyurethane (TPU) films having a thickness of 0.5 mm were taken, the melting starting temperature of the TPU film being 138%oC, glass transition temperature of 70oC, the Young modulus at room temperature is 20 MPa;
(5) placing the manufactured film-shaped illumination sensor between two thermoplastic polyurethane films;
(6) heating the thermoplastic polyurethane film to 140 deg.CoAnd C, then hot pressing to integrate the light sensor. Referring to fig. 3 c and d, the elastic shape memory polymer film 1 is a thermoplastic polyurethane film. The thermoplastic polyurethane film has good elasticity, so that the film-shaped illumination sensor packaged in the thermoplastic polyurethane film has good bending, folding and twisting performances;
(7) heating to 100 deg.CoAnd C, activating the shape memory effect of the polyethylene terephthalate, enabling the illumination sensor to return to a wavy shape, and completing the manufacturing of the shape memory flexible illumination sensor, namely, e or f in fig. 3. Due to the triangular wave shape of the film-shaped light sensor, the film-shaped light sensor has stretchability, and the maximum elastic stretching limit is 50 percent;
(8) heating to 70 deg.CoSoftening the thermoplastic polyurethane film, shaping the manufactured flexible illumination sensor to fit a shape required by a specific application, and cooling to room temperature to fix the shape;
(9) the flexible illumination sensor is heated again to 70 deg.foAnd C, activating the shape memory effect of the thermoplastic polyurethane film to restore the shape of the thermoplastic polyurethane film to the previously prepared shape.
Steps (8) and (9) can be repeated.
Example 8
FIG. 3 is a schematic diagram of a process for manufacturing a shape memory flexible illumination sensor based on elastic shape memory polymer according to embodiment 8 of the present invention. With reference to fig. 3, the manner of making and using the shape memory flexible temperature sensor based on elastic shape memory polymer includes the following:
(1) pasting components of the temperature sensor to the surface of a polyethylene terephthalate (PET) substrate, and finishing the manufacturing of the film-shaped temperature sensor;
(2) heating the film-shaped temperature sensor to 240 deg.CoC (approximate to the melting starting temperature of the polyethylene terephthalate substrate), hot pressing into a three-pump folded shape with two-way stereo, as a permanent shape, and then cooling to room temperature; as shown in a in fig. 3, the film-shaped electronic device 2 is the film-shaped temperature sensor;
(3) a three-pump folded film-shaped temperature sensor is arranged at 100oC (higher than the glass transition temperature of the polyethylene terephthalate substrate) is hot-pressed to be flat as a temporary shape, followed by cooling to room temperature; as shown in fig. 3 b;
(4) taking two silica gel-Polycaprolactone (PCL) mixture films with the thickness of 4 mm, wherein the melting temperature of the PCL is 65oC, the Young modulus at room temperature is 30 MPa;
(5) placing the prepared film-shaped temperature sensor between two silica gel-polycaprolactone films;
(6) two silica gel-polycaprolactone films are bonded by silica gel to form a whole with the temperature sensor. Referring to fig. 3 c and d, the elastic shape memory polymer film 1 is a silica gel-polycaprolactone film. The silica gel-polycaprolactone film has good elasticity, so that the film-shaped temperature sensor packaged in the silica gel-polycaprolactone film has good bending, folding and twisting properties;
(7) heating to 100 deg.CoC, activation ofThe shape memory effect of the ethylene terephthalate, the bottom shape of the ethylene terephthalate of the film-shaped temperature sensor returns to the three-pump folded shape, and the shape memory flexible temperature sensor is completed, i.e. e or f in fig. 3. The three-pump folding stereo shape of the film-shaped temperature sensor enables the film-shaped temperature sensor to have stretchability, and the maximum elastic stretching limit is 100 percent;
(8) heating to 70 deg.CoC, softening the silica gel-polycaprolactone mixture film, and sticking the silica gel-polycaprolactone mixture film to the surface of a human body for further cooling when the silica gel-polycaprolactone mixture film is cooled to be close to the temperature of the human body, so that the silica gel-polycaprolactone mixture film becomes a wearable flexible temperature sensor which is fit for the size of a person;
(9) the flexible temperature sensor is heated again to 70 deg.foAnd C, activating the shape memory effect of the silica gel-polycaprolactone mixture film to restore the shape of the silica gel-polycaprolactone mixture film to the shape prepared before.
