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Functionalized boron nitride nanosheet/MXene/polybenzimidazole high-thermal-conductivity composite film and preparation method thereof

A technology of benzimidazole and composite film, which is applied in the field of composite materials, can solve the problems of insufficient thermal conductivity and other problems, and achieve the effect of simple method, wide application prospect and excellent thermal conductivity

Active Publication Date: 2021-03-26
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is carried out to solve the problem that the thermal conductivity of the above-mentioned single mixed filler filled polymer is not obvious enough, and the purpose is to provide a high thermal conductivity functionalized boron nitride nanosheet / MXene / polybenzimidazole high thermal conductivity composite Film and preparation method, using 2D mixed filler bridging synergy to better form a good mixed filler-polymer interface, reduce interfacial thermal resistance, build a good heat conduction path, and promote heat transfer

Method used

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  • Functionalized boron nitride nanosheet/MXene/polybenzimidazole high-thermal-conductivity composite film and preparation method thereof
  • Functionalized boron nitride nanosheet/MXene/polybenzimidazole high-thermal-conductivity composite film and preparation method thereof
  • Functionalized boron nitride nanosheet/MXene/polybenzimidazole high-thermal-conductivity composite film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] A preparation method of a composite film containing 1wt% boron nitride nanosheet / MXene mixed filler, the specific steps are as follows:

[0039] (1) The boron nitride powder was calcined under nitrogen gas in a tube furnace at 1000°C for 3h.

[0040] (2) 1 g of calcined boron nitride powder and 5 g of urea were placed in a round-bottomed flask, and under nitrogen gas, the oil bath was heated to 140° C. for a melting reaction for 6 h.

[0041] (3) After the reaction is completed, disperse the solid in 500ml deionized water, and perform ultrasonic stripping treatment for 10h to obtain a dispersion, then centrifuge the dispersion at 3000rpm for 10min to obtain a supernatant; filter the supernatant, and deionize The filter cake is washed, and the filtering method is preferably suction filtration, and the collected solid is dried at 60° C. for 10 h to obtain urea-functionalized boron nitride nanosheets.

[0042] (4) Add 1g of Ti 3 AlC 2 Gradually and slowly added to 20ml ...

Embodiment 2

[0046] A preparation method of a composite film containing 5wt% boron nitride nanosheet / MXene mixed filler, the specific steps are as follows:

[0047] (1) The boron nitride powder was calcined under nitrogen gas in a tube furnace at 1000°C for 3h.

[0048] (2) 1 g of calcined boron nitride powder and 5 g of urea were placed in a round-bottomed flask, and under nitrogen gas, the oil bath was heated to 140° C. for a melting reaction for 6 h.

[0049] (3) After the reaction is completed, disperse the solid in 500ml deionized water, and perform ultrasonic stripping treatment for 10h to obtain a dispersion, then centrifuge the dispersion at 3000rpm for 10min to obtain a supernatant; filter the supernatant, and deionize Washing, the method of filtering is preferably suction filtration, and drying the collected solid at 60° C. for 10 h to obtain urea-functionalized boron nitride nanosheets.

[0050] (4) Add 1g of Ti 3 AlC 2 Gradually and slowly added to 20ml of 40wt% hydrofluoric...

Embodiment 3

[0054] A preparation method of a composite film containing 10wt% boron nitride nanosheet / MXene mixed filler, the specific steps are as follows:

[0055] (1) The boron nitride powder was calcined under nitrogen gas in a tube furnace at 1000°C for 3h.

[0056] (2) 1 g of calcined boron nitride powder and 5 g of urea were placed in a round-bottomed flask, and under nitrogen gas, the oil bath was heated to 140° C. for a melting reaction for 6 h.

[0057] (3) After the reaction is completed, disperse the solid in 500ml deionized water, and perform ultrasonic stripping treatment for 10h to obtain a dispersion, then centrifuge the dispersion at 3000rpm for 10min to obtain a supernatant; filter the supernatant, and deionize Washing, the method of filtering is preferably suction filtration, and drying the collected solid at 60° C. for 10 h to obtain urea-functionalized boron nitride nanosheets.

[0058] (4) Add 1g of Ti 3 AlC 2 Gradually and slowly added to 20ml of 40wt% hydrofluori...

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Abstract

The invention belongs to the technical field of composite materials, and provides a functionalized boron nitride nanosheet / MXene / polybenzimidazole high-thermal-conductivity composite film and a preparation method thereof. The preparation method includes the steps: firstly, dispersing amino-functionalized boron nitride nanosheets and MXene nanosheets in a dispersing agent, obtaining a mixed solution after mixing, then adding polybenzimidazole into the mixed solution, to obtain a functionalized boron nitride nanosheet / MXene / polybenzimidazole blended solution, and carrying out suction filtrationon the mixed solution to obtain the composite film. A three-dimensional structure of a polybenzimidazole polymer is utilized, so that modified boron nitride and MXene with electronegativity are subjected to electrostatic self-assembly, and the self-supporting film taking polybenzimidazole as a framework and taking functionalized boron nitride nanosheets and MXene as mixed fillers is formed. The filling network formed by the synergistic effect of the boron nitride nanosheets and Ti3C2Tx bridging effectively reduces the interface thermal resistance, and endows the composite film with excellent heat-conducting property. The method is simple and effective, and the prepared high-thermal-conductivity film has a wide application prospect in the fields of energy, electronics and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a functionalized boron nitride nanosheet / MXene / polybenzimidazole high thermal conductivity composite film and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, electronic components and their equipment tend to be integrated, miniaturized and lightweight, and the integration level of these equipment is continuously improved, which means that a lot of heat will be generated during use. The concentration of large amounts of heat can have a detrimental effect on the safety and life of electronic components. Therefore, in order to ensure that the heat generated by the heating electronic components is discharged in time, and the electronic equipment can operate safely and stably for a long time, heat dissipation has become an urgent problem to be solved. [0003] Boron nitride has become a widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K3/38C08K7/00C08K3/14C08K9/04C08K9/02C08J5/18
CPCC08J5/18C08J2379/04C08K2201/011C08K2003/385C08K7/00C08K3/14C08K9/04C08K9/02
Inventor 范金辰莫瑞闵宇霖时鹏辉徐群杰秦习高晨淇
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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