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Efficient heat-conducting graphene flexible film, and preparation and application in intelligent fire alarm

A thermally conductive graphite and graphene flexible technology, which is applied to the high-efficiency thermally conductive graphene flexible film and its preparation and application in intelligent fire alarms, can solve problems such as poor compatibility, prevent agglomeration, reduce interface thermal resistance and defects, and improve The effect of thermal conductivity

Active Publication Date: 2021-03-09
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Another object of the present invention is to provide a method for preparing the above-mentioned high-efficiency heat-conducting graphene flexible film. The preparation method aims at the disadvantage of poor compatibility between phosphorene and graphene oxide film, and adopts amination to modify phosphorene. Amino groups and carboxyl groups on graphene oxide form amide bonds to covalently combine phosphorene and graphene to prepare a highly efficient thermally conductive graphene flexible film of amidated phosphorene / reduced graphene oxide, which not only effectively prevents the agglomeration of phosphorene, but also Greatly improved thermal conductivity of the composite film

Method used

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  • Efficient heat-conducting graphene flexible film, and preparation and application in intelligent fire alarm
  • Efficient heat-conducting graphene flexible film, and preparation and application in intelligent fire alarm
  • Efficient heat-conducting graphene flexible film, and preparation and application in intelligent fire alarm

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Effect test

Embodiment 1

[0046](1) At room temperature, get 1.0g black phosphorus crystals and 30.0g urea and add 125ml of deionized water, then place ball milling in a planetary ball mill for 4 hours, and the rotating speed is 500r / min; Centrifuge at 1000r / min for 10 minutes, remove the large phosphorene in the lower layer, and collect the upper layer suspension; continue to centrifuge the upper layer suspension at 5000r / min for 30 minutes, take the lower layer of sediment and place it in a vacuum drying oven at 50°C Drying for 1 hour at lower temperature to obtain phosphorene amides;

[0047] (2) Take 20.0 mg of graphene oxide and add 40 ml of deionized water, stir to disperse evenly, and then 35 ° C, 200w ultrasonic for 30 minutes to obtain a graphene oxide dispersion; then transfer the graphene oxide dispersion to a three-necked flask, Add 4.0 mg of phosphorene amido prepared in step (1), adjust the pH between 7-10 with 10 wt % sodium carbonate solution, then add 2.0 mg of 1-ethyl-(3-dimethylamino...

Embodiment 2

[0050] (1) Under room temperature conditions, get 1.5g black phosphorus crystals and 60.0g urea and add 200ml of deionized water, then place ball milling in a planetary ball mill for 6 hours, and the rotating speed is 600r / min; Centrifuge at 1500r / min for 15 minutes, remove the large phosphorene in the lower layer, and collect the upper layer suspension; continue to centrifuge the upper layer suspension at 6000r / min for 35 minutes, take the lower layer of sediment and place it in a vacuum drying oven at 60°C Drying for 1 hour at lower temperature to obtain phosphorene amides;

[0051] (2) Take 25.0 mg of graphene oxide and add 50 ml of deionized water, stir to disperse evenly, 38 ° C, 200w ultrasonic for 60 minutes, to obtain a graphene oxide dispersion; then transfer the graphene oxide dispersion to a three-necked flask, add 6.0mg of phosphorene amido prepared in step (1), adjust the pH between 7-10 with 10wt% sodium carbonate solution, then add 2.5mg of 1-ethyl-(3-dimethylam...

Embodiment 3

[0054] (1) Under room temperature conditions, get 2.0g black phosphorus crystals and 80.0g urea and add the deionized water of 250ml, then place ball mill in planetary ball mill for 8 hours, and the rotating speed is 650r / min; Centrifuge at 2000r / min for 20 minutes, remove the bulk phosphorene in the lower layer, and collect the upper suspension; continue to centrifuge the upper suspension at 6500r / min for 40 minutes, take the lower sediment and place it in a vacuum drying oven at 70°C Under drying for 2 hours to obtain phosphorene amides;

[0055] (2) Take 30.0 mg of graphene oxide and add 60 ml of deionized water, stir to disperse evenly, ultrasonicate at 40°C and 250w for 50 minutes to obtain a graphene oxide dispersion; then transfer the graphene oxide dispersion to a three-necked flask, add 8.0mg of phosphorene amido prepared in step (1), adjust the pH between 7-10 with 10wt% sodium carbonate solution, then add 5.0mg of 1-ethyl-(3-dimethylaminopropyl) Carbodiimide and 6....

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Abstract

The invention belongs to the field of heat conduction materials, and particularly relates to an efficient heat-conducting graphene flexible film, and preparation and application in intelligent fire alarm. Amido on aminated phosphorene and carboxyl on graphene oxide form amido bonds to covalently bond phosphorene and graphene, so that the aminated phosphorene / reduced graphene oxide efficient heat-conducting graphene flexible film is prepared, agglomeration of phosphorene is effectively prevented, and interface thermal resistance and defects of graphene oxide are reduced; moreover, the thermal conductivity of the composite film is greatly improved; the efficient heat-conducting graphene flexible film has a heat conduction coefficient greater than 1000 W / mk in the plane direction, has a fireresponse time of about 1 s when applied to fire alarm, can be used as a heat conduction material of electronic and electrical appliances, and can also be used as a response material of intelligent fire alarm; and the preparation method of the efficient heat-conducting graphene flexible film is simple in preparation process and high in operability.

Description

technical field [0001] The invention belongs to the field of heat-conducting materials, and in particular relates to a highly efficient heat-conducting graphene flexible film and its preparation and application in intelligent fire alarms. Background technique [0002] With the rapid development of smart electronic technology and portable devices and the advent of the 5G era, product heat dissipation has become an important issue in the integrated and miniaturized electronics industry. In order to improve heat transfer efficiency, the development of thermal management materials with high thermal conductivity plays a vital role in improving the life and safety of electronic devices. Among the many thermal conductive materials, graphene ranks first with an absolute advantage of up to 5000W / mK. Although graphene has significant advantages such as strippability, unique size effect, high thermal conductivity, and strong heat dissipation ability, pure graphene cannot be formed int...

Claims

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Application Information

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IPC IPC(8): C09K5/14
CPCC09K5/14
Inventor 吴昆屈贞财徐长安郑浩铤孟惠发陈兵张强汪坤鑫
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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