The steps (8) and (9) can be repeated.
Example 9
Fig. 4 is a schematic diagram of the preparation process of the shape memory flexible RFID tag based on elastic shape memory polymer in example 9 of the present invention. With reference to fig. 4, the manner of making and using the shape memory flexible RFID tag based on elastic shape memory polymer includes the following:
(1) firstly, two thermoplastic rubber-ethylene-vinyl acetate copolymer (EVA) mixture films with the thickness of 0.3 mm are taken, and the melting temperature of the ethylene-vinyl acetate copolymer is 70oC, Young's modulus at room temperature of 25 MPa, and melting point of thermoplastic rubber of 100oC；
(2) Two thermoplastic rubber-ethylene-vinyl acetate copolymer mixture films were heated to 75 deg.CoPre-stretching 100% after C, and cooling to room temperature after fixing;
(3) as shown in fig. 4 a, the RFID tag in a film shape is formed in a shape with a width varying in one direction, following a rule that the width varies abruptly at regular intervals.
(4) Placing the manufactured RFID label between two pre-stretched thermoplastic rubber-ethylene-vinyl acetate copolymer mixture films;
(5) the surfaces of two sheets of thermoplastic rubber-ethylene-vinyl acetate copolymer mixture films were dissolved with a Dimethylformamide (DMF) solution and then adhered to be integrated with the RFID tag, as shown by b in fig. 4. The thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film has good elasticity, so that the film-shaped RFID label packaged in the thermoplastic rubber-ethylene-vinyl acetate copolymer film has good bending, folding and twisting properties;
(6) heating to 75 deg.CoAnd C, the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film retracts in shape, as shown in a figure 4C, and the film-shaped RFID label encapsulated in the thermoplastic rubber-ethylene-vinyl acetate copolymer film is unstable, but the specific widening shape of the film-shaped RFID label is changed, so that regular wavy wrinkles are generated, and the shape memory flexible RFID label is manufactured. Due to the corrugation of the film-shaped RFID label, the film-shaped RFID label has stretchability, and the maximum elastic stretching limit is 25%;
(7) heating to 75 deg.CoSoftening the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film, and after cooling to a temperature close to the temperature of a human body, adhering the film to the surface of the human body for fixation to form a wearable flexible RFID label with a size suitable for the individual;
(8) the flexible circuit is heated again to 75oAnd C, activating the shape memory effect of the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film, and restoring the shape of the thermoplastic rubber-ethylene-vinyl acetate copolymer mixture film to the shape prepared before.
Steps (7) and (8) can be repeated.
Example 10
Fig. 5 is a schematic diagram of a process for preparing a shape memory flexible solar cell panel based on an elastic shape memory polymer according to embodiment 10 of the present invention. With reference to fig. 5, the manufacturing and using method of the shape memory flexible solar cell panel based on the elastic shape memory polymer includes the following steps:
(1) firstly, two silica gel-Thermoplastic Polyurethane (TPU) mixture films with the thickness of 5.0 mm are taken, and the melting temperature of the TPU is 60oC, the Young modulus at room temperature is 5.5 MPa;
(2) two films of the silicone-thermoplastic polyurethane mixture were laminated at 70oStretching for 20% under C, fixing and cooling;
(3) as shown in a in fig. 5, a film-shaped solar cell panel is manufactured in a grid shape;
(4) placing a film-shaped solar cell panel between two silica gel-thermoplastic polyurethane mixture films which are pre-stretched in two directions;
(5) two silicone-thermoplastic polyurethane films are bonded with silicone to integrate them with the solar panel as shown in fig. 5 b. The silica gel-thermoplastic polyurethane mixture film has good elasticity, so that the film-shaped solar cell panel packaged in the film-shaped solar cell panel has good bending, folding and twisting properties;
(6) heating to 70 deg.CoAnd C, activating the shape memory effect of the silica gel-thermoplastic polyurethane mixture film, enabling the silica gel-thermoplastic polyurethane mixture film to retract in two directions in shape, enabling the film-shaped solar panel packaged in the silica gel-thermoplastic polyurethane mixture film to be unstable in two directions, but enabling the film-shaped solar panel to generate regular two-way wavy wrinkles due to the special well-shaped shape of the film-shaped solar panel, and completing the manufacturing of the shape memory flexible solar panel as shown in C in figure 5. Due to the wrinkling phenomenon of the film-shaped solar panel, the film-shaped solar panel has stretchability, and the maximum elastic stretching limit is 70 percent;
(7) heating to 70 deg.CoC, softening the silica gel-thermoplastic polyurethane mixture film, cooling to a temperature near the temperature of a human body, and adhering the film to the surface of the human body to fix the shape to form a wearable flexible solar cell panel which is fit with the size of the individual;
(8) heating again to 70 deg.CoC, the shape of which is restored to the previously prepared form.
