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Composite flexible film with electromagnetic shielding and heat conduction functions and preparation method thereof

An electromagnetic shielding and flexible film technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of easy corrosion, difficulty in meeting lightweight portable electronic products, poor flexibility, etc., to achieve enhanced heat transfer, enhanced absorption and multiple times The ability to internally reflect electromagnetic waves, the effect of a wide range of practical application prospects

Inactive Publication Date: 2021-06-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional electromagnetic shielding materials represented by metals are difficult to meet the needs of the development of lightweight and portable electronic products due to their shortcomings such as high density, poor flexibility, and easy corrosion.

Method used

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  • Composite flexible film with electromagnetic shielding and heat conduction functions and preparation method thereof
  • Composite flexible film with electromagnetic shielding and heat conduction functions and preparation method thereof
  • Composite flexible film with electromagnetic shielding and heat conduction functions and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this embodiment, a two-dimensional heterojunction MXene / BN composite flexible film with both electromagnetic shielding and thermal conductivity functions, see image 3 , using bulk hexagonal boron nitride (h-BN) and bulk multilayer Ti 3 C 2 T x As a raw material, carbon nanocellulose CNF is used as an auxiliary additive material; the bulk hexagonal boron nitride (h-BN) is peeled off by an ultrasonic pulverizer to obtain a boron nitride nanosheet dispersion; Ti 3 C 2 T x The lamellae in the film are peeled off to obtain a few-layer Ti with no more than 3 layers. 3 C 2 T x MXene nanosheets; finally, through the electrostatic interaction of positive and negative charges and hydrogen bonding, the two-dimensional BN nanosheets and two-dimensional Ti 3 C 2 T x MXene nanosheets are constructed into a two-dimensional conductive and thermally conductive heterojunction, and then one-dimensional carbon nanocellulose CNF is added to enhance the mechanical properties ...

Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, especially in that:

[0038] A 2D heterojunction MXene / BN composite flexible film with both electromagnetic shielding and thermal conductivity functions, using bulk hexagonal boron nitride (h-BN) and bulk multilayer Ti 3 C 2 T x As a raw material, carbon nanocellulose CNF is used as an auxiliary additive material; the bulk hexagonal boron nitride (h-BN) is peeled off by an ultrasonic pulverizer to obtain a boron nitride nanosheet dispersion; Ti 3 C 2 T x The lamellae in the film are peeled off to obtain a few-layer Ti with no more than 3 layers. 3 C 2 T x MXene nanosheets; finally, through the electrostatic interaction of positive and negative charges and hydrogen bonding, the two-dimensional BN nanosheets and two-dimensional Ti 3 C 2 T x MXene nanosheets are constructed into a two-dimensional conductive and thermally conductive heterojunction, and then one-dimensional carbon nanocellulose CNF is added t...

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Abstract

The invention discloses a flexible film with electromagnetic shielding and heat conduction functions and a preparation method thereof, a two-dimensional heterojunction MXene / BN flexible film can be formed, a two-dimensional BN nanosheet and a two-dimensional Ti < 3 > C < 2 > T < x > MXene nanosheet are constructed into a two-dimensional electric conduction and heat conduction heterojunction through the electrostatic interaction and hydrogen-bond interaction of positive and negative charges, a one-dimensionalnano-crystalline cellulose network structure is adopted to enhance the mechanical property of the film; and finally, the composite flexible film with electromagnetic shielding and heat conduction functions is assembled in one step by adopting a filter pressing film forming method. The MXene / BN film prepared by the embodiment has a remarkable electromagnetic wave shielding effect, has the characteristics of good heat-conducting property, good bending flexibility and simple synthesis process, and can meet the specific requirements of electromagnetic shielding and heat-conducting devices and related industrial applications in practical applications of high-performance communication equipment, computers, smart phones, automobiles and the like.

Description

technical field [0001] The invention relates to a composite flexible film and a preparation method thereof, in particular to an electromagnetic shielding composite flexible film and a preparation method thereof, or to a thermally conductive composite flexible film and a preparation method thereof, which are applied to electromagnetic shielding composite materials or heat conduction functions Composite technology field. Background technique [0002] With the rapid development of electronic equipment and wireless transmission technology, the harm caused by electromagnetic interference and electromagnetic radiation to portable electronics, aerospace and national defense safety and human health is becoming more and more serious. Traditional electromagnetic shielding materials represented by metals are difficult to meet the needs of the development of lightweight and portable electronic products due to their shortcomings such as high density, poor flexibility, and easy corrosion....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K3/38C08K3/14C08J5/18H05K9/00
CPCC08J5/18H05K9/0081C08K2201/001C08K2201/011C08J2301/02C08K2003/385C08K3/14
Inventor 方建慧周千帆施利毅冯欣苗苗曹绍梅
Owner SHANGHAI UNIV
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