Steps (7) and (8) can be repeated.
Example 11
FIG. 6 is a schematic diagram of a process for manufacturing a shape memory flexible pressure sensor based on elastic shape memory polymer according to example 11 of the present invention. With reference to fig. 6, the manner of making and using the shape memory flexible pressure sensor based on elastic shape memory polymer includes the following:
(1) firstly, taking two silica gel-Polyurethane (PU) mixture thin films with the thickness of 0.4 mm, wherein the melting temperature of the PU is 75oC, the Young modulus at room temperature is 28 MPa;
(2) two pieces of silica gel-polyurethane film were placed at 75 deg.CoStretching under C by 250%, fixing and cooling;
(3) as shown in a in fig. 6, a film-shaped pressure sensor is manufactured into a shape with a unidirectional variable thickness according to a rule that the thickness is abruptly changed at regular intervals;
(4) placing a film-shaped pressure sensor between two pre-stretched silica gel-polyurethane mixture films;
(5) two silicone-polyurethane films are bonded with silicone to integrate the pressure sensor, as shown in b in fig. 6. The silica gel-polyurethane mixture film has good elasticity, so that the film-shaped pressure sensor packaged in the silica gel-polyurethane mixture film has good bending, folding and twisting properties;
(6) heating to 80 deg.CoAnd C, activating the shape memory effect of the silica gel-polyurethane mixture film, enabling the silica gel-polyurethane mixture film to retract in shape, so that the film-shaped pressure sensor packaged in the silica gel-polyurethane mixture film is unstable, but the silica gel-polyurethane mixture film is specially thickened, so that regular wavy wrinkles are generated, as shown in C in fig. 6, and completing the manufacturing of the shape memory flexible pressure sensor. Due to the wrinkling phenomenon of the film-shaped pressure sensor, the film-shaped pressure sensor has stretchability, and the maximum elastic stretching limit is 90 percent;
(7) heating to 80 deg.CoC, softening the silica gel-polyurethane mixture film, and after cooling to a temperature near the temperature of a human body, adhering the film to the surface of the human body to fix the shape, so that the film becomes a wearable flexible pressure sensor which is suitable for the size of an individual;
(8) heating again to 80 deg.CoC, the shape of which is restored to the previously prepared form.
Steps (7) and (8) can be repeated.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (7)

1. A flexible electronic product based on elastic shape memory polymer, characterized in that: comprises that
A film-like electronic device having a polymer substrate;
the film-shaped electronic equipment is sandwiched between the two elastic shape memory polymer films and is bonded into a whole through glue or hot pressing;
the elastic shape memory polymer film is bonded with a film-shaped electronic device with a polymer substrate into a whole after being stretched and pre-deformed unidirectionally or bidirectionally above a transition temperature above room temperature, and has a unidirectionally or bidirectionally wavy shape that causes the elastic shape memory polymer film to recover and retract due to being heated above a shape recovery temperature of the elastic shape memory polymer film, and thus the elastic shape memory polymer film is deformed in a stretched manner unidirectionally or bidirectionally;
the substrate material of the film-shaped electronic equipment is a shape memory polymer, and the permanent shape of the film-shaped electronic equipment with the substrate is in a unidirectional or bidirectional wave shape; the film-shaped electronic device is bonded between the elastic shape memory polymer films after being pressed and deformed by flattening the whole body above the transition temperature of the shape of the polymer substrate above room temperature, and the whole shape has a wave shape formed by the recovery deformation caused by heating to the transition temperature of the substrate material and the elastic shape memory polymer films.
2. The flexible electronic product based on elastic shape memory polymer of claim 1, wherein: the membrane-shaped electronic device has one or more of a unidirectional or bidirectional wave-shaped permanent shape of sine wave, triangular wave and three-pump folding shape.
3. A flexible electronic product based on elastic shape memory polymer, characterized in that: comprises that
A film-like electronic device having a polymer substrate;
the film-shaped electronic equipment is sandwiched between the two elastic shape memory polymer films and is bonded into a whole through glue or hot pressing;
the elastic shape memory polymer film is bonded with a film-shaped electronic device with a polymer substrate into a whole after being stretched and pre-deformed unidirectionally or bidirectionally above a transition temperature above room temperature, and has a unidirectionally or bidirectionally wavy shape that causes the elastic shape memory polymer film to recover and retract due to being heated above a shape recovery temperature of the elastic shape memory polymer film, and thus the elastic shape memory polymer film is deformed in a stretched manner unidirectionally or bidirectionally;
the film-like electronic device is bonded between elastic shape memory polymer films after being pre-deformed in the width direction at a temperature higher than the transition temperature of the shape of the polymer substrate at room temperature, and has a wave shape formed by being heated to a temperature higher than the transition temperature of the substrate material and/or the elastic shape memory polymer films and then being deformed by recovery.
4. A flexible electronic product based on elastic shape memory polymers according to claim 1 or 3, characterized in that: the thickness range of the elastic shape memory polymer film is 0.005 mm-10 mm; the material is selected from one or more of Polyurethane (PU), Thermoplastic Polyurethane (TPU), ethylene-vinyl acetate copolymer (EVA), thermoplastic rubber (TPR), Polycaprolactone (PCL), poly-1, 4-butanediol adipate glycol (PBA), elastic rubber or silica gel and Polycaprolactone (PCL).
5. A flexible electronic product based on elastic shape memory polymers according to claim 1 or 3, characterized in that: the elastic shape memory polymer film has a tensile strain range of 5-300% of unidirectional or bidirectional stretching pre-deformation.
6. A flexible electronic product based on elastic shape memory polymers according to claim 1 or 3, characterized in that: the film-shaped electronic device with the polymer substrate is one of an RFID label, a thin film printed circuit board, a thin film battery panel and a thin film sensor.
7. A method of using a flexible electronic product based on an elastic shape memory polymer according to claim 1 or 3, characterized in that: the flexible electronic product based on the elastic shape memory polymer is heated to a temperature higher than the transition temperature of the substrate material and/or the elastic shape memory polymer film, then the shape of the flexible electronic product is made to be attached to the local surface of the object or the human body, the shape constraint is kept, and the temperature is reduced to a temperature lower than the transition temperature of the substrate material and the elastic shape memory polymer film, so that a pre-deformed shape attached to the surface of the object or the human body is formed.
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* Cited by examiner, † Cited by third party
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CN107249254A (en) * 2017-04-25 2017-10-13 广东工业大学 A kind of stretchable or bending compound circuit system and preparation method thereof

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* Cited by examiner, † Cited by third party
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107249254A (en) * 2017-04-25 2017-10-13 广东工业大学 A kind of stretchable or bending compound circuit system and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
基于可控有序褶皱的柔性可拉伸有机电致发光器件研究;银达;《中国博士学位论文全文数据库信息科技辑》;20170915;第I135-81页第2章，图2.2-2.5 *

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